Release 4.7 drivers/pinctrl/nomadik/pinctrl-nomadik.c

/*
 * Generic GPIO driver for logic cells found in the Nomadik SoC
 *
 * Copyright (C) 2008,2009 STMicroelectronics
 * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
 *   Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
 * Copyright (C) 2011-2013 Linus Walleij <linus.walleij@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/bitops.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
/* Since we request GPIOs from ourself */
#include <linux/pinctrl/consumer.h>
#include "pinctrl-nomadik.h"
#include "../core.h"
#include "../pinctrl-utils.h"

/*
 * The GPIO module in the Nomadik family of Systems-on-Chip is an
 * AMBA device, managing 32 pins and alternate functions.  The logic block
 * is currently used in the Nomadik and ux500.
 *
 * Symbols in this file are called "nmk_gpio" for "nomadik gpio"
 */

/*
 * pin configurations are represented by 32-bit integers:
 *
 *      bit  0.. 8 - Pin Number (512 Pins Maximum)
 *      bit  9..10 - Alternate Function Selection
 *      bit 11..12 - Pull up/down state
 *      bit     13 - Sleep mode behaviour
 *      bit     14 - Direction
 *      bit     15 - Value (if output)
 *      bit 16..18 - SLPM pull up/down state
 *      bit 19..20 - SLPM direction
 *      bit 21..22 - SLPM Value (if output)
 *      bit 23..25 - PDIS value (if input)
 *      bit     26 - Gpio mode
 *      bit     27 - Sleep mode
 *
 * to facilitate the definition, the following macros are provided
 *
 * PIN_CFG_DEFAULT - default config (0):
 *                   pull up/down = disabled
 *                   sleep mode = input/wakeup
 *                   direction = input
 *                   value = low
 *                   SLPM direction = same as normal
 *                   SLPM pull = same as normal
 *                   SLPM value = same as normal
 *
 * PIN_CFG         - default config with alternate function
 */


typedef unsigned long pin_cfg_t;


#define PIN_NUM_MASK		0x1ff

#define PIN_NUM(x)		((x) & PIN_NUM_MASK)


#define PIN_ALT_SHIFT		9

#define PIN_ALT_MASK		(0x3 << PIN_ALT_SHIFT)

#define PIN_ALT(x)		(((x) & PIN_ALT_MASK) >> PIN_ALT_SHIFT)

#define PIN_GPIO		(NMK_GPIO_ALT_GPIO << PIN_ALT_SHIFT)

#define PIN_ALT_A		(NMK_GPIO_ALT_A << PIN_ALT_SHIFT)

#define PIN_ALT_B		(NMK_GPIO_ALT_B << PIN_ALT_SHIFT)

#define PIN_ALT_C		(NMK_GPIO_ALT_C << PIN_ALT_SHIFT)


#define PIN_PULL_SHIFT		11

#define PIN_PULL_MASK		(0x3 << PIN_PULL_SHIFT)

#define PIN_PULL(x)		(((x) & PIN_PULL_MASK) >> PIN_PULL_SHIFT)

#define PIN_PULL_NONE		(NMK_GPIO_PULL_NONE << PIN_PULL_SHIFT)

#define PIN_PULL_UP		(NMK_GPIO_PULL_UP << PIN_PULL_SHIFT)

#define PIN_PULL_DOWN		(NMK_GPIO_PULL_DOWN << PIN_PULL_SHIFT)


#define PIN_SLPM_SHIFT		13

#define PIN_SLPM_MASK		(0x1 << PIN_SLPM_SHIFT)

#define PIN_SLPM(x)		(((x) & PIN_SLPM_MASK) >> PIN_SLPM_SHIFT)

#define PIN_SLPM_MAKE_INPUT	(NMK_GPIO_SLPM_INPUT << PIN_SLPM_SHIFT)

#define PIN_SLPM_NOCHANGE	(NMK_GPIO_SLPM_NOCHANGE << PIN_SLPM_SHIFT)
/* These two replace the above in DB8500v2+ */

#define PIN_SLPM_WAKEUP_ENABLE	(NMK_GPIO_SLPM_WAKEUP_ENABLE << PIN_SLPM_SHIFT)

#define PIN_SLPM_WAKEUP_DISABLE	(NMK_GPIO_SLPM_WAKEUP_DISABLE << PIN_SLPM_SHIFT)

#define PIN_SLPM_USE_MUX_SETTINGS_IN_SLEEP PIN_SLPM_WAKEUP_DISABLE


#define PIN_SLPM_GPIO  PIN_SLPM_WAKEUP_ENABLE 
/* In SLPM, pin is a gpio */

#define PIN_SLPM_ALTFUNC PIN_SLPM_WAKEUP_DISABLE 
/* In SLPM, pin is altfunc */


#define PIN_DIR_SHIFT		14

#define PIN_DIR_MASK		(0x1 << PIN_DIR_SHIFT)

#define PIN_DIR(x)		(((x) & PIN_DIR_MASK) >> PIN_DIR_SHIFT)

#define PIN_DIR_INPUT		(0 << PIN_DIR_SHIFT)

#define PIN_DIR_OUTPUT		(1 << PIN_DIR_SHIFT)


#define PIN_VAL_SHIFT		15

#define PIN_VAL_MASK		(0x1 << PIN_VAL_SHIFT)

#define PIN_VAL(x)		(((x) & PIN_VAL_MASK) >> PIN_VAL_SHIFT)

#define PIN_VAL_LOW		(0 << PIN_VAL_SHIFT)

#define PIN_VAL_HIGH		(1 << PIN_VAL_SHIFT)


#define PIN_SLPM_PULL_SHIFT	16

#define PIN_SLPM_PULL_MASK	(0x7 << PIN_SLPM_PULL_SHIFT)

#define PIN_SLPM_PULL(x)	\
	(((x) & PIN_SLPM_PULL_MASK) >> PIN_SLPM_PULL_SHIFT)

#define PIN_SLPM_PULL_NONE	\
	((1 + NMK_GPIO_PULL_NONE) << PIN_SLPM_PULL_SHIFT)

#define PIN_SLPM_PULL_UP	\
	((1 + NMK_GPIO_PULL_UP) << PIN_SLPM_PULL_SHIFT)

#define PIN_SLPM_PULL_DOWN	\
	((1 + NMK_GPIO_PULL_DOWN) << PIN_SLPM_PULL_SHIFT)


#define PIN_SLPM_DIR_SHIFT	19

#define PIN_SLPM_DIR_MASK	(0x3 << PIN_SLPM_DIR_SHIFT)

#define PIN_SLPM_DIR(x)		\
	(((x) & PIN_SLPM_DIR_MASK) >> PIN_SLPM_DIR_SHIFT)

#define PIN_SLPM_DIR_INPUT	((1 + 0) << PIN_SLPM_DIR_SHIFT)

#define PIN_SLPM_DIR_OUTPUT	((1 + 1) << PIN_SLPM_DIR_SHIFT)


#define PIN_SLPM_VAL_SHIFT	21

#define PIN_SLPM_VAL_MASK	(0x3 << PIN_SLPM_VAL_SHIFT)

#define PIN_SLPM_VAL(x)		\
	(((x) & PIN_SLPM_VAL_MASK) >> PIN_SLPM_VAL_SHIFT)

#define PIN_SLPM_VAL_LOW	((1 + 0) << PIN_SLPM_VAL_SHIFT)

#define PIN_SLPM_VAL_HIGH	((1 + 1) << PIN_SLPM_VAL_SHIFT)


#define PIN_SLPM_PDIS_SHIFT		23

#define PIN_SLPM_PDIS_MASK		(0x3 << PIN_SLPM_PDIS_SHIFT)

#define PIN_SLPM_PDIS(x)	\
	(((x) & PIN_SLPM_PDIS_MASK) >> PIN_SLPM_PDIS_SHIFT)

#define PIN_SLPM_PDIS_NO_CHANGE		(0 << PIN_SLPM_PDIS_SHIFT)

#define PIN_SLPM_PDIS_DISABLED		(1 << PIN_SLPM_PDIS_SHIFT)

#define PIN_SLPM_PDIS_ENABLED		(2 << PIN_SLPM_PDIS_SHIFT)


#define PIN_LOWEMI_SHIFT	25

#define PIN_LOWEMI_MASK		(0x1 << PIN_LOWEMI_SHIFT)

#define PIN_LOWEMI(x)		(((x) & PIN_LOWEMI_MASK) >> PIN_LOWEMI_SHIFT)

#define PIN_LOWEMI_DISABLED	(0 << PIN_LOWEMI_SHIFT)

#define PIN_LOWEMI_ENABLED	(1 << PIN_LOWEMI_SHIFT)


#define PIN_GPIOMODE_SHIFT	26

#define PIN_GPIOMODE_MASK	(0x1 << PIN_GPIOMODE_SHIFT)

#define PIN_GPIOMODE(x)		(((x) & PIN_GPIOMODE_MASK) >> PIN_GPIOMODE_SHIFT)

#define PIN_GPIOMODE_DISABLED	(0 << PIN_GPIOMODE_SHIFT)

#define PIN_GPIOMODE_ENABLED	(1 << PIN_GPIOMODE_SHIFT)


#define PIN_SLEEPMODE_SHIFT	27

#define PIN_SLEEPMODE_MASK	(0x1 << PIN_SLEEPMODE_SHIFT)

#define PIN_SLEEPMODE(x)	(((x) & PIN_SLEEPMODE_MASK) >> PIN_SLEEPMODE_SHIFT)

#define PIN_SLEEPMODE_DISABLED	(0 << PIN_SLEEPMODE_SHIFT)

#define PIN_SLEEPMODE_ENABLED	(1 << PIN_SLEEPMODE_SHIFT)


/* Shortcuts.  Use these instead of separate DIR, PULL, and VAL.  */

#define PIN_INPUT_PULLDOWN	(PIN_DIR_INPUT | PIN_PULL_DOWN)

#define PIN_INPUT_PULLUP	(PIN_DIR_INPUT | PIN_PULL_UP)

#define PIN_INPUT_NOPULL	(PIN_DIR_INPUT | PIN_PULL_NONE)

#define PIN_OUTPUT_LOW		(PIN_DIR_OUTPUT | PIN_VAL_LOW)

#define PIN_OUTPUT_HIGH		(PIN_DIR_OUTPUT | PIN_VAL_HIGH)


#define PIN_SLPM_INPUT_PULLDOWN	(PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_DOWN)

#define PIN_SLPM_INPUT_PULLUP	(PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_UP)

#define PIN_SLPM_INPUT_NOPULL	(PIN_SLPM_DIR_INPUT | PIN_SLPM_PULL_NONE)

#define PIN_SLPM_OUTPUT_LOW	(PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_LOW)

#define PIN_SLPM_OUTPUT_HIGH	(PIN_SLPM_DIR_OUTPUT | PIN_SLPM_VAL_HIGH)


#define PIN_CFG_DEFAULT		(0)


#define PIN_CFG(num, alt)		\
	(PIN_CFG_DEFAULT |\
         (PIN_NUM(num) | PIN_##alt))


#define PIN_CFG_INPUT(num, alt, pull)		\
	(PIN_CFG_DEFAULT |\
         (PIN_NUM(num) | PIN_##alt | PIN_INPUT_##pull))


#define PIN_CFG_OUTPUT(num, alt, val)		\
	(PIN_CFG_DEFAULT |\
         (PIN_NUM(num) | PIN_##alt | PIN_OUTPUT_##val))

/*
 * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
 * the "gpio" namespace for generic and cross-machine functions
 */


#define GPIO_BLOCK_SHIFT 5

#define NMK_GPIO_PER_CHIP (1 << GPIO_BLOCK_SHIFT)

#define NMK_MAX_BANKS DIV_ROUND_UP(ARCH_NR_GPIOS, NMK_GPIO_PER_CHIP)

/* Register in the logic block */

#define NMK_GPIO_DAT	0x00

#define NMK_GPIO_DATS	0x04

#define NMK_GPIO_DATC	0x08

#define NMK_GPIO_PDIS	0x0c

#define NMK_GPIO_DIR	0x10

#define NMK_GPIO_DIRS	0x14

#define NMK_GPIO_DIRC	0x18

#define NMK_GPIO_SLPC	0x1c

#define NMK_GPIO_AFSLA	0x20

#define NMK_GPIO_AFSLB	0x24

#define NMK_GPIO_LOWEMI	0x28


#define NMK_GPIO_RIMSC	0x40

#define NMK_GPIO_FIMSC	0x44

#define NMK_GPIO_IS	0x48

#define NMK_GPIO_IC	0x4c

#define NMK_GPIO_RWIMSC	0x50

#define NMK_GPIO_FWIMSC	0x54

#define NMK_GPIO_WKS	0x58
/* These appear in DB8540 and later ASICs */

#define NMK_GPIO_EDGELEVEL 0x5C

#define NMK_GPIO_LEVEL	0x60


/* Pull up/down values */

enum nmk_gpio_pull {
	
NMK_GPIO_PULL_NONE,
	
NMK_GPIO_PULL_UP,
	
NMK_GPIO_PULL_DOWN,
};

/* Sleep mode */

enum nmk_gpio_slpm {
	
NMK_GPIO_SLPM_INPUT,
	
NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
	
NMK_GPIO_SLPM_NOCHANGE,
	
NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
};


struct nmk_gpio_chip {
	
struct gpio_chip chip;
	
struct irq_chip irqchip;
	
void __iomem *addr;
	
struct clk *clk;
	
unsigned int bank;
	
unsigned int parent_irq;
	
int latent_parent_irq;
	
u32 (*get_latent_status)(unsigned int bank);
	
void (*set_ioforce)(bool enable);
	
spinlock_t lock;
	
bool sleepmode;
	/* Keep track of configured edges */
	
u32 edge_rising;
	
u32 edge_falling;
	
u32 real_wake;
	
u32 rwimsc;
	
u32 fwimsc;
	
u32 rimsc;
	
u32 fimsc;
	
u32 pull_up;
	
u32 lowemi;
};

/**
 * struct nmk_pinctrl - state container for the Nomadik pin controller
 * @dev: containing device pointer
 * @pctl: corresponding pin controller device
 * @soc: SoC data for this specific chip
 * @prcm_base: PRCM register range virtual base
 */

struct nmk_pinctrl {
	
struct device *dev;
	
struct pinctrl_dev *pctl;
	
const struct nmk_pinctrl_soc_data *soc;
	
void __iomem *prcm_base;
};


static struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS];

static DEFINE_SPINLOCK(nmk_gpio_slpm_lock);


#define NUM_BANKS ARRAY_SIZE(nmk_gpio_chips)



static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip,
				unsigned offset, int gpio_mode)
{
	u32 afunc, bfunc;

	afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~BIT(offset);
	bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~BIT(offset);
	if (gpio_mode & NMK_GPIO_ALT_A)
		afunc |= BIT(offset);
	if (gpio_mode & NMK_GPIO_ALT_B)
		bfunc |= BIT(offset);
	writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
	writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
}

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static void __nmk_gpio_set_slpm(struct nmk_gpio_chip *nmk_chip,
				unsigned offset, enum nmk_gpio_slpm mode)
{
	u32 slpm;

	slpm = readl(nmk_chip->addr + NMK_GPIO_SLPC);
	if (mode == NMK_GPIO_SLPM_NOCHANGE)
		slpm |= BIT(offset);
	else
		slpm &= ~BIT(offset);
	writel(slpm, nmk_chip->addr + NMK_GPIO_SLPC);
}

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static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip,
				unsigned offset, enum nmk_gpio_pull pull)
{
	u32 pdis;

	pdis = readl(nmk_chip->addr + NMK_GPIO_PDIS);
	if (pull == NMK_GPIO_PULL_NONE) {
		pdis |= BIT(offset);
		nmk_chip->pull_up &= ~BIT(offset);
	} else {
		pdis &= ~BIT(offset);
	}

	writel(pdis, nmk_chip->addr + NMK_GPIO_PDIS);

	if (pull == NMK_GPIO_PULL_UP) {
		nmk_chip->pull_up |= BIT(offset);
		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATS);
	} else if (pull == NMK_GPIO_PULL_DOWN) {
		nmk_chip->pull_up &= ~BIT(offset);
		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATC);
	}
}

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static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip,
				  unsigned offset, bool lowemi)
{
	bool enabled = nmk_chip->lowemi & BIT(offset);

	if (lowemi == enabled)
		return;

	if (lowemi)
		nmk_chip->lowemi |= BIT(offset);
	else
		nmk_chip->lowemi &= ~BIT(offset);

	writel_relaxed(nmk_chip->lowemi,
		       nmk_chip->addr + NMK_GPIO_LOWEMI);
}

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static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip,
				  unsigned offset)
{
	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRC);
}

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static void __nmk_gpio_set_output(struct nmk_gpio_chip *nmk_chip,
				  unsigned offset, int val)
{
	if (val)
		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATS);
	else
		writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DATC);
}

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static void __nmk_gpio_make_output(struct nmk_gpio_chip *nmk_chip,
				  unsigned offset, int val)
{
	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRS);
	__nmk_gpio_set_output(nmk_chip, offset, val);
}

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static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip,
				     unsigned offset, int gpio_mode,
				     bool glitch)
{
	u32 rwimsc = nmk_chip->rwimsc;
	u32 fwimsc = nmk_chip->fwimsc;

	if (glitch && nmk_chip->set_ioforce) {
		u32 bit = BIT(offset);

		/* Prevent spurious wakeups */
		writel(rwimsc & ~bit, nmk_chip->addr + NMK_GPIO_RWIMSC);
		writel(fwimsc & ~bit, nmk_chip->addr + NMK_GPIO_FWIMSC);

		nmk_chip->set_ioforce(true);
	}

	__nmk_gpio_set_mode(nmk_chip, offset, gpio_mode);

	if (glitch && nmk_chip->set_ioforce) {
		nmk_chip->set_ioforce(false);

		writel(rwimsc, nmk_chip->addr + NMK_GPIO_RWIMSC);
		writel(fwimsc, nmk_chip->addr + NMK_GPIO_FWIMSC);
	}
}

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static void

nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned offset)
{
	u32 falling = nmk_chip->fimsc & BIT(offset);
	u32 rising = nmk_chip->rimsc & BIT(offset);
	int gpio = nmk_chip->chip.base + offset;
	int irq = irq_find_mapping(nmk_chip->chip.irqdomain, offset);
	struct irq_data *d = irq_get_irq_data(irq);

	if (!rising && !falling)
		return;

	if (!d || !irqd_irq_disabled(d))
		return;

	if (rising) {
		nmk_chip->rimsc &= ~BIT(offset);
		writel_relaxed(nmk_chip->rimsc,
			       nmk_chip->addr + NMK_GPIO_RIMSC);
	}

	if (falling) {
		nmk_chip->fimsc &= ~BIT(offset);
		writel_relaxed(nmk_chip->fimsc,
			       nmk_chip->addr + NMK_GPIO_FIMSC);
	}

	dev_dbg(nmk_chip->chip.parent, "%d: clearing interrupt mask\n", gpio);
}

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static void nmk_write_masked(void __iomem *reg, u32 mask, u32 value)
{
	u32 val;

	val = readl(reg);
	val = ((val & ~mask) | (value & mask));
	writel(val, reg);
}

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static void nmk_prcm_altcx_set_mode(struct nmk_pinctrl *npct,
	unsigned offset, unsigned alt_num)
{
	int i;
	u16 reg;
	u8 bit;
	u8 alt_index;
	const struct prcm_gpiocr_altcx_pin_desc *pin_desc;
	const u16 *gpiocr_regs;

	if (!npct->prcm_base)
		return;

	if (alt_num > PRCM_IDX_GPIOCR_ALTC_MAX) {
		dev_err(npct->dev, "PRCM GPIOCR: alternate-C%i is invalid\n",
			alt_num);
		return;
	}

	for (i = 0 ; i < npct->soc->npins_altcx ; i++) {
		if (npct->soc->altcx_pins[i].pin == offset)
			break;
	}
	if (i == npct->soc->npins_altcx) {
		dev_dbg(npct->dev, "PRCM GPIOCR: pin %i is not found\n",
			offset);
		return;
	}

	pin_desc = npct->soc->altcx_pins + i;
	gpiocr_regs = npct->soc->prcm_gpiocr_registers;

	/*
         * If alt_num is NULL, just clear current ALTCx selection
         * to make sure we come back to a pure ALTC selection
         */
	if (!alt_num) {
		for (i = 0 ; i < PRCM_IDX_GPIOCR_ALTC_MAX ; i++) {
			if (pin_desc->altcx[i].used == true) {
				reg = gpiocr_regs[pin_desc->altcx[i].reg_index];
				bit = pin_desc->altcx[i].control_bit;
				if (readl(npct->prcm_base + reg) & BIT(bit)) {
					nmk_write_masked(npct->prcm_base + reg, BIT(bit), 0);
					dev_dbg(npct->dev,
						"PRCM GPIOCR: pin %i: alternate-C%i has been disabled\n",
						offset, i+1);
				}
			}
		}
		return;
	}

	alt_index = alt_num - 1;
	if (pin_desc->altcx[alt_index].used == false) {
		dev_warn(npct->dev,
			"PRCM GPIOCR: pin %i: alternate-C%i does not exist\n",
			offset, alt_num);
		return;
	}

	/*
         * Check if any other ALTCx functions are activated on this pin
         * and disable it first.
         */
	for (i = 0 ; i < PRCM_IDX_GPIOCR_ALTC_MAX ; i++) {
		if (i == alt_index)
			continue;
		if (pin_desc->altcx[i].used == true) {
			reg = gpiocr_regs[pin_desc->altcx[i].reg_index];
			bit = pin_desc->altcx[i].control_bit;
			if (readl(npct->prcm_base + reg) & BIT(bit)) {
				nmk_write_masked(npct->prcm_base + reg, BIT(bit), 0);
				dev_dbg(npct->dev,
					"PRCM GPIOCR: pin %i: alternate-C%i has been disabled\n",
					offset, i+1);
			}
		}
	}

	reg = gpiocr_regs[pin_desc->altcx[alt_index].reg_index];
	bit = pin_desc->altcx[alt_index].control_bit;
	dev_dbg(npct->dev, "PRCM GPIOCR: pin %i: alternate-C%i has been selected\n",
		offset, alt_index+1);
	nmk_write_masked(npct->prcm_base + reg, BIT(bit), BIT(bit));
}

Contributors
Person
Tokens
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Commits
CommitProp
jean-nicolas graux
jean-nicolas graux
431
92.89%
1
33.33%
jonas aberg
jonas aberg
25
5.39%
1
33.33%
fabio baltieri
fabio baltieri
8
1.72%
1
33.33%
Total
464
100.00%
3
100.00%

/*
 * Safe sequence used to switch IOs between GPIO and Alternate-C mode:
 *  - Save SLPM registers
 *  - Set SLPM=0 for the IOs you want to switch and others to 1
 *  - Configure the GPIO registers for the IOs that are being switched
 *  - Set IOFORCE=1
 *  - Modify the AFLSA/B registers for the IOs that are being switched
 *  - Set IOFORCE=0
 *  - Restore SLPM registers
 *  - Any spurious wake up event during switch sequence to be ignored and
 *    cleared
 */


static void nmk_gpio_glitch_slpm_init(unsigned int *slpm)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];
		unsigned int temp = slpm[i];

		if (!chip)
			break;

		clk_enable(chip->clk);

		slpm[i] = readl(chip->addr + NMK_GPIO_SLPC);
		writel(temp, chip->addr + NMK_GPIO_SLPC);
	}
}

Contributors
Person
Tokens
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CommitProp
linus walleij
linus walleij
55
63.95%
1
25.00%
rabin vincent
rabin vincent
29
33.72%
2
50.00%
lee jones
lee jones
2
2.33%
1
25.00%
Total
86
100.00%
4
100.00%



static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];

		if (!chip)
			break;

		writel(slpm[i], chip->addr + NMK_GPIO_SLPC);

		clk_disable(chip->clk);
	}
}

Contributors
Person
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CommitProp
linus walleij
linus walleij
40
60.61%
1
25.00%
alessandro rubini
alessandro rubini
17
25.76%
1
25.00%
rabin vincent
rabin vincent
6
9.09%
1
25.00%
lee jones
lee jones
3
4.55%
1
25.00%
Total
66
100.00%
4
100.00%



static int __maybe_unused nmk_prcm_gpiocr_get_mode(struct pinctrl_dev *pctldev, int gpio)
{
	int i;
	u16 reg;
	u8 bit;
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
	const struct prcm_gpiocr_altcx_pin_desc *pin_desc;
	const u16 *gpiocr_regs;

	if (!npct->prcm_base)
		return NMK_GPIO_ALT_C;

	for (i = 0; i < npct->soc->npins_altcx; i++) {
		if (npct->soc->altcx_pins[i].pin == gpio)
			break;
	}
	if (i == npct->soc->npins_altcx)
		return NMK_GPIO_ALT_C;

	pin_desc = npct->soc->altcx_pins + i;
	gpiocr_regs = npct->soc->prcm_gpiocr_registers;
	for (i = 0; i < PRCM_IDX_GPIOCR_ALTC_MAX; i++) {
		if (pin_desc->altcx[i].used == true) {
			reg = gpiocr_regs[pin_desc->altcx[i].reg_index];
			bit = pin_desc->altcx[i].control_bit;
			if (readl(npct->prcm_base + reg) & BIT(bit))
				return NMK_GPIO_ALT_C+i+1;
		}
	}
	return NMK_GPIO_ALT_C;
}

Contributors
Person
Tokens
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jean-nicolas graux
jean-nicolas graux
186
92.08%
1
25.00%
fabio baltieri
fabio baltieri
10
4.95%
1
25.00%
jonas aberg
jonas aberg
5
2.48%
1
25.00%
arnd bergmann
arnd bergmann
1
0.50%
1
25.00%
Total
202
100.00%
4
100.00%

/* IRQ functions */



static void nmk_gpio_irq_ack(struct irq_data *d)
{
	struct gpio_chip *chip = irq_data_get_irq_chip_data(d);
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);

	clk_enable(nmk_chip->clk);
	writel(BIT(d->hwirq), nmk_chip->addr + NMK_GPIO_IC);
	clk_disable(nmk_chip->clk);
}

Contributors
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alessandro rubini
alessandro rubini
24
39.34%
1
14.29%
rabin vincent
rabin vincent
14
22.95%
1
14.29%
linus walleij
linus walleij
14
22.95%
3
42.86%
lennert buytenhek
lennert buytenhek
6
9.84%
1
14.29%
lee jones
lee jones
3
4.92%
1
14.29%
Total
61
100.00%
7
100.00%


enum nmk_gpio_irq_type {
	
NORMAL,
	
WAKE,
};



static void __nmk_gpio_irq_modify(struct nmk_gpio_chip *nmk_chip,
				  int offset, enum nmk_gpio_irq_type which,
				  bool enable)
{
	u32 *rimscval;
	u32 *fimscval;
	u32 rimscreg;
	u32 fimscreg;

	if (which == NORMAL) {
		rimscreg = NMK_GPIO_RIMSC;
		fimscreg = NMK_GPIO_FIMSC;
		rimscval = &nmk_chip->rimsc;
		fimscval = &nmk_chip->fimsc;
	} else  {
		rimscreg = NMK_GPIO_RWIMSC;
		fimscreg = NMK_GPIO_FWIMSC;
		rimscval = &nmk_chip->rwimsc;
		fimscval = &nmk_chip->fwimsc;
	}

	/* we must individually set/clear the two edges */
	if (nmk_chip->edge_rising & BIT(offset)) {
		if (enable)
			*rimscval |= BIT(offset);
		else
			*rimscval &= ~BIT(offset);
		writel(*rimscval, nmk_chip->addr + rimscreg);
	}
	if (nmk_chip->edge_falling & BIT(offset)) {
		if (enable)
			*fimscval |= BIT(offset);
		else
			*fimscval &= ~BIT(offset);
		writel(*fimscval, nmk_chip->addr + fimscreg);
	}
}

Contributors
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rabin vincent
rabin vincent
108
58.38%
3
60.00%
alessandro rubini
alessandro rubini
52
28.11%
1
20.00%
linus walleij
linus walleij
25
13.51%
1
20.00%
Total
185
100.00%
5
100.00%



static void __nmk_gpio_set_wake(struct nmk_gpio_chip *nmk_chip,
				int offset, bool on)
{
	/*
         * Ensure WAKEUP_ENABLE is on.  No need to disable it if wakeup is
         * disabled, since setting SLPM to 1 increases power consumption, and
         * wakeup is anyhow controlled by the RIMSC and FIMSC registers.
         */
	if (nmk_chip->sleepmode && on) {
		__nmk_gpio_set_slpm(nmk_chip, offset,
				    NMK_GPIO_SLPM_WAKEUP_ENABLE);
	}

	__nmk_gpio_irq_modify(nmk_chip, offset, WAKE, on);
}

Contributors
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rabin vincent
rabin vincent
28
58.33%
3
50.00%
linus walleij
linus walleij
19
39.58%
2
33.33%
alessandro rubini
alessandro rubini
1
2.08%
1
16.67%
Total
48
100.00%
6
100.00%



static int nmk_gpio_irq_maskunmask(struct irq_data *d, bool enable)
{
	struct nmk_gpio_chip *nmk_chip;
	unsigned long flags;

	nmk_chip = irq_data_get_irq_chip_data(d);
	if (!nmk_chip)
		return -EINVAL;

	clk_enable(nmk_chip->clk);
	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
	spin_lock(&nmk_chip->lock);

	__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, enable);

	if (!(nmk_chip->real_wake & BIT(d->hwirq)))
		__nmk_gpio_set_wake(nmk_chip, d->hwirq, enable);

	spin_unlock(&nmk_chip->lock);
	spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
	clk_disable(nmk_chip->clk);

	return 0;
}

Contributors
Person
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rabin vincent
rabin vincent
67
52.34%
4
44.44%
alessandro rubini
alessandro rubini
40
31.25%
1
11.11%
lee jones
lee jones
6
4.69%
1
11.11%
lennert buytenhek
lennert buytenhek
6
4.69%
1
11.11%
linus walleij
linus walleij
6
4.69%
1
11.11%
thomas gleixner
thomas gleixner
3
2.34%
1
11.11%
Total
128
100.00%
9
100.00%



static void nmk_gpio_irq_mask(struct irq_data *d)
{
	nmk_gpio_irq_maskunmask(d, false);
}

Contributors
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rabin vincent
rabin vincent
7
38.89%
2
50.00%
alessandro rubini
alessandro rubini
6
33.33%
1
25.00%
lennert buytenhek
lennert buytenhek
5
27.78%
1
25.00%
Total
18
100.00%
4
100.00%



static void nmk_gpio_irq_unmask(struct irq_data *d)
{
	nmk_gpio_irq_maskunmask(d, true);
}

Contributors
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rabin vincent
rabin vincent
8
44.44%
2
50.00%
alessandro rubini
alessandro rubini
5
27.78%
1
25.00%
lennert buytenhek
lennert buytenhek
5
27.78%
1
25.00%
Total
18
100.00%
4
100.00%



static int nmk_gpio_irq_set_wake(struct irq_data *d, unsigned int on)
{
	struct nmk_gpio_chip *nmk_chip;
	unsigned long flags;

	nmk_chip = irq_data_get_irq_chip_data(d);
	if (!nmk_chip)
		return -EINVAL;

	clk_enable(nmk_chip->clk);
	spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);
	spin_lock(&nmk_chip->lock);

	if (irqd_irq_disabled(d))
		__nmk_gpio_set_wake(nmk_chip, d->hwirq, on);

	if (on)
		nmk_chip->real_wake |= BIT(d->hwirq);
	else
		nmk_chip->real_wake &= ~BIT(d->hwirq);

	spin_unlock(&nmk_chip->lock);
	spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
	clk_disable(nmk_chip->clk);

	return 0;
}

Contributors
Person
Tokens
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rabin vincent
rabin vincent
110
81.48%
5
55.56%
linus walleij
linus walleij
16
11.85%
2
22.22%
lennert buytenhek
lennert buytenhek
6
4.44%
1
11.11%
lee jones
lee jones
3
2.22%
1
11.11%
Total
135
100.00%
9
100.00%



static int nmk_gpio_irq_set_type(struct irq_data *d, unsigned int type)
{
	bool enabled = !irqd_irq_disabled(d);
	bool wake = irqd_is_wakeup_set(d);
	struct nmk_gpio_chip *nmk_chip;
	unsigned long flags;

	nmk_chip = irq_data_get_irq_chip_data(d);
	if (!nmk_chip)
		return -EINVAL;
	if (type & IRQ_TYPE_LEVEL_HIGH)
		return -EINVAL;
	if (type & IRQ_TYPE_LEVEL_LOW)
		return -EINVAL;

	clk_enable(nmk_chip->clk);
	spin_lock_irqsave(&nmk_chip->lock, flags);

	if (enabled)
		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, false);

	if (enabled || wake)
		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, false);

	nmk_chip->edge_rising &= ~BIT(d->hwirq);
	if (type & IRQ_TYPE_EDGE_RISING)
		nmk_chip->edge_rising |= BIT(d->hwirq);

	nmk_chip->edge_falling &= ~BIT(d->hwirq);
	if (type & IRQ_TYPE_EDGE_FALLING)
		nmk_chip->edge_falling |= BIT(d->hwirq);

	if (enabled)
		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, NORMAL, true);

	if (enabled || wake)
		__nmk_gpio_irq_modify(nmk_chip, d->hwirq, WAKE, true);

	spin_unlock_irqrestore(&nmk_chip->lock, flags);
	clk_disable(nmk_chip->clk);

	return 0;
}

Contributors
Person
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alessandro rubini
alessandro rubini
116
47.54%
1
10.00%
rabin vincent
rabin vincent
73
29.92%
4
40.00%
linus walleij
linus walleij
30
12.30%
2
20.00%
lee jones
lee jones
12
4.92%
1
10.00%
thomas gleixner
thomas gleixner
7
2.87%
1
10.00%
lennert buytenhek
lennert buytenhek
6
2.46%
1
10.00%
Total
244
100.00%
10
100.00%



static unsigned int nmk_gpio_irq_startup(struct irq_data *d)
{
	struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d);

	clk_enable(nmk_chip->clk);
	nmk_gpio_irq_unmask(d);
	return 0;
}

Contributors
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rabin vincent
rabin vincent
33
89.19%
1
50.00%
alessandro rubini
alessandro rubini
4
10.81%
1
50.00%
Total
37
100.00%
2
100.00%



static void nmk_gpio_irq_shutdown(struct irq_data *d)
{
	struct nmk_gpio_chip *nmk_chip = irq_data_get_irq_chip_data(d);

	nmk_gpio_irq_mask(d);
	clk_disable(nmk_chip->clk);
}

Contributors
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rabin vincent
rabin vincent
33
100.00%
1
100.00%
Total
33
100.00%
1
100.00%



static void __nmk_gpio_irq_handler(struct irq_desc *desc, u32 status)
{
	struct irq_chip *host_chip = irq_desc_get_chip(desc);
	struct gpio_chip *chip = irq_desc_get_handler_data(desc);

	chained_irq_enter(host_chip, desc);

	while (status) {
		int bit = __ffs(status);

		generic_handle_irq(irq_find_mapping(chip->irqdomain, bit));
		status &= ~BIT(bit);
	}

	chained_irq_exit(host_chip, desc);
}

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alessandro rubini
alessandro rubini
30
36.59%
1
12.50%
rabin vincent
rabin vincent
26
31.71%
2
25.00%
linus walleij
linus walleij
17
20.73%
2
25.00%
will deacon
will deacon
5
6.10%
1
12.50%
jiang liu
jiang liu
2
2.44%
1
12.50%
lennert buytenhek
lennert buytenhek
2
2.44%
1
12.50%
Total
82
100.00%
8
100.00%



static void nmk_gpio_irq_handler(struct irq_desc *desc)
{
	struct gpio_chip *chip = irq_desc_get_handler_data(desc);
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
	u32 status;

	clk_enable(nmk_chip->clk);
	status = readl(nmk_chip->addr + NMK_GPIO_IS);
	clk_disable(nmk_chip->clk);

	__nmk_gpio_irq_handler(desc, status);
}

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rabin vincent
rabin vincent
54
81.82%
2
50.00%
linus walleij
linus walleij
12
18.18%
2
50.00%
Total
66
100.00%
4
100.00%



static void nmk_gpio_latent_irq_handler(struct irq_desc *desc)
{
	struct gpio_chip *chip = irq_desc_get_handler_data(desc);
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
	u32 status = nmk_chip->get_latent_status(nmk_chip->bank);

	__nmk_gpio_irq_handler(desc, status);
}

Contributors
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rabin vincent
rabin vincent
36
72.00%
1
25.00%
linus walleij
linus walleij
14
28.00%
3
75.00%
Total
50
100.00%
4
100.00%

/* I/O Functions */



static int nmk_gpio_get_dir(struct gpio_chip *chip, unsigned offset)
{
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
	int dir;

	clk_enable(nmk_chip->clk);

	dir = !(readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset));

	clk_disable(nmk_chip->clk);

	return dir;
}

Contributors
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linus walleij
linus walleij
63
100.00%
1
100.00%
Total
63
100.00%
1
100.00%



static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
{
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);

	clk_enable(nmk_chip->clk);

	writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRC);

	clk_disable(nmk_chip->clk);

	return 0;
}

Contributors
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alessandro rubini
alessandro rubini
37
67.27%
1
25.00%
rabin vincent
rabin vincent
14
25.45%
1
25.00%
linus walleij
linus walleij
4
7.27%
2
50.00%
Total
55
100.00%
4
100.00%



static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
{
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
	int value;

	clk_enable(nmk_chip->clk);

	value = !!(readl(nmk_chip->addr + NMK_GPIO_DAT) & BIT(offset));

	clk_disable(nmk_chip->clk);

	return value;
}

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rabin vincent
rabin vincent
29
45.31%
2
40.00%
alessandro rubini
alessandro rubini
28
43.75%
1
20.00%
linus walleij
linus walleij
7
10.94%
2
40.00%
Total
64
100.00%
5
100.00%



static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
				int val)
{
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);

	clk_enable(nmk_chip->clk);

	__nmk_gpio_set_output(nmk_chip, offset, val);

	clk_disable(nmk_chip->clk);
}

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rabin vincent
26
52.00%
3
60.00%
alessandro rubini
alessandro rubini
23
46.00%
1
20.00%
linus walleij
linus walleij
1
2.00%
1
20.00%
Total
50
100.00%
5
100.00%



static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
				int val)
{
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);

	clk_enable(nmk_chip->clk);

	__nmk_gpio_make_output(nmk_chip, offset, val);

	clk_disable(nmk_chip->clk);

	return 0;
}

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alessandro rubini
alessandro rubini
28
52.83%
1
20.00%
rabin vincent
rabin vincent
24
45.28%
3
60.00%
linus walleij
linus walleij
1
1.89%
1
20.00%
Total
53
100.00%
5
100.00%

#ifdef CONFIG_DEBUG_FS


static int nmk_gpio_get_mode(struct nmk_gpio_chip *nmk_chip, int offset)
{
	u32 afunc, bfunc;

	clk_enable(nmk_chip->clk);

	afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & BIT(offset);
	bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & BIT(offset);

	clk_disable(nmk_chip->clk);

	return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
}

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100.00%
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82
100.00%
1
100.00%

#include <linux/seq_file.h>



static void nmk_gpio_dbg_show_one(struct seq_file *s,
	struct pinctrl_dev *pctldev, struct gpio_chip *chip,
	unsigned offset, unsigned gpio)
{
	const char *label = gpiochip_is_requested(chip, offset);
	struct nmk_gpio_chip *nmk_chip = gpiochip_get_data(chip);
	int mode;
	bool is_out;
	bool data_out;
	bool pull;
	const char *modes[] = {
		[NMK_GPIO_ALT_GPIO]	= "gpio",
		[NMK_GPIO_ALT_A]	= "altA",
		[NMK_GPIO_ALT_B]	= "altB",
		[NMK_GPIO_ALT_C]	= "altC",
		[NMK_GPIO_ALT_C+1]	= "altC1",
		[NMK_GPIO_ALT_C+2]	= "altC2",
		[NMK_GPIO_ALT_C+3]	= "altC3",
		[NMK_GPIO_ALT_C+4]	= "altC4",
        };
	const char *pulls[] = {
		"none     ",
		"pull down",
		"pull up  ",
        };

	clk_enable(nmk_chip->clk);
	is_out = !!(readl(nmk_chip->addr + NMK_GPIO_DIR) & BIT(offset));
	pull = !(readl(nmk_chip->addr + NMK_GPIO_PDIS) & BIT(offset));
	data_out = !!(readl(nmk_chip->addr + NMK_GPIO_DAT) & BIT(offset));
	mode = nmk_gpio_get_mode(nmk_chip, offset);
	if ((mode == NMK_GPIO_ALT_C) && pctldev)
		mode = nmk_prcm_gpiocr_get_mode(pctldev, gpio);

	if (is_out) {
		seq_printf(s, " gpio-%-3d (%-20.20s) out %s        %s",
			   gpio,
			   label ?: "(none)",
			   data_out ? "hi" : "lo",
			   (mode < 0) ? "unknown" : modes[mode]);
	} else {
		int irq = gpio_to_irq(gpio);
		struct irq_desc	*desc = irq_to_desc(irq);
		int pullidx = 0;
		int val;

		if (pull)
			pullidx = data_out ? 2 : 1;

		seq_printf(s, " gpio-%-3d (%-20.20s) in  %s %s",
			   gpio,
			   label ?: "(none)",
			   pulls[pullidx],
			   (mode < 0) ? "unknown" : modes[mode]);

		val = nmk_gpio_get_input(chip, offset);
		seq_printf(s, " VAL %d", val);

		/*
                 * This races with request_irq(), set_irq_type(),
                 * and set_irq_wake() ... but those are "rare".
                 */
		if (irq > 0 && desc && desc->action) {
			char *trigger;

			if (nmk_chip->edge_rising & BIT(offset))
				trigger = "edge-rising";
			else if (nmk_chip->edge_falling & BIT(offset))
				trigger = "edge-falling";
			else
				trigger = "edge-undefined";

			seq_printf(s, " irq-%d %s%s",
				   irq, trigger,
				   irqd_is_wakeup_set(&desc->irq_data)
				   ? " wakeup" : "");
		}
	}
	clk_disable(nmk_chip->clk);
}

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56
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static void nmk_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
	unsigned		i;
	unsigned		gpio = chip->base;

	for (i = 0; i < chip->ngpio; i++, gpio++) {
		nmk_gpio_dbg_show_one(s, NULL, chip, i, gpio);
		seq_printf(s, "\n");
	}
}

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#else


static inline void nmk_gpio_dbg_show_one(struct seq_file *s,
					 struct pinctrl_dev *pctldev,
					 struct gpio_chip *chip,
					 unsigned offset, unsigned gpio)
{
}
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#define nmk_gpio_dbg_show	NULL
#endif



void nmk_gpio_clocks_enable(void)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];

		if (!chip)
			continue;

		clk_enable(chip->clk);
	}
}

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void nmk_gpio_clocks_disable(void)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];

		if (!chip)
			continue;

		clk_disable(chip->clk);
	}
}

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/*
 * Called from the suspend/resume path to only keep the real wakeup interrupts
 * (those that have had set_irq_wake() called on them) as wakeup interrupts,
 * and not the rest of the interrupts which we needed to have as wakeups for
 * cpuidle.
 *
 * PM ops are not used since this needs to be done at the end, after all the
 * other drivers are done with their suspend callbacks.
 */


void nmk_gpio_wakeups_suspend(void)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];

		if (!chip)
			break;

		clk_enable(chip->clk);

		writel(chip->rwimsc & chip->real_wake,
		       chip->addr + NMK_GPIO_RWIMSC);
		writel(chip->fwimsc & chip->real_wake,
		       chip->addr + NMK_GPIO_FWIMSC);

		clk_disable(chip->clk);
	}
}

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void nmk_gpio_wakeups_resume(void)
{
	int i;

	for (i = 0; i < NUM_BANKS; i++) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[i];

		if (!chip)
			break;

		clk_enable(chip->clk);

		writel(chip->rwimsc, chip->addr + NMK_GPIO_RWIMSC);
		writel(chip->fwimsc, chip->addr + NMK_GPIO_FWIMSC);

		clk_disable(chip->clk);
	}
}

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/*
 * Read the pull up/pull down status.
 * A bit set in 'pull_up' means that pull up
 * is selected if pull is enabled in PDIS register.
 * Note: only pull up/down set via this driver can
 * be detected due to HW limitations.
 */


void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up)
{
	if (gpio_bank < NUM_BANKS) {
		struct nmk_gpio_chip *chip = nmk_gpio_chips[gpio_bank];

		if (!chip)
			return;

		*pull_up = chip->pull_up;
	}
}

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/*
 * We will allocate memory for the state container using devm* allocators
 * binding to the first device reaching this point, it doesn't matter if
 * it is the pin controller or GPIO driver. However we need to use the right
 * platform device when looking up resources so pay attention to pdev.
 */


static struct nmk_gpio_chip *nmk_gpio_populate_chip(struct device_node *np,
						struct platform_device *pdev)
{
	struct nmk_gpio_chip *nmk_chip;
	struct platform_device *gpio_pdev;
	struct gpio_chip *chip;
	struct resource *res;
	struct clk *clk;
	void __iomem *base;
	u32 id;

	gpio_pdev = of_find_device_by_node(np);
	if (!gpio_pdev) {
		pr_err("populate \"%s\": device not found\n", np->name);
		return ERR_PTR(-ENODEV);
	}
	if (of_property_read_u32(np, "gpio-bank", &id)) {
		dev_err(&pdev->dev, "populate: gpio-bank property not found\n");
		return ERR_PTR(-EINVAL);
	}

	/* Already populated? */
	nmk_chip = nmk_gpio_chips[id];
	if (nmk_chip)
		return nmk_chip;

	nmk_chip = devm_kzalloc(&pdev->dev, sizeof(*nmk_chip), GFP_KERNEL);
	if (!nmk_chip)
		return ERR_PTR(-ENOMEM);

	nmk_chip->bank = id;
	chip = &nmk_chip->chip;
	chip->base = id * NMK_GPIO_PER_CHIP;
	chip->ngpio = NMK_GPIO_PER_CHIP;
	chip->label = dev_name(&gpio_pdev->dev);
	chip->parent = &gpio_pdev->dev;

	res = platform_get_resource(gpio_pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(base))
		return base;
	nmk_chip->addr = base;

	clk = clk_get(&gpio_pdev->dev, NULL);
	if (IS_ERR(clk))
		return (void *) clk;
	clk_prepare(clk);
	nmk_chip->clk = clk;

	BUG_ON(nmk_chip->bank >= ARRAY_SIZE(nmk_gpio_chips));
	nmk_gpio_chips[id] = nmk_chip;
	return nmk_chip;
}

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alessandro rubini
22
7.26%
1
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julia lawall
10
3.30%
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static int nmk_gpio_probe(struct platform_device *dev)
{
	struct device_node *np = dev->dev.of_node;
	struct nmk_gpio_chip *nmk_chip;
	struct gpio_chip *chip;
	struct irq_chip *irqchip;
	int latent_irq;
	bool supports_sleepmode;
	int irq;
	int ret;

	nmk_chip = nmk_gpio_populate_chip(np, dev);
	if (IS_ERR(nmk_chip)) {
		dev_err(&dev->dev, "could not populate nmk chip struct\n");
		return PTR_ERR(nmk_chip);
	}

	if (of_get_property(np, "st,supports-sleepmode", NULL))
		supports_sleepmode = true;
	else
		supports_sleepmode = false;

	/* Correct platform device ID */
	dev->id = nmk_chip->bank;

	irq = platform_get_irq(dev, 0);
	if (irq < 0)
		return irq;

	/* It's OK for this IRQ not to be present */
	latent_irq = platform_get_irq(dev, 1);

	/*
         * The virt address in nmk_chip->addr is in the nomadik register space,
         * so we can simply convert the resource address, without remapping
         */
	nmk_chip->parent_irq = irq;
	nmk_chip->latent_parent_irq = latent_irq;
	nmk_chip->sleepmode = supports_sleepmode;
	spin_lock_init(&nmk_chip->lock);

	chip = &nmk_chip->chip;
	chip->request = gpiochip_generic_request;
	chip->free = gpiochip_generic_free;
	chip->get_direction = nmk_gpio_get_dir;
	chip->direction_input = nmk_gpio_make_input;
	chip->get = nmk_gpio_get_input;
	chip->direction_output = nmk_gpio_make_output;
	chip->set = nmk_gpio_set_output;
	chip->dbg_show = nmk_gpio_dbg_show;
	chip->can_sleep = false;
	chip->owner = THIS_MODULE;

	irqchip = &nmk_chip->irqchip;
	irqchip->irq_ack = nmk_gpio_irq_ack;
	irqchip->irq_mask = nmk_gpio_irq_mask;
	irqchip->irq_unmask = nmk_gpio_irq_unmask;
	irqchip->irq_set_type = nmk_gpio_irq_set_type;
	irqchip->irq_set_wake = nmk_gpio_irq_set_wake;
	irqchip->irq_startup = nmk_gpio_irq_startup;
	irqchip->irq_shutdown = nmk_gpio_irq_shutdown;
	irqchip->flags = IRQCHIP_MASK_ON_SUSPEND;
	irqchip->name = kasprintf(GFP_KERNEL, "nmk%u-%u-%u",
				  dev->id,
				  chip->base,
				  chip->base + chip->ngpio - 1);

	clk_enable(nmk_chip->clk);
	nmk_chip->lowemi = readl_relaxed(nmk_chip->addr + NMK_GPIO_LOWEMI);
	clk_disable(nmk_chip->clk);
	chip->of_node = np;

	ret = gpiochip_add_data(chip, nmk_chip);
	if (ret)
		return ret;

	platform_set_drvdata(dev, nmk_chip);

	/*
         * Let the generic code handle this edge IRQ, the the chained
         * handler will perform the actual work of handling the parent
         * interrupt.
         */
	ret = gpiochip_irqchip_add(chip,
				   irqchip,
				   0,
				   handle_edge_irq,
				   IRQ_TYPE_EDGE_FALLING);
	if (ret) {
		dev_err(&dev->dev, "could not add irqchip\n");
		gpiochip_remove(&nmk_chip->chip);
		return -ENODEV;
	}
	/* Then register the chain on the parent IRQ */
	gpiochip_set_chained_irqchip(chip,
				     irqchip,
				     nmk_chip->parent_irq,
				     nmk_gpio_irq_handler);
	if (nmk_chip->latent_parent_irq > 0)
		gpiochip_set_chained_irqchip(chip,
					     irqchip,
					     nmk_chip->latent_parent_irq,
					     nmk_gpio_latent_irq_handler);

	dev_info(&dev->dev, "at address %p\n", nmk_chip->addr);

	return 0;
}

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jonas gorski
2
0.43%
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static int nmk_get_groups_cnt(struct pinctrl_dev *pctldev)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	return npct->soc->ngroups;
}

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static const char *nmk_get_group_name(struct pinctrl_dev *pctldev,
				       unsigned selector)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	return npct->soc->groups[selector].name;
}

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static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
			      const unsigned **pins,
			      unsigned *num_pins)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	*pins = npct->soc->groups[selector].pins;
	*num_pins = npct->soc->groups[selector].npins;
	return 0;
}

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static struct nmk_gpio_chip *find_nmk_gpio_from_pin(unsigned pin)
{
	int i;
	struct nmk_gpio_chip *nmk_gpio;

	for(i = 0; i < NMK_MAX_BANKS; i++) {
		nmk_gpio = nmk_gpio_chips[i];
		if (!nmk_gpio)
			continue;
		if (pin >= nmk_gpio->chip.base &&
			pin < nmk_gpio->chip.base + nmk_gpio->chip.ngpio)
			return nmk_gpio;
	}
	return NULL;
}

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static struct gpio_chip *find_gc_from_pin(unsigned pin)
{
	struct nmk_gpio_chip *nmk_gpio = find_nmk_gpio_from_pin(pin);

	if (nmk_gpio)
		return &nmk_gpio->chip;
	return NULL;
}

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static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
		   unsigned offset)
{
	struct gpio_chip *chip = find_gc_from_pin(offset);

	if (!chip) {
		seq_printf(s, "invalid pin offset");
		return;
	}
	nmk_gpio_dbg_show_one(s, pctldev, chip, offset - chip->base, offset);
}

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static int nmk_dt_add_map_mux(struct pinctrl_map **map, unsigned *reserved_maps,
		unsigned *num_maps, const char *group,
		const char *function)
{
	if (*num_maps == *reserved_maps)
		return -ENOSPC;

	(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
	(*map)[*num_maps].data.mux.group = group;
	(*map)[*num_maps].data.mux.function = function;
	(*num_maps)++;

	return 0;
}

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static int nmk_dt_add_map_configs(struct pinctrl_map **map,
		unsigned *reserved_maps,
		unsigned *num_maps, const char *group,
		unsigned long *configs, unsigned num_configs)
{
	unsigned long *dup_configs;

	if (*num_maps == *reserved_maps)
		return -ENOSPC;

	dup_configs = kmemdup(configs, num_configs * sizeof(*dup_configs),
			      GFP_KERNEL);
	if (!dup_configs)
		return -ENOMEM;

	(*map)[*num_maps].type = PIN_MAP_TYPE_CONFIGS_PIN;

	(*map)[*num_maps].data.configs.group_or_pin = group;
	(*map)[*num_maps].data.configs.configs = dup_configs;
	(*map)[*num_maps].data.configs.num_configs = num_configs;
	(*num_maps)++;

	return 0;
}

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#define NMK_CONFIG_PIN(x, y) { .property = x, .config = y, }

#define NMK_CONFIG_PIN_ARRAY(x, y) { .property = x, .choice = y, \
        .size = ARRAY_SIZE(y), }


static const unsigned long nmk_pin_input_modes[] = {
	PIN_INPUT_NOPULL,
	PIN_INPUT_PULLUP,
	PIN_INPUT_PULLDOWN,
};


static const unsigned long nmk_pin_output_modes[] = {
	PIN_OUTPUT_LOW,
	PIN_OUTPUT_HIGH,
	PIN_DIR_OUTPUT,
};


static const unsigned long nmk_pin_sleep_modes[] = {
	PIN_SLEEPMODE_DISABLED,
	PIN_SLEEPMODE_ENABLED,
};


static const unsigned long nmk_pin_sleep_input_modes[] = {
	PIN_SLPM_INPUT_NOPULL,
	PIN_SLPM_INPUT_PULLUP,
	PIN_SLPM_INPUT_PULLDOWN,
	PIN_SLPM_DIR_INPUT,
};


static const unsigned long nmk_pin_sleep_output_modes[] = {
	PIN_SLPM_OUTPUT_LOW,
	PIN_SLPM_OUTPUT_HIGH,
	PIN_SLPM_DIR_OUTPUT,
};


static const unsigned long nmk_pin_sleep_wakeup_modes[] = {
	PIN_SLPM_WAKEUP_DISABLE,
	PIN_SLPM_WAKEUP_ENABLE,
};


static const unsigned long nmk_pin_gpio_modes[] = {
	PIN_GPIOMODE_DISABLED,
	PIN_GPIOMODE_ENABLED,
};


static const unsigned long nmk_pin_sleep_pdis_modes[] = {
	PIN_SLPM_PDIS_DISABLED,
	PIN_SLPM_PDIS_ENABLED,
};


struct nmk_cfg_param {
	
const char *property;
	
unsigned long config;
	
const unsigned long *choice;
	
int size;
};


static const struct nmk_cfg_param nmk_cfg_params[] = {
	NMK_CONFIG_PIN_ARRAY("ste,input",		nmk_pin_input_modes),
	NMK_CONFIG_PIN_ARRAY("ste,output",		nmk_pin_output_modes),
	NMK_CONFIG_PIN_ARRAY("ste,sleep",		nmk_pin_sleep_modes),
	NMK_CONFIG_PIN_ARRAY("ste,sleep-input",		nmk_pin_sleep_input_modes),
	NMK_CONFIG_PIN_ARRAY("ste,sleep-output",	nmk_pin_sleep_output_modes),
	NMK_CONFIG_PIN_ARRAY("ste,sleep-wakeup",	nmk_pin_sleep_wakeup_modes),
	NMK_CONFIG_PIN_ARRAY("ste,gpio",		nmk_pin_gpio_modes),
	NMK_CONFIG_PIN_ARRAY("ste,sleep-pull-disable",	nmk_pin_sleep_pdis_modes),
};



static int nmk_dt_pin_config(int index, int val, unsigned long *config)
{
	int ret = 0;

	if (nmk_cfg_params[index].choice == NULL)
		*config = nmk_cfg_params[index].config;
	else {
		/* test if out of range */
		if  (val < nmk_cfg_params[index].size) {
			*config = nmk_cfg_params[index].config |
				nmk_cfg_params[index].choice[val];
		}
	}
	return ret;
}

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static const char *nmk_find_pin_name(struct pinctrl_dev *pctldev, const char *pin_name)
{
	int i, pin_number;
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	if (sscanf((char *)pin_name, "GPIO%d", &pin_number) == 1)
		for (i = 0; i < npct->soc->npins; i++)
			if (npct->soc->pins[i].number == pin_number)
				return npct->soc->pins[i].name;
	return NULL;
}

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static bool nmk_pinctrl_dt_get_config(struct device_node *np,
		unsigned long *configs)
{
	bool has_config = 0;
	unsigned long cfg = 0;
	int i, val, ret;

	for (i = 0; i < ARRAY_SIZE(nmk_cfg_params); i++) {
		ret = of_property_read_u32(np,
				nmk_cfg_params[i].property, &val);
		if (ret != -EINVAL) {
			if (nmk_dt_pin_config(i, val, &cfg) == 0) {
				*configs |= cfg;
				has_config = 1;
			}
		}
	}

	return has_config;
}

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static int nmk_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
		struct device_node *np,
		struct pinctrl_map **map,
		unsigned *reserved_maps,
		unsigned *num_maps)
{
	int ret;
	const char *function = NULL;
	unsigned long configs = 0;
	bool has_config = 0;
	struct property *prop;
	struct device_node *np_config;

	ret = of_property_read_string(np, "function", &function);
	if (ret >= 0) {
		const char *group;

		ret = of_property_count_strings(np, "groups");
		if (ret < 0)
			goto exit;

		ret = pinctrl_utils_reserve_map(pctldev, map,
						reserved_maps,
						num_maps, ret);
		if (ret < 0)
			goto exit;

		of_property_for_each_string(np, "groups", prop, group) {
			ret = nmk_dt_add_map_mux(map, reserved_maps, num_maps,
					  group, function);
			if (ret < 0)
				goto exit;
		}
	}

	has_config = nmk_pinctrl_dt_get_config(np, &configs);
	np_config = of_parse_phandle(np, "ste,config", 0);
	if (np_config)
		has_config |= nmk_pinctrl_dt_get_config(np_config, &configs);
	if (has_config) {
		const char *gpio_name;
		const char *pin;

		ret = of_property_count_strings(np, "pins");
		if (ret < 0)
			goto exit;
		ret = pinctrl_utils_reserve_map(pctldev, map,
						reserved_maps,
						num_maps, ret);
		if (ret < 0)
			goto exit;

		of_property_for_each_string(np, "pins", prop, pin) {
			gpio_name = nmk_find_pin_name(pctldev, pin);

			ret = nmk_dt_add_map_configs(map, reserved_maps,
						     num_maps,
						     gpio_name, &configs, 1);
			if (ret < 0)
				goto exit;
		}
	}

exit:
	return ret;
}

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107
34.52%
4
66.67%
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sachin kamat
1
0.32%
1
16.67%
Total
310
100.00%
6
100.00%



static int nmk_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
				 struct device_node *np_config,
				 struct pinctrl_map **map, unsigned *num_maps)
{
	unsigned reserved_maps;
	struct device_node *np;
	int ret;

	reserved_maps = 0;
	*map = NULL;
	*num_maps = 0;

	for_each_child_of_node(np_config, np) {
		ret = nmk_pinctrl_dt_subnode_to_map(pctldev, np, map,
				&reserved_maps, num_maps);
		if (ret < 0) {
			pinctrl_utils_free_map(pctldev, *map, *num_maps);
			return ret;
		}
	}

	return 0;
}

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1
1.00%
1
33.33%
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sachin kamat
1
1.00%
1
33.33%
Total
100
100.00%
3
100.00%


static const struct pinctrl_ops nmk_pinctrl_ops = {
	.get_groups_count = nmk_get_groups_cnt,
	.get_group_name = nmk_get_group_name,
	.get_group_pins = nmk_get_group_pins,
	.pin_dbg_show = nmk_pin_dbg_show,
	.dt_node_to_map = nmk_pinctrl_dt_node_to_map,
	.dt_free_map = pinctrl_utils_free_map,
};



static int nmk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	return npct->soc->nfunctions;
}

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static const char *nmk_pmx_get_func_name(struct pinctrl_dev *pctldev,
					 unsigned function)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	return npct->soc->functions[function].name;
}

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static int nmk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
				   unsigned function,
				   const char * const **groups,
				   unsigned * const num_groups)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	*groups = npct->soc->functions[function].groups;
	*num_groups = npct->soc->functions[function].ngroups;

	return 0;
}

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static int nmk_pmx_set(struct pinctrl_dev *pctldev, unsigned function,
		       unsigned group)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
	const struct nmk_pingroup *g;
	static unsigned int slpm[NUM_BANKS];
	unsigned long flags = 0;
	bool glitch;
	int ret = -EINVAL;
	int i;

	g = &npct->soc->groups[group];

	if (g->altsetting < 0)
		return -EINVAL;

	dev_dbg(npct->dev, "enable group %s, %u pins\n", g->name, g->npins);

	/*
         * If we're setting altfunc C by setting both AFSLA and AFSLB to 1,
         * we may pass through an undesired state. In this case we take
         * some extra care.
         *
         * Safe sequence used to switch IOs between GPIO and Alternate-C mode:
         *  - Save SLPM registers (since we have a shadow register in the
         *    nmk_chip we're using that as backup)
         *  - Set SLPM=0 for the IOs you want to switch and others to 1
         *  - Configure the GPIO registers for the IOs that are being switched
         *  - Set IOFORCE=1
         *  - Modify the AFLSA/B registers for the IOs that are being switched
         *  - Set IOFORCE=0
         *  - Restore SLPM registers
         *  - Any spurious wake up event during switch sequence to be ignored
         *    and cleared
         *
         * We REALLY need to save ALL slpm registers, because the external
         * IOFORCE will switch *all* ports to their sleepmode setting to as
         * to avoid glitches. (Not just one port!)
         */
	glitch = ((g->altsetting & NMK_GPIO_ALT_C) == NMK_GPIO_ALT_C);

	if (glitch) {
		spin_lock_irqsave(&nmk_gpio_slpm_lock, flags);

		/* Initially don't put any pins to sleep when switching */
		memset(slpm, 0xff, sizeof(slpm));

		/*
                 * Then mask the pins that need to be sleeping now when we're
                 * switching to the ALT C function.
                 */
		for (i = 0; i < g->npins; i++)
			slpm[g->pins[i] / NMK_GPIO_PER_CHIP] &= ~BIT(g->pins[i]);
		nmk_gpio_glitch_slpm_init(slpm);
	}

	for (i = 0; i < g->npins; i++) {
		struct nmk_gpio_chip *nmk_chip;
		unsigned bit;

		nmk_chip = find_nmk_gpio_from_pin(g->pins[i]);
		if (!nmk_chip) {
			dev_err(npct->dev,
				"invalid pin offset %d in group %s at index %d\n",
				g->pins[i], g->name, i);
			goto out_glitch;
		}
		dev_dbg(npct->dev, "setting pin %d to altsetting %d\n", g->pins[i], g->altsetting);

		clk_enable(nmk_chip->clk);
		bit = g->pins[i] % NMK_GPIO_PER_CHIP;
		/*
                 * If the pin is switching to altfunc, and there was an
                 * interrupt installed on it which has been lazy disabled,
                 * actually mask the interrupt to prevent spurious interrupts
                 * that would occur while the pin is under control of the
                 * peripheral. Only SKE does this.
                 */
		nmk_gpio_disable_lazy_irq(nmk_chip, bit);

		__nmk_gpio_set_mode_safe(nmk_chip, bit,
			(g->altsetting & NMK_GPIO_ALT_C), glitch);
		clk_disable(nmk_chip->clk);

		/*
                 * Call PRCM GPIOCR config function in case ALTC
                 * has been selected:
                 * - If selection is a ALTCx, some bits in PRCM GPIOCR registers
                 *   must be set.
                 * - If selection is pure ALTC and previous selection was ALTCx,
                 *   then some bits in PRCM GPIOCR registers must be cleared.
                 */
		if ((g->altsetting & NMK_GPIO_ALT_C) == NMK_GPIO_ALT_C)
			nmk_prcm_altcx_set_mode(npct, g->pins[i],
				g->altsetting >> NMK_GPIO_ALT_CX_SHIFT);
	}

	/* When all pins are successfully reconfigured we get here */
	ret = 0;

out_glitch:
	if (glitch) {
		nmk_gpio_glitch_slpm_restore(slpm);
		spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags);
	}

	return ret;
}

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10.13%
1
14.29%
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385
100.00%
7
100.00%



static int nmk_gpio_request_enable(struct pinctrl_dev *pctldev,
				   struct pinctrl_gpio_range *range,
				   unsigned offset)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
	struct nmk_gpio_chip *nmk_chip;
	struct gpio_chip *chip;
	unsigned bit;

	if (!range) {
		dev_err(npct->dev, "invalid range\n");
		return -EINVAL;
	}
	if (!range->gc) {
		dev_err(npct->dev, "missing GPIO chip in range\n");
		return -EINVAL;
	}
	chip = range->gc;
	nmk_chip = gpiochip_get_data(chip);

	dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);

	clk_enable(nmk_chip->clk);
	bit = offset % NMK_GPIO_PER_CHIP;
	/* There is no glitch when converting any pin to GPIO */
	__nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
	clk_disable(nmk_chip->clk);

	return 0;
}

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static void nmk_gpio_disable_free(struct pinctrl_dev *pctldev,
				  struct pinctrl_gpio_range *range,
				  unsigned offset)
{
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);

	dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset);
	/* Set the pin to some default state, GPIO is usually default */
}

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static const struct pinmux_ops nmk_pinmux_ops = {
	.get_functions_count = nmk_pmx_get_funcs_cnt,
	.get_function_name = nmk_pmx_get_func_name,
	.get_function_groups = nmk_pmx_get_func_groups,
	.set_mux = nmk_pmx_set,
	.gpio_request_enable = nmk_gpio_request_enable,
	.gpio_disable_free = nmk_gpio_disable_free,
	.strict = true,
};



static int nmk_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
			      unsigned long *config)
{
	/* Not implemented */
	return -EINVAL;
}

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static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
			      unsigned long *configs, unsigned num_configs)
{
	static const char *pullnames[] = {
		[NMK_GPIO_PULL_NONE]	= "none",
		[NMK_GPIO_PULL_UP]	= "up",
		[NMK_GPIO_PULL_DOWN]	= "down",
		[3] /* illegal */	= "??"
	};
	static const char *slpmnames[] = {
		[NMK_GPIO_SLPM_INPUT]		= "input/wakeup",
		[NMK_GPIO_SLPM_NOCHANGE]	= "no-change/no-wakeup",
        };
	struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
	struct nmk_gpio_chip *nmk_chip;
	unsigned bit;
	pin_cfg_t cfg;
	int pull, slpm, output, val, i;
	bool lowemi, gpiomode, sleep;

	nmk_chip = find_nmk_gpio_from_pin(pin);
	if (!nmk_chip) {
		dev_err(npct->dev,
			"invalid pin offset %d\n", pin);
		return -EINVAL;
	}

	for (i = 0; i < num_configs; i++) {
		/*
                 * The pin config contains pin number and altfunction fields,
                 * here we just ignore that part. It's being handled by the
                 * framework and pinmux callback respectively.
                 */
		cfg = (pin_cfg_t) configs[i];
		pull = PIN_PULL(cfg);
		slpm = PIN_SLPM(cfg);
		output = PIN_DIR(cfg);
		val = PIN_VAL(cfg);
		lowemi = PIN_LOWEMI(cfg);
		gpiomode = PIN_GPIOMODE(cfg);
		sleep = PIN_SLEEPMODE(cfg);

		if (sleep) {
			int slpm_pull = PIN_SLPM_PULL(cfg);
			int slpm_output = PIN_SLPM_DIR(cfg);
			int slpm_val = PIN_SLPM_VAL(cfg);

			/* All pins go into GPIO mode at sleep */
			gpiomode = true;

			/*
                         * The SLPM_* values are normal values + 1 to allow zero
                         * to mean "same as normal".
                         */
			if (slpm_pull)
				pull = slpm_pull - 1;
			if (slpm_output)
				output = slpm_output - 1;
			if (slpm_val)
				val = slpm_val - 1;

			dev_dbg(nmk_chip->chip.parent,
				"pin %d: sleep pull %s, dir %s, val %s\n",
				pin,
				slpm_pull ? pullnames[pull] : "same",
				slpm_output ? (output ? "output" : "input")
				: "same",
				slpm_val ? (val ? "high" : "low") : "same");
		}

		dev_dbg(nmk_chip->chip.parent,
			"pin %d [%#lx]: pull %s, slpm %s (%s%s), lowemi %s\n",
			pin, cfg, pullnames[pull], slpmnames[slpm],
			output ? "output " : "input",
			output ? (val ? "high" : "low") : "",
			lowemi ? "on" : "off");

		clk_enable(nmk_chip->clk);
		bit = pin % NMK_GPIO_PER_CHIP;
		if (gpiomode)
			/* No glitch when going to GPIO mode */
			__nmk_gpio_set_mode(nmk_chip, bit, NMK_GPIO_ALT_GPIO);
		if (output)
			__nmk_gpio_make_output(nmk_chip, bit, val);
		else {
			__nmk_gpio_make_input(nmk_chip, bit);
			__nmk_gpio_set_pull(nmk_chip, bit, pull);
		}
		/* TODO: isn't this only applicable on output pins? */
		__nmk_gpio_set_lowemi(nmk_chip, bit, lowemi);

		__nmk_gpio_set_slpm(nmk_chip, bit, slpm);
		clk_disable(nmk_chip->clk);
	} /* for each config */

	return 0;
}

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470
100.00%
6
100.00%


static const struct pinconf_ops nmk_pinconf_ops = {
	.pin_config_get = nmk_pin_config_get,
	.pin_config_set = nmk_pin_config_set,
};


static struct pinctrl_desc nmk_pinctrl_desc = {
	.name = "pinctrl-nomadik",
	.pctlops = &nmk_pinctrl_ops,
	.pmxops = &nmk_pinmux_ops,
	.confops = &nmk_pinconf_ops,
	.owner = THIS_MODULE,
};


static const struct of_device_id nmk_pinctrl_match[] = {
	{
		.compatible = "stericsson,stn8815-pinctrl",
		.data = (void *)PINCTRL_NMK_STN8815,
        },
	{
		.compatible = "stericsson,db8500-pinctrl",
		.data = (void *)PINCTRL_NMK_DB8500,
        },
	{
		.compatible = "stericsson,db8540-pinctrl",
		.data = (void *)PINCTRL_NMK_DB8540,
        },
	{},
};

#ifdef CONFIG_PM_SLEEP


static int nmk_pinctrl_suspend(struct device *dev)
{
	struct nmk_pinctrl *npct;

	npct = dev_get_drvdata(dev);
	if (!npct)
		return -EINVAL;

	return pinctrl_force_sleep(npct->pctl);
}

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static int nmk_pinctrl_resume(struct device *dev)
{
	struct nmk_pinctrl *npct;

	npct = dev_get_drvdata(dev);
	if (!npct)
		return -EINVAL;

	return pinctrl_force_default(npct->pctl);
}
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#endif



static int nmk_pinctrl_probe(struct platform_device *pdev)
{
	const struct of_device_id *match;
	struct device_node *np = pdev->dev.of_node;
	struct device_node *prcm_np;
	struct nmk_pinctrl *npct;
	unsigned int version = 0;
	int i;

	npct = devm_kzalloc(&pdev->dev, sizeof(*npct), GFP_KERNEL);
	if (!npct)
		return -ENOMEM;

	match = of_match_device(nmk_pinctrl_match, &pdev->dev);
	if (!match)
		return -ENODEV;
	version = (unsigned int) match->data;

	/* Poke in other ASIC variants here */
	if (version == PINCTRL_NMK_STN8815)
		nmk_pinctrl_stn8815_init(&npct->soc);
	if (version == PINCTRL_NMK_DB8500)
		nmk_pinctrl_db8500_init(&npct->soc);
	if (version == PINCTRL_NMK_DB8540)
		nmk_pinctrl_db8540_init(&npct->soc);

	/*
         * Since we depend on the GPIO chips to provide clock and register base
         * for the pin control operations, make sure that we have these
         * populated before we continue. Follow the phandles to instantiate
         * them. The GPIO portion of the actual hardware may be probed before
         * or after this point: it shouldn't matter as the APIs are orthogonal.
         */
	for (i = 0; i < NMK_MAX_BANKS; i++) {
		struct device_node *gpio_np;
		struct nmk_gpio_chip *nmk_chip;

		gpio_np = of_parse_phandle(np, "nomadik-gpio-chips", i);
		if (gpio_np) {
			dev_info(&pdev->dev,
				 "populate NMK GPIO %d \"%s\"\n",
				 i, gpio_np->name);
			nmk_chip = nmk_gpio_populate_chip(gpio_np, pdev);
			if (IS_ERR(nmk_chip))
				dev_err(&pdev->dev,
					"could not populate nmk chip struct "
					"- continue anyway\n");
			of_node_put(gpio_np);
		}
	}

	prcm_np = of_parse_phandle(np, "prcm", 0);
	if (prcm_np)
		npct->prcm_base = of_iomap(prcm_np, 0);
	if (!npct->prcm_base) {
		if (version == PINCTRL_NMK_STN8815) {
			dev_info(&pdev->dev,
				 "No PRCM base, "
				 "assuming no ALT-Cx control is available\n");
		} else {
			dev_err(&pdev->dev, "missing PRCM base address\n");
			return -EINVAL;
		}
	}

	nmk_pinctrl_desc.pins = npct->soc->pins;
	nmk_pinctrl_desc.npins = npct->soc->npins;
	npct->dev = &pdev->dev;

	npct->pctl = devm_pinctrl_register(&pdev->dev, &nmk_pinctrl_desc, npct);
	if (IS_ERR(npct->pctl)) {
		dev_err(&pdev->dev, "could not register Nomadik pinctrl driver\n");
		return PTR_ERR(npct->pctl);
	}

	platform_set_drvdata(pdev, npct);
	dev_info(&pdev->dev, "initialized Nomadik pin control driver\n");

	return 0;
}

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68
16.79%
2
16.67%
fabio baltieri
fabio baltieri
23
5.68%
1
8.33%
jonas aberg
jonas aberg
19
4.69%
1
8.33%
axel lin
axel lin
18
4.44%
1
8.33%
patrice chotard
patrice chotard
14
3.46%
1
8.33%
masahiro yamada
masahiro yamada
9
2.22%
1
8.33%
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4
0.99%
1
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405
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12
100.00%


static const struct of_device_id nmk_gpio_match[] = {
	{ .compatible = "st,nomadik-gpio", },
	{}
};


static struct platform_driver nmk_gpio_driver = {
	.driver = {
		.name = "gpio",
		.of_match_table = nmk_gpio_match,
        },
	.probe = nmk_gpio_probe,
};

static SIMPLE_DEV_PM_OPS(nmk_pinctrl_pm_ops,
			nmk_pinctrl_suspend,
			nmk_pinctrl_resume);


static struct platform_driver nmk_pinctrl_driver = {
	.driver = {
		.name = "pinctrl-nomadik",
		.of_match_table = nmk_pinctrl_match,
		.pm = &nmk_pinctrl_pm_ops,
        },
	.probe = nmk_pinctrl_probe,
};



static int __init nmk_gpio_init(void)
{
	return platform_driver_register(&nmk_gpio_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
alessandro rubini
alessandro rubini
12
75.00%
1
25.00%
linus walleij
linus walleij
3
18.75%
2
50.00%
rabin vincent
rabin vincent
1
6.25%
1
25.00%
Total
16
100.00%
4
100.00%


subsys_initcall(nmk_gpio_init);



static int __init nmk_pinctrl_init(void)
{
	return platform_driver_register(&nmk_pinctrl_driver);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
linus walleij
linus walleij
14
87.50%
2
66.67%
alessandro rubini
alessandro rubini
2
12.50%
1
33.33%
Total
16
100.00%
3
100.00%


core_initcall(nmk_pinctrl_init);

MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
MODULE_DESCRIPTION("Nomadik GPIO Driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
linus walleij
linus walleij
3672
40.63%
47
42.34%
rabin vincent
rabin vincent
2094
23.17%
26
23.42%
gabriel fernandez
gabriel fernandez
1100
12.17%
2
1.80%
jean-nicolas graux
jean-nicolas graux
723
8.00%
2
1.80%
alessandro rubini
alessandro rubini
608
6.73%
1
0.90%
lee jones
lee jones
214
2.37%
6
5.41%
jonas aberg
jonas aberg
107
1.18%
2
1.80%
sherman yin
sherman yin
89
0.98%
1
0.90%
arnd bergmann
arnd bergmann
83
0.92%
2
1.80%
julien delacou
julien delacou
75
0.83%
1
0.90%
rickard andersson
rickard andersson
72
0.80%
1
0.90%
fabio baltieri
fabio baltieri
41
0.45%
1
0.90%
lennert buytenhek
lennert buytenhek
36
0.40%
1
0.90%
ulf hansson
ulf hansson
30
0.33%
2
1.80%
axel lin
axel lin
22
0.24%
2
1.80%
patrice chotard
patrice chotard
14
0.15%
1
0.90%
thomas gleixner
thomas gleixner
10
0.11%
1
0.90%
julia lawall
julia lawall
10
0.11%
1
0.90%
masahiro yamada
masahiro yamada
9
0.10%
1
0.90%
will deacon
will deacon
5
0.06%
1
0.90%
thierry reding
thierry reding
5
0.06%
1
0.90%
laxman dewangan
laxman dewangan
4
0.04%
1
0.90%
tejun heo
tejun heo
3
0.03%
1
0.90%
laurent pinchart
laurent pinchart
3
0.03%
1
0.90%
sachin kamat
sachin kamat
2
0.02%
1
0.90%
jonas gorski
jonas gorski
2
0.02%
1
0.90%
irina tirdea
irina tirdea
2
0.02%
1
0.90%
jiang liu
jiang liu
2
0.02%
1
0.90%
grant likely
grant likely
1
0.01%
1
0.90%
Total
9038
100.00%
111
100.00%
  
Directory: drivers/pinctrl/nomadik

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