| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Linus Walleij | 1959 | 35.21% | 31 | 30.69% |
| Rabin Vincent | 1072 | 19.27% | 16 | 15.84% |
| Gabriel Fernandez | 1034 | 18.58% | 1 | 0.99% |
| Jean-Nicolas Graux | 511 | 9.18% | 2 | 1.98% |
| Théo Lebrun | 249 | 4.48% | 11 | 10.89% |
| Alessandro Rubini | 172 | 3.09% | 2 | 1.98% |
| Lee Jones | 95 | 1.71% | 7 | 6.93% |
| Jonas Aaberg | 92 | 1.65% | 1 | 0.99% |
| Andy Shevchenko | 81 | 1.46% | 3 | 2.97% |
| Sherman Yin | 78 | 1.40% | 1 | 0.99% |
| Julien Delacou | 76 | 1.37% | 1 | 0.99% |
| Ulf Hansson | 30 | 0.54% | 2 | 1.98% |
| Rickard Andersson | 25 | 0.45% | 1 | 0.99% |
| Fabio Baltieri | 14 | 0.25% | 1 | 0.99% |
| Miaoqian Lin | 12 | 0.22% | 2 | 1.98% |
| Masahiro Yamada | 11 | 0.20% | 1 | 0.99% |
| Rob Herring | 10 | 0.18% | 1 | 0.99% |
| Axel Lin | 8 | 0.14% | 2 | 1.98% |
| Patrice Chotard | 7 | 0.13% | 2 | 1.98% |
| Laxman Dewangan | 4 | 0.07% | 1 | 0.99% |
| Laurent Pinchart | 3 | 0.05% | 1 | 0.99% |
| Thierry Reding | 3 | 0.05% | 1 | 0.99% |
| Bartosz Golaszewski | 3 | 0.05% | 1 | 0.99% |
| Nishanth Menon | 3 | 0.05% | 1 | 0.99% |
| Sachin Kamat | 2 | 0.04% | 1 | 0.99% |
| Will Deacon | 2 | 0.04% | 1 | 0.99% |
| Tejun Heo | 2 | 0.04% | 1 | 0.99% |
| Irina Tirdea | 2 | 0.04% | 1 | 0.99% |
| Ding Xiang | 1 | 0.02% | 1 | 0.99% |
| Peng Fan | 1 | 0.02% | 1 | 0.99% |
| Thomas Gleixner | 1 | 0.02% | 1 | 0.99% |
| Arnd Bergmann | 1 | 0.02% | 1 | 0.99% |
| Total | 5564 | 101 |
// SPDX-License-Identifier: GPL-2.0-only /* * Pinmux & pinconf driver for the IP block found in the Nomadik SoC. This * depends on gpio-nomadik and some handling is intertwined; see nmk_gpio_chips * which is used by this driver to access the GPIO banks array. * * 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> */ #include <linux/bitops.h> #include <linux/cleanup.h> #include <linux/clk.h> #include <linux/device.h> #include <linux/err.h> #include <linux/gpio/driver.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/types.h> /* Since we request GPIOs from ourself */ #include <linux/pinctrl/consumer.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> #include "../core.h" #include "../pinctrl-utils.h" #include <linux/gpio/gpio-nomadik.h> /* * 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 */ #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)) /** * 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; }; /* See nmk_gpio_populate_chip() that fills this array. */ struct nmk_gpio_chip *nmk_gpio_chips[NMK_MAX_BANKS]; DEFINE_SPINLOCK(nmk_gpio_slpm_lock); static void __nmk_gpio_set_mode(struct nmk_gpio_chip *nmk_chip, unsigned int 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); } static void __nmk_gpio_set_pull(struct nmk_gpio_chip *nmk_chip, unsigned int 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); } } static void __nmk_gpio_set_lowemi(struct nmk_gpio_chip *nmk_chip, unsigned int 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); } static void __nmk_gpio_make_input(struct nmk_gpio_chip *nmk_chip, unsigned int offset) { writel(BIT(offset), nmk_chip->addr + NMK_GPIO_DIRC); } static void __nmk_gpio_set_mode_safe(struct nmk_gpio_chip *nmk_chip, unsigned int 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); } } static void nmk_gpio_disable_lazy_irq(struct nmk_gpio_chip *nmk_chip, unsigned int 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.irq.domain, 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); } 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); } static void nmk_prcm_altcx_set_mode(struct nmk_pinctrl *npct, unsigned int offset, unsigned int 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) { 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) { 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) { 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)); } /* * 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 < NMK_MAX_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); } } static void nmk_gpio_glitch_slpm_restore(unsigned int *slpm) { int i; for (i = 0; i < NMK_MAX_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); } } /* Only called by gpio-nomadik but requires knowledge of struct nmk_pinctrl. */ 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) { 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; } static int nmk_get_groups_cnt(struct pinctrl_dev *pctldev) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); return npct->soc->ngroups; } static const char *nmk_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); return npct->soc->groups[selector].grp.name; } static int nmk_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, const unsigned int **pins, unsigned int *num_pins) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); *pins = npct->soc->groups[selector].grp.pins; *num_pins = npct->soc->groups[selector].grp.npins; return 0; } /* This makes the mapping from pin number to a GPIO chip. We also return the pin * offset in the GPIO chip for convenience (and to avoid a second loop). */ static struct nmk_gpio_chip *find_nmk_gpio_from_pin(unsigned int pin, unsigned int *offset) { int i, j = 0; struct nmk_gpio_chip *nmk_gpio; /* We assume that pins are allocated in bank order. */ for (i = 0; i < NMK_MAX_BANKS; i++) { nmk_gpio = nmk_gpio_chips[i]; if (!nmk_gpio) continue; if (pin >= j && pin < j + nmk_gpio->chip.ngpio) { if (offset) *offset = pin - j; return nmk_gpio; } j += nmk_gpio->chip.ngpio; } return NULL; } static struct gpio_chip *find_gc_from_pin(unsigned int pin) { struct nmk_gpio_chip *nmk_gpio = find_nmk_gpio_from_pin(pin, NULL); if (nmk_gpio) return &nmk_gpio->chip; return NULL; } static void nmk_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int 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); } static int nmk_dt_add_map_mux(struct pinctrl_map **map, unsigned int *reserved_maps, unsigned int *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; } static int nmk_dt_add_map_configs(struct pinctrl_map **map, unsigned int *reserved_maps, unsigned int *num_maps, const char *group, unsigned long *configs, unsigned int 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; } #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) { if (!nmk_cfg_params[index].choice) { *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 0; } 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; } 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; } static int nmk_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, struct device_node *np, struct pinctrl_map **map, unsigned int *reserved_maps, unsigned int *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); of_node_put(np_config); } 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; } static int nmk_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned int *num_maps) { unsigned int reserved_maps; int ret; reserved_maps = 0; *map = NULL; *num_maps = 0; for_each_child_of_node_scoped(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; } 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; } static const char *nmk_pmx_get_func_name(struct pinctrl_dev *pctldev, unsigned int function) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); return npct->soc->functions[function].name; } static int nmk_pmx_get_func_groups(struct pinctrl_dev *pctldev, unsigned int 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; } static int nmk_pmx_set(struct pinctrl_dev *pctldev, unsigned int function, unsigned int group) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); const struct nmk_pingroup *g; static unsigned int slpm[NMK_MAX_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, %zu pins\n", g->grp.name, g->grp.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->grp.npins; i++) { struct nmk_gpio_chip *nmk_chip; unsigned int bit; nmk_chip = find_nmk_gpio_from_pin(g->grp.pins[i], &bit); if (!nmk_chip) { dev_err(npct->dev, "invalid pin offset %d in group %s at index %d\n", g->grp.pins[i], g->grp.name, i); goto out_pre_slpm_init; } slpm[nmk_chip->bank] &= ~BIT(bit); } nmk_gpio_glitch_slpm_init(slpm); } for (i = 0; i < g->grp.npins; i++) { struct nmk_gpio_chip *nmk_chip; unsigned int bit; nmk_chip = find_nmk_gpio_from_pin(g->grp.pins[i], &bit); if (!nmk_chip) { dev_err(npct->dev, "invalid pin offset %d in group %s at index %d\n", g->grp.pins[i], g->grp.name, i); goto out_glitch; } dev_dbg(npct->dev, "setting pin %d to altsetting %d\n", g->grp.pins[i], g->altsetting); clk_enable(nmk_chip->clk); /* * 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->grp.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); out_pre_slpm_init: if (glitch) spin_unlock_irqrestore(&nmk_gpio_slpm_lock, flags); return ret; } static int nmk_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int pin) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); struct nmk_gpio_chip *nmk_chip; struct gpio_chip *chip; unsigned int 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", pin); find_nmk_gpio_from_pin(pin, &bit); clk_enable(nmk_chip->clk); /* 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; } static void nmk_gpio_disable_free(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int pin) { struct nmk_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); dev_dbg(npct->dev, "disable pin %u as GPIO\n", pin); /* Set the pin to some default state, GPIO is usually default */ } 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 int pin, unsigned long *config) { /* Not implemented */ return -EINVAL; } static int nmk_pin_config_set(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *configs, unsigned int num_configs) { static const char * const pullnames[] = { [NMK_GPIO_PULL_NONE] = "none", [NMK_GPIO_PULL_UP] = "up", [NMK_GPIO_PULL_DOWN] = "down", [3] /* illegal */ = "??" }; static const char * const 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 int bit; unsigned long cfg; int pull, slpm, output, val, i; bool lowemi, gpiomode, sleep; nmk_chip = find_nmk_gpio_from_pin(pin, &bit); 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 = 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); 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; } 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, }, {}, }; #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); } 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); } #endif static int nmk_pinctrl_probe(struct platform_device *pdev) { struct fwnode_handle *fwnode = dev_fwnode(&pdev->dev); struct fwnode_handle *prcm_fwnode; struct nmk_pinctrl *npct; uintptr_t version = 0; int i; npct = devm_kzalloc(&pdev->dev, sizeof(*npct), GFP_KERNEL); if (!npct) return -ENOMEM; version = (uintptr_t)device_get_match_data(&pdev->dev); /* 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); /* * 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 fwnode_handle *gpio_fwnode; struct nmk_gpio_chip *nmk_chip; gpio_fwnode = fwnode_find_reference(fwnode, "nomadik-gpio-chips", i); if (IS_ERR(gpio_fwnode)) continue; dev_info(&pdev->dev, "populate NMK GPIO %d \"%pfwP\"\n", i, gpio_fwnode); nmk_chip = nmk_gpio_populate_chip(gpio_fwnode, pdev); if (IS_ERR(nmk_chip)) dev_err(&pdev->dev, "could not populate nmk chip struct - continue anyway\n"); else /* We are NOT compatible with mobileye,eyeq5-gpio. */ BUG_ON(nmk_chip->is_mobileye_soc); fwnode_handle_put(gpio_fwnode); } prcm_fwnode = fwnode_find_reference(fwnode, "prcm", 0); if (!IS_ERR(prcm_fwnode)) { npct->prcm_base = fwnode_iomap(prcm_fwnode, 0); fwnode_handle_put(prcm_fwnode); } 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; } 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_pinctrl_init(void) { return platform_driver_register(&nmk_pinctrl_driver); } core_initcall(nmk_pinctrl_init);
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