Release 4.7 drivers/gpio/gpio-da9052.c
/*
* GPIO Driver for Dialog DA9052 PMICs.
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/syscalls.h>
#include <linux/seq_file.h>
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/pdata.h>
#define DA9052_INPUT 1
#define DA9052_OUTPUT_OPENDRAIN 2
#define DA9052_OUTPUT_PUSHPULL 3
#define DA9052_SUPPLY_VDD_IO1 0
#define DA9052_DEBOUNCING_OFF 0
#define DA9052_DEBOUNCING_ON 1
#define DA9052_OUTPUT_LOWLEVEL 0
#define DA9052_ACTIVE_LOW 0
#define DA9052_ACTIVE_HIGH 1
#define DA9052_GPIO_MAX_PORTS_PER_REGISTER 8
#define DA9052_GPIO_SHIFT_COUNT(no) (no%8)
#define DA9052_GPIO_MASK_UPPER_NIBBLE 0xF0
#define DA9052_GPIO_MASK_LOWER_NIBBLE 0x0F
#define DA9052_GPIO_NIBBLE_SHIFT 4
#define DA9052_IRQ_GPI0 16
#define DA9052_GPIO_ODD_SHIFT 7
#define DA9052_GPIO_EVEN_SHIFT 3
struct da9052_gpio {
struct da9052 *da9052;
struct gpio_chip gp;
};
static unsigned char da9052_gpio_port_odd(unsigned offset)
{
return offset % 2;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static int da9052_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct da9052_gpio *gpio = gpiochip_get_data(gc);
int da9052_port_direction = 0;
int ret;
ret = da9052_reg_read(gpio->da9052,
DA9052_GPIO_0_1_REG + (offset >> 1));
if (ret < 0)
return ret;
if (da9052_gpio_port_odd(offset)) {
da9052_port_direction = ret & DA9052_GPIO_ODD_PORT_PIN;
da9052_port_direction >>= 4;
} else {
da9052_port_direction = ret & DA9052_GPIO_EVEN_PORT_PIN;
}
switch (da9052_port_direction) {
case DA9052_INPUT:
if (offset < DA9052_GPIO_MAX_PORTS_PER_REGISTER)
ret = da9052_reg_read(gpio->da9052,
DA9052_STATUS_C_REG);
else
ret = da9052_reg_read(gpio->da9052,
DA9052_STATUS_D_REG);
if (ret < 0)
return ret;
return !!(ret & (1 << DA9052_GPIO_SHIFT_COUNT(offset)));
case DA9052_OUTPUT_PUSHPULL:
if (da9052_gpio_port_odd(offset))
return !!(ret & DA9052_GPIO_ODD_PORT_MODE);
else
return !!(ret & DA9052_GPIO_EVEN_PORT_MODE);
default:
return -EINVAL;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 169 | 92.35% | 1 | 33.33% |
| linus walleij | linus walleij | 14 | 7.65% | 2 | 66.67% |
| Total | 183 | 100.00% | 3 | 100.00% |
static void da9052_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
{
struct da9052_gpio *gpio = gpiochip_get_data(gc);
int ret;
if (da9052_gpio_port_odd(offset)) {
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_ODD_PORT_MODE,
value << DA9052_GPIO_ODD_SHIFT);
if (ret != 0)
dev_err(gpio->da9052->dev,
"Failed to updated gpio odd reg,%d",
ret);
} else {
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_EVEN_PORT_MODE,
value << DA9052_GPIO_EVEN_SHIFT);
if (ret != 0)
dev_err(gpio->da9052->dev,
"Failed to updated gpio even reg,%d",
ret);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 125 | 99.21% | 2 | 66.67% |
| linus walleij | linus walleij | 1 | 0.79% | 1 | 33.33% |
| Total | 126 | 100.00% | 3 | 100.00% |
static int da9052_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
struct da9052_gpio *gpio = gpiochip_get_data(gc);
unsigned char register_value;
int ret;
/* Format: function - 2 bits type - 1 bit mode - 1 bit */
register_value = DA9052_INPUT | DA9052_ACTIVE_LOW << 2 |
DA9052_DEBOUNCING_ON << 3;
if (da9052_gpio_port_odd(offset))
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_MASK_UPPER_NIBBLE,
(register_value <<
DA9052_GPIO_NIBBLE_SHIFT));
else
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_MASK_LOWER_NIBBLE,
register_value);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 100 | 99.01% | 1 | 50.00% |
| linus walleij | linus walleij | 1 | 0.99% | 1 | 50.00% |
| Total | 101 | 100.00% | 2 | 100.00% |
static int da9052_gpio_direction_output(struct gpio_chip *gc,
unsigned offset, int value)
{
struct da9052_gpio *gpio = gpiochip_get_data(gc);
unsigned char register_value;
int ret;
/* Format: Function - 2 bits Type - 1 bit Mode - 1 bit */
register_value = DA9052_OUTPUT_PUSHPULL | DA9052_SUPPLY_VDD_IO1 << 2 |
value << 3;
if (da9052_gpio_port_odd(offset))
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_MASK_UPPER_NIBBLE,
(register_value <<
DA9052_GPIO_NIBBLE_SHIFT));
else
ret = da9052_reg_update(gpio->da9052, (offset >> 1) +
DA9052_GPIO_0_1_REG,
DA9052_GPIO_MASK_LOWER_NIBBLE,
register_value);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 103 | 99.04% | 1 | 50.00% |
| linus walleij | linus walleij | 1 | 0.96% | 1 | 50.00% |
| Total | 104 | 100.00% | 2 | 100.00% |
static int da9052_gpio_to_irq(struct gpio_chip *gc, u32 offset)
{
struct da9052_gpio *gpio = gpiochip_get_data(gc);
struct da9052 *da9052 = gpio->da9052;
int irq;
irq = regmap_irq_get_virq(da9052->irq_data, DA9052_IRQ_GPI0 + offset);
return irq;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 38 | 73.08% | 1 | 33.33% |
| fabio estevam | fabio estevam | 13 | 25.00% | 1 | 33.33% |
| linus walleij | linus walleij | 1 | 1.92% | 1 | 33.33% |
| Total | 52 | 100.00% | 3 | 100.00% |
static struct gpio_chip reference_gp = {
.label = "da9052-gpio",
.owner = THIS_MODULE,
.get = da9052_gpio_get,
.set = da9052_gpio_set,
.direction_input = da9052_gpio_direction_input,
.direction_output = da9052_gpio_direction_output,
.to_irq = da9052_gpio_to_irq,
.can_sleep = true,
.ngpio = 16,
.base = -1,
};
static int da9052_gpio_probe(struct platform_device *pdev)
{
struct da9052_gpio *gpio;
struct da9052_pdata *pdata;
int ret;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
pdata = dev_get_platdata(gpio->da9052->dev);
gpio->gp = reference_gp;
if (pdata && pdata->gpio_base)
gpio->gp.base = pdata->gpio_base;
ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, gpio);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 128 | 85.91% | 1 | 16.67% |
| axel lin | axel lin | 9 | 6.04% | 1 | 16.67% |
| laxman dewangan | laxman dewangan | 6 | 4.03% | 1 | 16.67% |
| jingoo han | jingoo han | 3 | 2.01% | 1 | 16.67% |
| linus walleij | linus walleij | 2 | 1.34% | 1 | 16.67% |
| varka bhadram | varka bhadram | 1 | 0.67% | 1 | 16.67% |
| Total | 149 | 100.00% | 6 | 100.00% |
static struct platform_driver da9052_gpio_driver = {
.probe = da9052_gpio_probe,
.driver = {
.name = "da9052-gpio",
},
};
module_platform_driver(da9052_gpio_driver);
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("DA9052 GPIO Device Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-gpio");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| ashish jangam | ashish jangam | 897 | 94.32% | 2 | 18.18% |
| linus walleij | linus walleij | 21 | 2.21% | 3 | 27.27% |
| fabio estevam | fabio estevam | 13 | 1.37% | 1 | 9.09% |
| axel lin | axel lin | 9 | 0.95% | 1 | 9.09% |
| laxman dewangan | laxman dewangan | 6 | 0.63% | 1 | 9.09% |
| jingoo han | jingoo han | 3 | 0.32% | 1 | 9.09% |
| mark brown | mark brown | 1 | 0.11% | 1 | 9.09% |
| varka bhadram | varka bhadram | 1 | 0.11% | 1 | 9.09% |
| bill pemberton | bill pemberton | | 0.00% | 0 | 0.00% |
| Total | 951 | 100.00% | 11 | 100.00% |
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