Release 4.12 drivers/gpio/gpio-lp873x.c
/*
* Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
* Keerthy <j-keerthy@ti.com>
*
* 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.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether expressed or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License version 2 for more details.
*
* Based on the TPS65218 driver
*/
#include <linux/gpio.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/lp873x.h>
#define BITS_PER_GPO 0x4
#define LP873X_GPO_CTRL_OD 0x2
struct lp873x_gpio {
struct gpio_chip chip;
struct lp873x *lp873;
};
static int lp873x_gpio_get_direction(struct gpio_chip *chip,
unsigned int offset)
{
/* This device is output only */
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static int lp873x_gpio_direction_input(struct gpio_chip *chip,
unsigned int offset)
{
/* This device is output only */
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static int lp873x_gpio_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct lp873x_gpio *gpio = gpiochip_get_data(chip);
/* Set the initial value */
return regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
BIT(offset * BITS_PER_GPO),
value ? BIT(offset * BITS_PER_GPO) : 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 59 | 100.00% | 1 | 100.00% |
| Total | 59 | 100.00% | 1 | 100.00% |
static int lp873x_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct lp873x_gpio *gpio = gpiochip_get_data(chip);
int ret, val;
ret = regmap_read(gpio->lp873->regmap, LP873X_REG_GPO_CTRL, &val);
if (ret < 0)
return ret;
return val & BIT(offset * BITS_PER_GPO);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 65 | 100.00% | 1 | 100.00% |
| Total | 65 | 100.00% | 1 | 100.00% |
static void lp873x_gpio_set(struct gpio_chip *chip, unsigned int offset,
int value)
{
struct lp873x_gpio *gpio = gpiochip_get_data(chip);
regmap_update_bits(gpio->lp873->regmap, LP873X_REG_GPO_CTRL,
BIT(offset * BITS_PER_GPO),
value ? BIT(offset * BITS_PER_GPO) : 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 57 | 100.00% | 1 | 100.00% |
| Total | 57 | 100.00% | 1 | 100.00% |
static int lp873x_gpio_request(struct gpio_chip *gc, unsigned int offset)
{
struct lp873x_gpio *gpio = gpiochip_get_data(gc);
int ret;
switch (offset) {
case 0:
/* No MUX Set up Needed for GPO */
break;
case 1:
/* Setup the CLKIN_PIN_SEL MUX to GPO2 */
ret = regmap_update_bits(gpio->lp873->regmap, LP873X_REG_CONFIG,
LP873X_CONFIG_CLKIN_PIN_SEL, 0);
if (ret)
return ret;
break;
default:
return -EINVAL;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 76 | 100.00% | 1 | 100.00% |
| Total | 76 | 100.00% | 1 | 100.00% |
static int lp873x_gpio_set_config(struct gpio_chip *gc, unsigned offset,
unsigned long config)
{
struct lp873x_gpio *gpio = gpiochip_get_data(gc);
switch (pinconf_to_config_param(config)) {
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
return regmap_update_bits(gpio->lp873->regmap,
LP873X_REG_GPO_CTRL,
BIT(offset * BITS_PER_GPO +
LP873X_GPO_CTRL_OD),
BIT(offset * BITS_PER_GPO +
LP873X_GPO_CTRL_OD));
case PIN_CONFIG_DRIVE_PUSH_PULL:
return regmap_update_bits(gpio->lp873->regmap,
LP873X_REG_GPO_CTRL,
BIT(offset * BITS_PER_GPO +
LP873X_GPO_CTRL_OD), 0);
default:
return -ENOTSUPP;
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 91 | 90.10% | 1 | 50.00% |
| Mika Westerberg | 10 | 9.90% | 1 | 50.00% |
| Total | 101 | 100.00% | 2 | 100.00% |
static const struct gpio_chip template_chip = {
.label = "lp873x-gpio",
.owner = THIS_MODULE,
.request = lp873x_gpio_request,
.get_direction = lp873x_gpio_get_direction,
.direction_input = lp873x_gpio_direction_input,
.direction_output = lp873x_gpio_direction_output,
.get = lp873x_gpio_get,
.set = lp873x_gpio_set,
.set_config = lp873x_gpio_set_config,
.base = -1,
.ngpio = 2,
.can_sleep = true,
};
static int lp873x_gpio_probe(struct platform_device *pdev)
{
struct lp873x_gpio *gpio;
int ret;
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
if (!gpio)
return -ENOMEM;
platform_set_drvdata(pdev, gpio);
gpio->lp873 = dev_get_drvdata(pdev->dev.parent);
gpio->chip = template_chip;
gpio->chip.parent = gpio->lp873->dev;
ret = devm_gpiochip_add_data(&pdev->dev, &gpio->chip, gpio);
if (ret < 0) {
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
return ret;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 121 | 95.28% | 1 | 50.00% |
| Wei Yongjun | 6 | 4.72% | 1 | 50.00% |
| Total | 127 | 100.00% | 2 | 100.00% |
static const struct platform_device_id lp873x_gpio_id_table[] = {
{ "lp873x-gpio", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, lp873x_gpio_id_table);
static struct platform_driver lp873x_gpio_driver = {
.driver = {
.name = "lp873x-gpio",
},
.probe = lp873x_gpio_probe,
.id_table = lp873x_gpio_id_table,
};
module_platform_driver(lp873x_gpio_driver);
MODULE_AUTHOR("Keerthy <j-keerthy@ti.com>");
MODULE_DESCRIPTION("LP873X GPIO driver");
MODULE_LICENSE("GPL v2");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| J Keerthy | 683 | 97.29% | 1 | 25.00% |
| Mika Westerberg | 12 | 1.71% | 1 | 25.00% |
| Wei Yongjun | 6 | 0.85% | 1 | 25.00% |
| Julia Lawall | 1 | 0.14% | 1 | 25.00% |
| Total | 702 | 100.00% | 4 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.