mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Michał Mirosław](/assets/img/avatar_default.png)
Use regmap accessors directly for register manipulation - removing one layer of abstraction. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
189 lines
5 KiB
C
189 lines
5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* TI TPS6591x GPIO driver
|
|
*
|
|
* Copyright 2010 Texas Instruments Inc.
|
|
*
|
|
* Author: Graeme Gregory <gg@slimlogic.co.uk>
|
|
* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/gpio/driver.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/mfd/tps65910.h>
|
|
#include <linux/of_device.h>
|
|
|
|
struct tps65910_gpio {
|
|
struct gpio_chip gpio_chip;
|
|
struct tps65910 *tps65910;
|
|
};
|
|
|
|
static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
|
|
struct tps65910 *tps65910 = tps65910_gpio->tps65910;
|
|
unsigned int val;
|
|
|
|
regmap_read(tps65910->regmap, TPS65910_GPIO0 + offset, &val);
|
|
|
|
if (val & GPIO_STS_MASK)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
|
|
int value)
|
|
{
|
|
struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
|
|
struct tps65910 *tps65910 = tps65910_gpio->tps65910;
|
|
|
|
if (value)
|
|
regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
|
|
GPIO_SET_MASK);
|
|
else
|
|
regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
|
|
GPIO_SET_MASK);
|
|
}
|
|
|
|
static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
|
|
int value)
|
|
{
|
|
struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
|
|
struct tps65910 *tps65910 = tps65910_gpio->tps65910;
|
|
|
|
/* Set the initial value */
|
|
tps65910_gpio_set(gc, offset, value);
|
|
|
|
return regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
|
|
GPIO_CFG_MASK);
|
|
}
|
|
|
|
static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
|
|
struct tps65910 *tps65910 = tps65910_gpio->tps65910;
|
|
|
|
return regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
|
|
GPIO_CFG_MASK);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
|
|
struct tps65910 *tps65910, int chip_ngpio)
|
|
{
|
|
struct tps65910_board *tps65910_board = tps65910->of_plat_data;
|
|
unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];
|
|
int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO);
|
|
int ret;
|
|
int idx;
|
|
|
|
tps65910_board->gpio_base = -1;
|
|
ret = of_property_read_u32_array(tps65910->dev->of_node,
|
|
"ti,en-gpio-sleep", prop_array, ngpio);
|
|
if (ret < 0) {
|
|
dev_dbg(dev, "ti,en-gpio-sleep not specified\n");
|
|
return tps65910_board;
|
|
}
|
|
|
|
for (idx = 0; idx < ngpio; idx++)
|
|
tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0);
|
|
|
|
return tps65910_board;
|
|
}
|
|
#else
|
|
static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
|
|
struct tps65910 *tps65910, int chip_ngpio)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
static int tps65910_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
|
|
struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);
|
|
struct tps65910_gpio *tps65910_gpio;
|
|
int ret;
|
|
int i;
|
|
|
|
tps65910_gpio = devm_kzalloc(&pdev->dev,
|
|
sizeof(*tps65910_gpio), GFP_KERNEL);
|
|
if (!tps65910_gpio)
|
|
return -ENOMEM;
|
|
|
|
tps65910_gpio->tps65910 = tps65910;
|
|
|
|
tps65910_gpio->gpio_chip.owner = THIS_MODULE;
|
|
tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;
|
|
|
|
switch (tps65910_chip_id(tps65910)) {
|
|
case TPS65910:
|
|
tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
|
|
break;
|
|
case TPS65911:
|
|
tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
tps65910_gpio->gpio_chip.can_sleep = true;
|
|
tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;
|
|
tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;
|
|
tps65910_gpio->gpio_chip.set = tps65910_gpio_set;
|
|
tps65910_gpio->gpio_chip.get = tps65910_gpio_get;
|
|
tps65910_gpio->gpio_chip.parent = &pdev->dev;
|
|
#ifdef CONFIG_OF_GPIO
|
|
tps65910_gpio->gpio_chip.of_node = tps65910->dev->of_node;
|
|
#endif
|
|
if (pdata && pdata->gpio_base)
|
|
tps65910_gpio->gpio_chip.base = pdata->gpio_base;
|
|
else
|
|
tps65910_gpio->gpio_chip.base = -1;
|
|
|
|
if (!pdata && tps65910->dev->of_node)
|
|
pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910,
|
|
tps65910_gpio->gpio_chip.ngpio);
|
|
|
|
if (!pdata)
|
|
goto skip_init;
|
|
|
|
/* Configure sleep control for gpios if provided */
|
|
for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {
|
|
if (!pdata->en_gpio_sleep[i])
|
|
continue;
|
|
|
|
ret = regmap_set_bits(tps65910->regmap,
|
|
TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
|
|
if (ret < 0)
|
|
dev_warn(tps65910->dev,
|
|
"GPIO Sleep setting failed with err %d\n", ret);
|
|
}
|
|
|
|
skip_init:
|
|
ret = devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip,
|
|
tps65910_gpio);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, tps65910_gpio);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver tps65910_gpio_driver = {
|
|
.driver.name = "tps65910-gpio",
|
|
.probe = tps65910_gpio_probe,
|
|
};
|
|
|
|
static int __init tps65910_gpio_init(void)
|
|
{
|
|
return platform_driver_register(&tps65910_gpio_driver);
|
|
}
|
|
subsys_initcall(tps65910_gpio_init);
|