mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 04:34:11 +08:00
e35b5ab0a7
These structures are only used to copy into other structures, so declare them as const. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct gpio_chip i@p = { ... }; @ok@ identifier r.i; expression e; position p; @@ e = i@p; @bad@ position p != {r.p,ok.p}; identifier r.i; struct gpio_chip e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct gpio_chip i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
|
|
* GPIO driver for TI TPS65912x PMICs
|
|
*
|
|
* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Andrew F. Davis <afd@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 Arizona GPIO driver and the previous TPS65912 driver by
|
|
* Margarita Olaya Cabrera <magi@slimlogic.co.uk>
|
|
*/
|
|
|
|
#include <linux/gpio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/mfd/tps65912.h>
|
|
|
|
struct tps65912_gpio {
|
|
struct gpio_chip gpio_chip;
|
|
struct tps65912 *tps;
|
|
};
|
|
|
|
static int tps65912_gpio_get_direction(struct gpio_chip *gc,
|
|
unsigned offset)
|
|
{
|
|
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
|
|
|
|
int ret, val;
|
|
|
|
ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val & GPIO_CFG_MASK)
|
|
return GPIOF_DIR_OUT;
|
|
else
|
|
return GPIOF_DIR_IN;
|
|
}
|
|
|
|
static int tps65912_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
|
|
|
|
return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
|
|
GPIO_CFG_MASK, 0);
|
|
}
|
|
|
|
static int tps65912_gpio_direction_output(struct gpio_chip *gc,
|
|
unsigned offset, int value)
|
|
{
|
|
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
|
|
|
|
/* Set the initial value */
|
|
regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
|
|
GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
|
|
|
|
return regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
|
|
GPIO_CFG_MASK, GPIO_CFG_MASK);
|
|
}
|
|
|
|
static int tps65912_gpio_get(struct gpio_chip *gc, unsigned offset)
|
|
{
|
|
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
|
|
int ret, val;
|
|
|
|
ret = regmap_read(gpio->tps->regmap, TPS65912_GPIO1 + offset, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (val & GPIO_STS_MASK)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tps65912_gpio_set(struct gpio_chip *gc, unsigned offset,
|
|
int value)
|
|
{
|
|
struct tps65912_gpio *gpio = gpiochip_get_data(gc);
|
|
|
|
regmap_update_bits(gpio->tps->regmap, TPS65912_GPIO1 + offset,
|
|
GPIO_SET_MASK, value ? GPIO_SET_MASK : 0);
|
|
}
|
|
|
|
static const struct gpio_chip template_chip = {
|
|
.label = "tps65912-gpio",
|
|
.owner = THIS_MODULE,
|
|
.get_direction = tps65912_gpio_get_direction,
|
|
.direction_input = tps65912_gpio_direction_input,
|
|
.direction_output = tps65912_gpio_direction_output,
|
|
.get = tps65912_gpio_get,
|
|
.set = tps65912_gpio_set,
|
|
.base = -1,
|
|
.ngpio = 5,
|
|
.can_sleep = true,
|
|
};
|
|
|
|
static int tps65912_gpio_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps65912 *tps = dev_get_drvdata(pdev->dev.parent);
|
|
struct tps65912_gpio *gpio;
|
|
int ret;
|
|
|
|
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
|
|
if (!gpio)
|
|
return -ENOMEM;
|
|
|
|
gpio->tps = dev_get_drvdata(pdev->dev.parent);
|
|
gpio->gpio_chip = template_chip;
|
|
gpio->gpio_chip.parent = tps->dev;
|
|
|
|
ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip,
|
|
gpio);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, gpio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id tps65912_gpio_id_table[] = {
|
|
{ "tps65912-gpio", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, tps65912_gpio_id_table);
|
|
|
|
static struct platform_driver tps65912_gpio_driver = {
|
|
.driver = {
|
|
.name = "tps65912-gpio",
|
|
},
|
|
.probe = tps65912_gpio_probe,
|
|
.id_table = tps65912_gpio_id_table,
|
|
};
|
|
module_platform_driver(tps65912_gpio_driver);
|
|
|
|
MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
|
|
MODULE_DESCRIPTION("TPS65912 GPIO driver");
|
|
MODULE_LICENSE("GPL v2");
|