forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Add driver for lp87565 PMIC family GPIOs. Three GPIOs are supported and can be configured in Open-drain output or Push-pull output. Signed-off-by: Keerthy <[email protected]> Signed-off-by: Linus Walleij <[email protected]>
- v4.18-rc8
- v4.18-rc7
- v4.18-rc6
- v4.18-rc5
- v4.18-rc4
- v4.18-rc3
- v4.18-rc2
- v4.18-rc1
- v4.17
- v4.17-rc7
- v4.17-rc6
- v4.17-rc5
- v4.17-rc4
- v4.17-rc3
- v4.17-rc2
- v4.17-rc1
- v4.16
- v4.16-rc7
- v4.16-rc6
- v4.16-rc5
- v4.16-rc4
- v4.16-rc3
- v4.16-rc2
- v4.16-rc1
- v4.15
- v4.15-rc9
- v4.15-rc8
- v4.15-rc7
- v4.15-rc6
- v4.15-rc5
- v4.15-rc4
- v4.15-rc3
- v4.15-rc2
- v4.15-rc1
- v4.14
- v4.14-rc8
- v4.14-rc7
- v4.14-rc6
- v4.14-rc5
- v4.14-rc4
- v4.14-rc3
- v4.14-rc2
- v4.14-rc1
- v4.13
- v4.13-rc7
- v4.13-rc6
- v4.13-rc5
- v4.13-rc4
- v4.13-rc3
- v4.13-rc2
- v4.13-rc1
Showing
3 changed files
with
201 additions
and
0 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,190 @@ | ||
/* | ||
* Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/ | ||
* Keerthy <[email protected]> | ||
* | ||
* 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 LP873X driver | ||
*/ | ||
|
||
#include <linux/gpio/driver.h> | ||
#include <linux/module.h> | ||
#include <linux/platform_device.h> | ||
#include <linux/regmap.h> | ||
|
||
#include <linux/mfd/lp87565.h> | ||
|
||
struct lp87565_gpio { | ||
struct gpio_chip chip; | ||
struct regmap *map; | ||
}; | ||
|
||
static int lp87565_gpio_get_direction(struct gpio_chip *chip, | ||
unsigned int offset) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(chip); | ||
int ret, val; | ||
|
||
ret = regmap_read(gpio->map, LP87565_REG_GPIO_CONFIG, &val); | ||
if (ret < 0) | ||
return ret; | ||
|
||
return !(val & BIT(offset)); | ||
} | ||
|
||
static int lp87565_gpio_direction_input(struct gpio_chip *chip, | ||
unsigned int offset) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(chip); | ||
|
||
return regmap_update_bits(gpio->map, | ||
LP87565_REG_GPIO_CONFIG, | ||
BIT(offset), 0); | ||
} | ||
|
||
static int lp87565_gpio_direction_output(struct gpio_chip *chip, | ||
unsigned int offset, int value) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(chip); | ||
|
||
return regmap_update_bits(gpio->map, | ||
LP87565_REG_GPIO_CONFIG, | ||
BIT(offset), !value ? BIT(offset) : 0); | ||
} | ||
|
||
static int lp87565_gpio_get(struct gpio_chip *chip, unsigned int offset) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(chip); | ||
int ret, val; | ||
|
||
ret = regmap_read(gpio->map, LP87565_REG_GPIO_IN, &val); | ||
if (ret < 0) | ||
return ret; | ||
|
||
return !!(val & BIT(offset)); | ||
} | ||
|
||
static void lp87565_gpio_set(struct gpio_chip *chip, unsigned int offset, | ||
int value) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(chip); | ||
|
||
regmap_update_bits(gpio->map, LP87565_REG_GPIO_OUT, | ||
BIT(offset), value ? BIT(offset) : 0); | ||
} | ||
|
||
static int lp87565_gpio_request(struct gpio_chip *gc, unsigned int offset) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(gc); | ||
int ret; | ||
|
||
switch (offset) { | ||
case 0: | ||
case 1: | ||
case 2: | ||
/* | ||
* MUX can program the pin to be in EN1/2/3 pin mode | ||
* Or GPIO1/2/3 mode. | ||
* Setup the GPIO*_SEL MUX to GPIO mode | ||
*/ | ||
ret = regmap_update_bits(gpio->map, | ||
LP87565_REG_PIN_FUNCTION, | ||
BIT(offset), BIT(offset)); | ||
if (ret) | ||
return ret; | ||
|
||
break; | ||
default: | ||
return -EINVAL; | ||
} | ||
|
||
return 0; | ||
} | ||
|
||
static int lp87565_gpio_set_config(struct gpio_chip *gc, unsigned int offset, | ||
unsigned long config) | ||
{ | ||
struct lp87565_gpio *gpio = gpiochip_get_data(gc); | ||
|
||
switch (pinconf_to_config_param(config)) { | ||
case PIN_CONFIG_DRIVE_OPEN_DRAIN: | ||
return regmap_update_bits(gpio->map, | ||
LP87565_REG_GPIO_CONFIG, | ||
BIT(offset + | ||
__ffs(LP87565_GOIO1_OD)), | ||
BIT(offset + | ||
__ffs(LP87565_GOIO1_OD))); | ||
case PIN_CONFIG_DRIVE_PUSH_PULL: | ||
return regmap_update_bits(gpio->map, | ||
LP87565_REG_GPIO_CONFIG, | ||
BIT(offset + | ||
__ffs(LP87565_GOIO1_OD)), 0); | ||
default: | ||
return -ENOTSUPP; | ||
} | ||
} | ||
|
||
static const struct gpio_chip template_chip = { | ||
.label = "lp87565-gpio", | ||
.owner = THIS_MODULE, | ||
.request = lp87565_gpio_request, | ||
.get_direction = lp87565_gpio_get_direction, | ||
.direction_input = lp87565_gpio_direction_input, | ||
.direction_output = lp87565_gpio_direction_output, | ||
.get = lp87565_gpio_get, | ||
.set = lp87565_gpio_set, | ||
.set_config = lp87565_gpio_set_config, | ||
.base = -1, | ||
.ngpio = 3, | ||
.can_sleep = true, | ||
}; | ||
|
||
static int lp87565_gpio_probe(struct platform_device *pdev) | ||
{ | ||
struct lp87565_gpio *gpio; | ||
struct lp87565 *lp87565; | ||
int ret; | ||
|
||
gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL); | ||
if (!gpio) | ||
return -ENOMEM; | ||
|
||
lp87565 = dev_get_drvdata(pdev->dev.parent); | ||
gpio->chip = template_chip; | ||
gpio->chip.parent = lp87565->dev; | ||
gpio->map = lp87565->regmap; | ||
|
||
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; | ||
} | ||
|
||
static const struct platform_device_id lp87565_gpio_id_table[] = { | ||
{ "lp87565-q1-gpio", }, | ||
{ /* sentinel */ } | ||
}; | ||
MODULE_DEVICE_TABLE(platform, lp87565_gpio_id_table); | ||
|
||
static struct platform_driver lp87565_gpio_driver = { | ||
.driver = { | ||
.name = "lp87565-gpio", | ||
}, | ||
.probe = lp87565_gpio_probe, | ||
.id_table = lp87565_gpio_id_table, | ||
}; | ||
module_platform_driver(lp87565_gpio_driver); | ||
|
||
MODULE_AUTHOR("Keerthy <[email protected]>"); | ||
MODULE_DESCRIPTION("LP87565 GPIO driver"); | ||
MODULE_LICENSE("GPL v2"); |