| Message ID | 20190201094736.32057-9-brgl@bgdev.pl (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | mfd: add support for max77650 PMIC | expand |
pt., 1 lut 2019 o 10:48 Bartosz Golaszewski <brgl@bgdev.pl> napisał(a): > > From: Bartosz Golaszewski <bgolaszewski@baylibre.com> > > Add GPIO support for max77650 mfd device. This PMIC exposes a single > GPIO line. > > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> > --- > drivers/gpio/Kconfig | 7 ++ > drivers/gpio/Makefile | 1 + > drivers/gpio/gpio-max77650.c | 189 +++++++++++++++++++++++++++++++++++ > 3 files changed, 197 insertions(+) > create mode 100644 drivers/gpio/gpio-max77650.c > > diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig > index b5a2845347ec..fb297fe5bfec 100644 > --- a/drivers/gpio/Kconfig > +++ b/drivers/gpio/Kconfig > @@ -1095,6 +1095,13 @@ config GPIO_MAX77620 > driver also provides interrupt support for each of the gpios. > Say yes here to enable the max77620 to be used as gpio controller. > > +config GPIO_MAX77650 > + tristate "Maxim MAX77650/77651 GPIO support" > + depends on MFD_MAX77650 > + help > + GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor. > + These chips have a single pin that can be configured as GPIO. > + > config GPIO_MSIC > bool "Intel MSIC mixed signal gpio support" > depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC > diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile > index 37628f8dbf70..8bdad50db822 100644 > --- a/drivers/gpio/Makefile > +++ b/drivers/gpio/Makefile > @@ -78,6 +78,7 @@ obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o > obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o > obj-$(CONFIG_GPIO_MAX732X) += gpio-max732x.o > obj-$(CONFIG_GPIO_MAX77620) += gpio-max77620.o > +obj-$(CONFIG_GPIO_MAX77650) += gpio-max77650.o > obj-$(CONFIG_GPIO_MB86S7X) += gpio-mb86s7x.o > obj-$(CONFIG_GPIO_MENZ127) += gpio-menz127.o > obj-$(CONFIG_GPIO_MERRIFIELD) += gpio-merrifield.o > diff --git a/drivers/gpio/gpio-max77650.c b/drivers/gpio/gpio-max77650.c > new file mode 100644 > index 000000000000..8382dd85c548 > --- /dev/null > +++ b/drivers/gpio/gpio-max77650.c > @@ -0,0 +1,189 @@ > +// SPDX-License-Identifier: GPL-2.0 > +// > +// Copyright (C) 2018 BayLibre SAS > +// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com> > +// > +// GPIO driver for MAXIM 77650/77651 charger/power-supply. > + > +#include <linux/gpio/driver.h> > +#include <linux/i2c.h> > +#include <linux/mfd/max77650.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#define MAX77650_GPIO_DIR_MASK BIT(0) > +#define MAX77650_GPIO_INVAL_MASK BIT(1) > +#define MAX77650_GPIO_DRV_MASK BIT(2) > +#define MAX77650_GPIO_OUTVAL_MASK BIT(3) > +#define MAX77650_GPIO_DEBOUNCE_MASK BIT(4) > + > +#define MAX77650_GPIO_DIR_OUT 0x00 > +#define MAX77650_GPIO_DIR_IN BIT(0) > +#define MAX77650_GPIO_OUT_LOW 0x00 > +#define MAX77650_GPIO_OUT_HIGH BIT(3) > +#define MAX77650_GPIO_DRV_OPEN_DRAIN 0x00 > +#define MAX77650_GPIO_DRV_PUSH_PULL BIT(2) > +#define MAX77650_GPIO_DEBOUNCE BIT(4) > + > +#define MAX77650_GPIO_DIR_BITS(_reg) \ > + ((_reg) & MAX77650_GPIO_DIR_MASK) > +#define MAX77650_GPIO_INVAL_BITS(_reg) \ > + (((_reg) & MAX77650_GPIO_INVAL_MASK) >> 1) > + > +struct max77650_gpio_chip { > + struct regmap *map; > + struct gpio_chip gc; > +}; > + > +static int max77650_gpio_direction_input(struct gpio_chip *gc, > + unsigned int offset) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + > + return regmap_update_bits(chip->map, > + MAX77650_REG_CNFG_GPIO, > + MAX77650_GPIO_DIR_MASK, > + MAX77650_GPIO_DIR_IN); > +} > + > +static int max77650_gpio_direction_output(struct gpio_chip *gc, > + unsigned int offset, int value) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + int mask, regval; > + > + mask = MAX77650_GPIO_DIR_MASK | MAX77650_GPIO_OUTVAL_MASK; > + regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW; > + regval |= MAX77650_GPIO_DIR_OUT; > + > + return regmap_update_bits(chip->map, > + MAX77650_REG_CNFG_GPIO, mask, regval); > +} > + > +static void max77650_gpio_set_value(struct gpio_chip *gc, > + unsigned int offset, int value) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + int rv, regval; > + > + regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW; > + > + rv = regmap_update_bits(chip->map, MAX77650_REG_CNFG_GPIO, > + MAX77650_GPIO_OUTVAL_MASK, regval); > + if (rv) > + dev_err(gc->parent, "cannot set GPIO value: %d\n", rv); > +} > + > +static int max77650_gpio_get_value(struct gpio_chip *gc, > + unsigned int offset) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + unsigned int val; > + int rv; > + > + rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val); > + if (rv) > + return rv; > + > + return MAX77650_GPIO_INVAL_BITS(val); > +} > + > +static int max77650_gpio_get_direction(struct gpio_chip *gc, > + unsigned int offset) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + unsigned int val; > + int rv; > + > + rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val); > + if (rv) > + return rv; > + > + return MAX77650_GPIO_DIR_BITS(val); > +} > + > +static int max77650_gpio_set_config(struct gpio_chip *gc, > + unsigned int offset, unsigned long cfg) > +{ > + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); > + > + switch (pinconf_to_config_param(cfg)) { > + case PIN_CONFIG_DRIVE_OPEN_DRAIN: > + return regmap_update_bits(chip->map, > + MAX77650_REG_CNFG_GPIO, > + MAX77650_GPIO_DRV_MASK, > + MAX77650_GPIO_DRV_OPEN_DRAIN); > + case PIN_CONFIG_DRIVE_PUSH_PULL: > + return regmap_update_bits(chip->map, > + MAX77650_REG_CNFG_GPIO, > + MAX77650_GPIO_DRV_MASK, > + MAX77650_GPIO_DRV_PUSH_PULL); > + case PIN_CONFIG_INPUT_DEBOUNCE: > + return regmap_update_bits(chip->map, > + MAX77650_REG_CNFG_GPIO, > + MAX77650_GPIO_DEBOUNCE_MASK, > + MAX77650_GPIO_DEBOUNCE); > + default: > + return -ENOTSUPP; > + } > +} > + > +static int max77650_gpio_to_irq(struct gpio_chip *gc, unsigned int offset) > +{ > + /* > + * TODO Add interrupt support. > + * > + * We first need to properly support hierarchical irqs in gpiolib > + * and regmap irq_chip. > + */ > + return -EOPNOTSUPP; > +} > + > +static int max77650_gpio_probe(struct platform_device *pdev) > +{ > + struct max77650_gpio_chip *chip; > + struct device *dev, *parent; > + struct i2c_client *i2c; > + > + dev = &pdev->dev; > + parent = dev->parent; > + i2c = to_i2c_client(parent); > + > + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); > + if (!chip) > + return -ENOMEM; > + > + chip->map = dev_get_regmap(parent, NULL); > + if (!chip->map) > + return -ENODEV; > + > + chip->gc.base = -1; > + chip->gc.ngpio = 1; > + chip->gc.label = i2c->name; > + chip->gc.parent = dev; > + chip->gc.owner = THIS_MODULE; > + chip->gc.can_sleep = true; > + > + chip->gc.direction_input = max77650_gpio_direction_input; > + chip->gc.direction_output = max77650_gpio_direction_output; > + chip->gc.set = max77650_gpio_set_value; > + chip->gc.get = max77650_gpio_get_value; > + chip->gc.get_direction = max77650_gpio_get_direction; > + chip->gc.set_config = max77650_gpio_set_config; > + chip->gc.to_irq = max77650_gpio_to_irq; > + > + return devm_gpiochip_add_data(dev, &chip->gc, chip); > +} > + > +static struct platform_driver max77650_gpio_driver = { > + .driver = { > + .name = "max77650-gpio", > + }, > + .probe = max77650_gpio_probe, > +}; > +module_platform_driver(max77650_gpio_driver); > + > +MODULE_DESCRIPTION("MAXIM 77650/77651 GPIO driver"); > +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>"); > +MODULE_LICENSE("GPL v2"); > -- > 2.20.1 > I forgot to collect the tag, but Linus left his Reviewed-by:. Bart
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index b5a2845347ec..fb297fe5bfec 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -1095,6 +1095,13 @@ config GPIO_MAX77620 driver also provides interrupt support for each of the gpios. Say yes here to enable the max77620 to be used as gpio controller. +config GPIO_MAX77650 + tristate "Maxim MAX77650/77651 GPIO support" + depends on MFD_MAX77650 + help + GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor. + These chips have a single pin that can be configured as GPIO. + config GPIO_MSIC bool "Intel MSIC mixed signal gpio support" depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 37628f8dbf70..8bdad50db822 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -78,6 +78,7 @@ obj-$(CONFIG_GPIO_MAX7300) += gpio-max7300.o obj-$(CONFIG_GPIO_MAX7301) += gpio-max7301.o obj-$(CONFIG_GPIO_MAX732X) += gpio-max732x.o obj-$(CONFIG_GPIO_MAX77620) += gpio-max77620.o +obj-$(CONFIG_GPIO_MAX77650) += gpio-max77650.o obj-$(CONFIG_GPIO_MB86S7X) += gpio-mb86s7x.o obj-$(CONFIG_GPIO_MENZ127) += gpio-menz127.o obj-$(CONFIG_GPIO_MERRIFIELD) += gpio-merrifield.o diff --git a/drivers/gpio/gpio-max77650.c b/drivers/gpio/gpio-max77650.c new file mode 100644 index 000000000000..8382dd85c548 --- /dev/null +++ b/drivers/gpio/gpio-max77650.c @@ -0,0 +1,189 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (C) 2018 BayLibre SAS +// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com> +// +// GPIO driver for MAXIM 77650/77651 charger/power-supply. + +#include <linux/gpio/driver.h> +#include <linux/i2c.h> +#include <linux/mfd/max77650.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define MAX77650_GPIO_DIR_MASK BIT(0) +#define MAX77650_GPIO_INVAL_MASK BIT(1) +#define MAX77650_GPIO_DRV_MASK BIT(2) +#define MAX77650_GPIO_OUTVAL_MASK BIT(3) +#define MAX77650_GPIO_DEBOUNCE_MASK BIT(4) + +#define MAX77650_GPIO_DIR_OUT 0x00 +#define MAX77650_GPIO_DIR_IN BIT(0) +#define MAX77650_GPIO_OUT_LOW 0x00 +#define MAX77650_GPIO_OUT_HIGH BIT(3) +#define MAX77650_GPIO_DRV_OPEN_DRAIN 0x00 +#define MAX77650_GPIO_DRV_PUSH_PULL BIT(2) +#define MAX77650_GPIO_DEBOUNCE BIT(4) + +#define MAX77650_GPIO_DIR_BITS(_reg) \ + ((_reg) & MAX77650_GPIO_DIR_MASK) +#define MAX77650_GPIO_INVAL_BITS(_reg) \ + (((_reg) & MAX77650_GPIO_INVAL_MASK) >> 1) + +struct max77650_gpio_chip { + struct regmap *map; + struct gpio_chip gc; +}; + +static int max77650_gpio_direction_input(struct gpio_chip *gc, + unsigned int offset) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + + return regmap_update_bits(chip->map, + MAX77650_REG_CNFG_GPIO, + MAX77650_GPIO_DIR_MASK, + MAX77650_GPIO_DIR_IN); +} + +static int max77650_gpio_direction_output(struct gpio_chip *gc, + unsigned int offset, int value) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + int mask, regval; + + mask = MAX77650_GPIO_DIR_MASK | MAX77650_GPIO_OUTVAL_MASK; + regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW; + regval |= MAX77650_GPIO_DIR_OUT; + + return regmap_update_bits(chip->map, + MAX77650_REG_CNFG_GPIO, mask, regval); +} + +static void max77650_gpio_set_value(struct gpio_chip *gc, + unsigned int offset, int value) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + int rv, regval; + + regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW; + + rv = regmap_update_bits(chip->map, MAX77650_REG_CNFG_GPIO, + MAX77650_GPIO_OUTVAL_MASK, regval); + if (rv) + dev_err(gc->parent, "cannot set GPIO value: %d\n", rv); +} + +static int max77650_gpio_get_value(struct gpio_chip *gc, + unsigned int offset) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + unsigned int val; + int rv; + + rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val); + if (rv) + return rv; + + return MAX77650_GPIO_INVAL_BITS(val); +} + +static int max77650_gpio_get_direction(struct gpio_chip *gc, + unsigned int offset) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + unsigned int val; + int rv; + + rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val); + if (rv) + return rv; + + return MAX77650_GPIO_DIR_BITS(val); +} + +static int max77650_gpio_set_config(struct gpio_chip *gc, + unsigned int offset, unsigned long cfg) +{ + struct max77650_gpio_chip *chip = gpiochip_get_data(gc); + + switch (pinconf_to_config_param(cfg)) { + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + return regmap_update_bits(chip->map, + MAX77650_REG_CNFG_GPIO, + MAX77650_GPIO_DRV_MASK, + MAX77650_GPIO_DRV_OPEN_DRAIN); + case PIN_CONFIG_DRIVE_PUSH_PULL: + return regmap_update_bits(chip->map, + MAX77650_REG_CNFG_GPIO, + MAX77650_GPIO_DRV_MASK, + MAX77650_GPIO_DRV_PUSH_PULL); + case PIN_CONFIG_INPUT_DEBOUNCE: + return regmap_update_bits(chip->map, + MAX77650_REG_CNFG_GPIO, + MAX77650_GPIO_DEBOUNCE_MASK, + MAX77650_GPIO_DEBOUNCE); + default: + return -ENOTSUPP; + } +} + +static int max77650_gpio_to_irq(struct gpio_chip *gc, unsigned int offset) +{ + /* + * TODO Add interrupt support. + * + * We first need to properly support hierarchical irqs in gpiolib + * and regmap irq_chip. + */ + return -EOPNOTSUPP; +} + +static int max77650_gpio_probe(struct platform_device *pdev) +{ + struct max77650_gpio_chip *chip; + struct device *dev, *parent; + struct i2c_client *i2c; + + dev = &pdev->dev; + parent = dev->parent; + i2c = to_i2c_client(parent); + + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->map = dev_get_regmap(parent, NULL); + if (!chip->map) + return -ENODEV; + + chip->gc.base = -1; + chip->gc.ngpio = 1; + chip->gc.label = i2c->name; + chip->gc.parent = dev; + chip->gc.owner = THIS_MODULE; + chip->gc.can_sleep = true; + + chip->gc.direction_input = max77650_gpio_direction_input; + chip->gc.direction_output = max77650_gpio_direction_output; + chip->gc.set = max77650_gpio_set_value; + chip->gc.get = max77650_gpio_get_value; + chip->gc.get_direction = max77650_gpio_get_direction; + chip->gc.set_config = max77650_gpio_set_config; + chip->gc.to_irq = max77650_gpio_to_irq; + + return devm_gpiochip_add_data(dev, &chip->gc, chip); +} + +static struct platform_driver max77650_gpio_driver = { + .driver = { + .name = "max77650-gpio", + }, + .probe = max77650_gpio_probe, +}; +module_platform_driver(max77650_gpio_driver); + +MODULE_DESCRIPTION("MAXIM 77650/77651 GPIO driver"); +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>"); +MODULE_LICENSE("GPL v2");