MAXIM Semiconductor's PMIC, MAX77663 has 8 GPIO pins and 3 GPIO-like pins. It also supports interrupts from these pins.
Add GPIO driver for these pins to control via GPIO APIs.
Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com --- drivers/gpio/Kconfig | 9 ++ drivers/gpio/Makefile | 1 + drivers/gpio/max77663_gpio.c | 179 ++++++++++++++++++++++++++++ drivers/power/pmic/max77663.c | 9 ++ include/dt-bindings/pmic/max77663.h | 18 +++ include/power/max77663.h | 1 + 6 files changed, 217 insertions(+) create mode 100644 drivers/gpio/max77663_gpio.c create mode 100644 include/dt-bindings/pmic/max77663.h
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 74baa98d3c..3c701eff5c 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -238,6 +238,15 @@ config MAX7320_GPIO original maxim device has 8 push/pull outputs, some clones offers 16bit.
+config MAX77663_GPIO + bool "MAX77663 GPIO cell of PMIC driver" + depends on DM_GPIO && DM_PMIC_MAX77663 + help + GPIO driver for MAX77663 PMIC from Maxim Semiconductor. + MAX77663 PMIC has 8 pins that can be configured as GPIOs + and 3 GPIO-like pins dedicated for power/reset buttons + and LID sensor. + config MCP230XX_GPIO bool "MCP230XX GPIO driver" depends on DM diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index c8b3fd7814..dab3eb93a3 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -68,6 +68,7 @@ obj-$(CONFIG_NX_GPIO) += nx_gpio.o obj-$(CONFIG_SIFIVE_GPIO) += sifive-gpio.o obj-$(CONFIG_NOMADIK_GPIO) += nmk_gpio.o obj-$(CONFIG_MAX7320_GPIO) += max7320_gpio.o +obj-$(CONFIG_$(SPL_)MAX77663_GPIO) += max77663_gpio.o obj-$(CONFIG_SL28CPLD_GPIO) += sl28cpld-gpio.o obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN) += zynqmp_gpio_modepin.o obj-$(CONFIG_SLG7XL45106_I2C_GPO) += gpio_slg7xl45106.o diff --git a/drivers/gpio/max77663_gpio.c b/drivers/gpio/max77663_gpio.c new file mode 100644 index 0000000000..a377d01739 --- /dev/null +++ b/drivers/gpio/max77663_gpio.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#include <common.h> +#include <dm.h> +#include <asm/gpio.h> +#include <power/max77663.h> +#include <power/pmic.h> + +#define NUM_ENTRIES 11 /* 8 GPIOs + 3 KEYs */ +#define NUM_GPIOS 8 + +#define MAX77663_CNFG1_GPIO 0x36 +#define GPIO_REG_ADDR(offset) (MAX77663_CNFG1_GPIO + (offset)) + +#define MAX77663_CNFG_GPIO_DIR_MASK BIT(1) +#define MAX77663_CNFG_GPIO_DIR_INPUT BIT(1) +#define MAX77663_CNFG_GPIO_DIR_OUTPUT 0 +#define MAX77663_CNFG_GPIO_INPUT_VAL_MASK BIT(2) +#define MAX77663_CNFG_GPIO_OUTPUT_VAL_MASK BIT(3) +#define MAX77663_CNFG_GPIO_OUTPUT_VAL_HIGH BIT(3) +#define MAX77663_CNFG_GPIO_OUTPUT_VAL_LOW 0 +#define MAX77663_CNFG_IRQ GENMASK(5, 4) + +#define MAX77663_ONOFFSTAT_REG 0x15 +#define EN0 BIT(2) /* KEY 2 */ +#define ACOK BIT(1) /* KEY 1 */ +#define LID BIT(0) /* KEY 0 */ + +static int max77663_gpio_direction_input(struct udevice *dev, unsigned int offset) +{ + int ret; + + if (offset >= NUM_GPIOS) + return 0; + + ret = pmic_clrsetbits(dev->parent, GPIO_REG_ADDR(offset), + MAX77663_CNFG_GPIO_DIR_MASK, + MAX77663_CNFG_GPIO_DIR_INPUT); + if (ret < 0) + log_err("CNFG_GPIOx dir update failed: %d\n", ret); + + return ret; +} + +static int max77663_gpio_direction_output(struct udevice *dev, unsigned int offset, + int value) +{ + u8 val; + int ret; + + if (offset >= NUM_GPIOS) + return -EINVAL; + + val = (value) ? MAX77663_CNFG_GPIO_OUTPUT_VAL_HIGH : + MAX77663_CNFG_GPIO_OUTPUT_VAL_LOW; + + ret = pmic_clrsetbits(dev->parent, GPIO_REG_ADDR(offset), + MAX77663_CNFG_GPIO_OUTPUT_VAL_MASK, val); + if (ret < 0) { + log_err("CNFG_GPIOx val update failed: %d\n", ret); + return ret; + } + + ret = pmic_clrsetbits(dev->parent, GPIO_REG_ADDR(offset), + MAX77663_CNFG_GPIO_DIR_MASK, + MAX77663_CNFG_GPIO_DIR_OUTPUT); + if (ret < 0) + log_err("CNFG_GPIOx dir update failed: %d\n", ret); + + return ret; +} + +static int max77663_gpio_get_value(struct udevice *dev, unsigned int offset) +{ + int ret; + + if (offset >= NUM_GPIOS) { + ret = pmic_reg_read(dev->parent, MAX77663_ONOFFSTAT_REG); + if (ret < 0) { + log_err("ONOFFSTAT_REG read failed: %d\n", ret); + return ret; + } + + return !!(ret & BIT(offset - NUM_GPIOS)); + } + + ret = pmic_reg_read(dev->parent, GPIO_REG_ADDR(offset)); + if (ret < 0) { + log_err("CNFG_GPIOx read failed: %d\n", ret); + return ret; + } + + if (ret & MAX77663_CNFG_GPIO_DIR_MASK) + return !!(ret & MAX77663_CNFG_GPIO_INPUT_VAL_MASK); + else + return !!(ret & MAX77663_CNFG_GPIO_OUTPUT_VAL_MASK); +} + +static int max77663_gpio_set_value(struct udevice *dev, unsigned int offset, + int value) +{ + u8 val; + int ret; + + if (offset >= NUM_GPIOS) + return -EINVAL; + + val = (value) ? MAX77663_CNFG_GPIO_OUTPUT_VAL_HIGH : + MAX77663_CNFG_GPIO_OUTPUT_VAL_LOW; + + ret = pmic_clrsetbits(dev->parent, GPIO_REG_ADDR(offset), + MAX77663_CNFG_GPIO_OUTPUT_VAL_MASK, val); + if (ret < 0) + log_err("CNFG_GPIO_OUT update failed: %d\n", ret); + + return ret; +} + +static int max77663_gpio_get_function(struct udevice *dev, unsigned int offset) +{ + int ret; + + if (offset >= NUM_GPIOS) + return GPIOF_INPUT; + + ret = pmic_reg_read(dev->parent, GPIO_REG_ADDR(offset)); + if (ret < 0) { + log_err("CNFG_GPIOx read failed: %d\n", ret); + return ret; + } + + if (ret & MAX77663_CNFG_GPIO_DIR_MASK) + return GPIOF_INPUT; + else + return GPIOF_OUTPUT; +} + +static const struct dm_gpio_ops max77663_gpio_ops = { + .direction_input = max77663_gpio_direction_input, + .direction_output = max77663_gpio_direction_output, + .get_value = max77663_gpio_get_value, + .set_value = max77663_gpio_set_value, + .get_function = max77663_gpio_get_function, +}; + +static int max77663_gpio_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + int i, ret; + + uc_priv->gpio_count = NUM_ENTRIES; + uc_priv->bank_name = "GPIO"; + + /* + * GPIO interrupts may be left ON after bootloader, hence let's + * pre-initialize hardware to the expected state by disabling all + * the interrupts. + */ + for (i = 0; i < NUM_GPIOS; i++) { + ret = pmic_clrsetbits(dev->parent, GPIO_REG_ADDR(i), + MAX77663_CNFG_IRQ, 0); + if (ret < 0) { + log_err("failed to disable interrupt: %d\n", ret); + return ret; + } + } + + return 0; +} + +U_BOOT_DRIVER(max77663_gpio) = { + .name = MAX77663_GPIO_DRIVER, + .id = UCLASS_GPIO, + .probe = max77663_gpio_probe, + .ops = &max77663_gpio_ops, +}; diff --git a/drivers/power/pmic/max77663.c b/drivers/power/pmic/max77663.c index e333c8dcf5..187171bc52 100644 --- a/drivers/power/pmic/max77663.c +++ b/drivers/power/pmic/max77663.c @@ -61,6 +61,15 @@ static int max77663_bind(struct udevice *dev) } }
+ if (IS_ENABLED(CONFIG_MAX77663_GPIO)) { + ret = device_bind_driver(dev, MAX77663_GPIO_DRIVER, + "gpio", NULL); + if (ret) { + log_err("cannot bind GPIOs (ret = %d)\n", ret); + return ret; + } + } + regulators_node = dev_read_subnode(dev, "regulators"); if (!ofnode_valid(regulators_node)) { log_err("%s regulators subnode not found!\n", dev->name); diff --git a/include/dt-bindings/pmic/max77663.h b/include/dt-bindings/pmic/max77663.h new file mode 100644 index 0000000000..ee169a83e3 --- /dev/null +++ b/include/dt-bindings/pmic/max77663.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#ifndef _DT_BINDINGS_MAX77663_H_ +#define _DT_BINDINGS_MAX77663_H_ + +/* + * MAX77663 has 8 GPIO (0 to 7) and 3 KEYS + * KEYS are appended after GPIOs + */ + +#define EN0 10 +#define ACOK 9 +#define LID 8 + +#endif diff --git a/include/power/max77663.h b/include/power/max77663.h index b3ae3dabf4..fcb5916f27 100644 --- a/include/power/max77663.h +++ b/include/power/max77663.h @@ -13,6 +13,7 @@ #define MAX77663_LDO_DRIVER "max77663_ldo" #define MAX77663_SD_DRIVER "max77663_sd" #define MAX77663_RST_DRIVER "max77663_rst" +#define MAX77663_GPIO_DRIVER "max77663_gpio"
/* Step-Down (SD) Regulator calculations */ #define SD_STATUS_MASK 0x30