diff options
author | Svyatoslav Ryhel | 2023-07-21 10:50:15 +0300 |
---|---|---|
committer | Svyatoslav Ryhel | 2023-12-19 20:53:53 +0200 |
commit | 52b6bbf162cb88b2c26fe5567eb32e027081407a (patch) | |
tree | 18bc4dbaed71cd2dad21774be36e60433b9fa0cd /drivers/gpio | |
parent | 6b24c372c1e59e461e2f00e09dd1f8da29263450 (diff) |
drivers: gpio: implement PALMAS GPIO cell
Add gpio driver for TI Palmas series PMIC. This has 8 gpio which can
work as input/output.
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Diffstat (limited to 'drivers/gpio')
-rw-r--r-- | drivers/gpio/Kconfig | 7 | ||||
-rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
-rw-r--r-- | drivers/gpio/palmas_gpio.c | 132 |
3 files changed, 140 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 250f1ebbb31..63e62e1acd2 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -435,6 +435,13 @@ config VYBRID_GPIO help Say yes here to support Vybrid vf610 GPIOs. +config PALMAS_GPIO + bool "TI PALMAS series PMICs GPIO" + depends on DM_GPIO && PMIC_PALMAS + help + Select this option to enable GPIO driver for the TI PALMAS + series chip family. + config PIC32_GPIO bool "Microchip PIC32 GPIO driver" depends on DM_GPIO && MACH_PIC32 diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index dab3eb93a3b..da3da5da2b3 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -55,6 +55,7 @@ obj-$(CONFIG_VYBRID_GPIO) += vybrid_gpio.o obj-$(CONFIG_HIKEY_GPIO) += hi6220_gpio.o obj-$(CONFIG_HSDK_CREG_GPIO) += hsdk-creg-gpio.o obj-$(CONFIG_IMX_RGPIO2P) += imx_rgpio2p.o +obj-$(CONFIG_$(SPL_)PALMAS_GPIO) += palmas_gpio.o obj-$(CONFIG_PIC32_GPIO) += pic32_gpio.o obj-$(CONFIG_OCTEON_GPIO) += octeon_gpio.o obj-$(CONFIG_MVEBU_GPIO) += mvebu_gpio.o diff --git a/drivers/gpio/palmas_gpio.c b/drivers/gpio/palmas_gpio.c new file mode 100644 index 00000000000..15039351dd5 --- /dev/null +++ b/drivers/gpio/palmas_gpio.c @@ -0,0 +1,132 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Based on mainline Linux palmas GPIO driver + * Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com> + */ + +#include <dm.h> +#include <i2c.h> +#include <asm/gpio.h> +#include <power/palmas.h> + +#define NUM_GPIOS 8 + +static int palmas_gpio_set_value(struct udevice *dev, unsigned int offset, + int value) +{ + struct palmas_priv *priv = dev_get_priv(dev->parent); + u32 reg; + int ret; + + reg = (value) ? PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT; + + ret = dm_i2c_reg_write(priv->chip2, reg, BIT(offset)); + if (ret < 0) + log_debug("%s: Reg 0x%02x write failed, %d\n", __func__, reg, ret); + + return ret; +} + +static int palmas_gpio_get_value(struct udevice *dev, unsigned int offset) +{ + struct palmas_priv *priv = dev_get_priv(dev->parent); + u32 reg; + int ret; + + ret = dm_i2c_reg_read(priv->chip2, PALMAS_GPIO_DATA_DIR); + if (ret < 0) { + log_debug("%s: GPIO_DATA_DIR read failed, %d\n", __func__, ret); + return ret; + } + + if (ret & BIT(offset)) + reg = PALMAS_GPIO_DATA_OUT; + else + reg = PALMAS_GPIO_DATA_IN; + + ret = dm_i2c_reg_read(priv->chip2, reg); + if (ret < 0) { + log_debug("%s: Reg 0x%02x read failed, %d\n", __func__, reg, ret); + return ret; + } + + return !!(ret & BIT(offset)); +} + +static int palmas_gpio_direction_input(struct udevice *dev, unsigned int offset) +{ + struct palmas_priv *priv = dev_get_priv(dev->parent); + int ret; + + ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_GPIO_DATA_DIR, + BIT(offset), 0); + if (ret < 0) + log_debug("%s: GPIO_DATA_DIR val update failed: %d\n", __func__, ret); + + return ret; +} + +static int palmas_gpio_direction_output(struct udevice *dev, unsigned int offset, + int value) +{ + struct palmas_priv *priv = dev_get_priv(dev->parent); + int ret; + + /* Set the initial value */ + palmas_gpio_set_value(dev, offset, value); + + ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_GPIO_DATA_DIR, + BIT(offset), BIT(offset)); + if (ret < 0) + log_debug("%s: GPIO_DATA_DIR val update failed: %d\n", __func__, ret); + + return ret; +} + +static int palmas_gpio_get_function(struct udevice *dev, unsigned int offset) +{ + struct palmas_priv *priv = dev_get_priv(dev->parent); + int ret; + + ret = dm_i2c_reg_read(priv->chip2, PALMAS_GPIO_DATA_DIR); + if (ret < 0) { + log_debug("%s: GPIO_DATA_DIR read failed, %d\n", __func__, ret); + return ret; + } + + if (ret & BIT(offset)) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + +static const struct dm_gpio_ops palmas_gpio_ops = { + .direction_input = palmas_gpio_direction_input, + .direction_output = palmas_gpio_direction_output, + .get_value = palmas_gpio_get_value, + .set_value = palmas_gpio_set_value, + .get_function = palmas_gpio_get_function, +}; + +static int palmas_gpio_probe(struct udevice *dev) +{ + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + uc_priv->gpio_count = NUM_GPIOS; + uc_priv->bank_name = "GPIO"; + + return 0; +} + +static const struct udevice_id palmas_ids[] = { + { .compatible = "ti,palmas-gpio" }, + { } +}; + +U_BOOT_DRIVER(palmas_gpio) = { + .name = PALMAS_GPIO_DRIVER, + .id = UCLASS_GPIO, + .of_match = palmas_ids, + .probe = palmas_gpio_probe, + .ops = &palmas_gpio_ops, +}; |