From: Alice Guo alice.guo@nxp.com
Add gpio driver for ADP5585 I/O Expander Controller. The ADP5585 is a 10 input/output port expander and can be used to increase the number of I/Os available to a processor.
Signed-off-by: Alice Guo alice.guo@nxp.com ---
Changes for v2: - add a commit log - remove unrelated change - remove "on i.MX platform" in Kconfig file
drivers/gpio/Kconfig | 6 + drivers/gpio/Makefile | 1 + drivers/gpio/adp5585_gpio.c | 238 ++++++++++++++++++++++++++++++++++++ 3 files changed, 245 insertions(+) create mode 100644 drivers/gpio/adp5585_gpio.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index c949f9d2f7..c38022d01c 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -605,4 +605,10 @@ config TURRIS_OMNIA_MCU help Support for GPIOs on MCU connected to Turris Omnia via i2c.
+config ADP5585_GPIO + bool "ADP5585 GPIO driver" + depends on DM_GPIO && DM_I2C + help + Support ADP5585 GPIO expander. + endif diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 9d718a554e..2f60b98384 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -75,3 +75,4 @@ obj-$(CONFIG_SL28CPLD_GPIO) += sl28cpld-gpio.o obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN) += zynqmp_gpio_modepin.o obj-$(CONFIG_SLG7XL45106_I2C_GPO) += gpio_slg7xl45106.o obj-$(CONFIG_$(SPL_TPL_)TURRIS_OMNIA_MCU) += turris_omnia_mcu.o +obj-$(CONFIG_ADP5585_GPIO) += adp5585_gpio.o diff --git a/drivers/gpio/adp5585_gpio.c b/drivers/gpio/adp5585_gpio.c new file mode 100644 index 0000000000..ea0cb75459 --- /dev/null +++ b/drivers/gpio/adp5585_gpio.c @@ -0,0 +1,238 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2022 NXP + * + * ADP5585 I/O Expander Controller + * + * Author: Alice Guo alice.guo@nxp.com + */ + +#include <asm/gpio.h> +#include <dm.h> +#include <dt-bindings/gpio/gpio.h> +#include <i2c.h> + +#define ADP5585_ID 0x00 +#define ADP5585_INT_STATUS 0x01 +#define ADP5585_STATUS 0x02 +#define ADP5585_FIFO_1 0x03 +#define ADP5585_FIFO_2 0x04 +#define ADP5585_FIFO_3 0x05 +#define ADP5585_FIFO_4 0x06 +#define ADP5585_FIFO_5 0x07 +#define ADP5585_FIFO_6 0x08 +#define ADP5585_FIFO_7 0x09 +#define ADP5585_FIFO_8 0x0A +#define ADP5585_FIFO_9 0x0B +#define ADP5585_FIFO_10 0x0C +#define ADP5585_FIFO_11 0x0D +#define ADP5585_FIFO_12 0x0E +#define ADP5585_FIFO_13 0x0F +#define ADP5585_FIFO_14 0x10 +#define ADP5585_FIFO_15 0x11 +#define ADP5585_FIFO_16 0x12 +#define ADP5585_GPI_INT_STAT_A 0x13 +#define ADP5585_GPI_INT_STAT_B 0x14 +#define ADP5585_GPI_STATUS_A 0x15 +#define ADP5585_GPI_STATUS_B 0x16 +#define ADP5585_RPULL_CONFIG_A 0x17 +#define ADP5585_RPULL_CONFIG_B 0x18 +#define ADP5585_RPULL_CONFIG_C 0x19 +#define ADP5585_RPULL_CONFIG_D 0x1A +#define ADP5585_GPI_INT_LEVEL_A 0x1B +#define ADP5585_GPI_INT_LEVEL_B 0x1C +#define ADP5585_GPI_EVENT_EN_A 0x1D +#define ADP5585_GPI_EVENT_EN_B 0x1E +#define ADP5585_GPI_INTERRUPT_EN_A 0x1F +#define ADP5585_GPI_INTERRUPT_EN_B 0x20 +#define ADP5585_DEBOUNCE_DIS_A 0x21 +#define ADP5585_DEBOUNCE_DIS_B 0x22 +#define ADP5585_GPO_DATA_OUT_A 0x23 +#define ADP5585_GPO_DATA_OUT_B 0x24 +#define ADP5585_GPO_OUT_MODE_A 0x25 +#define ADP5585_GPO_OUT_MODE_B 0x26 +#define ADP5585_GPIO_DIRECTION_A 0x27 +#define ADP5585_GPIO_DIRECTION_B 0x28 +#define ADP5585_RESET1_EVENT_A 0x29 +#define ADP5585_RESET1_EVENT_B 0x2A +#define ADP5585_RESET1_EVENT_C 0x2B +#define ADP5585_RESET2_EVENT_A 0x2C +#define ADP5585_RESET2_EVENT_B 0x2D +#define ADP5585_RESET_CFG 0x2E +#define ADP5585_PWM_OFFT_LOW 0x2F +#define ADP5585_PWM_OFFT_HIGH 0x30 +#define ADP5585_PWM_ONT_LOW 0x31 +#define ADP5585_PWM_ONT_HIGH 0x32 +#define ADP5585_PWM_CFG 0x33 +#define ADP5585_LOGIC_CFG 0x34 +#define ADP5585_LOGIC_FF_CFG 0x35 +#define ADP5585_LOGIC_INT_EVENT_EN 0x36 +#define ADP5585_POLL_PTIME_CFG 0x37 +#define ADP5585_PIN_CONFIG_A 0x38 +#define ADP5585_PIN_CONFIG_B 0x39 +#define ADP5585_PIN_CONFIG_D 0x3A +#define ADP5585_GENERAL_CFG 0x3B +#define ADP5585_INT_EN 0x3C + +#define ADP5585_MAXGPIO 10 +#define ADP5585_BANK(offs) ((offs) > 4) +#define ADP5585_BIT(offs) ((offs) > 4 ? \ + 1u << ((offs) - 5) : 1u << (offs)) + +struct adp5585_plat { + fdt_addr_t addr; + u8 id; + u8 dat_out[2]; + u8 dir[2]; +}; + +static int adp5585_direction_input(struct udevice *dev, unsigned int offset) +{ + int ret; + unsigned int bank; + struct adp5585_plat *plat = dev_get_plat(dev); + + bank = ADP5585_BANK(offset); + + plat->dir[bank] &= ~ADP5585_BIT(offset); + ret = dm_i2c_write(dev, ADP5585_GPIO_DIRECTION_A + bank, &plat->dir[bank], 1); + + return ret; +} + +static int adp5585_direction_output(struct udevice *dev, unsigned int offset, + int value) +{ + int ret; + unsigned int bank, bit; + struct adp5585_plat *plat = dev_get_plat(dev); + + bank = ADP5585_BANK(offset); + bit = ADP5585_BIT(offset); + + plat->dir[bank] |= bit; + + if (value) + plat->dat_out[bank] |= bit; + else + plat->dat_out[bank] &= ~bit; + + ret = dm_i2c_write(dev, ADP5585_GPO_DATA_OUT_A + bank, &plat->dat_out[bank], 1); + ret |= dm_i2c_write(dev, ADP5585_GPIO_DIRECTION_A + bank, &plat->dir[bank], 1); + + return ret; +} + +static int adp5585_get_value(struct udevice *dev, unsigned int offset) +{ + struct adp5585_plat *plat = dev_get_plat(dev); + unsigned int bank = ADP5585_BANK(offset); + unsigned int bit = ADP5585_BIT(offset); + u8 val; + + if (plat->dir[bank] & bit) + val = plat->dat_out[bank]; + else + dm_i2c_read(dev, ADP5585_GPI_STATUS_A + bank, &val, 1); + + return !!(val & bit); +} + +static int adp5585_set_value(struct udevice *dev, unsigned int offset, int value) +{ + int ret; + unsigned int bank, bit; + struct adp5585_plat *plat = dev_get_plat(dev); + + bank = ADP5585_BANK(offset); + bit = ADP5585_BIT(offset); + + if (value) + plat->dat_out[bank] |= bit; + else + plat->dat_out[bank] &= ~bit; + + ret = dm_i2c_write(dev, ADP5585_GPO_DATA_OUT_A + bank, &plat->dat_out[bank], 1); + + return ret; +} + +static int adp5585_get_function(struct udevice *dev, unsigned int offset) +{ + unsigned int bank, bit, dir; + struct adp5585_plat *plat = dev_get_plat(dev); + + bank = ADP5585_BANK(offset); + bit = ADP5585_BIT(offset); + dir = plat->dir[bank] & bit; + + if (!dir) + return GPIOF_INPUT; + else + return GPIOF_OUTPUT; +} + +static int adp5585_xlate(struct udevice *dev, struct gpio_desc *desc, + struct ofnode_phandle_args *args) +{ + desc->offset = args->args[0]; + desc->flags = args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0; + + return 0; +} + +static const struct dm_gpio_ops adp5585_ops = { + .direction_input = adp5585_direction_input, + .direction_output = adp5585_direction_output, + .get_value = adp5585_get_value, + .set_value = adp5585_set_value, + .get_function = adp5585_get_function, + .xlate = adp5585_xlate, +}; + +static int adp5585_probe(struct udevice *dev) +{ + struct adp5585_plat *plat = dev_get_plat(dev); + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + int ret; + + if (!plat) + return 0; + + plat->addr = dev_read_addr(dev); + if (plat->addr == FDT_ADDR_T_NONE) + return -EINVAL; + + ret = dm_i2c_read(dev, ADP5585_ID, &plat->id, 1); + if (ret < 0) + return ret; + + uc_priv->gpio_count = ADP5585_MAXGPIO; + uc_priv->bank_name = "adp5585-gpio"; + + for (int i = 0; i < 2; i++) { + ret = dm_i2c_read(dev, ADP5585_GPO_DATA_OUT_A + i, &plat->dat_out[i], 1); + if (ret) + return ret; + + ret = dm_i2c_read(dev, ADP5585_GPIO_DIRECTION_A + i, &plat->dir[i], 1); + if (ret) + return ret; + } + + return 0; +} + +static const struct udevice_id adp5585_ids[] = { + { .compatible = "adp5585" }, + { } +}; + +U_BOOT_DRIVER(adp5585) = { + .name = "adp5585", + .id = UCLASS_GPIO, + .of_match = adp5585_ids, + .probe = adp5585_probe, + .ops = &adp5585_ops, + .plat_auto = sizeof(struct adp5585_plat), +};