From: Nathan Barrett-Morrison nathan.morrison@timesys.com
This adds support for the ADP588 GPIO expander from Analog Devices. It is accessed over I2C and provides up to 18 pins. It is largely a port of the Linux driver developed by Michael Hennerich michael.hennerich@analog.com
Signed-off-by: Ian Roberts ian.roberts@timesys.com Signed-off-by: Greg Malysa greg.malysa@timesys.com Signed-off-by: Vasileios Bimpikas vasileios.bimpikas@analog.com Signed-off-by: Utsav Agarwal utsav.agarwal@analog.com Signed-off-by: Arturs Artamonovs arturs.artamonovs@analog.com Signed-off-by: Nathan Barrett-Morrison nathan.morrison@timesys.com --- MAINTAINERS | 1 + drivers/gpio/Kconfig | 8 ++ drivers/gpio/Makefile | 1 + drivers/gpio/adp5588_gpio.c | 208 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 218 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS index c890f2570729606e947ca07d6f12ca202cf91908..981c41cb512684736c933b78a3547657b13e016b 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -612,6 +612,7 @@ F: doc/device-tree-bindings/arm/adi/adi,sc5xx.yaml F: doc/device-tree-bindings/clock/adi,sc5xx-clocks.yaml F: doc/device-tree-bindings/timer/adi,sc5xx-gptimer.yaml F: drivers/clk/adi/ +F: drivers/gpio/adp5588_gpio.c F: drivers/gpio/gpio-adi-adsp.c F: drivers/pinctrl/pinctrl-adi-adsp.c F: drivers/serial/serial_adi_uart4.c diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index f6f62274fb097f4eb956fa776cbfd76c468caf98..8c70c96ae7cf3f2c45ab5977215e11b740830c7e 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -547,6 +547,14 @@ config DM_PCA953X Now, max 24 bits chips and PCA953X compatible chips are supported
+config ADP5588_GPIO + bool "ADP5588 GPIO expander driver" + depends on DM_GPIO && DM_I2C + help + Say yes here to support GPIO functionality of ADI ADP5588 chips. + + The ADP5588 is an 18-port I2C GPIO expander and keypad controller. + config SPL_DM_PCA953X bool "PCA95[357]x, PCA9698, TCA64xx, and MAX7310 I/O ports in SPL" depends on SPL_DM_GPIO diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 882c3f544c7c8d9d84f6511a818ba4d2b83a9aa1..57b12107cfd6ea46f12479fa6f242fb97a711cb3 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -74,6 +74,7 @@ obj-$(CONFIG_NOMADIK_GPIO) += nmk_gpio.o obj-$(CONFIG_MAX7320_GPIO) += max7320_gpio.o obj-$(CONFIG_$(XPL_)MAX77663_GPIO) += max77663_gpio.o obj-$(CONFIG_SL28CPLD_GPIO) += sl28cpld-gpio.o +obj-$(CONFIG_ADP5588_GPIO) += adp5588_gpio.o obj-$(CONFIG_ZYNQMP_GPIO_MODEPIN) += zynqmp_gpio_modepin.o obj-$(CONFIG_SLG7XL45106_I2C_GPO) += gpio_slg7xl45106.o obj-$(CONFIG_FTGPIO010) += ftgpio010.o diff --git a/drivers/gpio/adp5588_gpio.c b/drivers/gpio/adp5588_gpio.c new file mode 100644 index 0000000000000000000000000000000000000000..d081e16989713b7dfbd0d4fdadea8dab6e243583 --- /dev/null +++ b/drivers/gpio/adp5588_gpio.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * GPIO Chip driver for Analog Devices + * ADP5588/ADP5587 I/O Expander and QWERTY Keypad Controller + * + * (C) Copyright 2022 - Analog Devices, Inc. + * + * Written and/or maintained by Timesys Corporation + * + * Contact: Nathan Barrett-Morrison nathan.morrison@timesys.com + * Contact: Greg Malysa greg.malysa@timesys.com + * + * Based on Michael Hennerich's Linux driver: + * Michael Hennerich michael.hennerich@analog.com + * + */ + +#include <dm.h> +#include <i2c.h> +#include <asm-generic/gpio.h> + +#define ADP5588_MAXGPIO 18 +#define ADP5588_BANK(offs) ((offs) >> 3) +#define ADP5588_BIT(offs) (1u << ((offs) & 0x7)) + +#define DEV_ID 0x00 /* Device ID */ +#define GPIO_DAT_STAT1 0x14 /* GPIO Data Status, Read twice to clear */ +#define GPIO_DAT_STAT2 0x15 /* GPIO Data Status, Read twice to clear */ +#define GPIO_DAT_STAT3 0x16 /* GPIO Data Status, Read twice to clear */ +#define GPIO_DAT_OUT1 0x17 /* GPIO DATA OUT */ +#define GPIO_DAT_OUT2 0x18 /* GPIO DATA OUT */ +#define GPIO_DAT_OUT3 0x19 /* GPIO DATA OUT */ +#define GPIO_INT_EN1 0x1A /* GPIO Interrupt Enable */ +#define GPIO_INT_EN2 0x1B /* GPIO Interrupt Enable */ +#define GPIO_INT_EN3 0x1C /* GPIO Interrupt Enable */ +#define KP_GPIO1 0x1D /* Keypad or GPIO Selection */ +#define KP_GPIO2 0x1E /* Keypad or GPIO Selection */ +#define KP_GPIO3 0x1F /* Keypad or GPIO Selection */ +#define GPIO_DIR1 0x23 /* GPIO Data Direction */ +#define GPIO_DIR2 0x24 /* GPIO Data Direction */ +#define GPIO_DIR3 0x25 /* GPIO Data Direction */ +#define GPIO_PULL1 0x2C /* GPIO Pull Disable */ +#define GPIO_PULL2 0x2D /* GPIO Pull Disable */ +#define GPIO_PULL3 0x2E /* GPIO Pull Disable */ +#define ID_MASK 0x0F + +struct adp5588_gpio { + u8 dat_out[3]; + u8 dir[3]; +}; + +static int adp5588_gpio_read(struct udevice *dev, u8 reg) +{ + int ret; + u8 val; + + ret = dm_i2c_read(dev, reg, &val, 1); + + if (ret < 0) { + pr_err("%s: read error\n", __func__); + return ret; + } + + return val; +} + +static int adp5588_gpio_write(struct udevice *dev, u8 reg, u8 val) +{ + int ret; + + ret = dm_i2c_write(dev, reg, &val, 1); + if (ret < 0) { + pr_err("%s: write error\n", __func__); + return ret; + } + + return 0; +} + +static int adp5588_get_value(struct udevice *dev, u32 offset) +{ + struct adp5588_gpio *plat = dev_get_plat(dev); + unsigned int bank = ADP5588_BANK(offset); + unsigned int bit = ADP5588_BIT(offset); + int val; + + if (plat->dir[bank] & bit) + val = plat->dat_out[bank]; + else + val = adp5588_gpio_read(dev, GPIO_DAT_STAT1 + bank); + + return !!(val & bit); +} + +static int adp5588_set_value(struct udevice *dev, u32 offset, + int32_t value) +{ + unsigned int bank, bit; + int ret; + struct adp5588_gpio *plat = dev_get_plat(dev); + + bank = ADP5588_BANK(offset); + bit = ADP5588_BIT(offset); + + if (value) + plat->dat_out[bank] |= bit; + else + plat->dat_out[bank] &= ~bit; + + ret = adp5588_gpio_write(dev, GPIO_DAT_OUT1 + bank, + plat->dat_out[bank]); + + return ret; +} + +static int adp5588_direction_input(struct udevice *dev, u32 offset) +{ + int ret; + unsigned int bank; + struct adp5588_gpio *plat = dev_get_plat(dev); + + bank = ADP5588_BANK(offset); + + plat->dir[bank] &= ~ADP5588_BIT(offset); + ret = adp5588_gpio_write(dev, GPIO_DIR1 + bank, plat->dir[bank]); + + return ret; +} + +static int adp5588_direction_output(struct udevice *dev, + u32 offset, int value) +{ + int ret; + unsigned int bank, bit; + struct adp5588_gpio *plat = dev_get_plat(dev); + + bank = ADP5588_BANK(offset); + bit = ADP5588_BIT(offset); + + plat->dir[bank] |= bit; + + if (value) + plat->dat_out[bank] |= bit; + else + plat->dat_out[bank] &= ~bit; + + ret = adp5588_gpio_write(dev, GPIO_DAT_OUT1 + bank, + plat->dat_out[bank]); + ret |= adp5588_gpio_write(dev, GPIO_DIR1 + bank, + plat->dir[bank]); + + return ret; +} + +static int adp5588_ofdata_platdata(struct udevice *dev) +{ + struct adp5588_gpio *plat = dev_get_plat(dev); + struct gpio_dev_priv *priv = dev_get_uclass_priv(dev); + int node = dev_of_offset(dev); + int ret, i, revid; + + priv->gpio_count = ADP5588_MAXGPIO; + priv->bank_name = fdt_get_name(gd->fdt_blob, node, NULL); + + ret = adp5588_gpio_read(dev, DEV_ID); + if (ret < 0) + return ret; + + revid = ret & ID_MASK; + + printf("ADP5588 Detected: Rev %x, Rev ID %x\n", ret, revid); + + for (i = 0, ret = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) { + plat->dat_out[i] = adp5588_gpio_read(dev, GPIO_DAT_OUT1 + i); + plat->dir[i] = adp5588_gpio_read(dev, GPIO_DIR1 + i); + ret |= adp5588_gpio_write(dev, KP_GPIO1 + i, 0); + ret |= adp5588_gpio_write(dev, GPIO_PULL1 + i, 0); + ret |= adp5588_gpio_write(dev, GPIO_INT_EN1 + i, 0); + if (ret) { + pr_err("%s: Initialization error\n", __func__); + return ret; + } + } + + return 0; +} + +static const struct dm_gpio_ops adp5588_ops = { + .direction_input = adp5588_direction_input, + .direction_output = adp5588_direction_output, + .get_value = adp5588_get_value, + .set_value = adp5588_set_value, +}; + +static const struct udevice_id adp5588_of_match_list[] = { + { .compatible = "adi,adp5588"}, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(gpio_adp5588) = { + .name = "gpio_adp5588", + .id = UCLASS_GPIO, + .ops = &adp5588_ops, + .of_match = adp5588_of_match_list, + .of_to_plat = adp5588_ofdata_platdata, + .plat_auto = sizeof(struct adp5588_gpio), + .flags = DM_FLAG_PRE_RELOC, +};