--- /dev/null
+// 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),
+};
projects / u-boot.git / commitdiff