// 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 = "adi,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),
};