mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-03 01:50:25 +00:00
71858454fe
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>
238 lines
5.8 KiB
C
238 lines
5.8 KiB
C
// 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),
|
|
};
|