mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-15 17:28:15 +00:00
52b6bbf162
Add gpio driver for TI Palmas series PMIC. This has 8 gpio which can work as input/output. Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
132 lines
3 KiB
C
132 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Based on mainline Linux palmas GPIO driver
|
|
* Copyright(C) 2023 Svyatoslav Ryhel <clamor95@gmail.com>
|
|
*/
|
|
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <asm/gpio.h>
|
|
#include <power/palmas.h>
|
|
|
|
#define NUM_GPIOS 8
|
|
|
|
static int palmas_gpio_set_value(struct udevice *dev, unsigned int offset,
|
|
int value)
|
|
{
|
|
struct palmas_priv *priv = dev_get_priv(dev->parent);
|
|
u32 reg;
|
|
int ret;
|
|
|
|
reg = (value) ? PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;
|
|
|
|
ret = dm_i2c_reg_write(priv->chip2, reg, BIT(offset));
|
|
if (ret < 0)
|
|
log_debug("%s: Reg 0x%02x write failed, %d\n", __func__, reg, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int palmas_gpio_get_value(struct udevice *dev, unsigned int offset)
|
|
{
|
|
struct palmas_priv *priv = dev_get_priv(dev->parent);
|
|
u32 reg;
|
|
int ret;
|
|
|
|
ret = dm_i2c_reg_read(priv->chip2, PALMAS_GPIO_DATA_DIR);
|
|
if (ret < 0) {
|
|
log_debug("%s: GPIO_DATA_DIR read failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (ret & BIT(offset))
|
|
reg = PALMAS_GPIO_DATA_OUT;
|
|
else
|
|
reg = PALMAS_GPIO_DATA_IN;
|
|
|
|
ret = dm_i2c_reg_read(priv->chip2, reg);
|
|
if (ret < 0) {
|
|
log_debug("%s: Reg 0x%02x read failed, %d\n", __func__, reg, ret);
|
|
return ret;
|
|
}
|
|
|
|
return !!(ret & BIT(offset));
|
|
}
|
|
|
|
static int palmas_gpio_direction_input(struct udevice *dev, unsigned int offset)
|
|
{
|
|
struct palmas_priv *priv = dev_get_priv(dev->parent);
|
|
int ret;
|
|
|
|
ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_GPIO_DATA_DIR,
|
|
BIT(offset), 0);
|
|
if (ret < 0)
|
|
log_debug("%s: GPIO_DATA_DIR val update failed: %d\n", __func__, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int palmas_gpio_direction_output(struct udevice *dev, unsigned int offset,
|
|
int value)
|
|
{
|
|
struct palmas_priv *priv = dev_get_priv(dev->parent);
|
|
int ret;
|
|
|
|
/* Set the initial value */
|
|
palmas_gpio_set_value(dev, offset, value);
|
|
|
|
ret = dm_i2c_reg_clrset(priv->chip2, PALMAS_GPIO_DATA_DIR,
|
|
BIT(offset), BIT(offset));
|
|
if (ret < 0)
|
|
log_debug("%s: GPIO_DATA_DIR val update failed: %d\n", __func__, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int palmas_gpio_get_function(struct udevice *dev, unsigned int offset)
|
|
{
|
|
struct palmas_priv *priv = dev_get_priv(dev->parent);
|
|
int ret;
|
|
|
|
ret = dm_i2c_reg_read(priv->chip2, PALMAS_GPIO_DATA_DIR);
|
|
if (ret < 0) {
|
|
log_debug("%s: GPIO_DATA_DIR read failed, %d\n", __func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (ret & BIT(offset))
|
|
return GPIOF_OUTPUT;
|
|
else
|
|
return GPIOF_INPUT;
|
|
}
|
|
|
|
static const struct dm_gpio_ops palmas_gpio_ops = {
|
|
.direction_input = palmas_gpio_direction_input,
|
|
.direction_output = palmas_gpio_direction_output,
|
|
.get_value = palmas_gpio_get_value,
|
|
.set_value = palmas_gpio_set_value,
|
|
.get_function = palmas_gpio_get_function,
|
|
};
|
|
|
|
static int palmas_gpio_probe(struct udevice *dev)
|
|
{
|
|
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
|
|
|
|
uc_priv->gpio_count = NUM_GPIOS;
|
|
uc_priv->bank_name = "GPIO";
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct udevice_id palmas_ids[] = {
|
|
{ .compatible = "ti,palmas-gpio" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(palmas_gpio) = {
|
|
.name = PALMAS_GPIO_DRIVER,
|
|
.id = UCLASS_GPIO,
|
|
.of_match = palmas_ids,
|
|
.probe = palmas_gpio_probe,
|
|
.ops = &palmas_gpio_ops,
|
|
};
|