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drivers: gpio: implement PALMAS GPIO cell

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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>
This commit is contained in:
Svyatoslav Ryhel 2023-07-21 10:50:15 +03:00
parent 6b24c372c1
commit 52b6bbf162
5 changed files with 161 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpio/Kconfig
View File

@ -435,6 +435,13 @@ config VYBRID_GPIO
help
Say yes here to support Vybrid vf610 GPIOs.
config PALMAS_GPIO
bool "TI PALMAS series PMICs GPIO"
depends on DM_GPIO && PMIC_PALMAS
help
Select this option to enable GPIO driver for the TI PALMAS
series chip family.
config PIC32_GPIO
bool "Microchip PIC32 GPIO driver"
depends on DM_GPIO && MACH_PIC32

1
drivers/gpio/Makefile
View File

@ -55,6 +55,7 @@ obj-$(CONFIG_VYBRID_GPIO) += vybrid_gpio.o
obj-$(CONFIG_HIKEY_GPIO) += hi6220_gpio.o
obj-$(CONFIG_HSDK_CREG_GPIO) += hsdk-creg-gpio.o
obj-$(CONFIG_IMX_RGPIO2P) += imx_rgpio2p.o
obj-$(CONFIG_$(SPL_)PALMAS_GPIO) += palmas_gpio.o
obj-$(CONFIG_PIC32_GPIO) += pic32_gpio.o
obj-$(CONFIG_OCTEON_GPIO) += octeon_gpio.o
obj-$(CONFIG_MVEBU_GPIO) += mvebu_gpio.o

132
drivers/gpio/palmas_gpio.c Normal file
View File

@ -0,0 +1,132 @@
// 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,
};

10
drivers/power/pmic/palmas.c
View File

@ -46,7 +46,7 @@ static int palmas_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
static int palmas_bind(struct udevice *dev)
{
ofnode pmic_node = ofnode_null(), regulators_node;
ofnode subnode;
ofnode subnode, gpio_node;
int children, ret;
if (IS_ENABLED(CONFIG_SYSRESET_PALMAS)) {
@ -58,6 +58,14 @@ static int palmas_bind(struct udevice *dev)
}
}
gpio_node = ofnode_find_subnode(dev_ofnode(dev), "gpio");
if (ofnode_valid(gpio_node)) {
ret = device_bind_driver_to_node(dev, PALMAS_GPIO_DRIVER,
"gpio", gpio_node, NULL);
if (ret)
log_err("cannot bind GPIOs (ret = %d)\n", ret);
}
dev_for_each_subnode(subnode, dev) {
const char *name;
char *temp;

12
include/power/palmas.h
View File

@ -15,6 +15,7 @@ struct palmas_priv {
#define PALMAS_LDO_DRIVER "palmas_ldo"
#define PALMAS_SMPS_DRIVER "palmas_smps"
#define PALMAS_RST_DRIVER "palmas_rst"
#define PALMAS_GPIO_DRIVER "palmas_gpio"
#define PALMAS_SMPS_VOLT_MASK 0x7F
#define PALMAS_SMPS_RANGE_MASK 0x80
@ -35,3 +36,14 @@ struct palmas_priv {
#define DEV_OFF 0x00
#define PALMAS_INT3_MASK 0x1B
#define MASK_VBUS BIT(7)
/* second chip */
#define PALMAS_GPIO_DATA_IN 0x80
#define PALMAS_GPIO_DATA_DIR 0x81
#define PALMAS_GPIO_DATA_OUT 0x82
#define PALMAS_GPIO_DEBOUNCE_EN 0x83
#define PALMAS_GPIO_CLEAR_DATA_OUT 0x84
#define PALMAS_GPIO_SET_DATA_OUT 0x85
#define PALMAS_PU_PD_GPIO_CTRL1 0x86
#define PALMAS_PU_PD_GPIO_CTRL2 0x87
#define PALMAS_OD_OUTPUT_GPIO_CTRL 0x88