Add gpio driver for TI Palmas series PMIC. This has 8 gpio which can
work as input/output.
Signed-off-by: Svyatoslav Ryhel <clamo...@gmail.com>
---
drivers/gpio/Kconfig | 7 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/palmas_gpio.c | 133 ++++++++++++++++++++++++++++++++++++
drivers/power/pmic/palmas.c | 10 ++-
include/power/palmas.h | 12 ++++
5 files changed, 162 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpio/palmas_gpio.c
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 3c701eff5c..86c5f124a7 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -428,6 +428,13 @@ 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
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index dab3eb93a3..da3da5da2b 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -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
diff --git a/drivers/gpio/palmas_gpio.c b/drivers/gpio/palmas_gpio.c
new file mode 100644
index 0000000000..d2f0e0090a
--- /dev/null
+++ b/drivers/gpio/palmas_gpio.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Based on mainline Linux palmas GPIO driver
+ * Copyright(C) 2023 Svyatoslav Ryhel <clamo...@gmail.com>
+ */
+
+#include <common.h>
+#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_err("Reg 0x%02x write failed, %d\n", 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_err("GPIO_DATA_DIR read failed, %d\n", 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_err("Reg 0x%02x read failed, %d\n", 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_err("GPIO_DATA_DIR val update failed: %d\n", 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_err("GPIO_DATA_DIR val update failed: %d\n", 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_err("GPIO_DATA_DIR read failed, %d\n", 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,
+};
diff --git a/drivers/power/pmic/palmas.c b/drivers/power/pmic/palmas.c
index 32f2a938b2..e340a32279 100644
--- a/drivers/power/pmic/palmas.c
+++ b/drivers/power/pmic/palmas.c
@@ -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;
diff --git a/include/power/palmas.h b/include/power/palmas.h
index 0a612052f0..94c99dd411 100644
--- a/include/power/palmas.h
+++ b/include/power/palmas.h
@@ -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
--
2.39.2
