Commit c8ce8782 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Linus Walleij

pincntrl: add support for ams AS3722 pin control driver

The AS3722 is a compact system PMU suitable for mobile phones, tablets etc.

Add a driver to support accessing the GPIO, pinmux and pin configuration
of 8 GPIO pins found on the ams AS3722 through pin control driver and
gpiolib.

The driver will register itself as the pincontrol driver and gpio driver.
Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent d1c30115
...@@ -59,6 +59,17 @@ config PINCTRL_ADI2 ...@@ -59,6 +59,17 @@ config PINCTRL_ADI2
future processors. This option is selected automatically when specific future processors. This option is selected automatically when specific
machine and arch are selected to build. machine and arch are selected to build.
config PINCTRL_AS3722
bool "Pinctrl and GPIO driver for ams AS3722 PMIC"
depends on MFD_AS3722 && GPIOLIB
select PINMUX
select GENERIC_PINCONF
help
AS3722 device supports the configuration of GPIO pins for different
functionality. This driver supports the pinmux, push-pull and
open drain configuration for the GPIO pins of AS3722 devices. It also
supports the GPIO functionality through gpiolib.
config PINCTRL_BF54x config PINCTRL_BF54x
def_bool y if BF54x def_bool y if BF54x
select PINCTRL_ADI2 select PINCTRL_ADI2
......
...@@ -15,6 +15,7 @@ obj-$(CONFIG_PINCTRL_AB8540) += pinctrl-ab8540.o ...@@ -15,6 +15,7 @@ obj-$(CONFIG_PINCTRL_AB8540) += pinctrl-ab8540.o
obj-$(CONFIG_PINCTRL_AB9540) += pinctrl-ab9540.o obj-$(CONFIG_PINCTRL_AB9540) += pinctrl-ab9540.o
obj-$(CONFIG_PINCTRL_AB8505) += pinctrl-ab8505.o obj-$(CONFIG_PINCTRL_AB8505) += pinctrl-ab8505.o
obj-$(CONFIG_PINCTRL_ADI2) += pinctrl-adi2.o obj-$(CONFIG_PINCTRL_ADI2) += pinctrl-adi2.o
obj-$(CONFIG_PINCTRL_AS3722) += pinctrl-as3722.o
obj-$(CONFIG_PINCTRL_BF54x) += pinctrl-adi2-bf54x.o obj-$(CONFIG_PINCTRL_BF54x) += pinctrl-adi2-bf54x.o
obj-$(CONFIG_PINCTRL_BF60x) += pinctrl-adi2-bf60x.o obj-$(CONFIG_PINCTRL_BF60x) += pinctrl-adi2-bf60x.o
obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o obj-$(CONFIG_PINCTRL_AT91) += pinctrl-at91.o
......
/*
* ams AS3722 pin control and GPIO driver.
*
* Copyright (c) 2013, NVIDIA Corporation.
*
* Author: Laxman Dewangan <ldewangan@nvidia.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
* whether express or implied; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/as3722.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include "core.h"
#include "pinconf.h"
#include "pinctrl-utils.h"
#define AS3722_PIN_GPIO0 0
#define AS3722_PIN_GPIO1 1
#define AS3722_PIN_GPIO2 2
#define AS3722_PIN_GPIO3 3
#define AS3722_PIN_GPIO4 4
#define AS3722_PIN_GPIO5 5
#define AS3722_PIN_GPIO6 6
#define AS3722_PIN_GPIO7 7
#define AS3722_PIN_NUM (AS3722_PIN_GPIO7 + 1)
#define AS3722_GPIO_MODE_PULL_UP BIT(PIN_CONFIG_BIAS_PULL_UP)
#define AS3722_GPIO_MODE_PULL_DOWN BIT(PIN_CONFIG_BIAS_PULL_DOWN)
#define AS3722_GPIO_MODE_HIGH_IMPED BIT(PIN_CONFIG_BIAS_HIGH_IMPEDANCE)
#define AS3722_GPIO_MODE_OPEN_DRAIN BIT(PIN_CONFIG_DRIVE_OPEN_DRAIN)
struct as3722_pin_function {
const char *name;
const char * const *groups;
unsigned ngroups;
int mux_option;
};
struct as3722_gpio_pin_control {
bool enable_gpio_invert;
unsigned mode_prop;
int io_function;
};
struct as3722_pingroup {
const char *name;
const unsigned pins[1];
unsigned npins;
};
struct as3722_pctrl_info {
struct device *dev;
struct pinctrl_dev *pctl;
struct as3722 *as3722;
struct gpio_chip gpio_chip;
int pins_current_opt[AS3722_PIN_NUM];
const struct as3722_pin_function *functions;
unsigned num_functions;
const struct as3722_pingroup *pin_groups;
int num_pin_groups;
const struct pinctrl_pin_desc *pins;
unsigned num_pins;
struct as3722_gpio_pin_control gpio_control[AS3722_PIN_NUM];
};
static const struct pinctrl_pin_desc as3722_pins_desc[] = {
PINCTRL_PIN(AS3722_PIN_GPIO0, "gpio0"),
PINCTRL_PIN(AS3722_PIN_GPIO1, "gpio1"),
PINCTRL_PIN(AS3722_PIN_GPIO2, "gpio2"),
PINCTRL_PIN(AS3722_PIN_GPIO3, "gpio3"),
PINCTRL_PIN(AS3722_PIN_GPIO4, "gpio4"),
PINCTRL_PIN(AS3722_PIN_GPIO5, "gpio5"),
PINCTRL_PIN(AS3722_PIN_GPIO6, "gpio6"),
PINCTRL_PIN(AS3722_PIN_GPIO7, "gpio7"),
};
static const char * const gpio_groups[] = {
"gpio0",
"gpio1",
"gpio2",
"gpio3",
"gpio4",
"gpio5",
"gpio6",
"gpio7",
};
enum as3722_pinmux_option {
AS3722_PINMUX_GPIO = 0,
AS3722_PINMUX_INTERRUPT_OUT = 1,
AS3722_PINMUX_VSUB_VBAT_UNDEB_LOW_OUT = 2,
AS3722_PINMUX_GPIO_INTERRUPT = 3,
AS3722_PINMUX_PWM_INPUT = 4,
AS3722_PINMUX_VOLTAGE_IN_STBY = 5,
AS3722_PINMUX_OC_PG_SD0 = 6,
AS3722_PINMUX_PG_OUT = 7,
AS3722_PINMUX_CLK32K_OUT = 8,
AS3722_PINMUX_WATCHDOG_INPUT = 9,
AS3722_PINMUX_SOFT_RESET_IN = 11,
AS3722_PINMUX_PWM_OUTPUT = 12,
AS3722_PINMUX_VSUB_VBAT_LOW_DEB_OUT = 13,
AS3722_PINMUX_OC_PG_SD6 = 14,
};
#define FUNCTION_GROUP(fname, mux) \
{ \
.name = #fname, \
.groups = gpio_groups, \
.ngroups = ARRAY_SIZE(gpio_groups), \
.mux_option = AS3722_PINMUX_##mux, \
}
static const struct as3722_pin_function as3722_pin_function[] = {
FUNCTION_GROUP(gpio, GPIO),
FUNCTION_GROUP(interrupt-out, INTERRUPT_OUT),
FUNCTION_GROUP(gpio-in-interrupt, GPIO_INTERRUPT),
FUNCTION_GROUP(vsup-vbat-low-undebounce-out, VSUB_VBAT_UNDEB_LOW_OUT),
FUNCTION_GROUP(vsup-vbat-low-debounce-out, VSUB_VBAT_LOW_DEB_OUT),
FUNCTION_GROUP(voltage-in-standby, VOLTAGE_IN_STBY),
FUNCTION_GROUP(oc-pg-sd0, OC_PG_SD0),
FUNCTION_GROUP(oc-pg-sd6, OC_PG_SD6),
FUNCTION_GROUP(powergood-out, PG_OUT),
FUNCTION_GROUP(pwm-in, PWM_INPUT),
FUNCTION_GROUP(pwm-out, PWM_OUTPUT),
FUNCTION_GROUP(clk32k-out, CLK32K_OUT),
FUNCTION_GROUP(watchdog-in, WATCHDOG_INPUT),
FUNCTION_GROUP(soft-reset-in, SOFT_RESET_IN),
};
#define AS3722_PINGROUP(pg_name, pin_id) \
{ \
.name = #pg_name, \
.pins = {AS3722_PIN_##pin_id}, \
.npins = 1, \
}
static const struct as3722_pingroup as3722_pingroups[] = {
AS3722_PINGROUP(gpio0, GPIO0),
AS3722_PINGROUP(gpio1, GPIO1),
AS3722_PINGROUP(gpio2, GPIO2),
AS3722_PINGROUP(gpio3, GPIO3),
AS3722_PINGROUP(gpio4, GPIO4),
AS3722_PINGROUP(gpio5, GPIO5),
AS3722_PINGROUP(gpio6, GPIO6),
AS3722_PINGROUP(gpio7, GPIO7),
};
static int as3722_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
return as_pci->num_pin_groups;
}
static const char *as3722_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
return as_pci->pin_groups[group].name;
}
static int as3722_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group, const unsigned **pins, unsigned *num_pins)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
*pins = as_pci->pin_groups[group].pins;
*num_pins = as_pci->pin_groups[group].npins;
return 0;
}
static const struct pinctrl_ops as3722_pinctrl_ops = {
.get_groups_count = as3722_pinctrl_get_groups_count,
.get_group_name = as3722_pinctrl_get_group_name,
.get_group_pins = as3722_pinctrl_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int as3722_pinctrl_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
return as_pci->num_functions;
}
static const char *as3722_pinctrl_get_func_name(struct pinctrl_dev *pctldev,
unsigned function)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
return as_pci->functions[function].name;
}
static int as3722_pinctrl_get_func_groups(struct pinctrl_dev *pctldev,
unsigned function, const char * const **groups,
unsigned * const num_groups)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
*groups = as_pci->functions[function].groups;
*num_groups = as_pci->functions[function].ngroups;
return 0;
}
static int as3722_pinctrl_enable(struct pinctrl_dev *pctldev, unsigned function,
unsigned group)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
int gpio_cntr_reg = AS3722_GPIOn_CONTROL_REG(group);
u8 val = AS3722_GPIO_IOSF_VAL(as_pci->functions[function].mux_option);
int ret;
dev_dbg(as_pci->dev, "%s(): GPIO %u pin to function %u and val %u\n",
__func__, group, function, val);
ret = as3722_update_bits(as_pci->as3722, gpio_cntr_reg,
AS3722_GPIO_IOSF_MASK, val);
if (ret < 0) {
dev_err(as_pci->dev, "GPIO%d_CTRL_REG update failed %d\n",
group, ret);
return ret;
}
as_pci->gpio_control[group].io_function = function;
return ret;
}
static int as3722_pinctrl_gpio_get_mode(unsigned gpio_mode_prop, bool input)
{
if (gpio_mode_prop & AS3722_GPIO_MODE_HIGH_IMPED)
return -EINVAL;
if (gpio_mode_prop & AS3722_GPIO_MODE_OPEN_DRAIN) {
if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
return AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP;
return AS3722_GPIO_MODE_IO_OPEN_DRAIN;
}
if (input) {
if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_UP)
return AS3722_GPIO_MODE_INPUT_PULL_UP;
else if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
return AS3722_GPIO_MODE_INPUT_PULL_DOWN;
return AS3722_GPIO_MODE_INPUT;
}
if (gpio_mode_prop & AS3722_GPIO_MODE_PULL_DOWN)
return AS3722_GPIO_MODE_OUTPUT_VDDL;
return AS3722_GPIO_MODE_OUTPUT_VDDH;
}
static int as3722_pinctrl_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned offset)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
if (as_pci->gpio_control[offset].io_function)
return -EBUSY;
return 0;
}
static int as3722_pinctrl_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned offset, bool input)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
struct as3722 *as3722 = as_pci->as3722;
int mode;
mode = as3722_pinctrl_gpio_get_mode(
as_pci->gpio_control[offset].mode_prop, input);
if (mode < 0) {
dev_err(as_pci->dev, "%s direction for GPIO %d not supported\n",
(input) ? "Input" : "Output", offset);
return mode;
}
if (as_pci->gpio_control[offset].enable_gpio_invert)
mode |= AS3722_GPIO_INV;
return as3722_write(as3722, AS3722_GPIOn_CONTROL_REG(offset), mode);
}
static const struct pinmux_ops as3722_pinmux_ops = {
.get_functions_count = as3722_pinctrl_get_funcs_count,
.get_function_name = as3722_pinctrl_get_func_name,
.get_function_groups = as3722_pinctrl_get_func_groups,
.enable = as3722_pinctrl_enable,
.gpio_request_enable = as3722_pinctrl_gpio_request_enable,
.gpio_set_direction = as3722_pinctrl_gpio_set_direction,
};
static int as3722_pinconf_get(struct pinctrl_dev *pctldev,
unsigned pin, unsigned long *config)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
int arg = 0;
u16 prop;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
prop = AS3722_GPIO_MODE_PULL_UP |
AS3722_GPIO_MODE_PULL_DOWN;
if (!(as_pci->gpio_control[pin].mode_prop & prop))
arg = 1;
prop = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
prop = AS3722_GPIO_MODE_PULL_UP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
prop = AS3722_GPIO_MODE_PULL_DOWN;
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
prop = AS3722_GPIO_MODE_OPEN_DRAIN;
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
prop = AS3722_GPIO_MODE_HIGH_IMPED;
break;
default:
dev_err(as_pci->dev, "Properties not supported\n");
return -ENOTSUPP;
}
if (as_pci->gpio_control[pin].mode_prop & prop)
arg = 1;
*config = pinconf_to_config_packed(param, (u16)arg);
return 0;
}
static int as3722_pinconf_set(struct pinctrl_dev *pctldev,
unsigned pin, unsigned long *configs,
unsigned num_configs)
{
struct as3722_pctrl_info *as_pci = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param;
int mode_prop;
int i;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
mode_prop = as_pci->gpio_control[pin].mode_prop;
switch (param) {
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
break;
case PIN_CONFIG_BIAS_DISABLE:
mode_prop &= ~(AS3722_GPIO_MODE_PULL_UP |
AS3722_GPIO_MODE_PULL_DOWN);
break;
case PIN_CONFIG_BIAS_PULL_UP:
mode_prop |= AS3722_GPIO_MODE_PULL_UP;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
mode_prop |= AS3722_GPIO_MODE_PULL_DOWN;
break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
mode_prop |= AS3722_GPIO_MODE_HIGH_IMPED;
break;
case PIN_CONFIG_DRIVE_OPEN_DRAIN:
mode_prop |= AS3722_GPIO_MODE_OPEN_DRAIN;
break;
default:
dev_err(as_pci->dev, "Properties not supported\n");
return -ENOTSUPP;
}
as_pci->gpio_control[pin].mode_prop = mode_prop;
}
return 0;
}
static const struct pinconf_ops as3722_pinconf_ops = {
.pin_config_get = as3722_pinconf_get,
.pin_config_set = as3722_pinconf_set,
};
static struct pinctrl_desc as3722_pinctrl_desc = {
.pctlops = &as3722_pinctrl_ops,
.pmxops = &as3722_pinmux_ops,
.confops = &as3722_pinconf_ops,
.owner = THIS_MODULE,
};
static inline struct as3722_pctrl_info *to_as_pci(struct gpio_chip *chip)
{
return container_of(chip, struct as3722_pctrl_info, gpio_chip);
}
static int as3722_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct as3722_pctrl_info *as_pci = to_as_pci(chip);
struct as3722 *as3722 = as_pci->as3722;
int ret;
u32 reg;
u32 control;
u32 val;
int mode;
int invert_enable;
ret = as3722_read(as3722, AS3722_GPIOn_CONTROL_REG(offset), &control);
if (ret < 0) {
dev_err(as_pci->dev,
"GPIO_CONTROL%d_REG read failed: %d\n", offset, ret);
return ret;
}
invert_enable = !!(control & AS3722_GPIO_INV);
mode = control & AS3722_GPIO_MODE_MASK;
switch (mode) {
case AS3722_GPIO_MODE_INPUT:
case AS3722_GPIO_MODE_INPUT_PULL_UP:
case AS3722_GPIO_MODE_INPUT_PULL_DOWN:
case AS3722_GPIO_MODE_IO_OPEN_DRAIN:
case AS3722_GPIO_MODE_IO_OPEN_DRAIN_PULL_UP:
reg = AS3722_GPIO_SIGNAL_IN_REG;
break;
case AS3722_GPIO_MODE_OUTPUT_VDDH:
case AS3722_GPIO_MODE_OUTPUT_VDDL:
reg = AS3722_GPIO_SIGNAL_OUT_REG;
break;
default:
return -EINVAL;
}
ret = as3722_read(as3722, reg, &val);
if (ret < 0) {
dev_err(as_pci->dev,
"GPIO_SIGNAL_IN_REG read failed: %d\n", ret);
return ret;
}
val = !!(val & AS3722_GPIOn_SIGNAL(offset));
return (invert_enable) ? !val : val;
}
static void as3722_gpio_set(struct gpio_chip *chip, unsigned offset,
int value)
{
struct as3722_pctrl_info *as_pci = to_as_pci(chip);
struct as3722 *as3722 = as_pci->as3722;
int en_invert = as_pci->gpio_control[offset].enable_gpio_invert;
u32 val;
int ret;
if (value)
val = (en_invert) ? 0 : AS3722_GPIOn_SIGNAL(offset);
else
val = (en_invert) ? AS3722_GPIOn_SIGNAL(offset) : 0;
ret = as3722_update_bits(as3722, AS3722_GPIO_SIGNAL_OUT_REG,
AS3722_GPIOn_SIGNAL(offset), val);
if (ret < 0)
dev_err(as_pci->dev,
"GPIO_SIGNAL_OUT_REG update failed: %d\n", ret);
}
static int as3722_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
return pinctrl_gpio_direction_input(chip->base + offset);
}
static int as3722_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
as3722_gpio_set(chip, offset, value);
return pinctrl_gpio_direction_output(chip->base + offset);
}
static int as3722_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct as3722_pctrl_info *as_pci = to_as_pci(chip);
return as3722_irq_get_virq(as_pci->as3722, offset);
}
static int as3722_gpio_request(struct gpio_chip *chip, unsigned offset)
{
return pinctrl_request_gpio(chip->base + offset);
}
static void as3722_gpio_free(struct gpio_chip *chip, unsigned offset)
{
pinctrl_free_gpio(chip->base + offset);
}
static const struct gpio_chip as3722_gpio_chip = {
.label = "as3722-gpio",
.owner = THIS_MODULE,
.request = as3722_gpio_request,
.free = as3722_gpio_free,
.get = as3722_gpio_get,
.set = as3722_gpio_set,
.direction_input = as3722_gpio_direction_input,
.direction_output = as3722_gpio_direction_output,
.to_irq = as3722_gpio_to_irq,
.can_sleep = 1,
.ngpio = AS3722_PIN_NUM,
.base = -1,
};
static int as3722_pinctrl_probe(struct platform_device *pdev)
{
struct as3722_pctrl_info *as_pci;
int ret;
int tret;
as_pci = devm_kzalloc(&pdev->dev, sizeof(*as_pci), GFP_KERNEL);
if (!as_pci)
return -ENOMEM;
as_pci->dev = &pdev->dev;
as_pci->dev->of_node = pdev->dev.parent->of_node;
as_pci->as3722 = dev_get_drvdata(pdev->dev.parent);
platform_set_drvdata(pdev, as_pci);
as_pci->pins = as3722_pins_desc;
as_pci->num_pins = ARRAY_SIZE(as3722_pins_desc);
as_pci->functions = as3722_pin_function;
as_pci->num_functions = ARRAY_SIZE(as3722_pin_function);
as_pci->pin_groups = as3722_pingroups;
as_pci->num_pin_groups = ARRAY_SIZE(as3722_pingroups);
as3722_pinctrl_desc.name = dev_name(&pdev->dev);
as3722_pinctrl_desc.pins = as3722_pins_desc;
as3722_pinctrl_desc.npins = ARRAY_SIZE(as3722_pins_desc);
as_pci->pctl = pinctrl_register(&as3722_pinctrl_desc,
&pdev->dev, as_pci);
if (!as_pci->pctl) {
dev_err(&pdev->dev, "Couldn't register pinctrl driver\n");
return -EINVAL;
}
as_pci->gpio_chip = as3722_gpio_chip;
as_pci->gpio_chip.dev = &pdev->dev;
as_pci->gpio_chip.of_node = pdev->dev.parent->of_node;
ret = gpiochip_add(&as_pci->gpio_chip);
if (ret < 0) {
dev_err(&pdev->dev, "Couldn't register gpiochip, %d\n", ret);
goto fail_chip_add;
}
ret = gpiochip_add_pin_range(&as_pci->gpio_chip, dev_name(&pdev->dev),
0, 0, AS3722_PIN_NUM);
if (ret < 0) {
dev_err(&pdev->dev, "Couldn't add pin range, %d\n", ret);
goto fail_range_add;
}
return 0;
fail_range_add:
tret = gpiochip_remove(&as_pci->gpio_chip);
if (tret < 0)
dev_warn(&pdev->dev, "Couldn't remove gpio chip, %d\n", tret);
fail_chip_add:
pinctrl_unregister(as_pci->pctl);
return ret;
}
static int as3722_pinctrl_remove(struct platform_device *pdev)
{
struct as3722_pctrl_info *as_pci = platform_get_drvdata(pdev);
int ret;
ret = gpiochip_remove(&as_pci->gpio_chip);
if (ret < 0)
return ret;
pinctrl_unregister(as_pci->pctl);
return 0;
}
static struct of_device_id as3722_pinctrl_of_match[] = {
{ .compatible = "ams,as3722-pinctrl", },
{ },
};
MODULE_DEVICE_TABLE(of, as3722_pinctrl_of_match);
static struct platform_driver as3722_pinctrl_driver = {
.driver = {
.name = "as3722-pinctrl",
.owner = THIS_MODULE,
.of_match_table = as3722_pinctrl_of_match,
},
.probe = as3722_pinctrl_probe,
.remove = as3722_pinctrl_remove,
};
module_platform_driver(as3722_pinctrl_driver);
MODULE_ALIAS("platform:as3722-pinctrl");
MODULE_DESCRIPTION("AS3722 pin control and GPIO driver");
MODULE_AUTHOR("Laxman Dewangan<ldewangan@nvidia.com>");
MODULE_LICENSE("GPL v2");
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