pinctrl-lpass-lpi.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2020 Linaro Ltd.
*/
#include <linux/bitops.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/gpio/driver.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "../core.h"
#include "../pinctrl-utils.h"
#define LPI_SLEW_RATE_CTL_REG 0xa000
#define LPI_TLMM_REG_OFFSET 0x1000
#define LPI_SLEW_RATE_MAX 0x03
#define LPI_SLEW_BITS_SIZE 0x02
#define LPI_SLEW_RATE_MASK GENMASK(1, 0)
#define LPI_GPIO_CFG_REG 0x00
#define LPI_GPIO_PULL_MASK GENMASK(1, 0)
#define LPI_GPIO_FUNCTION_MASK GENMASK(5, 2)
#define LPI_GPIO_OUT_STRENGTH_MASK GENMASK(8, 6)
#define LPI_GPIO_OE_MASK BIT(9)
#define LPI_GPIO_VALUE_REG 0x04
#define LPI_GPIO_VALUE_IN_MASK BIT(0)
#define LPI_GPIO_VALUE_OUT_MASK BIT(1)
#define LPI_GPIO_BIAS_DISABLE 0x0
#define LPI_GPIO_PULL_DOWN 0x1
#define LPI_GPIO_KEEPER 0x2
#define LPI_GPIO_PULL_UP 0x3
#define LPI_GPIO_DS_TO_VAL(v) (v / 2 - 1)
#define NO_SLEW -1
#define LPI_FUNCTION(fname) \
[LPI_MUX_##fname] = { \
.name = #fname, \
.groups = fname##_groups, \
.ngroups = ARRAY_SIZE(fname##_groups), \
}
#define LPI_PINGROUP(id, soff, f1, f2, f3, f4) \
{ \
.name = "gpio" #id, \
.pins = gpio##id##_pins, \
.pin = id, \
.slew_offset = soff, \
.npins = ARRAY_SIZE(gpio##id##_pins), \
.funcs = (int[]){ \
LPI_MUX_gpio, \
LPI_MUX_##f1, \
LPI_MUX_##f2, \
LPI_MUX_##f3, \
LPI_MUX_##f4, \
}, \
.nfuncs = 5, \
}
struct lpi_pingroup {
const char *name;
const unsigned int *pins;
unsigned int npins;
unsigned int pin;
/* Bit offset in slew register for SoundWire pins only */
int slew_offset;
unsigned int *funcs;
unsigned int nfuncs;
};
struct lpi_function {
const char *name;
const char * const *groups;
unsigned int ngroups;
};
struct lpi_pinctrl_variant_data {
const struct pinctrl_pin_desc *pins;
int npins;
const struct lpi_pingroup *groups;
int ngroups;
const struct lpi_function *functions;
int nfunctions;
};
#define MAX_LPI_NUM_CLKS 2
struct lpi_pinctrl {
struct device *dev;
struct pinctrl_dev *ctrl;
struct gpio_chip chip;
struct pinctrl_desc desc;
char __iomem *tlmm_base;
char __iomem *slew_base;
struct clk_bulk_data clks[MAX_LPI_NUM_CLKS];
struct mutex slew_access_lock;
const struct lpi_pinctrl_variant_data *data;
};
/* sm8250 variant specific data */
static const struct pinctrl_pin_desc sm8250_lpi_pins[] = {
PINCTRL_PIN(0, "gpio0"),
PINCTRL_PIN(1, "gpio1"),
PINCTRL_PIN(2, "gpio2"),
PINCTRL_PIN(3, "gpio3"),
PINCTRL_PIN(4, "gpio4"),
PINCTRL_PIN(5, "gpio5"),
PINCTRL_PIN(6, "gpio6"),
PINCTRL_PIN(7, "gpio7"),
PINCTRL_PIN(8, "gpio8"),
PINCTRL_PIN(9, "gpio9"),
PINCTRL_PIN(10, "gpio10"),
PINCTRL_PIN(11, "gpio11"),
PINCTRL_PIN(12, "gpio12"),
PINCTRL_PIN(13, "gpio13"),
};
enum sm8250_lpi_functions {
LPI_MUX_dmic1_clk,
LPI_MUX_dmic1_data,
LPI_MUX_dmic2_clk,
LPI_MUX_dmic2_data,
LPI_MUX_dmic3_clk,
LPI_MUX_dmic3_data,
LPI_MUX_i2s1_clk,
LPI_MUX_i2s1_data,
LPI_MUX_i2s1_ws,
LPI_MUX_i2s2_clk,
LPI_MUX_i2s2_data,
LPI_MUX_i2s2_ws,
LPI_MUX_qua_mi2s_data,
LPI_MUX_qua_mi2s_sclk,
LPI_MUX_qua_mi2s_ws,
LPI_MUX_swr_rx_clk,
LPI_MUX_swr_rx_data,
LPI_MUX_swr_tx_clk,
LPI_MUX_swr_tx_data,
LPI_MUX_wsa_swr_clk,
LPI_MUX_wsa_swr_data,
LPI_MUX_gpio,
LPI_MUX__,
};
static const unsigned int gpio0_pins[] = { 0 };
static const unsigned int gpio1_pins[] = { 1 };
static const unsigned int gpio2_pins[] = { 2 };
static const unsigned int gpio3_pins[] = { 3 };
static const unsigned int gpio4_pins[] = { 4 };
static const unsigned int gpio5_pins[] = { 5 };
static const unsigned int gpio6_pins[] = { 6 };
static const unsigned int gpio7_pins[] = { 7 };
static const unsigned int gpio8_pins[] = { 8 };
static const unsigned int gpio9_pins[] = { 9 };
static const unsigned int gpio10_pins[] = { 10 };
static const unsigned int gpio11_pins[] = { 11 };
static const unsigned int gpio12_pins[] = { 12 };
static const unsigned int gpio13_pins[] = { 13 };
static const char * const swr_tx_clk_groups[] = { "gpio0" };
static const char * const swr_tx_data_groups[] = { "gpio1", "gpio2", "gpio5" };
static const char * const swr_rx_clk_groups[] = { "gpio3" };
static const char * const swr_rx_data_groups[] = { "gpio4", "gpio5" };
static const char * const dmic1_clk_groups[] = { "gpio6" };
static const char * const dmic1_data_groups[] = { "gpio7" };
static const char * const dmic2_clk_groups[] = { "gpio8" };
static const char * const dmic2_data_groups[] = { "gpio9" };
static const char * const i2s2_clk_groups[] = { "gpio10" };
static const char * const i2s2_ws_groups[] = { "gpio11" };
static const char * const dmic3_clk_groups[] = { "gpio12" };
static const char * const dmic3_data_groups[] = { "gpio13" };
static const char * const qua_mi2s_sclk_groups[] = { "gpio0" };
static const char * const qua_mi2s_ws_groups[] = { "gpio1" };
static const char * const qua_mi2s_data_groups[] = { "gpio2", "gpio3", "gpio4" };
static const char * const i2s1_clk_groups[] = { "gpio6" };
static const char * const i2s1_ws_groups[] = { "gpio7" };
static const char * const i2s1_data_groups[] = { "gpio8", "gpio9" };
static const char * const wsa_swr_clk_groups[] = { "gpio10" };
static const char * const wsa_swr_data_groups[] = { "gpio11" };
static const char * const i2s2_data_groups[] = { "gpio12", "gpio12" };
static const struct lpi_pingroup sm8250_groups[] = {
LPI_PINGROUP(0, 0, swr_tx_clk, qua_mi2s_sclk, _, _),
LPI_PINGROUP(1, 2, swr_tx_data, qua_mi2s_ws, _, _),
LPI_PINGROUP(2, 4, swr_tx_data, qua_mi2s_data, _, _),
LPI_PINGROUP(3, 8, swr_rx_clk, qua_mi2s_data, _, _),
LPI_PINGROUP(4, 10, swr_rx_data, qua_mi2s_data, _, _),
LPI_PINGROUP(5, 12, swr_tx_data, swr_rx_data, _, _),
LPI_PINGROUP(6, NO_SLEW, dmic1_clk, i2s1_clk, _, _),
LPI_PINGROUP(7, NO_SLEW, dmic1_data, i2s1_ws, _, _),
LPI_PINGROUP(8, NO_SLEW, dmic2_clk, i2s1_data, _, _),
LPI_PINGROUP(9, NO_SLEW, dmic2_data, i2s1_data, _, _),
LPI_PINGROUP(10, 16, i2s2_clk, wsa_swr_clk, _, _),
LPI_PINGROUP(11, 18, i2s2_ws, wsa_swr_data, _, _),
LPI_PINGROUP(12, NO_SLEW, dmic3_clk, i2s2_data, _, _),
LPI_PINGROUP(13, NO_SLEW, dmic3_data, i2s2_data, _, _),
};
static const struct lpi_function sm8250_functions[] = {
LPI_FUNCTION(dmic1_clk),
LPI_FUNCTION(dmic1_data),
LPI_FUNCTION(dmic2_clk),
LPI_FUNCTION(dmic2_data),
LPI_FUNCTION(dmic3_clk),
LPI_FUNCTION(dmic3_data),
LPI_FUNCTION(i2s1_clk),
LPI_FUNCTION(i2s1_data),
LPI_FUNCTION(i2s1_ws),
LPI_FUNCTION(i2s2_clk),
LPI_FUNCTION(i2s2_data),
LPI_FUNCTION(i2s2_ws),
LPI_FUNCTION(qua_mi2s_data),
LPI_FUNCTION(qua_mi2s_sclk),
LPI_FUNCTION(qua_mi2s_ws),
LPI_FUNCTION(swr_rx_clk),
LPI_FUNCTION(swr_rx_data),
LPI_FUNCTION(swr_tx_clk),
LPI_FUNCTION(swr_tx_data),
LPI_FUNCTION(wsa_swr_clk),
LPI_FUNCTION(wsa_swr_data),
};
static struct lpi_pinctrl_variant_data sm8250_lpi_data = {
.pins = sm8250_lpi_pins,
.npins = ARRAY_SIZE(sm8250_lpi_pins),
.groups = sm8250_groups,
.ngroups = ARRAY_SIZE(sm8250_groups),
.functions = sm8250_functions,
.nfunctions = ARRAY_SIZE(sm8250_functions),
};
static int lpi_gpio_read(struct lpi_pinctrl *state, unsigned int pin,
unsigned int addr)
{
return ioread32(state->tlmm_base + LPI_TLMM_REG_OFFSET * pin + addr);
}
static int lpi_gpio_write(struct lpi_pinctrl *state, unsigned int pin,
unsigned int addr, unsigned int val)
{
iowrite32(val, state->tlmm_base + LPI_TLMM_REG_OFFSET * pin + addr);
return 0;
}
static int lpi_gpio_get_groups_count(struct pinctrl_dev *pctldev)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->data->ngroups;
}
static const char *lpi_gpio_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->data->groups[group].name;
}
static int lpi_gpio_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group,
const unsigned int **pins,
unsigned int *num_pins)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
*pins = pctrl->data->groups[group].pins;
*num_pins = pctrl->data->groups[group].npins;
return 0;
}
static const struct pinctrl_ops lpi_gpio_pinctrl_ops = {
.get_groups_count = lpi_gpio_get_groups_count,
.get_group_name = lpi_gpio_get_group_name,
.get_group_pins = lpi_gpio_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinctrl_utils_free_map,
};
static int lpi_gpio_get_functions_count(struct pinctrl_dev *pctldev)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->data->nfunctions;
}
static const char *lpi_gpio_get_function_name(struct pinctrl_dev *pctldev,
unsigned int function)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->data->functions[function].name;
}
static int lpi_gpio_get_function_groups(struct pinctrl_dev *pctldev,
unsigned int function,
const char *const **groups,
unsigned *const num_qgroups)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctrl->data->functions[function].groups;
*num_qgroups = pctrl->data->functions[function].ngroups;
return 0;
}
static int lpi_gpio_set_mux(struct pinctrl_dev *pctldev, unsigned int function,
unsigned int group_num)
{
struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
const struct lpi_pingroup *g = &pctrl->data->groups[group_num];
u32 val;
int i, pin = g->pin;
for (i = 0; i < g->nfuncs; i++) {
if (g->funcs[i] == function)
break;
}
if (WARN_ON(i == g->nfuncs))
return -EINVAL;
val = lpi_gpio_read(pctrl, pin, LPI_GPIO_CFG_REG);
u32p_replace_bits(&val, i, LPI_GPIO_FUNCTION_MASK);
lpi_gpio_write(pctrl, pin, LPI_GPIO_CFG_REG, val);
return 0;
}
static const struct pinmux_ops lpi_gpio_pinmux_ops = {
.get_functions_count = lpi_gpio_get_functions_count,
.get_function_name = lpi_gpio_get_function_name,
.get_function_groups = lpi_gpio_get_function_groups,
.set_mux = lpi_gpio_set_mux,
};
static int lpi_config_get(struct pinctrl_dev *pctldev,
unsigned int pin, unsigned long *config)
{
unsigned int param = pinconf_to_config_param(*config);
struct lpi_pinctrl *state = dev_get_drvdata(pctldev->dev);
unsigned int arg = 0;
int is_out;
int pull;
u32 ctl_reg;
ctl_reg = lpi_gpio_read(state, pin, LPI_GPIO_CFG_REG);
is_out = ctl_reg & LPI_GPIO_OE_MASK;
pull = FIELD_GET(LPI_GPIO_PULL_MASK, ctl_reg);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
if (pull == LPI_GPIO_BIAS_DISABLE)
arg = 1;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
if (pull == LPI_GPIO_PULL_DOWN)
arg = 1;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
if (pull == LPI_GPIO_KEEPER)
arg = 1;
break;
case PIN_CONFIG_BIAS_PULL_UP:
if (pull == LPI_GPIO_PULL_UP)
arg = 1;
break;
case PIN_CONFIG_INPUT_ENABLE:
case PIN_CONFIG_OUTPUT:
if (is_out)
arg = 1;
break;
default:
return -EINVAL;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
unsigned long *configs, unsigned int nconfs)
{
struct lpi_pinctrl *pctrl = dev_get_drvdata(pctldev->dev);
unsigned int param, arg, pullup, strength;
bool value, output_enabled = false;
const struct lpi_pingroup *g;
unsigned long sval;
int i, slew_offset;
u32 val;
g = &pctrl->data->groups[group];
for (i = 0; i < nconfs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
pullup = LPI_GPIO_BIAS_DISABLE;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
pullup = LPI_GPIO_PULL_DOWN;
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
pullup = LPI_GPIO_KEEPER;
break;
case PIN_CONFIG_BIAS_PULL_UP:
pullup = LPI_GPIO_PULL_UP;
break;
case PIN_CONFIG_INPUT_ENABLE:
output_enabled = false;
break;
case PIN_CONFIG_OUTPUT:
output_enabled = true;
value = arg;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
strength = arg;
break;
case PIN_CONFIG_SLEW_RATE:
if (arg > LPI_SLEW_RATE_MAX) {
dev_err(pctldev->dev, "invalid slew rate %u for pin: %d\n",
arg, group);
return -EINVAL;
}
slew_offset = g->slew_offset;
if (slew_offset == NO_SLEW)
break;
mutex_lock(&pctrl->slew_access_lock);
sval = ioread32(pctrl->slew_base + LPI_SLEW_RATE_CTL_REG);
sval &= ~(LPI_SLEW_RATE_MASK << slew_offset);
sval |= arg << slew_offset;
iowrite32(sval, pctrl->slew_base + LPI_SLEW_RATE_CTL_REG);
mutex_unlock(&pctrl->slew_access_lock);
break;
default:
return -EINVAL;
}
}
val = lpi_gpio_read(pctrl, group, LPI_GPIO_CFG_REG);
u32p_replace_bits(&val, pullup, LPI_GPIO_PULL_MASK);
u32p_replace_bits(&val, LPI_GPIO_DS_TO_VAL(strength),
LPI_GPIO_OUT_STRENGTH_MASK);
u32p_replace_bits(&val, output_enabled, LPI_GPIO_OE_MASK);
lpi_gpio_write(pctrl, group, LPI_GPIO_CFG_REG, val);
if (output_enabled) {
val = u32_encode_bits(value ? 1 : 0, LPI_GPIO_VALUE_OUT_MASK);
lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val);
}
return 0;
}
static const struct pinconf_ops lpi_gpio_pinconf_ops = {
.is_generic = true,
.pin_config_group_get = lpi_config_get,
.pin_config_group_set = lpi_config_set,
};
static int lpi_gpio_direction_input(struct gpio_chip *chip, unsigned int pin)
{
struct lpi_pinctrl *state = gpiochip_get_data(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_INPUT_ENABLE, 1);
return lpi_config_set(state->ctrl, pin, &config, 1);
}
static int lpi_gpio_direction_output(struct gpio_chip *chip,
unsigned int pin, int val)
{
struct lpi_pinctrl *state = gpiochip_get_data(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, val);
return lpi_config_set(state->ctrl, pin, &config, 1);
}
static int lpi_gpio_get(struct gpio_chip *chip, unsigned int pin)
{
struct lpi_pinctrl *state = gpiochip_get_data(chip);
return lpi_gpio_read(state, pin, LPI_GPIO_VALUE_REG) &
LPI_GPIO_VALUE_IN_MASK;
}
static void lpi_gpio_set(struct gpio_chip *chip, unsigned int pin, int value)
{
struct lpi_pinctrl *state = gpiochip_get_data(chip);
unsigned long config;
config = pinconf_to_config_packed(PIN_CONFIG_OUTPUT, value);
lpi_config_set(state->ctrl, pin, &config, 1);
}
#ifdef CONFIG_DEBUG_FS
#include <linux/seq_file.h>
static unsigned int lpi_regval_to_drive(u32 val)
{
return (val + 1) * 2;
}
static void lpi_gpio_dbg_show_one(struct seq_file *s,
struct pinctrl_dev *pctldev,
struct gpio_chip *chip,
unsigned int offset,
unsigned int gpio)
{
struct lpi_pinctrl *state = gpiochip_get_data(chip);
struct pinctrl_pin_desc pindesc;
unsigned int func;
int is_out;
int drive;
int pull;
u32 ctl_reg;
static const char * const pulls[] = {
"no pull",
"pull down",
"keeper",
"pull up"
};
pctldev = pctldev ? : state->ctrl;
pindesc = pctldev->desc->pins[offset];
ctl_reg = lpi_gpio_read(state, offset, LPI_GPIO_CFG_REG);
is_out = ctl_reg & LPI_GPIO_OE_MASK;
func = FIELD_GET(LPI_GPIO_FUNCTION_MASK, ctl_reg);
drive = FIELD_GET(LPI_GPIO_OUT_STRENGTH_MASK, ctl_reg);
pull = FIELD_GET(LPI_GPIO_PULL_MASK, ctl_reg);
seq_printf(s, " %-8s: %-3s %d", pindesc.name, is_out ? "out" : "in", func);
seq_printf(s, " %dmA", lpi_regval_to_drive(drive));
seq_printf(s, " %s", pulls[pull]);
}
static void lpi_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
unsigned int gpio = chip->base;
unsigned int i;
for (i = 0; i < chip->ngpio; i++, gpio++) {
lpi_gpio_dbg_show_one(s, NULL, chip, i, gpio);
seq_puts(s, "\n");
}
}
#else
#define lpi_gpio_dbg_show NULL
#endif
static const struct gpio_chip lpi_gpio_template = {
.direction_input = lpi_gpio_direction_input,
.direction_output = lpi_gpio_direction_output,
.get = lpi_gpio_get,
.set = lpi_gpio_set,
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.dbg_show = lpi_gpio_dbg_show,
};
static int lpi_pinctrl_probe(struct platform_device *pdev)
{
const struct lpi_pinctrl_variant_data *data;
struct device *dev = &pdev->dev;
struct lpi_pinctrl *pctrl;
int ret;
pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
platform_set_drvdata(pdev, pctrl);
data = of_device_get_match_data(dev);
if (!data)
return -EINVAL;
pctrl->data = data;
pctrl->dev = &pdev->dev;
pctrl->clks[0].id = "core";
pctrl->clks[1].id = "audio";
pctrl->tlmm_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pctrl->tlmm_base))
return dev_err_probe(dev, PTR_ERR(pctrl->tlmm_base),
"TLMM resource not provided\n");
pctrl->slew_base = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(pctrl->slew_base))
return dev_err_probe(dev, PTR_ERR(pctrl->slew_base),
"Slew resource not provided\n");
ret = devm_clk_bulk_get(dev, MAX_LPI_NUM_CLKS, pctrl->clks);
if (ret)
return dev_err_probe(dev, ret, "Can't get clocks\n");
ret = clk_bulk_prepare_enable(MAX_LPI_NUM_CLKS, pctrl->clks);
if (ret)
return dev_err_probe(dev, ret, "Can't enable clocks\n");
pctrl->desc.pctlops = &lpi_gpio_pinctrl_ops;
pctrl->desc.pmxops = &lpi_gpio_pinmux_ops;
pctrl->desc.confops = &lpi_gpio_pinconf_ops;
pctrl->desc.owner = THIS_MODULE;
pctrl->desc.name = dev_name(dev);
pctrl->desc.pins = data->pins;
pctrl->desc.npins = data->npins;
pctrl->chip = lpi_gpio_template;
pctrl->chip.parent = dev;
pctrl->chip.base = -1;
pctrl->chip.ngpio = data->npins;
pctrl->chip.label = dev_name(dev);
pctrl->chip.of_gpio_n_cells = 2;
pctrl->chip.can_sleep = false;
mutex_init(&pctrl->slew_access_lock);
pctrl->ctrl = devm_pinctrl_register(dev, &pctrl->desc, pctrl);
if (IS_ERR(pctrl->ctrl)) {
ret = PTR_ERR(pctrl->ctrl);
dev_err(dev, "failed to add pin controller\n");
goto err_pinctrl;
}
ret = devm_gpiochip_add_data(dev, &pctrl->chip, pctrl);
if (ret) {
dev_err(pctrl->dev, "can't add gpio chip\n");
goto err_pinctrl;
}
return 0;
err_pinctrl:
mutex_destroy(&pctrl->slew_access_lock);
clk_bulk_disable_unprepare(MAX_LPI_NUM_CLKS, pctrl->clks);
return ret;
}
static int lpi_pinctrl_remove(struct platform_device *pdev)
{
struct lpi_pinctrl *pctrl = platform_get_drvdata(pdev);
mutex_destroy(&pctrl->slew_access_lock);
clk_bulk_disable_unprepare(MAX_LPI_NUM_CLKS, pctrl->clks);
return 0;
}
static const struct of_device_id lpi_pinctrl_of_match[] = {
{
.compatible = "qcom,sm8250-lpass-lpi-pinctrl",
.data = &sm8250_lpi_data,
},
{ }
};
MODULE_DEVICE_TABLE(of, lpi_pinctrl_of_match);
static struct platform_driver lpi_pinctrl_driver = {
.driver = {
.name = "qcom-lpass-lpi-pinctrl",
.of_match_table = lpi_pinctrl_of_match,
},
.probe = lpi_pinctrl_probe,
.remove = lpi_pinctrl_remove,
};
module_platform_driver(lpi_pinctrl_driver);
MODULE_DESCRIPTION("QTI LPI GPIO pin control driver");
MODULE_LICENSE("GPL");