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regulator: max8997: Convert to GPIO descriptors

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This rewrites the max8997 regulator driver to fetch the dvs
regulators as descriptors. This will likely mostly come from
the device tree since there are no in-tree users of the platform
data, but supplying GPIO descriptor tables from board files is
also possible if needed.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://msgid.link/r/20240220-descriptors-regulators-v1-4-097f608694be@linaro.org
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Linus Walleij 2024-02-20 09:36:27 +01:00 committed by Mark Brown
parent 95daa868f2
commit 84618d5e31
2 changed files with 25 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

85
drivers/regulator/max8997-regulator.c
View File

@ -9,8 +9,7 @@
#include <linux/bug.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
@ -32,7 +31,7 @@ struct max8997_data {
u8 buck1_vol[8];
u8 buck2_vol[8];
u8 buck5_vol[8];
int buck125_gpios[3];
struct gpio_desc *buck125_gpiods[3];
int buck125_gpioindex;
bool ignore_gpiodvs_side_effect;
@ -52,9 +51,9 @@ static inline void max8997_set_gpio(struct max8997_data *max8997)
int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
gpio_set_value(max8997->buck125_gpios[0], set1);
gpio_set_value(max8997->buck125_gpios[1], set2);
gpio_set_value(max8997->buck125_gpios[2], set3);
gpiod_set_value(max8997->buck125_gpiods[0], set1);
gpiod_set_value(max8997->buck125_gpiods[1], set2);
gpiod_set_value(max8997->buck125_gpiods[2], set3);
}
struct voltage_map_desc {
@ -873,31 +872,13 @@ static struct regulator_desc regulators[] = {
};
#ifdef CONFIG_OF
static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev,
struct max8997_platform_data *pdata,
struct device_node *pmic_np)
{
int i, gpio;
for (i = 0; i < 3; i++) {
gpio = of_get_named_gpio(pmic_np,
"max8997,pmic-buck125-dvs-gpios", i);
if (!gpio_is_valid(gpio)) {
dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio);
return -EINVAL;
}
pdata->buck125_gpios[i] = gpio;
}
return 0;
}
static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
struct max8997_platform_data *pdata)
{
struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct device_node *pmic_np, *regulators_np, *reg_np;
struct max8997_regulator_data *rdata;
unsigned int i, dvs_voltage_nr = 1, ret;
unsigned int i, dvs_voltage_nr = 1;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
@ -949,10 +930,6 @@ static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
pdata->buck5_gpiodvs) {
ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np);
if (ret)
return -EINVAL;
if (of_property_read_u32(pmic_np,
"max8997,pmic-buck125-default-dvs-idx",
&pdata->buck125_default_idx)) {
@ -1039,7 +1016,6 @@ static int max8997_pmic_probe(struct platform_device *pdev)
max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
@ -1110,38 +1086,27 @@ static int max8997_pmic_probe(struct platform_device *pdev)
*/
if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
pdata->buck5_gpiodvs) {
const char *gpio_names[3] = {"MAX8997 SET1", "MAX8997 SET2", "MAX8997 SET3"};
if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
!gpio_is_valid(pdata->buck125_gpios[1]) ||
!gpio_is_valid(pdata->buck125_gpios[2])) {
dev_err(&pdev->dev, "GPIO NOT VALID\n");
return -EINVAL;
for (i = 0; i < 3; i++) {
enum gpiod_flags flags;
if (max8997->buck125_gpioindex & BIT(2 - i))
flags = GPIOD_OUT_HIGH;
else
flags = GPIOD_OUT_LOW;
max8997->buck125_gpiods[i] = devm_gpiod_get_index(iodev->dev,
"max8997,pmic-buck125-dvs",
i,
flags);
if (IS_ERR(max8997->buck125_gpiods[i])) {
ret = PTR_ERR(max8997->buck125_gpiods[i]);
return dev_err_probe(iodev->dev, ret, "cant get GPIO %d (%d)\n",
i, ret);
}
gpiod_set_consumer_name(max8997->buck125_gpiods[i], gpio_names[i]);
}
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0],
"MAX8997 SET1");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1],
"MAX8997 SET2");
if (ret)
return ret;
ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2],
"MAX8997 SET3");
if (ret)
return ret;
gpio_direction_output(pdata->buck125_gpios[0],
(max8997->buck125_gpioindex >> 2)
& 0x1); /* SET1 */
gpio_direction_output(pdata->buck125_gpios[1],
(max8997->buck125_gpioindex >> 1)
& 0x1); /* SET2 */
gpio_direction_output(pdata->buck125_gpios[2],
(max8997->buck125_gpioindex >> 0)
& 0x1); /* SET3 */
}
/* DVS-GPIO disabled */

1
include/linux/mfd/max8997.h
View File

@ -178,7 +178,6 @@ struct max8997_platform_data {
*
*/
bool ignore_gpiodvs_side_effect;
int buck125_gpios[3]; /* GPIO of [0]SET1, [1]SET2, [2]SET3 */
int buck125_default_idx; /* Default value of SET1, 2, 3 */
unsigned int buck1_voltage[8]; /* buckx_voltage in uV */
bool buck1_gpiodvs;