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Message-ID: <17a4dbd7-56cb-4c20-a913-0df5c39fc3ff@kernel.org>
Date: Fri, 6 Dec 2024 09:33:48 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Song Chen <chensong_2000@....cn>, lgirdwood@...il.com,
broonie@...nel.org, lee@...nel.org, linus.walleij@...aro.org, brgl@...ev.pl
Cc: linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH] regulator:s5m8767 Fully convert to GPIO descriptors
On 06/12/2024 06:13, Song Chen wrote:
> This converts s5m8767 regulator driver to use GPIO
> descriptors.
Please wrap commit message according to Linux coding style / submission
process (neither too early nor over the limit):
https://elixir.bootlin.com/linux/v6.4-rc1/source/Documentation/process/submitting-patches.rst#L597
Subject: missing : after s5m prefix.
>
> Signed-off-by: Song Chen <chensong_2000@....cn>
> ---
> drivers/regulator/s5m8767.c | 110 ++++++++++---------------------
> include/linux/mfd/samsung/core.h | 5 +-
> 2 files changed, 37 insertions(+), 78 deletions(-)
>
> diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
> index d25cd81e3f36..d0b1eed4dfa0 100644
> --- a/drivers/regulator/s5m8767.c
> +++ b/drivers/regulator/s5m8767.c
> @@ -5,7 +5,7 @@
>
> #include <linux/cleanup.h>
> #include <linux/err.h>
> -#include <linux/of_gpio.h>
> +//#include <linux/of_gpio.h>
Some development code was left.
> #include <linux/gpio/consumer.h>
> #include <linux/module.h>
> #include <linux/platform_device.h>
> @@ -15,6 +15,7 @@
> #include <linux/mfd/samsung/s5m8767.h>
> #include <linux/regulator/of_regulator.h>
> #include <linux/regmap.h>
> +#include <linux/of.h>
>
> #define S5M8767_OPMODE_NORMAL_MODE 0x1
>
> @@ -23,6 +24,8 @@ struct s5m8767_info {
> struct sec_pmic_dev *iodev;
> int num_regulators;
> struct sec_opmode_data *opmode;
> + struct gpio_desc *buck_gpios[3];
> + struct gpio_desc *buck_ds[3];
>
> int ramp_delay;
> bool buck2_ramp;
> @@ -35,8 +38,7 @@ struct s5m8767_info {
> u8 buck2_vol[8];
> u8 buck3_vol[8];
> u8 buck4_vol[8];
> - int buck_gpios[3];
> - int buck_ds[3];
Don't move them.
> +
No need.
> int buck_gpioindex;
> };
>
> @@ -272,9 +274,9 @@ static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
> {
> int temp_index = s5m8767->buck_gpioindex;
>
> - gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
> - gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
> - gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
>
> return 0;
> }
> @@ -283,9 +285,9 @@ static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
> {
> int temp_index = s5m8767->buck_gpioindex;
>
> - gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
> - gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
> - gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
> + gpiod_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
>
> return 0;
> }
> @@ -486,16 +488,22 @@ static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
> struct sec_platform_data *pdata,
> struct device_node *pmic_np)
> {
> - int i, gpio;
> + int i;
> + char label[32];
>
> for (i = 0; i < 3; i++) {
> - gpio = of_get_named_gpio(pmic_np,
> - "s5m8767,pmic-buck-dvs-gpios", i);
> - if (!gpio_is_valid(gpio)) {
> - dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
> + pdata->buck_gpios[i] = devm_gpiod_get_index(iodev->dev,
> + "s5m8767,pmic-buck-dvs", i, GPIOD_OUT_LOW);
> + if (IS_ERR(pdata->buck_gpios[i])) {
> + dev_err(iodev->dev, "invalid gpio[%d]\n", i);
Why not printing error msg? This should be also return dev_err_probe
> return -EINVAL;
> }
> - pdata->buck_gpios[i] = gpio;
> +
> + /* SET GPIO*/
What is a SET GPIO?
> + snprintf(label, sizeof(label), "%s%d", "S5M8767 SET", i + 1);
Why using "SET" as name, not the actual name it is used for? Buck DVS?
> + gpiod_set_consumer_name(pdata->buck_gpios[i], label);
> + gpiod_direction_output(pdata->buck_gpios[i],
> + (pdata->buck_default_idx >> (2 - i)) & 0x1);
This is not an equivalent code. You set values for GPIOs 0-1 even if
requesting GPIO 2 fails.
On which board did you test it?
> }
> return 0;
> }
> @@ -504,16 +512,21 @@ static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
> struct sec_platform_data *pdata,
> struct device_node *pmic_np)
> {
> - int i, gpio;
> + int i;
> + char label[32];
>
> for (i = 0; i < 3; i++) {
> - gpio = of_get_named_gpio(pmic_np,
> - "s5m8767,pmic-buck-ds-gpios", i);
> - if (!gpio_is_valid(gpio)) {
> - dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
> + pdata->buck_ds[i] = devm_gpiod_get_index(iodev->dev,
> + "s5m8767,pmic-buck-ds", i, GPIOD_OUT_LOW);
> + if (IS_ERR(pdata->buck_ds[i])) {
> + dev_err(iodev->dev, "invalid gpio[%d]\n", i);
> return -EINVAL;
> }
> - pdata->buck_ds[i] = gpio;
> +
> + /* SET GPIO*/
> + snprintf(label, sizeof(label), "%s%d", "S5M8767 DS", i + 2);
> + gpiod_set_consumer_name(pdata->buck_gpios[i], label);
> + gpiod_direction_output(pdata->buck_gpios[i], 0);
> }
> return 0;
> }
> @@ -785,61 +798,6 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
> }
> }
>
> - if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
> - pdata->buck4_gpiodvs) {
> -
> - if (!gpio_is_valid(pdata->buck_gpios[0]) ||
> - !gpio_is_valid(pdata->buck_gpios[1]) ||
> - !gpio_is_valid(pdata->buck_gpios[2])) {
> - dev_err(&pdev->dev, "GPIO NOT VALID\n");
> - return -EINVAL;
> - }
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
> - "S5M8767 SET1");
> - if (ret)
> - return ret;
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
> - "S5M8767 SET2");
> - if (ret)
> - return ret;
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
> - "S5M8767 SET3");
> - if (ret)
> - return ret;
> -
> - /* SET1 GPIO */
> - gpio_direction_output(pdata->buck_gpios[0],
> - (s5m8767->buck_gpioindex >> 2) & 0x1);
> - /* SET2 GPIO */
> - gpio_direction_output(pdata->buck_gpios[1],
> - (s5m8767->buck_gpioindex >> 1) & 0x1);
> - /* SET3 GPIO */
> - gpio_direction_output(pdata->buck_gpios[2],
> - (s5m8767->buck_gpioindex >> 0) & 0x1);
> - }
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
> - if (ret)
> - return ret;
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
> - if (ret)
> - return ret;
> -
> - ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
> - if (ret)
> - return ret;
> -
> - /* DS2 GPIO */
> - gpio_direction_output(pdata->buck_ds[0], 0x0);
> - /* DS3 GPIO */
> - gpio_direction_output(pdata->buck_ds[1], 0x0);
> - /* DS4 GPIO */
> - gpio_direction_output(pdata->buck_ds[2], 0x0);
> -
> regmap_update_bits(s5m8767->iodev->regmap_pmic,
> S5M8767_REG_BUCK2CTRL, 1 << 1,
> (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
> diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
> index 750274d41fc0..b757f15877a3 100644
> --- a/include/linux/mfd/samsung/core.h
> +++ b/include/linux/mfd/samsung/core.h
> @@ -33,6 +33,7 @@
> #define STEP_12_5_MV 12500
> #define STEP_6_25_MV 6250
>
> +#define BULK_GPIO_COUNT 3
Where do you use ot?
> struct gpio_desc;
>
> enum sec_device_type {
> @@ -77,10 +78,10 @@ int sec_irq_resume(struct sec_pmic_dev *sec_pmic);
> struct sec_platform_data {
> struct sec_regulator_data *regulators;
> struct sec_opmode_data *opmode;
> + struct gpio_desc *buck_gpios[3];
> + struct gpio_desc *buck_ds[3];
> int num_regulators;
>
> - int buck_gpios[3];
> - int buck_ds[3];
Don't move the code.
> unsigned int buck2_voltage[8];
> bool buck2_gpiodvs;
> unsigned int buck3_voltage[8];
Best regards,
Krzysztof
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