linux-kernel - Re: [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of GPIO number

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Message-ID: <20180212145855.2xxr5zvfbuswsbgh@dell>
Date:   Mon, 12 Feb 2018 14:58:55 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org
Subject: Re: [PATCH 14/21] regulator: s5m8767: Pass descriptor instead of
 GPIO number

On Mon, 12 Feb 2018, Linus Walleij wrote:

> Instead of passing a global GPIO number for the enable GPIO, pass
> a descriptor looked up from the device tree node for the
> regulator.
> 
> This regulator supports passing platform data, but enable/sleep
> regulators are looked up from the device tree exclusively, so
> we can need not touch other files.
> 
> Cc: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> Lee: would be nice if you could ACK this smallish patch to
> the MFD header.

Fine, but any sign of a conflict and I'll need a PR.

Acked-by: Lee Jones <lee.jones@...aro.org>

> ---
>  drivers/regulator/s5m8767.c      | 26 +++++++++++++++-----------
>  include/linux/mfd/samsung/core.h |  4 +++-
>  2 files changed, 18 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
> index 4836947e1521..b8443a360646 100644
> --- a/drivers/regulator/s5m8767.c
> +++ b/drivers/regulator/s5m8767.c
> @@ -13,6 +13,7 @@
>  
>  #include <linux/err.h>
>  #include <linux/of_gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/module.h>
>  #include <linux/platform_device.h>
>  #include <linux/regulator/driver.h>
> @@ -459,15 +460,14 @@ static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
>  		return;
>  	}
>  
> -	if (!gpio_is_valid(rdata->ext_control_gpio)) {
> +	if (!rdata->ext_control_gpiod) {
>  		dev_warn(s5m8767->dev,
>  				"ext-control for %s: GPIO not valid, ignoring\n",
> -				rdata->reg_node->name);
> +			 rdata->reg_node->name);
>  		return;
>  	}
>  
> -	config->ena_gpio = rdata->ext_control_gpio;
> -	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
> +	config->ena_gpiod = rdata->ext_control_gpiod;
>  }
>  
>  /*
> @@ -577,8 +577,14 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
>  			continue;
>  		}
>  
> -		rdata->ext_control_gpio = of_get_named_gpio(reg_np,
> -			"s5m8767,pmic-ext-control-gpios", 0);
> +		rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
> +								       reg_np,
> +								       "s5m8767,pmic-ext-control-gpios",
> +								       0,
> +								       GPIOD_OUT_HIGH,
> +								       "s5m8767");
> +		if (IS_ERR(rdata->ext_control_gpiod))
> +			return PTR_ERR(rdata->ext_control_gpiod);
>  
>  		rdata->id = i;
>  		rdata->initdata = of_get_regulator_init_data(
> @@ -954,10 +960,8 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
>  		config.driver_data = s5m8767;
>  		config.regmap = iodev->regmap_pmic;
>  		config.of_node = pdata->regulators[i].reg_node;
> -		config.ena_gpio = -EINVAL;
> -		config.ena_gpio_flags = 0;
> -		config.ena_gpio_initialized = true;
> -		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio))
> +		config.ena_gpiod = NULL;
> +		if (pdata->regulators[i].ext_control_gpiod)
>  			s5m8767_regulator_config_ext_control(s5m8767,
>  					&pdata->regulators[i], &config);
>  
> @@ -970,7 +974,7 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
>  			return ret;
>  		}
>  
> -		if (gpio_is_valid(pdata->regulators[i].ext_control_gpio)) {
> +		if (pdata->regulators[i].ext_control_gpiod) {
>  			ret = s5m8767_enable_ext_control(s5m8767, rdev);
>  			if (ret < 0) {
>  				dev_err(s5m8767->dev,
> diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
> index 5a23dd4df432..28f4ae76271d 100644
> --- a/include/linux/mfd/samsung/core.h
> +++ b/include/linux/mfd/samsung/core.h
> @@ -39,6 +39,8 @@
>  #define STEP_12_5_MV		12500
>  #define STEP_6_25_MV		6250
>  
> +struct gpio_desc;
> +
>  enum sec_device_type {
>  	S5M8751X,
>  	S5M8763X,
> @@ -151,7 +153,7 @@ struct sec_regulator_data {
>  	int				id;
>  	struct regulator_init_data	*initdata;
>  	struct device_node		*reg_node;
> -	int				ext_control_gpio;
> +	struct gpio_desc		*ext_control_gpiod;
>  };
>  
>  /*

-- 
Lee Jones
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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