linux-kernel - Re: [PATCH v2 3/3] gpio tps65215: Add support for varying gpio/offset values

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Message-ID: <a34f42fb-30e0-426b-8efe-9be0c0494fe7@kernel.org>
Date: Sat, 4 Jan 2025 20:27:13 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Shree Ramamoorthy <s-ramamoorthy@...com>, aaro.koskinen@....fi,
 andreas@...nade.info, khilman@...libre.com, tony@...mide.com,
 linus.walleij@...aro.org, brgl@...ev.pl, linux-omap@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org
Cc: m-leonard@...com, praneeth@...com, christophe.jaillet@...adoo.fr
Subject: Re: [PATCH v2 3/3] gpio tps65215: Add support for varying gpio/offset
 values



On 04/01/2025 00:54, Shree Ramamoorthy wrote:
> Add device-specific structs to select the different PMIC .npgio and .offset
> values. With the chip_data struct values selected based on the match data,
> having a separate GPIO0_OFFSET macro is no longer needed.
> 
> Signed-off-by: Shree Ramamoorthy <s-ramamoorthy@...com>
> ---
>  drivers/gpio/gpio-tps65219.c | 27 ++++++++++++++++++++++++---
>  1 file changed, 24 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-tps65219.c b/drivers/gpio/gpio-tps65219.c
> index 70a4410c473a..14286dd5fdfb 100644
> --- a/drivers/gpio/gpio-tps65219.c
> +++ b/drivers/gpio/gpio-tps65219.c
> @@ -13,7 +13,6 @@
>  #include <linux/regmap.h>
>  
>  #define TPS65219_GPIO0_DIR_MASK		BIT(3)
> -#define TPS65219_GPIO0_OFFSET		2
>  #define TPS6521X_GPIO0_IDX			0
>  
>  struct tps65219_gpio {
> @@ -21,6 +20,11 @@ struct tps65219_gpio {
>  	struct tps65219 *tps;
>  };
>  
> +struct tps65219_chip_data {
> +	int ngpio;
> +	int offset;
> +};
> +
>  static int tps65219_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
>  {
>  	struct tps65219_gpio *gpio = gpiochip_get_data(gc);
> @@ -71,7 +75,7 @@ static void tps65219_gpio_set(struct gpio_chip *gc, unsigned int offset, int val
>  	struct device *dev = gpio->tps->dev;
>  	int v, mask, bit;
>  
> -	bit = (offset == TPS6521X_GPIO0_IDX) ? TPS65219_GPIO0_OFFSET : offset - 1;
> +	bit = (offset == TPS6521X_GPIO0_IDX) ? (gpio->gpio_chip.ngpio - 1) : offset - 1;

shouldn't this be
	bit = (offset == TPS6521X_GPIO0_IDX) ? (gpio->gpio_chip.offset - 1) : offset - 1;

>  
>  	mask = BIT(bit);
>  	v = value ? mask : 0;
> @@ -148,14 +152,29 @@ static const struct gpio_chip tps65219_template_chip = {
>  	.get			= tps65219_gpio_get,
>  	.set			= tps65219_gpio_set,
>  	.base			= -1,
> -	.ngpio			= 3,
>  	.can_sleep		= true,
>  };
>  
> +static const struct tps65219_chip_data chip_info_table[] = {
> +	[TPS65215] = {
> +		.ngpio = 2,
> +		.offset = 1,
> +	},
> +	[TPS65219] = {
> +		.ngpio = 3,
> +		.offset = 2,
> +	},
> +};
> +
>  static int tps65219_gpio_probe(struct platform_device *pdev)
>  {
>  	struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent);
>  	struct tps65219_gpio *gpio;
> +	const struct tps65219_chip_data *pmic;
> +
> +	enum pmic_id chip = platform_get_device_id(pdev)->driver_data;
> +

unnecessary newline?

> +	pmic = &chip_info_table[chip];
>

here too?
  
>  	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
>  	if (!gpio)
> @@ -164,6 +183,8 @@ static int tps65219_gpio_probe(struct platform_device *pdev)
>  	gpio->tps = tps;
>  	gpio->gpio_chip = tps65219_template_chip;
>  	gpio->gpio_chip.label = dev_name(&pdev->dev);
> +	gpio->gpio_chip.ngpio =  pmic->ngpio;
> +	gpio->gpio_chip.offset = pmic->offset;
>  	gpio->gpio_chip.parent = tps->dev;
>  
>  	return devm_gpiochip_add_data(&pdev->dev, &gpio->gpio_chip, gpio);

-- 
cheers,
-roger