linux-kernel - Re: [PATCH 4/9] mfd: htc-i2cpld: Use gpiochip data pointer

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Date:	Mon, 11 Apr 2016 12:48:28 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/9] mfd: htc-i2cpld: Use gpiochip data pointer

On Wed, 30 Mar 2016, Linus Walleij wrote:

> This makes the driver use the data pointer added to the gpio_chip
> to store a pointer to the state container instead of relying on
> container_of().
> 
> Acked-by: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  drivers/mfd/htc-i2cpld.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/htc-i2cpld.c b/drivers/mfd/htc-i2cpld.c
> index bd6b96d07ab8..3f9eee5f8fb9 100644
> --- a/drivers/mfd/htc-i2cpld.c
> +++ b/drivers/mfd/htc-i2cpld.c
> @@ -227,8 +227,7 @@ static irqreturn_t htcpld_handler(int irq, void *dev)
>  static void htcpld_chip_set(struct gpio_chip *chip, unsigned offset, int val)
>  {
>  	struct i2c_client *client;
> -	struct htcpld_chip *chip_data =
> -		container_of(chip, struct htcpld_chip, chip_out);
> +	struct htcpld_chip *chip_data = gpiochip_get_data(chip);
>  	unsigned long flags;
>  
>  	client = chip_data->client;
> @@ -257,14 +256,12 @@ static void htcpld_chip_set_ni(struct work_struct *work)
>  
>  static int htcpld_chip_get(struct gpio_chip *chip, unsigned offset)
>  {
> -	struct htcpld_chip *chip_data;
> +	struct htcpld_chip *chip_data = gpiochip_get_data(chip);
>  	u8 cache;
>  
>  	if (!strncmp(chip->label, "htcpld-out", 10)) {
> -		chip_data = container_of(chip, struct htcpld_chip, chip_out);
>  		cache = chip_data->cache_out;
>  	} else if (!strncmp(chip->label, "htcpld-in", 9)) {
> -		chip_data = container_of(chip, struct htcpld_chip, chip_in);
>  		cache = chip_data->cache_in;
>  	} else
>  		return -EINVAL;
> @@ -291,9 +288,7 @@ static int htcpld_direction_input(struct gpio_chip *chip,
>  
>  static int htcpld_chip_to_irq(struct gpio_chip *chip, unsigned offset)
>  {
> -	struct htcpld_chip *chip_data;
> -
> -	chip_data = container_of(chip, struct htcpld_chip, chip_in);
> +	struct htcpld_chip *chip_data = gpiochip_get_data(chip);
>  
>  	if (offset < chip_data->nirqs)
>  		return chip_data->irq_start + offset;
> @@ -451,14 +446,14 @@ static int htcpld_register_chip_gpio(
>  	gpio_chip->ngpio           = plat_chip_data->num_gpios;
>  
>  	/* Add the GPIO chips */
> -	ret = gpiochip_add(&(chip->chip_out));
> +	ret = gpiochip_add_data(&(chip->chip_out), chip);
>  	if (ret) {
>  		dev_warn(dev, "Unable to register output GPIOs for 0x%x: %d\n",
>  			 plat_chip_data->addr, ret);
>  		return ret;
>  	}
>  
> -	ret = gpiochip_add(&(chip->chip_in));
> +	ret = gpiochip_add_data(&(chip->chip_in), chip);
>  	if (ret) {
>  		dev_warn(dev, "Unable to register input GPIOs for 0x%x: %d\n",
>  			 plat_chip_data->addr, ret);

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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