linux-kernel - Re: [PATCH 8/9] mfd: ucb1x00: Use gpiochip data pointer

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Date:	Mon, 11 Apr 2016 12:49:04 +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 8/9] mfd: ucb1x00: 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/ucb1x00-core.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c
> index bcafe1ecd71c..9ab9ec47ea75 100644
> --- a/drivers/mfd/ucb1x00-core.c
> +++ b/drivers/mfd/ucb1x00-core.c
> @@ -28,7 +28,7 @@
>  #include <linux/mutex.h>
>  #include <linux/mfd/ucb1x00.h>
>  #include <linux/pm.h>
> -#include <linux/gpio.h>
> +#include <linux/gpio/driver.h>
>  
>  static DEFINE_MUTEX(ucb1x00_mutex);
>  static LIST_HEAD(ucb1x00_drivers);
> @@ -109,7 +109,7 @@ unsigned int ucb1x00_io_read(struct ucb1x00 *ucb)
>  
>  static void ucb1x00_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
>  {
> -	struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
> +	struct ucb1x00 *ucb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  
>  	spin_lock_irqsave(&ucb->io_lock, flags);
> @@ -126,7 +126,7 @@ static void ucb1x00_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
>  
>  static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset)
>  {
> -	struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
> +	struct ucb1x00 *ucb = gpiochip_get_data(chip);
>  	unsigned val;
>  
>  	ucb1x00_enable(ucb);
> @@ -138,7 +138,7 @@ static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset)
>  
>  static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
>  {
> -	struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
> +	struct ucb1x00 *ucb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  
>  	spin_lock_irqsave(&ucb->io_lock, flags);
> @@ -154,7 +154,7 @@ static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
>  static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset
>  		, int value)
>  {
> -	struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
> +	struct ucb1x00 *ucb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  	unsigned old, mask = 1 << offset;
>  
> @@ -181,7 +181,7 @@ static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset
>  
>  static int ucb1x00_to_irq(struct gpio_chip *chip, unsigned offset)
>  {
> -	struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
> +	struct ucb1x00 *ucb = gpiochip_get_data(chip);
>  
>  	return ucb->irq_base > 0 ? ucb->irq_base + offset : -ENXIO;
>  }
> @@ -579,7 +579,7 @@ static int ucb1x00_probe(struct mcp *mcp)
>  		ucb->gpio.direction_input = ucb1x00_gpio_direction_input;
>  		ucb->gpio.direction_output = ucb1x00_gpio_direction_output;
>  		ucb->gpio.to_irq = ucb1x00_to_irq;
> -		ret = gpiochip_add(&ucb->gpio);
> +		ret = gpiochip_add_data(&ucb->gpio, ucb);
>  		if (ret)
>  			goto err_gpio_add;
>  	} else

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