linux-kernel - Re: [PATCH 6/9] mfd: tc6393xb: Use gpiochip data pointer

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Date:	Mon, 11 Apr 2016 12:49:25 +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,
	Dmitry Baryshkov <dbaryshkov@...il.com>
Subject: Re: [PATCH 6/9] mfd: tc6393xb: 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().
> 
> Cc: Dmitry Baryshkov <dbaryshkov@...il.com>
> Acked-by: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  drivers/mfd/tc6393xb.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/tc6393xb.c b/drivers/mfd/tc6393xb.c
> index 1ecbfa40d1b3..d42d322ac7ca 100644
> --- a/drivers/mfd/tc6393xb.c
> +++ b/drivers/mfd/tc6393xb.c
> @@ -24,7 +24,7 @@
>  #include <linux/mfd/core.h>
>  #include <linux/mfd/tmio.h>
>  #include <linux/mfd/tc6393xb.h>
> -#include <linux/gpio.h>
> +#include <linux/gpio/driver.h>
>  #include <linux/slab.h>
>  
>  #define SCR_REVID	0x08		/* b Revision ID	*/
> @@ -434,7 +434,7 @@ static struct mfd_cell tc6393xb_cells[] = {
>  static int tc6393xb_gpio_get(struct gpio_chip *chip,
>  		unsigned offset)
>  {
> -	struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
> +	struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
>  
>  	/* XXX: does dsr also represent inputs? */
>  	return !!(tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8))
> @@ -444,7 +444,7 @@ static int tc6393xb_gpio_get(struct gpio_chip *chip,
>  static void __tc6393xb_gpio_set(struct gpio_chip *chip,
>  		unsigned offset, int value)
>  {
> -	struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
> +	struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
>  	u8  dsr;
>  
>  	dsr = tmio_ioread8(tc6393xb->scr + SCR_GPO_DSR(offset / 8));
> @@ -459,7 +459,7 @@ static void __tc6393xb_gpio_set(struct gpio_chip *chip,
>  static void tc6393xb_gpio_set(struct gpio_chip *chip,
>  		unsigned offset, int value)
>  {
> -	struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
> +	struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  
>  	spin_lock_irqsave(&tc6393xb->lock, flags);
> @@ -472,7 +472,7 @@ static void tc6393xb_gpio_set(struct gpio_chip *chip,
>  static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
>  			unsigned offset)
>  {
> -	struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
> +	struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  	u8 doecr;
>  
> @@ -490,7 +490,7 @@ static int tc6393xb_gpio_direction_input(struct gpio_chip *chip,
>  static int tc6393xb_gpio_direction_output(struct gpio_chip *chip,
>  			unsigned offset, int value)
>  {
> -	struct tc6393xb *tc6393xb = container_of(chip, struct tc6393xb, gpio);
> +	struct tc6393xb *tc6393xb = gpiochip_get_data(chip);
>  	unsigned long flags;
>  	u8 doecr;
>  
> @@ -517,7 +517,7 @@ static int tc6393xb_register_gpio(struct tc6393xb *tc6393xb, int gpio_base)
>  	tc6393xb->gpio.direction_input = tc6393xb_gpio_direction_input;
>  	tc6393xb->gpio.direction_output = tc6393xb_gpio_direction_output;
>  
> -	return gpiochip_add(&tc6393xb->gpio);
> +	return gpiochip_add_data(&tc6393xb->gpio, tc6393xb);
>  }
>  
>  /*--------------------------------------------------------------------------*/

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