linux-kernel - Re: [PATCH v2] mfd: stmpe: move platform data into mfd driver

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Date:	Mon, 20 Jun 2016 10:42:17 +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,
	Patrice Chotard <patrice.chotard@...com>
Subject: Re: [PATCH v2] mfd: stmpe: move platform data into mfd driver

On Wed, 25 May 2016, Linus Walleij wrote:

> The STMPE platform data is only populated from the device tree
> in all existing users, so push the struct and make the OF case
> the norm.
> 
> Cc: Patrice Chotard <patrice.chotard@...com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> ChangeLog v1->v2:
> - Drop check for (!np) NULL device node: as Lee notices, this
>   can no longer happen on a pure DT driver.
> ---
>  drivers/mfd/stmpe.c       | 40 ++++++++++++++++++++++++++++------------
>  include/linux/mfd/stmpe.h | 22 +---------------------
>  2 files changed, 29 insertions(+), 33 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
> index fb8f9e8b75df..94c7cc02fdab 100644
> --- a/drivers/mfd/stmpe.c
> +++ b/drivers/mfd/stmpe.c
> @@ -23,6 +23,27 @@
>  #include <linux/regulator/consumer.h>
>  #include "stmpe.h"
>  
> +/**
> + * struct stmpe_platform_data - STMPE platform data
> + * @id: device id to distinguish between multiple STMPEs on the same board
> + * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
> + * @irq_trigger: IRQ trigger to use for the interrupt to the host
> + * @autosleep: bool to enable/disable stmpe autosleep
> + * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
> + * @irq_over_gpio: true if gpio is used to get irq
> + * @irq_gpio: gpio number over which irq will be requested (significant only if
> + *	      irq_over_gpio is true)
> + */
> +struct stmpe_platform_data {
> +	int id;
> +	unsigned int blocks;
> +	unsigned int irq_trigger;
> +	bool autosleep;
> +	bool irq_over_gpio;
> +	int irq_gpio;
> +	int autosleep_timeout;
> +};
> +
>  static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
>  {
>  	return stmpe->variant->enable(stmpe, blocks, true);
> @@ -1187,24 +1208,19 @@ static void stmpe_of_probe(struct stmpe_platform_data *pdata,
>  /* Called from client specific probe routines */
>  int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
>  {
> -	struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev);
> +	struct stmpe_platform_data *pdata;
>  	struct device_node *np = ci->dev->of_node;
>  	struct stmpe *stmpe;
>  	int ret;
>  
> -	if (!pdata) {
> -		if (!np)
> -			return -EINVAL;
> -
> -		pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
> -		if (!pdata)
> -			return -ENOMEM;
> +	pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata)
> +		return -ENOMEM;
>  
> -		stmpe_of_probe(pdata, np);
> +	stmpe_of_probe(pdata, np);
>  
> -		if (of_find_property(np, "interrupts", NULL) == NULL)
> -			ci->irq = -1;
> -	}
> +	if (of_find_property(np, "interrupts", NULL) == NULL)
> +		ci->irq = -1;
>  
>  	stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);
>  	if (!stmpe)
> diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
> index cb83883918a7..de748bc7525e 100644
> --- a/include/linux/mfd/stmpe.h
> +++ b/include/linux/mfd/stmpe.h
> @@ -62,6 +62,7 @@ enum {
>  
>  struct stmpe_variant_info;
>  struct stmpe_client_info;
> +struct stmpe_platform_data;
>  
>  /**
>   * struct stmpe - STMPE MFD structure
> @@ -117,25 +118,4 @@ extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
>  
>  #define STMPE_GPIO_NOREQ_811_TOUCH	(0xf0)
>  
> -/**
> - * struct stmpe_platform_data - STMPE platform data
> - * @id: device id to distinguish between multiple STMPEs on the same board
> - * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
> - * @irq_trigger: IRQ trigger to use for the interrupt to the host
> - * @autosleep: bool to enable/disable stmpe autosleep
> - * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
> - * @irq_over_gpio: true if gpio is used to get irq
> - * @irq_gpio: gpio number over which irq will be requested (significant only if
> - *	      irq_over_gpio is true)
> - */
> -struct stmpe_platform_data {
> -	int id;
> -	unsigned int blocks;
> -	unsigned int irq_trigger;
> -	bool autosleep;
> -	bool irq_over_gpio;
> -	int irq_gpio;
> -	int autosleep_timeout;
> -};
> -
>  #endif

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