Subject: [PATCH 1/3] gpio-twl4030: get platform data from device tree

From: [email-masked] (Vaibhav Hiremath)
Date: Tue, 4 Sep 2012 12:57:16 +0530

On 9/3/2012 7:24 PM, Florian Vaussard wrote:
> Adds a number of missing properties to the device tree of
> twl4030/gpio:
> - "ti,use-leds"  -> .use_leds
> - "ti,debounce"  -> .debounce
> - "ti,mmc-cd"    -> .mmc_cd
> - "ti,pullups"   -> .pullups
> - "ti,pulldowns" -> .pulldowns
> 
> Signed-off-by: Florian Vaussard <[email-masked]>
> ---
>  drivers/gpio/gpio-twl4030.c |   86 +++++++++++++++++++++++++++++-------------
>  1 files changed, 59 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
> index 94256fe..dabe76b 100644
> --- a/drivers/gpio/gpio-twl4030.c
> +++ b/drivers/gpio/gpio-twl4030.c
> @@ -395,6 +395,33 @@ static int __devinit gpio_twl4030_debounce(u32 debounce, u8 mmc_cd)
>  
>  static int gpio_twl4030_remove(struct platform_device *pdev);
>  
> +static struct twl4030_gpio_platform_data *of_gpio_twl4030(struct device *dev)
> +{
> +	struct twl4030_gpio_platform_data *omap_twl_info;
> +	const char *of_use_leds;
> +
> +	omap_twl_info = devm_kzalloc(dev, sizeof(*omap_twl_info), GFP_KERNEL);
> +	if (!omap_twl_info)
> +		return NULL;
> +
> +	omap_twl_info->gpio_base = -1;
> +
> +	of_property_read_string(dev->of_node, "ti,use-leds", &of_use_leds);
> +	if (!strcmp(of_use_leds, "true"))
> +		omap_twl_info->use_leds = true;
> +

You can replace this with

omap_twl_info->use_leds = of_property_read_bool(dev->of_node,
"ti,use-leds");

Otherwise looks OK to me, also I have tested it on OMAP3EVM.

Tested-&-Acked-By: Vaibhav Hiremath <[email-masked]>

Thanks,
Vaibhav
> +	of_property_read_u32(dev->of_node, "ti,debounce",
> +				&omap_twl_info->debounce);
> +	of_property_read_u32(dev->of_node, "ti,mmc-cd",
> +				(u32 *)&omap_twl_info->mmc_cd);
> +	of_property_read_u32(dev->of_node, "ti,pullups",
> +				&omap_twl_info->pullups);
> +	of_property_read_u32(dev->of_node, "ti,pulldowns",
> +				&omap_twl_info->pulldowns);
> +
> +	return omap_twl_info;
> +}
> +
>  static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
>  {
>  	struct twl4030_gpio_platform_data *pdata = pdev->dev.platform_data;
> @@ -423,39 +450,44 @@ static int __devinit gpio_twl4030_probe(struct platform_device *pdev)
>  	twl4030_gpio_irq_base = irq_base;
>  
>  no_irqs:
> -	twl_gpiochip.base = -1;
>  	twl_gpiochip.ngpio = TWL4030_GPIO_MAX;
>  	twl_gpiochip.dev = &pdev->dev;
>  
> -	if (pdata) {
> -		twl_gpiochip.base = pdata->gpio_base;
> +	if (node)
> +		pdata = of_gpio_twl4030(&pdev->dev);
>  
> -		/*
> -		 * NOTE:  boards may waste power if they don't set pullups
> -		 * and pulldowns correctly ... default for non-ULPI pins is
> -		 * pulldown, and some other pins may have external pullups
> -		 * or pulldowns.  Careful!
> -		 */
> -		ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
> -		if (ret)
> -			dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
> -					pdata->pullups, pdata->pulldowns,
> -					ret);
> -
> -		ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd);
> -		if (ret)
> -			dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n",
> -					pdata->debounce, pdata->mmc_cd,
> -					ret);
> -
> -		/*
> -		 * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
> -		 * is (still) clear if use_leds is set.
> -		 */
> -		if (pdata->use_leds)
> -			twl_gpiochip.ngpio += 2;
> +	if (pdata == NULL) {
> +		dev_err(&pdev->dev, "Platform data is missing\n");
> +		return -ENXIO;
>  	}
>  
> +	twl_gpiochip.base = pdata->gpio_base;
> +
> +	/*
> +	 * NOTE:  boards may waste power if they don't set pullups
> +	 * and pulldowns correctly ... default for non-ULPI pins is
> +	 * pulldown, and some other pins may have external pullups
> +	 * or pulldowns.  Careful!
> +	 */
> +	ret = gpio_twl4030_pulls(pdata->pullups, pdata->pulldowns);
> +	if (ret)
> +		dev_dbg(&pdev->dev, "pullups %.05x %.05x --> %d\n",
> +				pdata->pullups, pdata->pulldowns,
> +				ret);
> +
> +	ret = gpio_twl4030_debounce(pdata->debounce, pdata->mmc_cd);
> +	if (ret)
> +		dev_dbg(&pdev->dev, "debounce %.03x %.01x --> %d\n",
> +				pdata->debounce, pdata->mmc_cd,
> +				ret);
> +
> +	/*
> +	 * NOTE: we assume VIBRA_CTL.VIBRA_EN, in MODULE_AUDIO_VOICE,
> +	 * is (still) clear if use_leds is set.
> +	 */
> +	if (pdata->use_leds)
> +		twl_gpiochip.ngpio += 2;
> +
>  	ret = gpiochip_add(&twl_gpiochip);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "could not register gpiochip, %d\n", ret);
>