linux-kernel - Re: [PATCH 5/9] pwm i.MX: add devicetree support

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Message-ID: <20120830222650.GD3613@r65073-Latitude-D630>
Date:	Fri, 31 Aug 2012 06:26:53 +0800
From:	Shawn Guo <shawn.guo@...aro.org>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	linux-arm-kernel@...ts.infradead.org,
	HACHIMI Samir <shachimi@...neo-embedded.com>,
	thierry.reding@...onic-design.de, linux-kernel@...r.kernel.org,
	Benoît Thébaudeau 
	<benoit.thebaudeau@...ansee.com>,
	Philipp Zabel <p.zabel@...gutronix.de>
Subject: Re: [PATCH 5/9] pwm i.MX: add devicetree support

On Tue, Aug 28, 2012 at 01:48:20PM +0200, Sascha Hauer wrote:
> From: Philipp Zabel <p.zabel@...gutronix.de>
> 
> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> ---
>  drivers/pwm/pwm-imx.c |   25 +++++++++++++++++++------
>  1 file changed, 19 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
> index a689144..dfc1bae 100644
> --- a/drivers/pwm/pwm-imx.c
> +++ b/drivers/pwm/pwm-imx.c
> @@ -16,9 +16,9 @@
>  #include <linux/clk.h>
>  #include <linux/io.h>
>  #include <linux/pwm.h>
> +#include <linux/of_device.h>
>  #include <mach/hardware.h>
>  
> -
>  /* i.MX1 and i.MX21 share the same PWM function block: */
>  
>  #define MX1_PWMC    0x00   /* PWM Control Register */
> @@ -203,8 +203,17 @@ static struct pwm_ops imx_pwm_ops = {
>  	.owner = THIS_MODULE,
>  };
>  
> +static const struct of_device_id imx_pwm_dt_ids[] = {
> +	{ .compatible = "fsl,imx1-pwm", .data = &imx_pwm_config_v1, },
> +	{ .compatible = "fsl,imx27-pwm", .data = &imx_pwm_config_v2, },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_pwm_of_match);

s/imx_pwm_of_match/imx_pwm_dt_ids

Regards,
Shawn

> +
>  static int __devinit imx_pwm_probe(struct platform_device *pdev)
>  {
> +	const struct of_device_id *of_id =
> +			of_match_device(imx_pwm_dt_ids, &pdev->dev);
>  	struct imx_chip *imx;
>  	struct resource *r;
>  	int ret = 0;
> @@ -235,12 +244,16 @@ static int __devinit imx_pwm_probe(struct platform_device *pdev)
>  	if (imx->mmio_base == NULL)
>  		return -EADDRNOTAVAIL;
>  
> -	if (cpu_is_mx1() || cpu_is_mx21()) {
> -		imx->config = imx_pwm_config_v1;
> -		imx->set_enable = imx_pwm_set_enable_v1;
> +	if (of_id) {
> +		imx->config = of_id->data;
>  	} else {
> -		imx->config = imx_pwm_config_v2;
> -		imx->set_enable = imx_pwm_set_enable_v2;
> +		if (cpu_is_mx1() || cpu_is_mx21()) {
> +			imx->config = imx_pwm_config_v1;
> +			imx->set_enable = imx_pwm_set_enable_v1;
> +		} else {
> +			imx->config = imx_pwm_config_v2;
> +			imx->set_enable = imx_pwm_set_enable_v2;
> +		}
>  	}
>  
>  	ret = pwmchip_add(&imx->chip);
> -- 
> 1.7.10.4
> 
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