[rtc-linux] [PATCH v4 4/7] rtc: mxc: add support of device tree

[Alexandre Belloni]

On 04/07/2015 at 01:15:17 +0200, Philippe Reynes wrote :
> Add device tree support for the mxc rtc driver.
> 
> Acked-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>
> Signed-off-by: Philippe Reynes <tremyfr at gmail.com>
Acked-by: Alexandre Belloni <alexandre.belloni at free-electrons.com>

That patch should go after 5/7 to avoid a checkpatch warning.

> ---
>  drivers/rtc/rtc-mxc.c |   19 ++++++++++++++++++-
>  1 files changed, 18 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
> index 4ce7e21..4191a87 100644
> --- a/drivers/rtc/rtc-mxc.c
> +++ b/drivers/rtc/rtc-mxc.c
> @@ -16,6 +16,8 @@
>  #include <linux/interrupt.h>
>  #include <linux/platform_device.h>
>  #include <linux/clk.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
>  
>  #define RTC_INPUT_CLK_32768HZ	(0x00 << 5)
>  #define RTC_INPUT_CLK_32000HZ	(0x01 << 5)
> @@ -98,6 +100,15 @@ static const struct platform_device_id imx_rtc_devtype[] = {
>  };
>  MODULE_DEVICE_TABLE(platform, imx_rtc_devtype);
>  
> +#ifdef CONFIG_OF
> +static const struct of_device_id imx_rtc_dt_ids[] = {
> +	{ .compatible = "fsl,imx1-rtc", .data = (const void *)IMX1_RTC },
> +	{ .compatible = "fsl,imx21-rtc", .data = (const void *)IMX21_RTC },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, imx_rtc_dt_ids);
> +#endif
> +
>  static inline int is_imx1_rtc(struct rtc_plat_data *data)
>  {
>  	return data->devtype == IMX1_RTC;
> @@ -362,12 +373,17 @@ static int mxc_rtc_probe(struct platform_device *pdev)
>  	u32 reg;
>  	unsigned long rate;
>  	int ret;
> +	const struct of_device_id *of_id;
>  
>  	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
>  	if (!pdata)
>  		return -ENOMEM;
>  
> -	pdata->devtype = pdev->id_entry->driver_data;
> +	of_id = of_match_device(imx_rtc_dt_ids, &pdev->dev);
> +	if (of_id)
> +		pdata->devtype = (enum imx_rtc_type)of_id->data;
> +	else
> +		pdata->devtype = pdev->id_entry->driver_data;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
> @@ -488,6 +504,7 @@ static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume);
>  static struct platform_driver mxc_rtc_driver = {
>  	.driver = {
>  		   .name	= "mxc_rtc",
> +		   .of_match_table = of_match_ptr(imx_rtc_dt_ids),
>  		   .pm		= &mxc_rtc_pm_ops,
>  	},
>  	.id_table = imx_rtc_devtype,
> -- 
> 1.7.4.4
> 
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-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com