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SubjectRe: [PATCH v3 10/10] rtc: Add support for the MediaTek MT6358 RTC
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On Fri, 2019-05-03 at 17:31 +0800, Hsin-Hsiung Wang wrote:
> From: Ran Bi <ran.bi@mediatek.com>
>
> This add support for the MediaTek MT6358 RTC. Driver using
> compatible data to store different RTC_WRTGR address offset.
>
> Signed-off-by: Ran Bi <ran.bi@mediatek.com>
> ---
> drivers/rtc/rtc-mt6397.c | 43 ++++++++++++++++++++++++++++++++--------
> 1 file changed, 35 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
> index f85f1fc29e32..3476e29db87c 100644
> --- a/drivers/rtc/rtc-mt6397.c
> +++ b/drivers/rtc/rtc-mt6397.c
> @@ -20,6 +20,7 @@
> #include <linux/irqdomain.h>
> #include <linux/platform_device.h>
> #include <linux/of_address.h>
> +#include <linux/of_device.h>
> #include <linux/of_irq.h>
> #include <linux/io.h>
> #include <linux/mfd/mt6397/core.h>
> @@ -27,7 +28,8 @@
> #define RTC_BBPU 0x0000
> #define RTC_BBPU_CBUSY BIT(6)
>
> -#define RTC_WRTGR 0x003c
> +#define RTC_WRTGR_MT6358 0x3a
> +#define RTC_WRTGR_MT6397 0x3c
>
> #define RTC_IRQ_STA 0x0002
> #define RTC_IRQ_STA_AL BIT(0)
> @@ -71,6 +73,10 @@
> #define RTC_NUM_YEARS 128
> #define RTC_MIN_YEAR_OFFSET (RTC_MIN_YEAR - RTC_BASE_YEAR)
>
> +struct mtk_rtc_compatible {
> + u32 wrtgr_addr;
> +};
> +
> struct mt6397_rtc {
> struct device *dev;
> struct rtc_device *rtc_dev;
> @@ -78,7 +84,25 @@ struct mt6397_rtc {
> struct regmap *regmap;
> int irq;
> u32 addr_base;
> + const struct mtk_rtc_compatible *dev_comp;
> +};
> +
> +static const struct mtk_rtc_compatible mt6358_rtc_compat = {
> + .wrtgr_addr = RTC_WRTGR_MT6358,
> +};
> +
> +static const struct mtk_rtc_compatible mt6397_rtc_compat = {
> + .wrtgr_addr = RTC_WRTGR_MT6397,
> +};
> +
> +static const struct of_device_id mt6397_rtc_of_match[] = {
> + { .compatible = "mediatek,mt6358-rtc",
> + .data = (void *)&mt6358_rtc_compat, },
> + { .compatible = "mediatek,mt6397-rtc",
> + .data = (void *)&mt6397_rtc_compat, },
> + {}
> };
> +MODULE_DEVICE_TABLE(of, mt6397_rtc_of_match);
>
> static int mtk_rtc_write_trigger(struct mt6397_rtc *rtc)
> {
> @@ -86,7 +110,8 @@ static int mtk_rtc_write_trigger(struct mt6397_rtc *rtc)
> int ret;
> u32 data;
>
> - ret = regmap_write(rtc->regmap, rtc->addr_base + RTC_WRTGR, 1);
> + ret = regmap_write(rtc->regmap,
> + rtc->addr_base + rtc->dev_comp->wrtgr_addr, 1);
> if (ret < 0)
> return ret;
>
> @@ -332,6 +357,7 @@ static int mtk_rtc_probe(struct platform_device *pdev)
> struct resource *res;
> struct mt6397_chip *mt6397_chip = dev_get_drvdata(pdev->dev.parent);
> struct mt6397_rtc *rtc;
> + const struct of_device_id *of_id;
> int ret;
>
> rtc = devm_kzalloc(&pdev->dev, sizeof(struct mt6397_rtc), GFP_KERNEL);
> @@ -341,6 +367,13 @@ static int mtk_rtc_probe(struct platform_device *pdev)
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> rtc->addr_base = res->start;
>
> + of_id = of_match_device(mt6397_rtc_of_match, &pdev->dev);
> + if (!of_id) {

This will never happens, but I'm fine with it.

Review-by: Yingjoe Chen <yingjoe.chen@mediatek.com>

Joe.C


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