linux-kernel - Re: [PATCH v7 6/6] rtc: Add support for the MediaTek MT6358 RTC

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Message-ID: <20191211122757.GY1463890@piout.net>
Date:   Wed, 11 Dec 2019 13:27:57 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Tianping Fang <tianping.fang@...iatek.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Josef Friedl <josef.friedl@...ed.at>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Ran Bi <ran.bi@...iatek.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rtc@...r.kernel.org, srv_heupstream@...iatek.com
Subject: Re: [PATCH v7 6/6] rtc: Add support for the MediaTek MT6358 RTC

Hi,

Nitpick, the subject should have been:

rtc: mt6397: Add support for the MediaTek MT6358 RTC

On 11/12/2019 17:43:55+0800, Hsin-Hsiung Wang wrote:
> From: Ran Bi <ran.bi@...iatek.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@...iatek.com>
> Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
> Acked-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
>  drivers/rtc/rtc-mt6397.c       | 24 ++++++++++++++++--------
>  include/linux/mfd/mt6397/rtc.h | 16 +++++++++++++++-
>  2 files changed, 31 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-mt6397.c b/drivers/rtc/rtc-mt6397.c
> index 9135e21..6ca54f9 100644
> --- a/drivers/rtc/rtc-mt6397.c
> +++ b/drivers/rtc/rtc-mt6397.c
> @@ -15,12 +15,24 @@
>  #include <linux/mfd/mt6397/rtc.h>
>  #include <linux/mod_devicetable.h>
>  
> +static const struct of_device_id mt6397_rtc_of_match[] = {
> +	{ .compatible = "mediatek,mt6323-rtc",
> +		.data = (void *)&mt6397_rtc_data, },
> +	{ .compatible = "mediatek,mt6358-rtc",
> +		.data = (void *)&mt6358_rtc_data, },
> +	{ .compatible = "mediatek,mt6397-rtc",
> +		.data = (void *)&mt6397_rtc_data, },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, mt6397_rtc_of_match);
> +
>  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->data->wrtgr, 1);
>  	if (ret < 0)
>  		return ret;
>  
> @@ -269,6 +281,9 @@ static int mtk_rtc_probe(struct platform_device *pdev)
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	rtc->addr_base = res->start;
>  
> +	rtc->data = (struct mtk_rtc_data *)
> +			of_device_get_match_data(&pdev->dev);
> +
>  	rtc->irq = platform_get_irq(pdev, 0);
>  	if (rtc->irq < 0)
>  		return rtc->irq;
> @@ -333,13 +348,6 @@ static int mt6397_rtc_resume(struct device *dev)
>  static SIMPLE_DEV_PM_OPS(mt6397_pm_ops, mt6397_rtc_suspend,
>  			mt6397_rtc_resume);
>  
> -static const struct of_device_id mt6397_rtc_of_match[] = {
> -	{ .compatible = "mediatek,mt6323-rtc", },
> -	{ .compatible = "mediatek,mt6397-rtc", },
> -	{ }
> -};
> -MODULE_DEVICE_TABLE(of, mt6397_rtc_of_match);
> -
>  static struct platform_driver mtk_rtc_driver = {
>  	.driver = {
>  		.name = "mt6397-rtc",
> diff --git a/include/linux/mfd/mt6397/rtc.h b/include/linux/mfd/mt6397/rtc.h
> index 7dfb63b..8810e6f 100644
> --- a/include/linux/mfd/mt6397/rtc.h
> +++ b/include/linux/mfd/mt6397/rtc.h
> @@ -18,7 +18,8 @@
>  #define RTC_BBPU_CBUSY         BIT(6)
>  #define RTC_BBPU_KEY            (0x43 << 8)
>  
> -#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)
> @@ -65,6 +66,10 @@
>  #define MTK_RTC_POLL_DELAY_US  10
>  #define MTK_RTC_POLL_TIMEOUT   (jiffies_to_usecs(HZ))
>  
> +struct mtk_rtc_data {
> +	u32			wrtgr;
> +};
> +
>  struct mt6397_rtc {
>  	struct device           *dev;
>  	struct rtc_device       *rtc_dev;
> @@ -74,6 +79,15 @@ struct mt6397_rtc {
>  	struct regmap           *regmap;
>  	int                     irq;
>  	u32                     addr_base;
> +	const struct mtk_rtc_data *data;
> +};
> +
> +static const struct mtk_rtc_data mt6358_rtc_data = {
> +	.wrtgr = RTC_WRTGR_MT6358,
> +};
> +
> +static const struct mtk_rtc_data mt6397_rtc_data = {
> +	.wrtgr = RTC_WRTGR_MT6397,
>  };
>  
>  #endif /* _LINUX_MFD_MT6397_RTC_H_ */
> -- 
> 2.6.4

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com