linux-kernel - Re: [PATCH v3 2/2] watchdog: mediatek: mt7988: add wdt support

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Message-ID: <dd9c2e72-c0dd-4e94-9474-a20b4598a0d4@roeck-us.net>
Date:   Mon, 20 Nov 2023 09:19:46 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Daniel Golle <daniel@...rotopia.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v3 2/2] watchdog: mediatek: mt7988: add wdt support

On 11/14/23 09:04, Daniel Golle wrote:
> Add support for watchdog and reset generator unit of the MediaTek
> MT7988 SoC.
> 
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---
> v3: fix wrong function parameter name in kernel-doc comment
> v2: call new toprgu_reset_sw_en_unlocked from toprgu_reset_update while
>      holding lock.
> 
>   drivers/watchdog/mtk_wdt.c | 40 ++++++++++++++++++++++++++++++++++++++
>   1 file changed, 40 insertions(+)
> 
> diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> index b2330b16b497a..3b4ee7185feed 100644
> --- a/drivers/watchdog/mtk_wdt.c
> +++ b/drivers/watchdog/mtk_wdt.c
> @@ -58,6 +58,8 @@
>   #define WDT_SWSYSRST		0x18U
>   #define WDT_SWSYS_RST_KEY	0x88000000
>   
> +#define WDT_SWSYSRST_EN		0xfc
> +
>   #define DRV_NAME		"mtk-wdt"
>   #define DRV_VERSION		"1.0"
>   
> @@ -71,10 +73,12 @@ struct mtk_wdt_dev {
>   	struct reset_controller_dev rcdev;
>   	bool disable_wdt_extrst;
>   	bool reset_by_toprgu;
> +	bool has_swsysrst_en;
>   };
>   
>   struct mtk_wdt_data {
>   	int toprgu_sw_rst_num;
> +	bool has_swsysrst_en;
>   };
>   
>   static const struct mtk_wdt_data mt2712_data = {
> @@ -89,6 +93,11 @@ static const struct mtk_wdt_data mt7986_data = {
>   	.toprgu_sw_rst_num = MT7986_TOPRGU_SW_RST_NUM,
>   };
>   
> +static const struct mtk_wdt_data mt7988_data = {
> +	.toprgu_sw_rst_num = 24,

Kind of odd to have this defined locally, while the others are in include files,
but not worth arguing about. Please make it a define at the top of the file,
though.

Thanks,
Guenter