linux-kernel - Re: [PATCH 2/3] watchdog: s3c2410_wdt: add support for exynosautov920 SoC

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Message-ID: <3eaec6e3-c99b-4efb-9456-c157eb484ff3@roeck-us.net>
Date: Mon, 30 Sep 2024 07:51:04 -0700
From: Guenter Roeck <linux@...ck-us.net>
To: Taewan Kim <trunixs.kim@...sung.com>,
 Wim Van Sebroeck <wim@...ux-watchdog.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-samsung-soc@...r.kernel.org, Byoungtae Cho <bt.cho@...sung.com>
Subject: Re: [PATCH 2/3] watchdog: s3c2410_wdt: add support for exynosautov920
 SoC

On 9/13/24 01:03, Taewan Kim wrote:
> From: Byoungtae Cho <bt.cho@...sung.com>
> 
> Adds the compatibles and drvdata for the ExynosAuto V920 SoC. This SoC
> is almost similar to ExynosAutoV9, but some CPU configurations are quite
> different, so it should be added. Plus it also support DBGACK like as
> GS101 SoC.
> 
> Signed-off-by: Byoungtae Cho <bt.cho@...sung.com>
> Signed-off-by: Taewan Kim <trunixs.kim@...sung.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
>   drivers/watchdog/s3c2410_wdt.c | 37 +++++++++++++++++++++++++++++++++-
>   1 file changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
> index 686cf544d0ae..c25133348f0e 100644
> --- a/drivers/watchdog/s3c2410_wdt.c
> +++ b/drivers/watchdog/s3c2410_wdt.c
> @@ -63,6 +63,10 @@
>   #define EXYNOS850_CLUSTER1_NONCPU_INT_EN	0x1644
>   #define EXYNOSAUTOV9_CLUSTER1_NONCPU_OUT	0x1520
>   #define EXYNOSAUTOV9_CLUSTER1_NONCPU_INT_EN	0x1544
> +#define EXYNOSAUTOV920_CLUSTER0_NONCPU_OUT	0x1420
> +#define EXYNOSAUTOV920_CLUSTER0_NONCPU_INT_EN	0x1444
> +#define EXYNOSAUTOV920_CLUSTER1_NONCPU_OUT	0x1720
> +#define EXYNOSAUTOV920_CLUSTER1_NONCPU_INT_EN	0x1744
>   
>   #define EXYNOS850_CLUSTER0_WDTRESET_BIT		24
>   #define EXYNOS850_CLUSTER1_WDTRESET_BIT		23
> @@ -303,6 +307,32 @@ static const struct s3c2410_wdt_variant drv_data_gs101_cl1 = {
>   		  QUIRK_HAS_DBGACK_BIT,
>   };
>   
> +static const struct s3c2410_wdt_variant drv_data_exynosautov920_cl0 = {
> +	.mask_reset_reg = EXYNOSAUTOV920_CLUSTER0_NONCPU_INT_EN,
> +	.mask_bit = 2,
> +	.mask_reset_inv = true,
> +	.rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
> +	.rst_stat_bit = EXYNOSAUTOV9_CLUSTER0_WDTRESET_BIT,
> +	.cnt_en_reg = EXYNOSAUTOV920_CLUSTER0_NONCPU_OUT,
> +	.cnt_en_bit = 7,
> +	.quirks = QUIRK_HAS_WTCLRINT_REG | QUIRK_HAS_PMU_MASK_RESET |
> +		  QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_CNT_EN |
> +		  QUIRK_HAS_DBGACK_BIT,
> +};
> +
> +static const struct s3c2410_wdt_variant drv_data_exynosautov920_cl1 = {
> +	.mask_reset_reg = EXYNOSAUTOV920_CLUSTER1_NONCPU_INT_EN,
> +	.mask_bit = 2,
> +	.mask_reset_inv = true,
> +	.rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
> +	.rst_stat_bit = EXYNOSAUTOV9_CLUSTER1_WDTRESET_BIT,
> +	.cnt_en_reg = EXYNOSAUTOV920_CLUSTER1_NONCPU_OUT,
> +	.cnt_en_bit = 7,
> +	.quirks = QUIRK_HAS_WTCLRINT_REG | QUIRK_HAS_PMU_MASK_RESET |
> +		  QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_CNT_EN |
> +		  QUIRK_HAS_DBGACK_BIT,
> +};
> +
>   static const struct of_device_id s3c2410_wdt_match[] = {
>   	{ .compatible = "google,gs101-wdt",
>   	  .data = &drv_data_gs101_cl0 },
> @@ -320,6 +350,8 @@ static const struct of_device_id s3c2410_wdt_match[] = {
>   	  .data = &drv_data_exynos850_cl0 },
>   	{ .compatible = "samsung,exynosautov9-wdt",
>   	  .data = &drv_data_exynosautov9_cl0 },
> +	{ .compatible = "samsung,exynosautov920-wdt",
> +	  .data = &drv_data_exynosautov920_cl0},
>   	{},
>   };
>   MODULE_DEVICE_TABLE(of, s3c2410_wdt_match);
> @@ -643,7 +675,8 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
>   	/* Choose Exynos850/ExynosAutov9 driver data w.r.t. cluster index */
>   	if (variant == &drv_data_exynos850_cl0 ||
>   	    variant == &drv_data_exynosautov9_cl0 ||
> -	    variant == &drv_data_gs101_cl0) {
> +	    variant == &drv_data_gs101_cl0 ||
> +	    variant == &drv_data_exynosautov920_cl0) {
>   		u32 index;
>   		int err;
>   
> @@ -662,6 +695,8 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
>   				variant = &drv_data_exynosautov9_cl1;
>   			else if (variant == &drv_data_gs101_cl0)
>   				variant = &drv_data_gs101_cl1;
> +			else if (variant == &drv_data_exynosautov920_cl1)
> +				variant = &drv_data_exynosautov920_cl1;
>   			break;
>   		default:
>   			return dev_err_probe(dev, -EINVAL, "wrong cluster index: %u\n", index);