linux-kernel - [PATCH 2/2] watchdog: s3c2410_wdt: Add exynos990-wdt compatible data

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Message-Id: <20250217-exynos990-wdt-v1-2-9b49df5256b0@mentallysanemainliners.org>
Date: Mon, 17 Feb 2025 20:05:20 +0100
From: Igor Belwon <igor.belwon@...tallysanemainliners.org>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>, 
 Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, 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, 
 Igor Belwon <igor.belwon@...tallysanemainliners.org>
Subject: [PATCH 2/2] watchdog: s3c2410_wdt: Add exynos990-wdt compatible
 data

The Exynos990 has two watchdog clusters - cl0 and cl2. Add new
driver data for these two clusters, making it possible to use the
watchdog timer on this SoC.

Signed-off-by: Igor Belwon <igor.belwon@...tallysanemainliners.org>
---
 drivers/watchdog/s3c2410_wdt.c | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 30450e99e5e9d40b5596e2f87cc47c80ccbd2ddd..8f406e08d848646348dafabced5bc0f2bbcf49df 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -80,6 +80,10 @@
 #define GS_CLUSTER2_NONCPU_INT_EN		0x1644
 #define GS_RST_STAT_REG_OFFSET			0x3B44
 
+#define EXYNOS990_CLUSTER2_NONCPU_OUT		0x1620
+#define EXYNOS990_CLUSTER2_NONCPU_INT_EN	0x1644
+#define EXYNOS990_CLUSTER2_WDTRESET_BIT		23
+
 /**
  * DOC: Quirk flags for different Samsung watchdog IP-cores
  *
@@ -257,6 +261,32 @@ static const struct s3c2410_wdt_variant drv_data_exynos850_cl1 = {
 		  QUIRK_HAS_PMU_RST_STAT | QUIRK_HAS_PMU_CNT_EN,
 };
 
+static const struct s3c2410_wdt_variant drv_data_exynos990_cl0 = {
+	.mask_reset_reg = GS_CLUSTER0_NONCPU_INT_EN,
+	.mask_bit = 2,
+	.mask_reset_inv = true,
+	.rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
+	.rst_stat_bit = EXYNOS850_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_exynos990_cl2 = {
+	.mask_reset_reg = EXYNOS990_CLUSTER2_NONCPU_INT_EN,
+	.mask_bit = 2,
+	.mask_reset_inv = true,
+	.rst_stat_reg = EXYNOS5_RST_STAT_REG_OFFSET,
+	.rst_stat_bit = EXYNOS990_CLUSTER2_WDTRESET_BIT,
+	.cnt_en_reg = EXYNOS990_CLUSTER2_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_exynosautov9_cl0 = {
 	.mask_reset_reg = EXYNOS850_CLUSTER0_NONCPU_INT_EN,
 	.mask_bit = 2,
@@ -348,6 +378,8 @@ static const struct of_device_id s3c2410_wdt_match[] = {
 	  .data = &drv_data_exynos7 },
 	{ .compatible = "samsung,exynos850-wdt",
 	  .data = &drv_data_exynos850_cl0 },
+	{ .compatible = "samsung,exynos990-wdt",
+	  .data = &drv_data_exynos990_cl0 },
 	{ .compatible = "samsung,exynosautov9-wdt",
 	  .data = &drv_data_exynosautov9_cl0 },
 	{ .compatible = "samsung,exynosautov920-wdt",
@@ -676,7 +708,8 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
 	if (variant == &drv_data_exynos850_cl0 ||
 	    variant == &drv_data_exynosautov9_cl0 ||
 	    variant == &drv_data_gs101_cl0 ||
-	    variant == &drv_data_exynosautov920_cl0) {
+	    variant == &drv_data_exynosautov920_cl0 ||
+	    variant == &drv_data_exynos990_cl0) {
 		u32 index;
 		int err;
 
@@ -698,6 +731,10 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt)
 			else if (variant == &drv_data_exynosautov920_cl0)
 				variant = &drv_data_exynosautov920_cl1;
 			break;
+		case 2:
+			if (variant == &drv_data_exynos990_cl0)
+				variant = &drv_data_exynos990_cl2;
+			break;
 		default:
 			return dev_err_probe(dev, -EINVAL, "wrong cluster index: %u\n", index);
 		}

-- 
2.47.2