[PATCH v2 0/3] support watchdog for exynosautov920

[PATCH v2 0/3] support watchdog for exynosautov920

[Taewan Kim]

Add support for the ExynosAutoV920 SoC. Basically this is almost
similar to ExynosAuto V9 or Exynos850 such as two watchdog instance for
each cluster but some CPU configuration are quite different.
Therefore device tree, compatibles and drvdata should be added.

---
Changes in v2:
- Add a space before }
- Fix worng variant condition (cl1 -> cl0)
- Move the location declaring watchdog node
  to the correct location that fits the DTS coding rules
---

Byoungtae Cho (3):
  dt-bindings: watchdog: Document ExynosAutoV920 watchdog bindings
  watchdog: s3c2410_wdt: add support for exynosautov920 SoC
  arm64: dts: exynosautov920: add watchdog DT node

 .../bindings/watchdog/samsung-wdt.yaml        |  3 ++
 .../arm64/boot/dts/exynos/exynosautov920.dtsi | 20 ++++++++++
 drivers/watchdog/s3c2410_wdt.c                | 37 ++++++++++++++++++-
 3 files changed, 59 insertions(+), 1 deletion(-)

-- 
2.46.0

[PATCH v2 1/3] dt-bindings: watchdog: Document ExynosAutoV920 watchdog bindings

[Taewan Kim]

From: Byoungtae Cho <bt.cho@samsung.com>

Add "samsung-exynosautov920-wdt" compatible to the dt-schema
document. ExynosAutoV920 is new SoC for automotive, similar to
exynosautov9 but some CPU configurations are quite different.

Signed-off-by: Byoungtae Cho <bt.cho@samsung.com>
Signed-off-by: Taewan Kim <trunixs.kim@samsung.com>
---
 Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
index 77a5ddd0426e..d175ae968336 100644
--- a/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
+++ b/Documentation/devicetree/bindings/watchdog/samsung-wdt.yaml
@@ -26,6 +26,7 @@ properties:
           - samsung,exynos7-wdt                   # for Exynos7
           - samsung,exynos850-wdt                 # for Exynos850
           - samsung,exynosautov9-wdt              # for Exynosautov9
+          - samsung,exynosautov920-wdt            # for Exynosautov920
       - items:
           - enum:
               - tesla,fsd-wdt
@@ -77,6 +78,7 @@ allOf:
               - samsung,exynos7-wdt
               - samsung,exynos850-wdt
               - samsung,exynosautov9-wdt
+              - samsung,exynosautov920-wdt
     then:
       required:
         - samsung,syscon-phandle
@@ -88,6 +90,7 @@ allOf:
               - google,gs101-wdt
               - samsung,exynos850-wdt
               - samsung,exynosautov9-wdt
+              - samsung,exynosautov920-wdt
     then:
       properties:
         clocks:
-- 
2.46.0

Re: [PATCH v2 1/3] dt-bindings: watchdog: Document ExynosAutoV920 watchdog bindings

[Krzysztof Kozlowski]

On 10/10/2024 13:18, Taewan Kim wrote:
> From: Byoungtae Cho <bt.cho@samsung.com>
> 
> Add "samsung-exynosautov920-wdt" compatible to the dt-schema
> document. ExynosAutoV920 is new SoC for automotive, similar to
> exynosautov9 but some CPU configurations are quite different.
> 
> Signed-off-by: Byoungtae Cho <bt.cho@samsung.com>
> Signed-off-by: Taewan Kim <trunixs.kim@samsung.com>

Shall we do the work twice?

<form letter>
This is a friendly reminder during the review process.

It looks like you received a tag and forgot to add it.

If you do not know the process, here is a short explanation:
Please add Acked-by/Reviewed-by/Tested-by tags when posting new
versions, under or above your Signed-off-by tag. Tag is "received", when
provided in a message replied to you on the mailing list. Tools like b4
can help here. However, there's no need to repost patches *only* to add
the tags. The upstream maintainer will do that for tags received on the
version they apply.

https://elixir.bootlin.com/linux/v6.5-rc3/source/Documentation/process/submitting-patches.rst#L577

If a tag was not added on purpose, please state why and what changed.
</form letter>

Best regards,
Krzysztof

RE: [PATCH v2 1/3] dt-bindings: watchdog: Document ExynosAutoV920 watchdog bindings

[김태완]

> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@kernel.org>
> Sent: Thursday, October 10, 2024 8:47 PM
> To: Taewan Kim <trunixs.kim@samsung.com>; Wim Van Sebroeck <wim@linux-
> watchdog.org>; Guenter Roeck <linux@roeck-us.net>; Rob Herring
> <robh@kernel.org>; Krzysztof Kozlowski <krzk+dt@kernel.org>; Conor Dooley
> <conor+dt@kernel.org>; Alim Akhtar <alim.akhtar@samsung.com>
> Cc: linux-watchdog@vger.kernel.org; devicetree@vger.kernel.org; linux-
> kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-
> samsung-soc@vger.kernel.org; Byoungtae Cho <bt.cho@samsung.com>
> Subject: Re: [PATCH v2 1/3] dt-bindings: watchdog: Document ExynosAutoV920
> watchdog bindings
> 
> On 10/10/2024 13:18, Taewan Kim wrote:
> > From: Byoungtae Cho <bt.cho@samsung.com>
> >
> > Add "samsung-exynosautov920-wdt" compatible to the dt-schema document.
> > ExynosAutoV920 is new SoC for automotive, similar to
> > exynosautov9 but some CPU configurations are quite different.
> >
> > Signed-off-by: Byoungtae Cho <bt.cho@samsung.com>
> > Signed-off-by: Taewan Kim <trunixs.kim@samsung.com>
> 
> Shall we do the work twice?

I missed it by mistake, I'm sorry.
I will push v3 with tags.
> 
> <form letter>
> This is a friendly reminder during the review process.
> 
> It looks like you received a tag and forgot to add it.
> 
> If you do not know the process, here is a short explanation:
> Please add Acked-by/Reviewed-by/Tested-by tags when posting new versions,
> under or above your Signed-off-by tag. Tag is "received", when provided in
> a message replied to you on the mailing list. Tools like b4 can help here.
> However, there's no need to repost patches *only* to add the tags. The
> upstream maintainer will do that for tags received on the version they
> apply.
> 
> https://protect2.fireeye.com/v1/url?k=19c96b19-46525206-19c8e056-
> 000babdfecba-8f51e01dd01bb666&q=1&e=eb401f36-1904-4376-adea-
> 9688adb1d657&u=https%3A%2F%2Felixir.bootlin.com%2Flinux%2Fv6.5-
> rc3%2Fsource%2FDocumentation%2Fprocess%2Fsubmitting-patches.rst%23L577
> 
> If a tag was not added on purpose, please state why and what changed.
> </form letter>
> 
> Best regards,
> Krzysztof

[PATCH v2 2/3] watchdog: s3c2410_wdt: add support for exynosautov920 SoC

[Taewan Kim]

From: Byoungtae Cho <bt.cho@samsung.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@samsung.com>
Signed-off-by: Taewan Kim <trunixs.kim@samsung.com>
---
 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..aa128099c47d 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_cl0)
+				variant = &drv_data_exynosautov920_cl1;
 			break;
 		default:
 			return dev_err_probe(dev, -EINVAL, "wrong cluster index: %u\n", index);
-- 
2.46.0

[PATCH v2 3/3] arm64: dts: exynosautov920: add watchdog DT node

[Taewan Kim]

From: Byoungtae Cho <bt.cho@samsung.com>

Adds two watchdog devices for ExynosAutoV920 SoC.

Signed-off-by: Byoungtae Cho <bt.cho@samsung.com>
Signed-off-by: Taewan Kim <trunixs.kim@samsung.com>
---
 .../arm64/boot/dts/exynos/exynosautov920.dtsi | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
index c1c8566d74f5..3b541d0e9d25 100644
--- a/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynosautov920.dtsi
@@ -182,6 +182,26 @@ chipid@10000000 {
 			reg = <0x10000000 0x24>;
 		};
 
+		watchdog_cl0: watchdog@10060000 {
+			compatible = "samsung,exynosautov920-wdt";
+			reg = <0x10060000 0x100>;
+			interrupts = <GIC_SPI 953 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&xtcxo>, <&xtcxo>;
+			clock-names = "watchdog", "watchdog_src";
+			samsung,syscon-phandle = <&pmu_system_controller>;
+			samsung,cluster-index = <0>;
+		};
+
+		watchdog_cl1: watchdog@10070000 {
+			compatible = "samsung,exynosautov920-wdt";
+			reg = <0x10070000 0x100>;
+			interrupts = <GIC_SPI 952 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&xtcxo>, <&xtcxo>;
+			clock-names = "watchdog", "watchdog_src";
+			samsung,syscon-phandle = <&pmu_system_controller>;
+			samsung,cluster-index = <1>;
+		};
+
 		gic: interrupt-controller@10400000 {
 			compatible = "arm,gic-v3";
 			#interrupt-cells = <3>;
-- 
2.46.0