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* [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback
@ 2020-01-15  8:58 Yong Liang
  2020-01-15  8:58 ` [PATCH v12 1/4] dt-bindings: mediatek: mt8183: Add #reset-cells Yong Liang
                   ` (3 more replies)
  0 siblings, 4 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-15  8:58 UTC (permalink / raw)
  To: yong.liang, wim, linux, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

From: "yong.liang" <yong.liang@mediatek.com>

This series patches add reset controller for MT8183 and MT2712, and audio will use it in 
machine driver during bootup, they depend on the for-next.

v12 changes:
1. Split MT2712 from MT8183 for mtk-wdt.txt

v11 changes:
1. Create a new patch for MT2712.

v10 changes:
1. Modify mtk-wdt.txt dt-bindings.

v9 changes:
1. Remove Change-Id.

v8 changes:
1. Delete cast: (struct mtk_wdt_data *)

v7 changes:
1. Delete no use code.

v6 changes:
1. Simplify toprug_reset_assert() & toprug_reset_deassert().
2. Add members for mt2712_data & mt8183_data.

v5 changes:
1. Add Signed-off-by tag and Reviewed-by tag.

v4 changes:
1. Fixed wrong signed-off as correct mail suffix.
2. Fixed patch subject that add patch version.

v3 changes:
1. https://patchwork.kernel.org/patch/11164283/ and 
  https://patchwork.kernel.org/patch/11164305/ has been merged.
2. Change the name of mtk_wdt_compatible to mtk_wdt_data.
3. Remove toprgu_reset struct and use mtk_wdt_dev instead.
4. Get the value of sw_rst_num from .h file.
5. Adddd mt2712-resets.h for mt2712.
6. Improve commit message.

v2 changes:
1. remove "WIP" that in the title of patches
2. add hyper link for the patch that depends on
3. patchwork list:
https://patchwork.kernel.org/cover/11164285/
https://patchwork.kernel.org/patch/11164295/
https://patchwork.kernel.org/patch/11164299/
https://patchwork.kernel.org/patch/11164283/
https://patchwork.kernel.org/patch/11164305/

v1 changes:
1. patchwork list:
https://patchwork.kernel.org/cover/11164173/
https://patchwork.kernel.org/patch/11164181/
https://patchwork.kernel.org/patch/11164185/
https://patchwork.kernel.org/patch/11164187/
https://patchwork.kernel.org/patch/11164175/

yong.liang (4):
  dt-bindings: mediatek: mt8183: Add #reset-cells
  dt-bindings: mediatek: mt2712: Add #reset-cells
  watchdog: mtk_wdt: mt8183: Add reset controller
  watchdog: mtk_wdt: mt2712: Add reset controller

 .../devicetree/bindings/watchdog/mtk-wdt.txt  |  11 +-
 drivers/watchdog/mtk_wdt.c                    | 105 +++++++++++++++++-
 .../reset-controller/mt2712-resets.h          |  22 ++++
 .../reset-controller/mt8183-resets.h          |  17 +++
 4 files changed, 151 insertions(+), 4 deletions(-)
 create mode 100644 include/dt-bindings/reset-controller/mt2712-resets.h

-- 
2.18.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v12 1/4] dt-bindings: mediatek: mt8183: Add #reset-cells
  2020-01-15  8:58 [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback Yong Liang
@ 2020-01-15  8:58 ` Yong Liang
  2020-01-15  8:58 ` [PATCH v12 2/4] dt-bindings: mediatek: mt2712: " Yong Liang
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-15  8:58 UTC (permalink / raw)
  To: yong.liang, wim, linux, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

From: "yong.liang" <yong.liang@mediatek.com>

Add #reset-cells property and update example

Signed-off-by: yong.liang <yong.liang@mediatek.com>
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <groeck7@gmail.com>
---
 .../devicetree/bindings/watchdog/mtk-wdt.txt    | 10 +++++++---
 .../reset-controller/mt8183-resets.h            | 17 +++++++++++++++++
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
index fd380eb28df5..ecb9ff784832 100644
--- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
@@ -9,17 +9,21 @@ Required properties:
 	"mediatek,mt7622-wdt", "mediatek,mt6589-wdt": for MT7622
 	"mediatek,mt7623-wdt", "mediatek,mt6589-wdt": for MT7623
 	"mediatek,mt7629-wdt", "mediatek,mt6589-wdt": for MT7629
+	"mediatek,mt8183-wdt", "mediatek,mt6589-wdt": for MT8183
 	"mediatek,mt8516-wdt", "mediatek,mt6589-wdt": for MT8516
 
 - reg : Specifies base physical address and size of the registers.
 
 Optional properties:
 - timeout-sec: contains the watchdog timeout in seconds.
+- #reset-cells: Should be 1.
 
 Example:
 
-wdt: watchdog@10000000 {
-	compatible = "mediatek,mt6589-wdt";
-	reg = <0x10000000 0x18>;
+watchdog: watchdog@10007000 {
+	compatible = "mediatek,mt8183-wdt",
+		     "mediatek,mt6589-wdt";
+	reg = <0 0x10007000 0 0x100>;
 	timeout-sec = <10>;
+	#reset-cells = <1>;
 };
diff --git a/include/dt-bindings/reset-controller/mt8183-resets.h b/include/dt-bindings/reset-controller/mt8183-resets.h
index 8804e34ebdd4..a1bbd41e0d12 100644
--- a/include/dt-bindings/reset-controller/mt8183-resets.h
+++ b/include/dt-bindings/reset-controller/mt8183-resets.h
@@ -78,4 +78,21 @@
 #define MT8183_INFRACFG_AO_I2C7_SW_RST				126
 #define MT8183_INFRACFG_AO_I2C8_SW_RST				127
 
+#define MT8183_INFRACFG_SW_RST_NUM				128
+
+#define MT8183_TOPRGU_MM_SW_RST					1
+#define MT8183_TOPRGU_MFG_SW_RST				2
+#define MT8183_TOPRGU_VENC_SW_RST				3
+#define MT8183_TOPRGU_VDEC_SW_RST				4
+#define MT8183_TOPRGU_IMG_SW_RST				5
+#define MT8183_TOPRGU_MD_SW_RST					7
+#define MT8183_TOPRGU_CONN_SW_RST				9
+#define MT8183_TOPRGU_CONN_MCU_SW_RST				12
+#define MT8183_TOPRGU_IPU0_SW_RST				14
+#define MT8183_TOPRGU_IPU1_SW_RST				15
+#define MT8183_TOPRGU_AUDIO_SW_RST				17
+#define MT8183_TOPRGU_CAMSYS_SW_RST				18
+
+#define MT8183_TOPRGU_SW_RST_NUM				19
+
 #endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT8183 */
-- 
2.18.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v12 2/4] dt-bindings: mediatek: mt2712: Add #reset-cells
  2020-01-15  8:58 [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback Yong Liang
  2020-01-15  8:58 ` [PATCH v12 1/4] dt-bindings: mediatek: mt8183: Add #reset-cells Yong Liang
@ 2020-01-15  8:58 ` " Yong Liang
  2020-01-15  8:58 ` [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Yong Liang
  2020-01-15  8:58 ` [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: " Yong Liang
  3 siblings, 0 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-15  8:58 UTC (permalink / raw)
  To: yong.liang, wim, linux, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

From: "yong.liang" <yong.liang@mediatek.com>

Add #reset-cells and update mtk-wdt.txt

Signed-off-by: yong.liang <yong.liang@mediatek.com>
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Guenter Roeck <groeck7@gmail.com>
---
 .../devicetree/bindings/watchdog/mtk-wdt.txt  |  1 +
 .../reset-controller/mt2712-resets.h          | 22 +++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 include/dt-bindings/reset-controller/mt2712-resets.h

diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
index ecb9ff784832..4dd36bd3f1ad 100644
--- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
@@ -4,6 +4,7 @@ Required properties:
 
 - compatible should contain:
 	"mediatek,mt2701-wdt", "mediatek,mt6589-wdt": for MT2701
+	"mediatek,mt2712-wdt", "mediatek,mt6589-wdt": for MT2712
 	"mediatek,mt6589-wdt": for MT6589
 	"mediatek,mt6797-wdt", "mediatek,mt6589-wdt": for MT6797
 	"mediatek,mt7622-wdt", "mediatek,mt6589-wdt": for MT7622
diff --git a/include/dt-bindings/reset-controller/mt2712-resets.h b/include/dt-bindings/reset-controller/mt2712-resets.h
new file mode 100644
index 000000000000..9e7ee762f076
--- /dev/null
+++ b/include/dt-bindings/reset-controller/mt2712-resets.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2019 MediaTek Inc.
+ * Author: Yong Liang <yong.liang@mediatek.com>
+ */
+
+#ifndef _DT_BINDINGS_RESET_CONTROLLER_MT2712
+#define _DT_BINDINGS_RESET_CONTROLLER_MT2712
+
+#define MT2712_TOPRGU_INFRA_SW_RST				0
+#define MT2712_TOPRGU_MM_SW_RST					1
+#define MT2712_TOPRGU_MFG_SW_RST				2
+#define MT2712_TOPRGU_VENC_SW_RST				3
+#define MT2712_TOPRGU_VDEC_SW_RST				4
+#define MT2712_TOPRGU_IMG_SW_RST				5
+#define MT2712_TOPRGU_INFRA_AO_SW_RST				8
+#define MT2712_TOPRGU_USB_SW_RST				9
+#define MT2712_TOPRGU_APMIXED_SW_RST				10
+
+#define MT2712_TOPRGU_SW_RST_NUM				11
+
+#endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT2712 */
-- 
2.18.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller
  2020-01-15  8:58 [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback Yong Liang
  2020-01-15  8:58 ` [PATCH v12 1/4] dt-bindings: mediatek: mt8183: Add #reset-cells Yong Liang
  2020-01-15  8:58 ` [PATCH v12 2/4] dt-bindings: mediatek: mt2712: " Yong Liang
@ 2020-01-15  8:58 ` Yong Liang
  2020-01-15 13:47   ` Guenter Roeck
  2020-01-15 16:18   ` Matthias Brugger
  2020-01-15  8:58 ` [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: " Yong Liang
  3 siblings, 2 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-15  8:58 UTC (permalink / raw)
  To: yong.liang, wim, linux, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

From: "yong.liang" <yong.liang@mediatek.com>

Add reset controller API in watchdog driver.
Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
camera, codec and connectivity) software reset functionality.

Signed-off-by: yong.liang <yong.liang@mediatek.com>
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/watchdog/mtk_wdt.c | 99 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 98 insertions(+), 1 deletion(-)

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 9c3d0033260d..e88aacb0404d 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -9,6 +9,8 @@
  * Based on sunxi_wdt.c
  */
 
+#include <dt-bindings/reset-controller/mt8183-resets.h>
+#include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/io.h>
@@ -16,10 +18,11 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
+#include <linux/reset-controller.h>
 #include <linux/types.h>
 #include <linux/watchdog.h>
-#include <linux/delay.h>
 
 #define WDT_MAX_TIMEOUT		31
 #define WDT_MIN_TIMEOUT		1
@@ -44,6 +47,9 @@
 #define WDT_SWRST		0x14
 #define WDT_SWRST_KEY		0x1209
 
+#define WDT_SWSYSRST		0x18U
+#define WDT_SWSYS_RST_KEY	0x88000000
+
 #define DRV_NAME		"mtk-wdt"
 #define DRV_VERSION		"1.0"
 
@@ -53,8 +59,90 @@ static unsigned int timeout;
 struct mtk_wdt_dev {
 	struct watchdog_device wdt_dev;
 	void __iomem *wdt_base;
+	spinlock_t lock; /* protects WDT_SWSYSRST reg */
+	struct reset_controller_dev rcdev;
+};
+
+struct mtk_wdt_data {
+	int toprgu_sw_rst_num;
 };
 
+static const struct mtk_wdt_data mt8183_data = {
+	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
+};
+
+static int toprgu_reset_update(struct reset_controller_dev *rcdev,
+			       unsigned long id, bool assert)
+{
+	unsigned int tmp;
+	unsigned long flags;
+	struct mtk_wdt_dev *data =
+		 container_of(rcdev, struct mtk_wdt_dev, rcdev);
+
+	spin_lock_irqsave(&data->lock, flags);
+
+	tmp = readl(data->wdt_base + WDT_SWSYSRST);
+	if (assert)
+		tmp |= BIT(id);
+	else
+		tmp &= ~BIT(id);
+	tmp |= WDT_SWSYS_RST_KEY;
+	writel(tmp, data->wdt_base + WDT_SWSYSRST);
+
+	spin_unlock_irqrestore(&data->lock, flags);
+
+	return 0;
+}
+
+static int toprgu_reset_assert(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	return toprgu_reset_update(rcdev, id, true);
+}
+
+static int toprgu_reset_deassert(struct reset_controller_dev *rcdev,
+				 unsigned long id)
+{
+	return toprgu_reset_update(rcdev, id, false);
+}
+
+static int toprgu_reset(struct reset_controller_dev *rcdev,
+			unsigned long id)
+{
+	int ret;
+
+	ret = toprgu_reset_assert(rcdev, id);
+	if (ret)
+		return ret;
+
+	return toprgu_reset_deassert(rcdev, id);
+}
+
+static const struct reset_control_ops toprgu_reset_ops = {
+	.assert = toprgu_reset_assert,
+	.deassert = toprgu_reset_deassert,
+	.reset = toprgu_reset,
+};
+
+static int toprgu_register_reset_controller(struct platform_device *pdev,
+					    int rst_num)
+{
+	int ret;
+	struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
+
+	spin_lock_init(&mtk_wdt->lock);
+
+	mtk_wdt->rcdev.owner = THIS_MODULE;
+	mtk_wdt->rcdev.nr_resets = rst_num;
+	mtk_wdt->rcdev.ops = &toprgu_reset_ops;
+	mtk_wdt->rcdev.of_node = pdev->dev.of_node;
+	ret = devm_reset_controller_register(&pdev->dev, &mtk_wdt->rcdev);
+	if (ret != 0)
+		dev_err(&pdev->dev,
+			"couldn't register wdt reset controller: %d\n", ret);
+	return ret;
+}
+
 static int mtk_wdt_restart(struct watchdog_device *wdt_dev,
 			   unsigned long action, void *data)
 {
@@ -155,6 +243,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_wdt_dev *mtk_wdt;
+	const struct mtk_wdt_data *wdt_data;
 	int err;
 
 	mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL);
@@ -190,6 +279,13 @@ static int mtk_wdt_probe(struct platform_device *pdev)
 	dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
 		 mtk_wdt->wdt_dev.timeout, nowayout);
 
+	wdt_data = of_device_get_match_data(dev);
+	if (wdt_data) {
+		err = toprgu_register_reset_controller(pdev,
+						       wdt_data->toprgu_sw_rst_num);
+		if (err)
+			return err;
+	}
 	return 0;
 }
 
@@ -219,6 +315,7 @@ static int mtk_wdt_resume(struct device *dev)
 
 static const struct of_device_id mtk_wdt_dt_ids[] = {
 	{ .compatible = "mediatek,mt6589-wdt" },
+	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
-- 
2.18.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

* [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: Add reset controller
  2020-01-15  8:58 [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback Yong Liang
                   ` (2 preceding siblings ...)
  2020-01-15  8:58 ` [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Yong Liang
@ 2020-01-15  8:58 ` " Yong Liang
  2020-01-15 16:18   ` Matthias Brugger
  3 siblings, 1 reply; 10+ messages in thread
From: Yong Liang @ 2020-01-15  8:58 UTC (permalink / raw)
  To: yong.liang, wim, linux, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

From: "yong.liang" <yong.liang@mediatek.com>

Add reset controller for 2712.
Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
camera, codec and connectivity) software reset functionality.

Signed-off-by: yong.liang <yong.liang@mediatek.com>
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 drivers/watchdog/mtk_wdt.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index e88aacb0404d..d6a6393f609d 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -9,6 +9,7 @@
  * Based on sunxi_wdt.c
  */
 
+#include <dt-bindings/reset-controller/mt2712-resets.h>
 #include <dt-bindings/reset-controller/mt8183-resets.h>
 #include <linux/delay.h>
 #include <linux/err.h>
@@ -67,6 +68,10 @@ struct mtk_wdt_data {
 	int toprgu_sw_rst_num;
 };
 
+static const struct mtk_wdt_data mt2712_data = {
+	.toprgu_sw_rst_num = MT2712_TOPRGU_SW_RST_NUM,
+};
+
 static const struct mtk_wdt_data mt8183_data = {
 	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
 };
@@ -314,6 +319,7 @@ static int mtk_wdt_resume(struct device *dev)
 #endif
 
 static const struct of_device_id mtk_wdt_dt_ids[] = {
+	{ .compatible = "mediatek,mt2712-wdt", .data = &mt2712_data },
 	{ .compatible = "mediatek,mt6589-wdt" },
 	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
 	{ /* sentinel */ }
-- 
2.18.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller
  2020-01-15  8:58 ` [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Yong Liang
@ 2020-01-15 13:47   ` Guenter Roeck
  2020-01-15 16:18   ` Matthias Brugger
  1 sibling, 0 replies; 10+ messages in thread
From: Guenter Roeck @ 2020-01-15 13:47 UTC (permalink / raw)
  To: Yong Liang, wim, p.zabel, matthias.bgg, linux-watchdog,
	linux-kernel, linux-arm-kernel, linux-mediatek, devicetree,
	chang-an.chen, freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd

On 1/15/20 12:58 AM, Yong Liang wrote:
> From: "yong.liang" <yong.liang@mediatek.com>
> 
> Add reset controller API in watchdog driver.
> Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
> camera, codec and connectivity) software reset functionality.
> 
> Signed-off-by: yong.liang <yong.liang@mediatek.com>
> Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>

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

> ---
>   drivers/watchdog/mtk_wdt.c | 99 +++++++++++++++++++++++++++++++++++++-
>   1 file changed, 98 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> index 9c3d0033260d..e88aacb0404d 100644
> --- a/drivers/watchdog/mtk_wdt.c
> +++ b/drivers/watchdog/mtk_wdt.c
> @@ -9,6 +9,8 @@
>    * Based on sunxi_wdt.c
>    */
>   
> +#include <dt-bindings/reset-controller/mt8183-resets.h>
> +#include <linux/delay.h>
>   #include <linux/err.h>
>   #include <linux/init.h>
>   #include <linux/io.h>
> @@ -16,10 +18,11 @@
>   #include <linux/module.h>
>   #include <linux/moduleparam.h>
>   #include <linux/of.h>
> +#include <linux/of_device.h>
>   #include <linux/platform_device.h>
> +#include <linux/reset-controller.h>
>   #include <linux/types.h>
>   #include <linux/watchdog.h>
> -#include <linux/delay.h>
>   
>   #define WDT_MAX_TIMEOUT		31
>   #define WDT_MIN_TIMEOUT		1
> @@ -44,6 +47,9 @@
>   #define WDT_SWRST		0x14
>   #define WDT_SWRST_KEY		0x1209
>   
> +#define WDT_SWSYSRST		0x18U
> +#define WDT_SWSYS_RST_KEY	0x88000000
> +
>   #define DRV_NAME		"mtk-wdt"
>   #define DRV_VERSION		"1.0"
>   
> @@ -53,8 +59,90 @@ static unsigned int timeout;
>   struct mtk_wdt_dev {
>   	struct watchdog_device wdt_dev;
>   	void __iomem *wdt_base;
> +	spinlock_t lock; /* protects WDT_SWSYSRST reg */
> +	struct reset_controller_dev rcdev;
> +};
> +
> +struct mtk_wdt_data {
> +	int toprgu_sw_rst_num;
>   };
>   
> +static const struct mtk_wdt_data mt8183_data = {
> +	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
> +};
> +
> +static int toprgu_reset_update(struct reset_controller_dev *rcdev,
> +			       unsigned long id, bool assert)
> +{
> +	unsigned int tmp;
> +	unsigned long flags;
> +	struct mtk_wdt_dev *data =
> +		 container_of(rcdev, struct mtk_wdt_dev, rcdev);
> +
> +	spin_lock_irqsave(&data->lock, flags);
> +
> +	tmp = readl(data->wdt_base + WDT_SWSYSRST);
> +	if (assert)
> +		tmp |= BIT(id);
> +	else
> +		tmp &= ~BIT(id);
> +	tmp |= WDT_SWSYS_RST_KEY;
> +	writel(tmp, data->wdt_base + WDT_SWSYSRST);
> +
> +	spin_unlock_irqrestore(&data->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int toprgu_reset_assert(struct reset_controller_dev *rcdev,
> +			       unsigned long id)
> +{
> +	return toprgu_reset_update(rcdev, id, true);
> +}
> +
> +static int toprgu_reset_deassert(struct reset_controller_dev *rcdev,
> +				 unsigned long id)
> +{
> +	return toprgu_reset_update(rcdev, id, false);
> +}
> +
> +static int toprgu_reset(struct reset_controller_dev *rcdev,
> +			unsigned long id)
> +{
> +	int ret;
> +
> +	ret = toprgu_reset_assert(rcdev, id);
> +	if (ret)
> +		return ret;
> +
> +	return toprgu_reset_deassert(rcdev, id);
> +}
> +
> +static const struct reset_control_ops toprgu_reset_ops = {
> +	.assert = toprgu_reset_assert,
> +	.deassert = toprgu_reset_deassert,
> +	.reset = toprgu_reset,
> +};
> +
> +static int toprgu_register_reset_controller(struct platform_device *pdev,
> +					    int rst_num)
> +{
> +	int ret;
> +	struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
> +
> +	spin_lock_init(&mtk_wdt->lock);
> +
> +	mtk_wdt->rcdev.owner = THIS_MODULE;
> +	mtk_wdt->rcdev.nr_resets = rst_num;
> +	mtk_wdt->rcdev.ops = &toprgu_reset_ops;
> +	mtk_wdt->rcdev.of_node = pdev->dev.of_node;
> +	ret = devm_reset_controller_register(&pdev->dev, &mtk_wdt->rcdev);
> +	if (ret != 0)
> +		dev_err(&pdev->dev,
> +			"couldn't register wdt reset controller: %d\n", ret);
> +	return ret;
> +}
> +
>   static int mtk_wdt_restart(struct watchdog_device *wdt_dev,
>   			   unsigned long action, void *data)
>   {
> @@ -155,6 +243,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
>   {
>   	struct device *dev = &pdev->dev;
>   	struct mtk_wdt_dev *mtk_wdt;
> +	const struct mtk_wdt_data *wdt_data;
>   	int err;
>   
>   	mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL);
> @@ -190,6 +279,13 @@ static int mtk_wdt_probe(struct platform_device *pdev)
>   	dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
>   		 mtk_wdt->wdt_dev.timeout, nowayout);
>   
> +	wdt_data = of_device_get_match_data(dev);
> +	if (wdt_data) {
> +		err = toprgu_register_reset_controller(pdev,
> +						       wdt_data->toprgu_sw_rst_num);
> +		if (err)
> +			return err;
> +	}
>   	return 0;
>   }
>   
> @@ -219,6 +315,7 @@ static int mtk_wdt_resume(struct device *dev)
>   
>   static const struct of_device_id mtk_wdt_dt_ids[] = {
>   	{ .compatible = "mediatek,mt6589-wdt" },
> +	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
>   	{ /* sentinel */ }
>   };
>   MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
> 


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller
  2020-01-15  8:58 ` [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Yong Liang
  2020-01-15 13:47   ` Guenter Roeck
@ 2020-01-15 16:18   ` Matthias Brugger
  2020-01-19  3:22     ` Yong Liang
  1 sibling, 1 reply; 10+ messages in thread
From: Matthias Brugger @ 2020-01-15 16:18 UTC (permalink / raw)
  To: Yong Liang, wim, linux, p.zabel, linux-watchdog, linux-kernel,
	linux-arm-kernel, linux-mediatek, devicetree, chang-an.chen,
	freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd



On 15/01/2020 09:58, Yong Liang wrote:
> From: "yong.liang" <yong.liang@mediatek.com>
> 
> Add reset controller API in watchdog driver.
> Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
> camera, codec and connectivity) software reset functionality.
> 
> Signed-off-by: yong.liang <yong.liang@mediatek.com>
> Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>

Acked-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>  drivers/watchdog/mtk_wdt.c | 99 +++++++++++++++++++++++++++++++++++++-
>  1 file changed, 98 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> index 9c3d0033260d..e88aacb0404d 100644
> --- a/drivers/watchdog/mtk_wdt.c
> +++ b/drivers/watchdog/mtk_wdt.c
> @@ -9,6 +9,8 @@
>   * Based on sunxi_wdt.c
>   */
>  
> +#include <dt-bindings/reset-controller/mt8183-resets.h>
> +#include <linux/delay.h>
>  #include <linux/err.h>
>  #include <linux/init.h>
>  #include <linux/io.h>
> @@ -16,10 +18,11 @@
>  #include <linux/module.h>
>  #include <linux/moduleparam.h>
>  #include <linux/of.h>
> +#include <linux/of_device.h>
>  #include <linux/platform_device.h>
> +#include <linux/reset-controller.h>
>  #include <linux/types.h>
>  #include <linux/watchdog.h>
> -#include <linux/delay.h>
>  
>  #define WDT_MAX_TIMEOUT		31
>  #define WDT_MIN_TIMEOUT		1
> @@ -44,6 +47,9 @@
>  #define WDT_SWRST		0x14
>  #define WDT_SWRST_KEY		0x1209
>  
> +#define WDT_SWSYSRST		0x18U
> +#define WDT_SWSYS_RST_KEY	0x88000000
> +
>  #define DRV_NAME		"mtk-wdt"
>  #define DRV_VERSION		"1.0"
>  
> @@ -53,8 +59,90 @@ static unsigned int timeout;
>  struct mtk_wdt_dev {
>  	struct watchdog_device wdt_dev;
>  	void __iomem *wdt_base;
> +	spinlock_t lock; /* protects WDT_SWSYSRST reg */
> +	struct reset_controller_dev rcdev;
> +};
> +
> +struct mtk_wdt_data {
> +	int toprgu_sw_rst_num;
>  };
>  
> +static const struct mtk_wdt_data mt8183_data = {
> +	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
> +};
> +
> +static int toprgu_reset_update(struct reset_controller_dev *rcdev,
> +			       unsigned long id, bool assert)
> +{
> +	unsigned int tmp;
> +	unsigned long flags;
> +	struct mtk_wdt_dev *data =
> +		 container_of(rcdev, struct mtk_wdt_dev, rcdev);
> +
> +	spin_lock_irqsave(&data->lock, flags);
> +
> +	tmp = readl(data->wdt_base + WDT_SWSYSRST);
> +	if (assert)
> +		tmp |= BIT(id);
> +	else
> +		tmp &= ~BIT(id);
> +	tmp |= WDT_SWSYS_RST_KEY;
> +	writel(tmp, data->wdt_base + WDT_SWSYSRST);
> +
> +	spin_unlock_irqrestore(&data->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int toprgu_reset_assert(struct reset_controller_dev *rcdev,
> +			       unsigned long id)
> +{
> +	return toprgu_reset_update(rcdev, id, true);
> +}
> +
> +static int toprgu_reset_deassert(struct reset_controller_dev *rcdev,
> +				 unsigned long id)
> +{
> +	return toprgu_reset_update(rcdev, id, false);
> +}
> +
> +static int toprgu_reset(struct reset_controller_dev *rcdev,
> +			unsigned long id)
> +{
> +	int ret;
> +
> +	ret = toprgu_reset_assert(rcdev, id);
> +	if (ret)
> +		return ret;
> +
> +	return toprgu_reset_deassert(rcdev, id);
> +}
> +
> +static const struct reset_control_ops toprgu_reset_ops = {
> +	.assert = toprgu_reset_assert,
> +	.deassert = toprgu_reset_deassert,
> +	.reset = toprgu_reset,
> +};
> +
> +static int toprgu_register_reset_controller(struct platform_device *pdev,
> +					    int rst_num)
> +{
> +	int ret;
> +	struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
> +
> +	spin_lock_init(&mtk_wdt->lock);
> +
> +	mtk_wdt->rcdev.owner = THIS_MODULE;
> +	mtk_wdt->rcdev.nr_resets = rst_num;
> +	mtk_wdt->rcdev.ops = &toprgu_reset_ops;
> +	mtk_wdt->rcdev.of_node = pdev->dev.of_node;
> +	ret = devm_reset_controller_register(&pdev->dev, &mtk_wdt->rcdev);
> +	if (ret != 0)
> +		dev_err(&pdev->dev,
> +			"couldn't register wdt reset controller: %d\n", ret);
> +	return ret;
> +}
> +
>  static int mtk_wdt_restart(struct watchdog_device *wdt_dev,
>  			   unsigned long action, void *data)
>  {
> @@ -155,6 +243,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct mtk_wdt_dev *mtk_wdt;
> +	const struct mtk_wdt_data *wdt_data;
>  	int err;
>  
>  	mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL);
> @@ -190,6 +279,13 @@ static int mtk_wdt_probe(struct platform_device *pdev)
>  	dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
>  		 mtk_wdt->wdt_dev.timeout, nowayout);
>  
> +	wdt_data = of_device_get_match_data(dev);
> +	if (wdt_data) {
> +		err = toprgu_register_reset_controller(pdev,
> +						       wdt_data->toprgu_sw_rst_num);
> +		if (err)
> +			return err;
> +	}
>  	return 0;
>  }
>  
> @@ -219,6 +315,7 @@ static int mtk_wdt_resume(struct device *dev)
>  
>  static const struct of_device_id mtk_wdt_dt_ids[] = {
>  	{ .compatible = "mediatek,mt6589-wdt" },
> +	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
>  	{ /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
> 

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: Add reset controller
  2020-01-15  8:58 ` [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: " Yong Liang
@ 2020-01-15 16:18   ` Matthias Brugger
  2020-01-19  3:21     ` Yong Liang
  0 siblings, 1 reply; 10+ messages in thread
From: Matthias Brugger @ 2020-01-15 16:18 UTC (permalink / raw)
  To: Yong Liang, wim, linux, p.zabel, linux-watchdog, linux-kernel,
	linux-arm-kernel, linux-mediatek, devicetree, chang-an.chen,
	freddy.hsin, jiaxin.yu
  Cc: yingjoe.chen, sboyd



On 15/01/2020 09:58, Yong Liang wrote:
> From: "yong.liang" <yong.liang@mediatek.com>
> 
> Add reset controller for 2712.
> Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
> camera, codec and connectivity) software reset functionality.
> 
> Signed-off-by: yong.liang <yong.liang@mediatek.com>
> Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>

Acked-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>  drivers/watchdog/mtk_wdt.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> index e88aacb0404d..d6a6393f609d 100644
> --- a/drivers/watchdog/mtk_wdt.c
> +++ b/drivers/watchdog/mtk_wdt.c
> @@ -9,6 +9,7 @@
>   * Based on sunxi_wdt.c
>   */
>  
> +#include <dt-bindings/reset-controller/mt2712-resets.h>
>  #include <dt-bindings/reset-controller/mt8183-resets.h>
>  #include <linux/delay.h>
>  #include <linux/err.h>
> @@ -67,6 +68,10 @@ struct mtk_wdt_data {
>  	int toprgu_sw_rst_num;
>  };
>  
> +static const struct mtk_wdt_data mt2712_data = {
> +	.toprgu_sw_rst_num = MT2712_TOPRGU_SW_RST_NUM,
> +};
> +
>  static const struct mtk_wdt_data mt8183_data = {
>  	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
>  };
> @@ -314,6 +319,7 @@ static int mtk_wdt_resume(struct device *dev)
>  #endif
>  
>  static const struct of_device_id mtk_wdt_dt_ids[] = {
> +	{ .compatible = "mediatek,mt2712-wdt", .data = &mt2712_data },
>  	{ .compatible = "mediatek,mt6589-wdt" },
>  	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
>  	{ /* sentinel */ }
> 

^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: Add reset controller
  2020-01-15 16:18   ` Matthias Brugger
@ 2020-01-19  3:21     ` Yong Liang
  0 siblings, 0 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-19  3:21 UTC (permalink / raw)
  To: Matthias Brugger
  Cc: wim, linux, p.zabel, linux-watchdog, linux-kernel,
	linux-arm-kernel, linux-mediatek, devicetree,
	Chang-An Chen (陳昶安),
	Freddy Hsin (辛恒豐),
	Jiaxin Yu (俞家鑫),
	sboyd, Yingjoe Chen (陳英洲)

On Thu, 2020-01-16 at 00:18 +0800, Matthias Brugger wrote:
> 
> On 15/01/2020 09:58, Yong Liang wrote:
> > From: "yong.liang" <yong.liang@mediatek.com>
> > 
> > Add reset controller for 2712.
> > Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
> > camera, codec and connectivity) software reset functionality.
> > 
> > Signed-off-by: yong.liang <yong.liang@mediatek.com>
> > Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> > Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
> > Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
> 
> Acked-by: Matthias Brugger <matthias.bgg@gmail.com>

Hi Mattias:
  May I need send a new patch whith this tag?
> 
> > ---
> >  drivers/watchdog/mtk_wdt.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> > index e88aacb0404d..d6a6393f609d 100644
> > --- a/drivers/watchdog/mtk_wdt.c
> > +++ b/drivers/watchdog/mtk_wdt.c
> > @@ -9,6 +9,7 @@
> >   * Based on sunxi_wdt.c
> >   */
> >  
> > +#include <dt-bindings/reset-controller/mt2712-resets.h>
> >  #include <dt-bindings/reset-controller/mt8183-resets.h>
> >  #include <linux/delay.h>
> >  #include <linux/err.h>
> > @@ -67,6 +68,10 @@ struct mtk_wdt_data {
> >  	int toprgu_sw_rst_num;
> >  };
> >  
> > +static const struct mtk_wdt_data mt2712_data = {
> > +	.toprgu_sw_rst_num = MT2712_TOPRGU_SW_RST_NUM,
> > +};
> > +
> >  static const struct mtk_wdt_data mt8183_data = {
> >  	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
> >  };
> > @@ -314,6 +319,7 @@ static int mtk_wdt_resume(struct device *dev)
> >  #endif
> >  
> >  static const struct of_device_id mtk_wdt_dt_ids[] = {
> > +	{ .compatible = "mediatek,mt2712-wdt", .data = &mt2712_data },
> >  	{ .compatible = "mediatek,mt6589-wdt" },
> >  	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
> >  	{ /* sentinel */ }
> > 
> 
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek


^ permalink raw reply	[flat|nested] 10+ messages in thread

* Re: [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller
  2020-01-15 16:18   ` Matthias Brugger
@ 2020-01-19  3:22     ` Yong Liang
  0 siblings, 0 replies; 10+ messages in thread
From: Yong Liang @ 2020-01-19  3:22 UTC (permalink / raw)
  To: Matthias Brugger
  Cc: wim, linux, p.zabel, linux-watchdog, linux-kernel,
	linux-arm-kernel, linux-mediatek, devicetree,
	Chang-An Chen (陳昶安),
	Freddy Hsin (辛恒豐),
	Jiaxin Yu (俞家鑫),
	Yingjoe Chen (陳英洲),
	sboyd

On Thu, 2020-01-16 at 00:18 +0800, Matthias Brugger wrote:
> 
> On 15/01/2020 09:58, Yong Liang wrote:
> > From: "yong.liang" <yong.liang@mediatek.com>
> > 
> > Add reset controller API in watchdog driver.
> > Besides watchdog, MTK toprgu module alsa provide sub-system (eg, audio,
> > camera, codec and connectivity) software reset functionality.
> > 
> > Signed-off-by: yong.liang <yong.liang@mediatek.com>
> > Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
> > Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
> > Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
> 
> Acked-by: Matthias Brugger <matthias.bgg@gmail.com>

  May I need send a new patch whith this tag?
> 
> > ---
> >  drivers/watchdog/mtk_wdt.c | 99 +++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 98 insertions(+), 1 deletion(-)
> > 
> > diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
> > index 9c3d0033260d..e88aacb0404d 100644
> > --- a/drivers/watchdog/mtk_wdt.c
> > +++ b/drivers/watchdog/mtk_wdt.c
> > @@ -9,6 +9,8 @@
> >   * Based on sunxi_wdt.c
> >   */
> >  
> > +#include <dt-bindings/reset-controller/mt8183-resets.h>
> > +#include <linux/delay.h>
> >  #include <linux/err.h>
> >  #include <linux/init.h>
> >  #include <linux/io.h>
> > @@ -16,10 +18,11 @@
> >  #include <linux/module.h>
> >  #include <linux/moduleparam.h>
> >  #include <linux/of.h>
> > +#include <linux/of_device.h>
> >  #include <linux/platform_device.h>
> > +#include <linux/reset-controller.h>
> >  #include <linux/types.h>
> >  #include <linux/watchdog.h>
> > -#include <linux/delay.h>
> >  
> >  #define WDT_MAX_TIMEOUT		31
> >  #define WDT_MIN_TIMEOUT		1
> > @@ -44,6 +47,9 @@
> >  #define WDT_SWRST		0x14
> >  #define WDT_SWRST_KEY		0x1209
> >  
> > +#define WDT_SWSYSRST		0x18U
> > +#define WDT_SWSYS_RST_KEY	0x88000000
> > +
> >  #define DRV_NAME		"mtk-wdt"
> >  #define DRV_VERSION		"1.0"
> >  
> > @@ -53,8 +59,90 @@ static unsigned int timeout;
> >  struct mtk_wdt_dev {
> >  	struct watchdog_device wdt_dev;
> >  	void __iomem *wdt_base;
> > +	spinlock_t lock; /* protects WDT_SWSYSRST reg */
> > +	struct reset_controller_dev rcdev;
> > +};
> > +
> > +struct mtk_wdt_data {
> > +	int toprgu_sw_rst_num;
> >  };
> >  
> > +static const struct mtk_wdt_data mt8183_data = {
> > +	.toprgu_sw_rst_num = MT8183_TOPRGU_SW_RST_NUM,
> > +};
> > +
> > +static int toprgu_reset_update(struct reset_controller_dev *rcdev,
> > +			       unsigned long id, bool assert)
> > +{
> > +	unsigned int tmp;
> > +	unsigned long flags;
> > +	struct mtk_wdt_dev *data =
> > +		 container_of(rcdev, struct mtk_wdt_dev, rcdev);
> > +
> > +	spin_lock_irqsave(&data->lock, flags);
> > +
> > +	tmp = readl(data->wdt_base + WDT_SWSYSRST);
> > +	if (assert)
> > +		tmp |= BIT(id);
> > +	else
> > +		tmp &= ~BIT(id);
> > +	tmp |= WDT_SWSYS_RST_KEY;
> > +	writel(tmp, data->wdt_base + WDT_SWSYSRST);
> > +
> > +	spin_unlock_irqrestore(&data->lock, flags);
> > +
> > +	return 0;
> > +}
> > +
> > +static int toprgu_reset_assert(struct reset_controller_dev *rcdev,
> > +			       unsigned long id)
> > +{
> > +	return toprgu_reset_update(rcdev, id, true);
> > +}
> > +
> > +static int toprgu_reset_deassert(struct reset_controller_dev *rcdev,
> > +				 unsigned long id)
> > +{
> > +	return toprgu_reset_update(rcdev, id, false);
> > +}
> > +
> > +static int toprgu_reset(struct reset_controller_dev *rcdev,
> > +			unsigned long id)
> > +{
> > +	int ret;
> > +
> > +	ret = toprgu_reset_assert(rcdev, id);
> > +	if (ret)
> > +		return ret;
> > +
> > +	return toprgu_reset_deassert(rcdev, id);
> > +}
> > +
> > +static const struct reset_control_ops toprgu_reset_ops = {
> > +	.assert = toprgu_reset_assert,
> > +	.deassert = toprgu_reset_deassert,
> > +	.reset = toprgu_reset,
> > +};
> > +
> > +static int toprgu_register_reset_controller(struct platform_device *pdev,
> > +					    int rst_num)
> > +{
> > +	int ret;
> > +	struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
> > +
> > +	spin_lock_init(&mtk_wdt->lock);
> > +
> > +	mtk_wdt->rcdev.owner = THIS_MODULE;
> > +	mtk_wdt->rcdev.nr_resets = rst_num;
> > +	mtk_wdt->rcdev.ops = &toprgu_reset_ops;
> > +	mtk_wdt->rcdev.of_node = pdev->dev.of_node;
> > +	ret = devm_reset_controller_register(&pdev->dev, &mtk_wdt->rcdev);
> > +	if (ret != 0)
> > +		dev_err(&pdev->dev,
> > +			"couldn't register wdt reset controller: %d\n", ret);
> > +	return ret;
> > +}
> > +
> >  static int mtk_wdt_restart(struct watchdog_device *wdt_dev,
> >  			   unsigned long action, void *data)
> >  {
> > @@ -155,6 +243,7 @@ static int mtk_wdt_probe(struct platform_device *pdev)
> >  {
> >  	struct device *dev = &pdev->dev;
> >  	struct mtk_wdt_dev *mtk_wdt;
> > +	const struct mtk_wdt_data *wdt_data;
> >  	int err;
> >  
> >  	mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL);
> > @@ -190,6 +279,13 @@ static int mtk_wdt_probe(struct platform_device *pdev)
> >  	dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
> >  		 mtk_wdt->wdt_dev.timeout, nowayout);
> >  
> > +	wdt_data = of_device_get_match_data(dev);
> > +	if (wdt_data) {
> > +		err = toprgu_register_reset_controller(pdev,
> > +						       wdt_data->toprgu_sw_rst_num);
> > +		if (err)
> > +			return err;
> > +	}
> >  	return 0;
> >  }
> >  
> > @@ -219,6 +315,7 @@ static int mtk_wdt_resume(struct device *dev)
> >  
> >  static const struct of_device_id mtk_wdt_dt_ids[] = {
> >  	{ .compatible = "mediatek,mt6589-wdt" },
> > +	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
> >  	{ /* sentinel */ }
> >  };
> >  MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
> > 


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, back to index

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-15  8:58 [PATCH v12 0/4] ASoC: mt8183: fix audio playback slowly after playback Yong Liang
2020-01-15  8:58 ` [PATCH v12 1/4] dt-bindings: mediatek: mt8183: Add #reset-cells Yong Liang
2020-01-15  8:58 ` [PATCH v12 2/4] dt-bindings: mediatek: mt2712: " Yong Liang
2020-01-15  8:58 ` [PATCH v12 3/4] watchdog: mtk_wdt: mt8183: Add reset controller Yong Liang
2020-01-15 13:47   ` Guenter Roeck
2020-01-15 16:18   ` Matthias Brugger
2020-01-19  3:22     ` Yong Liang
2020-01-15  8:58 ` [PATCH v12 4/4] watchdog: mtk_wdt: mt2712: " Yong Liang
2020-01-15 16:18   ` Matthias Brugger
2020-01-19  3:21     ` Yong Liang

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