From 072de836f53be56a70cecf70b43ae43b7ce17376 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 10:08:36 +0000
Subject: [PATCH] mk-rootfs.sh
---
kernel/drivers/watchdog/mtk_wdt.c | 142 +++++++++++++++++++++++++++++++++++++---------
1 files changed, 113 insertions(+), 29 deletions(-)
diff --git a/kernel/drivers/watchdog/mtk_wdt.c b/kernel/drivers/watchdog/mtk_wdt.c
index 4baf64f..d6a6393 100644
--- a/kernel/drivers/watchdog/mtk_wdt.c
+++ b/kernel/drivers/watchdog/mtk_wdt.c
@@ -9,6 +9,9 @@
* 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>
#include <linux/init.h>
#include <linux/io.h>
@@ -16,10 +19,11 @@
#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 +48,9 @@
#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"
@@ -53,7 +60,93 @@
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 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,
+};
+
+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)
@@ -153,18 +246,18 @@
static int mtk_wdt_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct mtk_wdt_dev *mtk_wdt;
- struct resource *res;
+ const struct mtk_wdt_data *wdt_data;
int err;
- mtk_wdt = devm_kzalloc(&pdev->dev, sizeof(*mtk_wdt), GFP_KERNEL);
+ mtk_wdt = devm_kzalloc(dev, sizeof(*mtk_wdt), GFP_KERNEL);
if (!mtk_wdt)
return -ENOMEM;
platform_set_drvdata(pdev, mtk_wdt);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mtk_wdt->wdt_base = devm_ioremap_resource(&pdev->dev, res);
+ mtk_wdt->wdt_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(mtk_wdt->wdt_base))
return PTR_ERR(mtk_wdt->wdt_base);
@@ -173,9 +266,9 @@
mtk_wdt->wdt_dev.timeout = WDT_MAX_TIMEOUT;
mtk_wdt->wdt_dev.max_timeout = WDT_MAX_TIMEOUT;
mtk_wdt->wdt_dev.min_timeout = WDT_MIN_TIMEOUT;
- mtk_wdt->wdt_dev.parent = &pdev->dev;
+ mtk_wdt->wdt_dev.parent = dev;
- watchdog_init_timeout(&mtk_wdt->wdt_dev, timeout, &pdev->dev);
+ watchdog_init_timeout(&mtk_wdt->wdt_dev, timeout, dev);
watchdog_set_nowayout(&mtk_wdt->wdt_dev, nowayout);
watchdog_set_restart_priority(&mtk_wdt->wdt_dev, 128);
@@ -183,30 +276,21 @@
mtk_wdt_stop(&mtk_wdt->wdt_dev);
- err = watchdog_register_device(&mtk_wdt->wdt_dev);
+ watchdog_stop_on_reboot(&mtk_wdt->wdt_dev);
+ err = devm_watchdog_register_device(dev, &mtk_wdt->wdt_dev);
if (unlikely(err))
return err;
- dev_info(&pdev->dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
- mtk_wdt->wdt_dev.timeout, nowayout);
+ dev_info(dev, "Watchdog enabled (timeout=%d sec, nowayout=%d)\n",
+ mtk_wdt->wdt_dev.timeout, nowayout);
- return 0;
-}
-
-static void mtk_wdt_shutdown(struct platform_device *pdev)
-{
- struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
-
- if (watchdog_active(&mtk_wdt->wdt_dev))
- mtk_wdt_stop(&mtk_wdt->wdt_dev);
-}
-
-static int mtk_wdt_remove(struct platform_device *pdev)
-{
- struct mtk_wdt_dev *mtk_wdt = platform_get_drvdata(pdev);
-
- watchdog_unregister_device(&mtk_wdt->wdt_dev);
-
+ 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;
}
@@ -235,7 +319,9 @@
#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 */ }
};
MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);
@@ -247,8 +333,6 @@
static struct platform_driver mtk_wdt_driver = {
.probe = mtk_wdt_probe,
- .remove = mtk_wdt_remove,
- .shutdown = mtk_wdt_shutdown,
.driver = {
.name = DRV_NAME,
.pm = &mtk_wdt_pm_ops,
--
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