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bmips: backport accepted watchdog patch

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This patch has been accepted for linux v5.14.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
This commit is contained in:
Álvaro Fernández Rojas
2021-08-25 10:24:33 +02:00
parent 38cb500516
commit 4ab0b5fabd
2 changed files with 86 additions and 66 deletions
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86
target/linux/bmips/patches-5.10/080-v5.14-watchdog-bcm7038_wdt-add-big-endian-support.patch Normal file
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@@ -0,0 +1,86 @@
From e379c2199de4280243e43118dceb4ea5e97059a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
Date: Tue, 23 Feb 2021 09:00:42 +0100
Subject: [PATCH] watchdog: bcm7038_wdt: add big endian support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
bcm7038_wdt can be used on bmips big endian (bcm63xx) devices too.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210223080042.29569-1-noltari@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
---
drivers/watchdog/bcm7038_wdt.c | 31 +++++++++++++++++++++++++------
1 file changed, 25 insertions(+), 6 deletions(-)
--- a/drivers/watchdog/bcm7038_wdt.c
+++ b/drivers/watchdog/bcm7038_wdt.c
@@ -34,6 +34,25 @@ struct bcm7038_watchdog {
static bool nowayout = WATCHDOG_NOWAYOUT;
+static inline void bcm7038_wdt_write(u32 value, void __iomem *addr)
+{
+ /* MIPS chips strapped for BE will automagically configure the
+ * peripheral registers for CPU-native byte order.
+ */
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ __raw_writel(value, addr);
+ else
+ writel_relaxed(value, addr);
+}
+
+static inline u32 bcm7038_wdt_read(void __iomem *addr)
+{
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
+ return __raw_readl(addr);
+ else
+ return readl_relaxed(addr);
+}
+
static void bcm7038_wdt_set_timeout_reg(struct watchdog_device *wdog)
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
@@ -41,15 +60,15 @@ static void bcm7038_wdt_set_timeout_reg(
timeout = wdt->rate * wdog->timeout;
- writel(timeout, wdt->base + WDT_TIMEOUT_REG);
+ bcm7038_wdt_write(timeout, wdt->base + WDT_TIMEOUT_REG);
}
static int bcm7038_wdt_ping(struct watchdog_device *wdog)
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
- writel(WDT_START_1, wdt->base + WDT_CMD_REG);
- writel(WDT_START_2, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_START_1, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_START_2, wdt->base + WDT_CMD_REG);
return 0;
}
@@ -66,8 +85,8 @@ static int bcm7038_wdt_stop(struct watch
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
- writel(WDT_STOP_1, wdt->base + WDT_CMD_REG);
- writel(WDT_STOP_2, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_STOP_1, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_STOP_2, wdt->base + WDT_CMD_REG);
return 0;
}
@@ -88,7 +107,7 @@ static unsigned int bcm7038_wdt_get_time
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
u32 time_left;
- time_left = readl(wdt->base + WDT_CMD_REG);
+ time_left = bcm7038_wdt_read(wdt->base + WDT_CMD_REG);
return time_left / wdt->rate;
}

66
target/linux/bmips/patches-5.10/120-wdt-bcm7038-add-big-endian-compatibility.patch
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@@ -1,66 +0,0 @@
--- a/drivers/watchdog/bcm7038_wdt.c
+++ b/drivers/watchdog/bcm7038_wdt.c
@@ -34,6 +34,24 @@ struct bcm7038_watchdog {
static bool nowayout = WATCHDOG_NOWAYOUT;
+static inline void bcm7038_wdt_write(unsigned long data, void __iomem *reg)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ iowrite32be(data, reg);
+#else
+ writel(data, reg);
+#endif
+}
+
+static inline unsigned long bcm7038_wdt_read(void __iomem *reg)
+{
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ return ioread32be(reg);
+#else
+ return readl(reg);
+#endif
+}
+
static void bcm7038_wdt_set_timeout_reg(struct watchdog_device *wdog)
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
@@ -41,15 +59,15 @@ static void bcm7038_wdt_set_timeout_reg(
timeout = wdt->rate * wdog->timeout;
- writel(timeout, wdt->base + WDT_TIMEOUT_REG);
+ bcm7038_wdt_write(timeout, wdt->base + WDT_TIMEOUT_REG);
}
static int bcm7038_wdt_ping(struct watchdog_device *wdog)
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
- writel(WDT_START_1, wdt->base + WDT_CMD_REG);
- writel(WDT_START_2, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_START_1, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_START_2, wdt->base + WDT_CMD_REG);
return 0;
}
@@ -66,8 +84,8 @@ static int bcm7038_wdt_stop(struct watch
{
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
- writel(WDT_STOP_1, wdt->base + WDT_CMD_REG);
- writel(WDT_STOP_2, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_STOP_1, wdt->base + WDT_CMD_REG);
+ bcm7038_wdt_write(WDT_STOP_2, wdt->base + WDT_CMD_REG);
return 0;
}
@@ -88,7 +106,7 @@ static unsigned int bcm7038_wdt_get_time
struct bcm7038_watchdog *wdt = watchdog_get_drvdata(wdog);
u32 time_left;
- time_left = readl(wdt->base + WDT_CMD_REG);
+ time_left = bcm7038_wdt_read(wdt->base + WDT_CMD_REG);
return time_left / wdt->rate;
}