aboutsummaryrefslogtreecommitdiff
path: root/drivers/watchdog
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/asm9260_wdt.c8
-rw-r--r--drivers/watchdog/aspeed_wdt.c13
-rw-r--r--drivers/watchdog/davinci_wdt.c15
-rw-r--r--drivers/watchdog/dw_wdt.c23
-rw-r--r--drivers/watchdog/f71808e_wdt.c3
-rw-r--r--drivers/watchdog/sbsa_gwdt.c3
6 files changed, 44 insertions, 21 deletions
diff --git a/drivers/watchdog/asm9260_wdt.c b/drivers/watchdog/asm9260_wdt.c
index 7dd0da644a7f..2cf56b459d84 100644
--- a/drivers/watchdog/asm9260_wdt.c
+++ b/drivers/watchdog/asm9260_wdt.c
@@ -292,14 +292,14 @@ static int asm9260_wdt_probe(struct platform_device *pdev)
if (IS_ERR(priv->iobase))
return PTR_ERR(priv->iobase);
- ret = asm9260_wdt_get_dt_clks(priv);
- if (ret)
- return ret;
-
priv->rst = devm_reset_control_get_exclusive(&pdev->dev, "wdt_rst");
if (IS_ERR(priv->rst))
return PTR_ERR(priv->rst);
+ ret = asm9260_wdt_get_dt_clks(priv);
+ if (ret)
+ return ret;
+
wdd = &priv->wdd;
wdd->info = &asm9260_wdt_ident;
wdd->ops = &asm9260_wdt_ops;
diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c
index 79cc766cd30f..fd91007b4e41 100644
--- a/drivers/watchdog/aspeed_wdt.c
+++ b/drivers/watchdog/aspeed_wdt.c
@@ -46,6 +46,7 @@ MODULE_DEVICE_TABLE(of, aspeed_wdt_of_table);
#define WDT_RELOAD_VALUE 0x04
#define WDT_RESTART 0x08
#define WDT_CTRL 0x0C
+#define WDT_CTRL_BOOT_SECONDARY BIT(7)
#define WDT_CTRL_RESET_MODE_SOC (0x00 << 5)
#define WDT_CTRL_RESET_MODE_FULL_CHIP (0x01 << 5)
#define WDT_CTRL_RESET_MODE_ARM_CPU (0x10 << 5)
@@ -158,6 +159,7 @@ static int aspeed_wdt_restart(struct watchdog_device *wdd,
{
struct aspeed_wdt *wdt = to_aspeed_wdt(wdd);
+ wdt->ctrl &= ~WDT_CTRL_BOOT_SECONDARY;
aspeed_wdt_enable(wdt, 128 * WDT_RATE_1MHZ / 1000);
mdelay(1000);
@@ -232,16 +234,21 @@ static int aspeed_wdt_probe(struct platform_device *pdev)
wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC | WDT_CTRL_RESET_SYSTEM;
} else {
if (!strcmp(reset_type, "cpu"))
- wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU;
+ wdt->ctrl |= WDT_CTRL_RESET_MODE_ARM_CPU |
+ WDT_CTRL_RESET_SYSTEM;
else if (!strcmp(reset_type, "soc"))
- wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC;
+ wdt->ctrl |= WDT_CTRL_RESET_MODE_SOC |
+ WDT_CTRL_RESET_SYSTEM;
else if (!strcmp(reset_type, "system"))
- wdt->ctrl |= WDT_CTRL_RESET_SYSTEM;
+ wdt->ctrl |= WDT_CTRL_RESET_MODE_FULL_CHIP |
+ WDT_CTRL_RESET_SYSTEM;
else if (strcmp(reset_type, "none"))
return -EINVAL;
}
if (of_property_read_bool(np, "aspeed,external-signal"))
wdt->ctrl |= WDT_CTRL_WDT_EXT;
+ if (of_property_read_bool(np, "aspeed,alt-boot"))
+ wdt->ctrl |= WDT_CTRL_BOOT_SECONDARY;
writel(wdt->ctrl, wdt->base + WDT_CTRL);
diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
index 2f46487af86d..6d9a5d8c3c8d 100644
--- a/drivers/watchdog/davinci_wdt.c
+++ b/drivers/watchdog/davinci_wdt.c
@@ -198,15 +198,22 @@ static int davinci_wdt_probe(struct platform_device *pdev)
wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
davinci_wdt->base = devm_ioremap_resource(dev, wdt_mem);
- if (IS_ERR(davinci_wdt->base))
- return PTR_ERR(davinci_wdt->base);
+ if (IS_ERR(davinci_wdt->base)) {
+ ret = PTR_ERR(davinci_wdt->base);
+ goto err_clk_disable;
+ }
ret = watchdog_register_device(wdd);
- if (ret < 0) {
- clk_disable_unprepare(davinci_wdt->clk);
+ if (ret) {
dev_err(dev, "cannot register watchdog device\n");
+ goto err_clk_disable;
}
+ return 0;
+
+err_clk_disable:
+ clk_disable_unprepare(davinci_wdt->clk);
+
return ret;
}
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
index c2f4ff516230..918357bccf5e 100644
--- a/drivers/watchdog/dw_wdt.c
+++ b/drivers/watchdog/dw_wdt.c
@@ -34,6 +34,7 @@
#define WDOG_CONTROL_REG_OFFSET 0x00
#define WDOG_CONTROL_REG_WDT_EN_MASK 0x01
+#define WDOG_CONTROL_REG_RESP_MODE_MASK 0x02
#define WDOG_TIMEOUT_RANGE_REG_OFFSET 0x04
#define WDOG_TIMEOUT_RANGE_TOPINIT_SHIFT 4
#define WDOG_CURRENT_COUNT_REG_OFFSET 0x08
@@ -121,14 +122,23 @@ static int dw_wdt_set_timeout(struct watchdog_device *wdd, unsigned int top_s)
return 0;
}
+static void dw_wdt_arm_system_reset(struct dw_wdt *dw_wdt)
+{
+ u32 val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET);
+
+ /* Disable interrupt mode; always perform system reset. */
+ val &= ~WDOG_CONTROL_REG_RESP_MODE_MASK;
+ /* Enable watchdog. */
+ val |= WDOG_CONTROL_REG_WDT_EN_MASK;
+ writel(val, dw_wdt->regs + WDOG_CONTROL_REG_OFFSET);
+}
+
static int dw_wdt_start(struct watchdog_device *wdd)
{
struct dw_wdt *dw_wdt = to_dw_wdt(wdd);
dw_wdt_set_timeout(wdd, wdd->timeout);
-
- writel(WDOG_CONTROL_REG_WDT_EN_MASK,
- dw_wdt->regs + WDOG_CONTROL_REG_OFFSET);
+ dw_wdt_arm_system_reset(dw_wdt);
return 0;
}
@@ -152,16 +162,13 @@ static int dw_wdt_restart(struct watchdog_device *wdd,
unsigned long action, void *data)
{
struct dw_wdt *dw_wdt = to_dw_wdt(wdd);
- u32 val;
writel(0, dw_wdt->regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
- val = readl(dw_wdt->regs + WDOG_CONTROL_REG_OFFSET);
- if (val & WDOG_CONTROL_REG_WDT_EN_MASK)
+ if (dw_wdt_is_enabled(dw_wdt))
writel(WDOG_COUNTER_RESTART_KICK_VALUE,
dw_wdt->regs + WDOG_COUNTER_RESTART_REG_OFFSET);
else
- writel(WDOG_CONTROL_REG_WDT_EN_MASK,
- dw_wdt->regs + WDOG_CONTROL_REG_OFFSET);
+ dw_wdt_arm_system_reset(dw_wdt);
/* wait for reset to assert... */
mdelay(500);
diff --git a/drivers/watchdog/f71808e_wdt.c b/drivers/watchdog/f71808e_wdt.c
index e682bf046e50..88cd2a52d8d3 100644
--- a/drivers/watchdog/f71808e_wdt.c
+++ b/drivers/watchdog/f71808e_wdt.c
@@ -566,7 +566,8 @@ static ssize_t watchdog_write(struct file *file, const char __user *buf,
char c;
if (get_user(c, buf + i))
return -EFAULT;
- expect_close = (c == 'V');
+ if (c == 'V')
+ expect_close = true;
}
/* Properly order writes across fork()ed processes */
diff --git a/drivers/watchdog/sbsa_gwdt.c b/drivers/watchdog/sbsa_gwdt.c
index 316c2eb122d2..e8bd9887c566 100644
--- a/drivers/watchdog/sbsa_gwdt.c
+++ b/drivers/watchdog/sbsa_gwdt.c
@@ -50,6 +50,7 @@
*/
#include <linux/io.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -159,7 +160,7 @@ static unsigned int sbsa_gwdt_get_timeleft(struct watchdog_device *wdd)
!(readl(gwdt->control_base + SBSA_GWDT_WCS) & SBSA_GWDT_WCS_WS0))
timeleft += readl(gwdt->control_base + SBSA_GWDT_WOR);
- timeleft += readq(gwdt->control_base + SBSA_GWDT_WCV) -
+ timeleft += lo_hi_readq(gwdt->control_base + SBSA_GWDT_WCV) -
arch_counter_get_cntvct();
do_div(timeleft, gwdt->clk);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-19 09:11:27 +0000