watchdog: orion_wdt: take timeout value in ms
The generic wdt_start API expects to be called with the timeout in
milliseconds. Update the orion_wdt driver to accept a timeout in
milliseconds and use the clock rate specified in the dts to convert the
timeout to an appropriate value for the timer reload register.
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c
index c1add3e..885821d 100644
--- a/drivers/watchdog/orion_wdt.c
+++ b/drivers/watchdog/orion_wdt.c
@@ -14,7 +14,9 @@
#include <common.h>
#include <dm.h>
+#include <clk.h>
#include <wdt.h>
+#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
@@ -27,6 +29,8 @@
void __iomem *rstout;
void __iomem *rstout_mask;
u32 timeout;
+ unsigned long clk_rate;
+ struct clk clk;
};
#define RSTOUT_ENABLE_BIT BIT(8)
@@ -44,17 +48,18 @@
struct orion_wdt_priv *priv = dev_get_priv(dev);
/* Reload watchdog duration */
- writel(priv->timeout, priv->reg + priv->wdt_counter_offset);
+ writel(priv->clk_rate * priv->timeout,
+ priv->reg + priv->wdt_counter_offset);
return 0;
}
-static int orion_wdt_start(struct udevice *dev, u64 timeout, ulong flags)
+static int orion_wdt_start(struct udevice *dev, u64 timeout_ms, ulong flags)
{
struct orion_wdt_priv *priv = dev_get_priv(dev);
u32 reg;
- priv->timeout = (u32) timeout;
+ priv->timeout = DIV_ROUND_UP(timeout_ms, 1000);
/* Enable the fixed watchdog clock input */
reg = readl(priv->reg + TIMER_CTRL);
@@ -62,7 +67,8 @@
writel(reg, priv->reg + TIMER_CTRL);
/* Set watchdog duration */
- writel(priv->timeout, priv->reg + priv->wdt_counter_offset);
+ writel(priv->clk_rate * priv->timeout,
+ priv->reg + priv->wdt_counter_offset);
/* Clear the watchdog expiration bit */
reg = readl(priv->reg + TIMER_A370_STATUS);
@@ -147,9 +153,18 @@
static int orion_wdt_probe(struct udevice *dev)
{
+ struct orion_wdt_priv *priv = dev_get_priv(dev);
+ int ret;
+
debug("%s: Probing wdt%u\n", __func__, dev->seq);
orion_wdt_stop(dev);
+ ret = clk_get_by_name(dev, "fixed", &priv->clk);
+ if (!ret)
+ priv->clk_rate = clk_get_rate(&priv->clk);
+ else
+ priv->clk_rate = 25000000;
+
return 0;
}