Return the remaining time from the hardware control register.
Signed-off-by: Simon Arlott <simon@xxxxxxxxxxx>
---
On 25/11/15 02:51, Guenter Roeck wrote:
> This is really two logical changes, isn't it ?
Patch 7 split into two patches.
drivers/watchdog/bcm63xx_wdt.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/watchdog/bcm63xx_wdt.c b/drivers/watchdog/bcm63xx_wdt.c
index 0a19731..5615277 100644
--- a/drivers/watchdog/bcm63xx_wdt.c
+++ b/drivers/watchdog/bcm63xx_wdt.c
@@ -14,6 +14,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -78,6 +79,19 @@ static int bcm63xx_wdt_stop(struct watchdog_device *wdd)
return 0;
}
+static unsigned int bcm63xx_wdt_get_timeleft(struct watchdog_device *wdd)
+{
+ struct bcm63xx_wdt_hw *hw = to_wdt_hw(wdd);
+ unsigned long flags;
+ u32 val;
+
+ raw_spin_lock_irqsave(&hw->lock, flags);
+ val = __raw_readl(hw->regs + WDT_CTL_REG);
+ val /= hw->clock_hz;
+ raw_spin_unlock_irqrestore(&hw->lock, flags);
+ return val;
+}
+
static int bcm63xx_wdt_set_timeout(struct watchdog_device *wdd,
unsigned int timeout)
{
@@ -132,6 +146,7 @@ static struct watchdog_ops bcm63xx_wdt_ops = {
.owner = THIS_MODULE,
.start = bcm63xx_wdt_start,
.stop = bcm63xx_wdt_stop,
+ .get_timeleft = bcm63xx_wdt_get_timeleft,
.set_timeout = bcm63xx_wdt_set_timeout,
};
@@ -215,7 +230,6 @@ static int bcm63xx_wdt_probe(struct platform_device *pdev)
"%s at MMIO 0x%p (timeout = %us, max_timeout = %us)",
dev_name(wdd->dev), hw->regs,
wdd->timeout, wdd->max_timeout);
-
return 0;
unregister_watchdog:
@@ -256,6 +270,7 @@ module_platform_driver(bcm63xx_wdt_driver);
MODULE_AUTHOR("Miguel Gaio <miguel.gaio@xxxxxxxxx>");
MODULE_AUTHOR("Florian Fainelli <florian@xxxxxxxxxxx>");
+MODULE_AUTHOR("Simon Arlott");
MODULE_DESCRIPTION("Driver for the Broadcom BCM63xx SoC watchdog");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:bcm63xx-wdt");
--
2.1.4
--
Simon Arlott
--
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