* [PATCH] watchdog: imx2_wdt: set watchdog parent device
@ 2015-06-02 12:46 Vladimir Zapolskiy
2015-06-02 13:46 ` Guenter Roeck
0 siblings, 1 reply; 2+ messages in thread
From: Vladimir Zapolskiy @ 2015-06-02 12:46 UTC (permalink / raw)
To: Wim Van Sebroeck; +Cc: linux-watchdog
If on watchdog device registration a parent device is not set, then
the registered watchdog is considered to be a virtual device:
/sys/devices/virtual/watchdog/watchdog0
/sys/devices/virtual/watchdog/watchdog1
Setting a correct reference to a platform device allows to
distinguish multiple instances of iMX2+ hardware watchdogs:
/sys/devices/soc0/soc/2000000.aips-bus/20bc000.wdog/watchdog/watchdog0
/sys/devices/soc0/soc/2000000.aips-bus/20c0000.wdog/watchdog/watchdog1
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
---
drivers/watchdog/imx2_wdt.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 5e6d808..3450a46 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -256,6 +256,7 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
wdog->ops = &imx2_wdt_ops;
wdog->min_timeout = 1;
wdog->max_timeout = IMX2_WDT_MAX_TIME;
+ wdog->parent = &pdev->dev;
clk_prepare_enable(wdev->clk);
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] watchdog: imx2_wdt: set watchdog parent device
2015-06-02 12:46 [PATCH] watchdog: imx2_wdt: set watchdog parent device Vladimir Zapolskiy
@ 2015-06-02 13:46 ` Guenter Roeck
0 siblings, 0 replies; 2+ messages in thread
From: Guenter Roeck @ 2015-06-02 13:46 UTC (permalink / raw)
To: Vladimir Zapolskiy, Wim Van Sebroeck; +Cc: linux-watchdog
On 06/02/2015 05:46 AM, Vladimir Zapolskiy wrote:
> If on watchdog device registration a parent device is not set, then
> the registered watchdog is considered to be a virtual device:
>
> /sys/devices/virtual/watchdog/watchdog0
> /sys/devices/virtual/watchdog/watchdog1
>
> Setting a correct reference to a platform device allows to
> distinguish multiple instances of iMX2+ hardware watchdogs:
>
> /sys/devices/soc0/soc/2000000.aips-bus/20bc000.wdog/watchdog/watchdog0
> /sys/devices/soc0/soc/2000000.aips-bus/20c0000.wdog/watchdog/watchdog1
>
> Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
^ permalink raw reply [flat|nested] 2+ messages in thread
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