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Watchdog: DA9052/53 PMIC watchdog support v5

PATCH In review Ashish Jangam 2 participants 2 messages May 24, 2012

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Ashish Jangam

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PATCH 1/1 Watchdog: DA9052/53 PMIC watchdog support v5

This driver adds support for the watchdog functionality provided by the Dialog Semiconductor DA9052 PMIC chip.

Tested on samsung smdkv6410 and i.mx53 QS boards.

Signed-off-by Anthony Olech <[email protected]>
Signed-off-by Ashish Jangam <[email protected]>

---
Changes since V5:
- Supports reg and unref ops
- Remove unrequired locks as core takes of it
- Uses wdt->timeout
Changes since V4:
- Fix for the minimum time watchdog window TWDMIN
Changes since V3:
- Add new watchdog framework
Changes since V2:
- Code restructured for simplicty.
- Add watchdog documentation.
- Remove Auto strobing feature.
- Remove strobe filtering flag.

---
 Documentation/watchdog/watchdog-parameters.txt |    5 +
 drivers/watchdog/Kconfig                       |   12 +
 drivers/watchdog/Makefile                      |    1 +
 drivers/watchdog/da9052_wdt.c                  |  256 ++++++++++++++++++++++++
 4 files changed, 274 insertions(+), 0 deletions(-)
 create mode 100644 drivers/watchdog/da9052_wdt.c
Documentation/watchdog/watchdog-parameters.txt +5 -0
index 17ddd82..04fddbac 100644
@@ -78,6 +78,11 @@ wd0_timeout: Default watchdog0 timeout in 1/10secs
 wd1_timeout: Default watchdog1 timeout in 1/10secs
 wd2_timeout: Default watchdog2 timeout in 1/10secs
 -------------------------------------------------
+da9052wdt:
+timeout: Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s
+nowayout: Watchdog cannot be stopped once started
+	(default=kernel config parameter)
+-------------------------------------------------
 davinci_wdt:
 heartbeat: Watchdog heartbeat period in seconds from 1 to 600, default 60
 -------------------------------------------------
drivers/watchdog/Kconfig +12 -0
index d92d748..004e261 100644
@@ -64,6 +64,18 @@ config SOFT_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called softdog.
 
+config DA9052_WATCHDOG
+        tristate "Dialog DA9052 Watchdog"
+        depends on PMIC_DA9052
+        select WATCHDOG_CORE
+        help
+          Support for the watchdog in the DA9052 PMIC. Watchdog trigger
+          cause system reset.
+
+          Say Y here to include support for the DA9052 watchdog.
+          Alternatively say M to compile the driver as a module,
+          which will be called da9052_wdt.
+
 config WM831X_WATCHDOG
 	tristate "WM831x watchdog"
 	depends on MFD_WM831X
drivers/watchdog/Makefile +1 -0
index 442bfbe..67b9f68 100644
@@ -166,4 +166,5 @@ obj-$(CONFIG_XEN_WDT) += xen_wdt.o
 obj-$(CONFIG_WM831X_WATCHDOG) += wm831x_wdt.o
 obj-$(CONFIG_WM8350_WATCHDOG) += wm8350_wdt.o
 obj-$(CONFIG_MAX63XX_WATCHDOG) += max63xx_wdt.o
+obj-$(CONFIG_DA9052_WATCHDOG) += da9052_wdt.o
 obj-$(CONFIG_SOFT_WATCHDOG) += softdog.o
drivers/watchdog/da9052_wdt.c new file +256 -0

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