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watchdog: davinci: reuse driver for keystone arch 

The keystone arch uses the same IP watchdog, so add "ti,keystone-wdt"
compatible and correct identity.

The Keystone arch is using clocks in DT and source clock for watchdog
has to be specified, so add this to binding.

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Ivan Khoronzhuk 2013-12-04 21:39:30 +02:00 committed by Wim Van Sebroeck
parent 4fa5daa9c6
commit 8832b20093
3 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/devicetree/bindings/watchdog/davinci-wdt.txt
View File

@ -1,11 +1,18 @@
DaVinci Watchdog Timer (WDT) Controller
Texas Instruments DaVinci/Keystone Watchdog Timer (WDT) Controller
Required properties:
- compatible : Should be "ti,davinci-wdt"
- compatible : Should be "ti,davinci-wdt", "ti,keystone-wdt"
- reg : Should contain WDT registers location and length
Optional properties:
- timeout-sec : Contains the watchdog timeout in seconds
- clocks : the clock feeding the watchdog timer.
Needed if platform uses clocks.
See clock-bindings.txt
Documentation:
Davinci DM646x - http://www.ti.com/lit/ug/spruer5b/spruer5b.pdf
Keystone - http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf
Examples:
@ -13,4 +20,5 @@ wdt: wdt@2320000 {
compatible = "ti,davinci-wdt";
reg = <0x02320000 0x80>;
timeout-sec = <30>;
clocks = <&clkwdtimer0>;
};

4
drivers/watchdog/Kconfig
View File

@ -270,11 +270,11 @@ config IOP_WATCHDOG
config DAVINCI_WATCHDOG
tristate "DaVinci watchdog"
depends on ARCH_DAVINCI
depends on ARCH_DAVINCI || ARCH_KEYSTONE
select WATCHDOG_CORE
help
Say Y here if to include support for the watchdog timer
in the DaVinci DM644x/DM646x processors.
in the DaVinci DM644x/DM646x or Keystone processors.
To compile this driver as a module, choose M here: the
module will be called davinci_wdt.

2
drivers/watchdog/davinci_wdt.c
View File

@ -143,7 +143,7 @@ static unsigned int davinci_wdt_get_timeleft(struct watchdog_device *wdd)
static const struct watchdog_info davinci_wdt_info = {
.options = WDIOF_KEEPALIVEPING,
.identity = "DaVinci Watchdog",
.identity = "DaVinci/Keystone Watchdog",
};
static const struct watchdog_ops davinci_wdt_ops = {