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authorWenyou Yang <wenyou.yang@atmel.com>2015-08-06 18:16:46 +0800
committerWim Van Sebroeck <wim@iguana.be>2015-09-09 21:38:29 +0200
commit76534860f108b812926a4fbfbdadbfa9cdec89d0 (patch)
treec8eccc6ed7907af62386a4b280b179d698819763 /drivers/watchdog/Makefile
parentf8c33e9717150f7b8063d6d77a8ea90adad434e9 (diff)
downloadop-kernel-dev-76534860f108b812926a4fbfbdadbfa9cdec89d0.zip
op-kernel-dev-76534860f108b812926a4fbfbdadbfa9cdec89d0.tar.gz
watchdog: add a driver to support SAMA5D4 watchdog timer
From SAMA5D4, the watchdog timer is upgrated with a new feature, which is describled as in the datasheet, "WDT_MR can be written until a LOCKMR command is issued in WDT_CR". That is to say, as long as the bootstrap and u-boot don't issue a LOCKMR command, WDT_MR can be written more than once in the driver. So the SAMA5D4 watchdog driver's implementation is different from the at91sam9260 watchdog driver implemented in file at91sam9_wdt.c. The user application open the device file to enable the watchdog timer hardware, and close to disable it, and set the watchdog timer timeout by seting WDV and WDD fields of WDT_MR register, and ping the watchdog by issuing WDRSTT command to WDT_CR register with hard-coded key. Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/Makefile')
-rw-r--r--drivers/watchdog/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 1b0ef48..0c616e3 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
+obj-$(CONFIG_SAMA5D4_WATCHDOG) += sama5d4_wdt.o
obj-$(CONFIG_DW_WATCHDOG) += dw_wdt.o
obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
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