watchdog: MIPS: lantiq: implement OF support and minor fixes

Add support for OF. We also apply the following small fixes
* reduce boiler plate by using devm_request_and_ioremap
* sane error path for the clock
* move LTQ_RST_CAUSE_WDTRST to a soc specific header file
* add a message to show that the driver loaded

Signed-off-by: John Crispin <blogic@openwrt.org>
Acked-by: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-watchdog@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3810/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
index b5a2acf9156f..d0d40a42327c 100644
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -133,6 +133,8 @@ extern __iomem void *ltq_cgu_membase;
 #define LTQ_WDT_BASE_ADDR       0x1F8803F0
 #define LTQ_WDT_SIZE            0x10
 
+#define LTQ_RST_CAUSE_WDTRST    0x20
+
 /* STP - serial to parallel conversion unit */
 #define LTQ_STP_BASE_ADDR       0x1E100BB0
 #define LTQ_STP_SIZE            0x40