[PATCH 08/28] ARM: at91: watchdog: implement at91_wdt_disable

[Ahmad Fatoum]

Board code might want to disable the watchdog in PBL and enable it later
prior to boot. Provide a helper to do so.

Reviewed-by: Sam Ravnborg <sam at ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 arch/arm/mach-at91/include/mach/at91_wdt.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/mach-at91/include/mach/at91_wdt.h b/arch/arm/mach-at91/include/mach/at91_wdt.h
index 36d37b9d2d64..d295d35d1b5c 100644
--- a/arch/arm/mach-at91/include/mach/at91_wdt.h
+++ b/arch/arm/mach-at91/include/mach/at91_wdt.h
@@ -35,4 +35,20 @@
 #define		AT91_WDT_WDUNF		(1 << 0)		/* Watchdog Underflow */
 #define		AT91_WDT_WDERR		(1 << 1)		/* Watchdog Error */
 
+#ifndef __ASSEMBLY__
+// SPDX-License-Identifier: BSD-1-Clause
+/*
+ * Copyright (c) 2006, Atmel Corporation
+ */
+
+#include <asm-generic/io.h>
+
+static inline void at91_wdt_disable(void __iomem *wdt_base)
+{
+	u32 reg = readl(wdt_base + AT91_WDT_MR);
+	reg |= AT91_WDT_WDDIS;
+	writel(reg, wdt_base + AT91_WDT_MR);
+}
+
+#endif /* __ASSEMBLY__ */
 #endif
-- 
2.27.0