From 2b064bb398c9349a119eedfcd80a1fd6c034f42d Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Thu, 7 Apr 2011 20:53:10 +0000 Subject: [PATCH] ar71xx: add support for the watchdog of the AR934x SoCs Signed-off-by: Jaiganesh Narayanan SVN-Revision: 26516 --- .../files/drivers/watchdog/ar71xx_wdt.c | 22 +++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c b/target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c index abe157cb0d..7163465752 100644 --- a/target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c +++ b/target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c @@ -1,9 +1,12 @@ /* * Driver for the Atheros AR71xx SoC's built-in hardware watchdog timer. * + * Copyright (C) 2010-2011 Jaiganesh Narayanan * Copyright (C) 2008 Gabor Juhos * Copyright (C) 2008 Imre Kaloz * + * Parts of this file are based on Atheros 2.6.31 BSP + * * This driver was based on: drivers/watchdog/ixp4xx_wdt.c * Author: Deepak Saxena * Copyright 2004 (c) MontaVista, Software, Inc. @@ -28,6 +31,7 @@ #include #include #include +#include #include @@ -53,16 +57,18 @@ static unsigned long wdt_flags; static int wdt_timeout = WDT_TIMEOUT; static int boot_status; static int max_timeout; +static u32 wdt_clk_freq; static inline void ar71xx_wdt_keepalive(void) { - ar71xx_reset_wr(AR71XX_RESET_REG_WDOG, ar71xx_ahb_freq * wdt_timeout); + ar71xx_reset_wr(AR71XX_RESET_REG_WDOG, wdt_clk_freq * wdt_timeout); } static inline void ar71xx_wdt_enable(void) { printk(KERN_DEBUG DRV_NAME ": enabling watchdog timer\n"); ar71xx_wdt_keepalive(); + udelay(2); ar71xx_reset_wr(AR71XX_RESET_REG_WDOG_CTRL, WDOG_CTRL_ACTION_FCR); } @@ -212,7 +218,19 @@ static int __devinit ar71xx_wdt_probe(struct platform_device *pdev) { int ret; - max_timeout = (0xfffffffful / ar71xx_ahb_freq); + switch (ar71xx_soc) { + case AR71XX_SOC_AR9341: + case AR71XX_SOC_AR9342: + case AR71XX_SOC_AR9344: + wdt_clk_freq = ar934x_ref_freq; + break; + + default: + wdt_clk_freq = ar71xx_ahb_freq; + break; + } + + max_timeout = (0xfffffffful / wdt_clk_freq); wdt_timeout = (max_timeout < WDT_TIMEOUT) ? max_timeout : WDT_TIMEOUT; if (ar71xx_reset_rr(AR71XX_RESET_REG_WDOG_CTRL) & WDOG_CTRL_LAST_RESET)