diff options
| author | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-04-07 20:53:10 +0000 |
|---|---|---|
| committer | juhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2011-04-07 20:53:10 +0000 |
| commit | 7072aeaf32e086659bd58d671c0b269c7fb582d0 (patch) | |
| tree | 3e2f9ac8a01b7d9cccf37ec6f7a7616683be3c82 /target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c | |
| parent | b21a1fabc6749b71438c90995272f25f0fafd8bf (diff) | |
ar71xx: add support for the watchdog of the AR934x SoCs
Signed-off-by: Jaiganesh Narayanan <jnarayanan@atheros.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26516 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/watchdog/ar71xx_wdt.c | 22 |
1 files 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 <jnarayanan@atheros.com> * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org> * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> * + * 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 <dsaxena@plexity.net> * Copyright 2004 (c) MontaVista, Software, Inc. @@ -28,6 +31,7 @@ #include <linux/platform_device.h> #include <linux/types.h> #include <linux/watchdog.h> +#include <linux/delay.h> #include <asm/mach-ar71xx/ar71xx.h> @@ -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) |