brcm47xx: update watchdog driver

This watchdog driver should work with SoC having a PMU.

This fixes #11720.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34323 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 131 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.6/551-ssb-add-methods-for-watchdog-driver.patch b/target/linux/brcm47xx/patches-3.6/551-ssb-add-methods-for-watchdog-driver.patch
new file mode 100644
index 000000000..46911d130
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.6/551-ssb-add-methods-for-watchdog-driver.patch
@@ -0,0 +1,131 @@
+--- a/drivers/ssb/driver_chipcommon.c
++++ b/drivers/ssb/driver_chipcommon.c
+@@ -4,6 +4,7 @@
+  *
+  * Copyright 2005, Broadcom Corporation
+  * Copyright 2006, 2007, Michael Buesch <m@bues.ch>
++ * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
+  *
+  * Licensed under the GNU/GPL. See COPYING for details.
+  */
+@@ -12,6 +13,7 @@
+ #include <linux/ssb/ssb_regs.h>
+ #include <linux/export.h>
+ #include <linux/pci.h>
++#include <linux/bcm47xx_wdt.h>
+ 
+ #include "ssb_private.h"
+ 
+@@ -306,6 +308,43 @@ static u32 ssb_chipco_watchdog_get_max_t
+ 		return (1 << nb) - 1;
+ }
+ 
++u32 ssb_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt, u32 ticks)
++{
++	struct ssb_chipcommon *cc = bcm47xx_wdt_get_drvdata(wdt);
++
++	if (cc->dev->bus->bustype != SSB_BUSTYPE_SSB)
++		return 0;
++
++	return ssb_chipco_watchdog_timer_set(cc, ticks);
++}
++
++u32 ssb_chipco_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms)
++{
++	struct ssb_chipcommon *cc = bcm47xx_wdt_get_drvdata(wdt);
++	u32 ticks;
++
++	if (cc->dev->bus->bustype != SSB_BUSTYPE_SSB)
++		return 0;
++
++	ticks = ssb_chipco_watchdog_timer_set(cc, cc->ticks_per_ms * ms);
++	return ticks / cc->ticks_per_ms;
++}
++
++static int ssb_chipco_watchdog_ticks_per_ms(struct ssb_chipcommon *cc)
++{
++	struct ssb_bus *bus = cc->dev->bus;
++
++	if (cc->capabilities & SSB_CHIPCO_CAP_PMU) {
++			/* based on 32KHz ILP clock */
++			return 32;
++	} else {
++		if (cc->dev->id.revision < 18)
++			return ssb_clockspeed(bus) / 1000;
++		else
++			return ssb_chipco_alp_clock(cc) / 1000;
++	}
++}
++
+ void ssb_chipcommon_init(struct ssb_chipcommon *cc)
+ {
+ 	if (!cc->dev)
+@@ -323,6 +362,11 @@ void ssb_chipcommon_init(struct ssb_chip
+ 	chipco_powercontrol_init(cc);
+ 	ssb_chipco_set_clockmode(cc, SSB_CLKMODE_FAST);
+ 	calc_fast_powerup_delay(cc);
++
++	if (cc->dev->bus->bustype == SSB_BUSTYPE_SSB) {
++		cc->ticks_per_ms = ssb_chipco_watchdog_ticks_per_ms(cc);
++		cc->max_timer_ms = ssb_chipco_watchdog_get_max_timer(cc) / cc->ticks_per_ms;
++	}
+ }
+ 
+ void ssb_chipco_suspend(struct ssb_chipcommon *cc)
+@@ -421,7 +465,7 @@ void ssb_chipco_timing_init(struct ssb_c
+ }
+ 
+ /* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
+-void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
++u32 ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
+ {
+ 	u32 maxt;
+ 	enum ssb_clkmode clkmode;
+@@ -441,6 +485,7 @@ void ssb_chipco_watchdog_timer_set(struc
+ 		/* instant NMI */
+ 		chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+ 	}
++	return ticks;
+ }
+ 
+ void ssb_chipco_irq_mask(struct ssb_chipcommon *cc, u32 mask, u32 value)
+--- a/drivers/ssb/ssb_private.h
++++ b/drivers/ssb/ssb_private.h
+@@ -3,6 +3,7 @@
+ 
+ #include <linux/ssb/ssb.h>
+ #include <linux/types.h>
++#include <linux/bcm47xx_wdt.h>
+ 
+ 
+ #define PFX	"ssb: "
+@@ -226,4 +227,8 @@ static inline int ssb_sflash_init(struct
+ 
+ extern struct platform_device ssb_pflash_dev;
+ 
++extern u32 ssb_chipco_watchdog_timer_set_wdt(struct bcm47xx_wdt *wdt,
++					     u32 ticks);
++extern u32 ssb_chipco_watchdog_timer_set_ms(struct bcm47xx_wdt *wdt, u32 ms);
++
+ #endif /* LINUX_SSB_PRIVATE_H_ */
+--- a/include/linux/ssb/ssb_driver_chipcommon.h
++++ b/include/linux/ssb/ssb_driver_chipcommon.h
+@@ -607,6 +607,8 @@ struct ssb_chipcommon {
+ #ifdef CONFIG_SSB_SFLASH
+ 	struct bcm47xx_sflash sflash;
+ #endif
++	u32 ticks_per_ms;
++	u32 max_timer_ms;
+ };
+ 
+ static inline bool ssb_chipco_available(struct ssb_chipcommon *cc)
+@@ -646,8 +648,7 @@ enum ssb_clkmode {
+ extern void ssb_chipco_set_clockmode(struct ssb_chipcommon *cc,
+ 				     enum ssb_clkmode mode);
+ 
+-extern void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc,
+-					  u32 ticks);
++extern u32 ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks);
+ 
+ void ssb_chipco_irq_mask(struct ssb_chipcommon *cc, u32 mask, u32 value);
+