[U-Boot] [PATCH 4/7] ti: wdt: hwinit-common: Remove legacy watchdog disable code

[Lukasz Majewski]

This patch removes some legacy code inherited from omap4. It is redundant
to the code already available in ./drivers/watchdog/omap_wdt.c

The code dates back to 2010:
"ARMV7: Add basic support for TI OMAP4"
SHA1: d34efc767d26d353e0257042080eec7012e5440f

In contemporary u-boot omap watchdog:
- Can be enabled in SPL:
TI watchdog is initialized in spl_board_init() (call to hw_watchdog_init)

- Is explicitly disabled before making any changes of its registers

- Is re-enabled in init_func_watchdog_init() in ./common/board_f.c with
other architectures.

This patch removes silent watchdog disable on TI platform, which caused
lack of wdt protection in u-boot even when it was explicitly enabled (in
SPL) with CONFIG_HW_WATCHDOG.

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---
 arch/arm/mach-omap2/hwinit-common.c | 27 ---------------------------
 1 file changed, 27 deletions(-)

diff --git a/arch/arm/mach-omap2/hwinit-common.c b/arch/arm/mach-omap2/hwinit-common.c
index f317293..d6549d3 100644
--- a/arch/arm/mach-omap2/hwinit-common.c
+++ b/arch/arm/mach-omap2/hwinit-common.c
@@ -150,7 +150,6 @@ void early_system_init(void)
 	if (warm_reset())
 		force_emif_self_refresh();
 #endif
-	watchdog_init();
 	set_mux_conf_regs();
 #ifdef CONFIG_SPL_BUILD
 	srcomp_enable();
@@ -181,32 +180,6 @@ int arch_cpu_init_dm(void)
 }
 
 /*
- * Routine: wait_for_command_complete
- * Description: Wait for posting to finish on watchdog
- */
-void wait_for_command_complete(struct watchdog *wd_base)
-{
-	int pending = 1;
-	do {
-		pending = readl(&wd_base->wwps);
-	} while (pending);
-}
-
-/*
- * Routine: watchdog_init
- * Description: Shut down watch dogs
- */
-void watchdog_init(void)
-{
-	struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
-
-	writel(WD_UNLOCK1, &wd2_base->wspr);
-	wait_for_command_complete(wd2_base);
-	writel(WD_UNLOCK2, &wd2_base->wspr);
-}
-
-
-/*
  * This function finds the SDRAM size available in the system
  * based on DMM section configurations
  * This is needed because the size of memory installed may be
-- 
2.1.4