Merge commit 'a849088aa1' from rmk/fixes into cleanup/io-pci

As Stephen Rothwell reports, a849088aa155 ("ARM: Fix ioremap() of
address zero") from the arm-current tree and commit c2794437091a ("ARM:
Add fixed PCI i/o mapping") from the arm-soc tree conflict in
a nontrivial way in arch/arm/mm/mmu.c.

Rob Herring explains:
The PCI i/o reserved area has a dummy physical address of 0 and
needs to be skipped by ioremap searches. So we don't set
VM_ARM_STATIC_MAPPING to prevent matches by ioremap. The vm_struct
settings don't really matter when we do the real mapping of the
i/o space.

Since commit a849088aa155 is at the start of the fixes branch
in the arm tree, we can merge it into the branch that contains
the other ioremap changes.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 16 insertions, 2 deletions

diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c
index 4aacb66f7161..3a48c852be6c 100644
--- a/arch/arm/mach-exynos/pmu.c
+++ b/arch/arm/mach-exynos/pmu.c
@@ -315,7 +315,7 @@ static struct exynos_pmu_conf exynos5250_pmu_config[] = {
         { PMU_TABLE_END,},
 };
 
-void __iomem *exynos5_list_both_cnt_feed[] = {
+static void __iomem *exynos5_list_both_cnt_feed[] = {
         EXYNOS5_ARM_CORE0_OPTION,
         EXYNOS5_ARM_CORE1_OPTION,
         EXYNOS5_ARM_COMMON_OPTION,
@@ -329,7 +329,7 @@ void __iomem *exynos5_list_both_cnt_feed[] = {
         EXYNOS5_TOP_PWR_SYSMEM_OPTION,
 };
 
-void __iomem *exynos5_list_diable_wfi_wfe[] = {
+static void __iomem *exynos5_list_diable_wfi_wfe[] = {
         EXYNOS5_ARM_CORE1_OPTION,
         EXYNOS5_FSYS_ARM_OPTION,
         EXYNOS5_ISP_ARM_OPTION,
@@ -390,6 +390,8 @@ void exynos_sys_powerdown_conf(enum sys_powerdown mode)
 
 static int __init exynos_pmu_init(void)
 {
+        unsigned int value;
+
         exynos_pmu_config = exynos4210_pmu_config;
 
         if (soc_is_exynos4210()) {
@@ -399,6 +401,18 @@ static int __init exynos_pmu_init(void)
                 exynos_pmu_config = exynos4x12_pmu_config;
                 pr_info("EXYNOS4x12 PMU Initialize\n");
         } else if (soc_is_exynos5250()) {
+                /*
+                 * When SYS_WDTRESET is set, watchdog timer reset request
+                 * is ignored by power management unit.
+                 */
+                value = __raw_readl(EXYNOS5_AUTO_WDTRESET_DISABLE);
+                value &= ~EXYNOS5_SYS_WDTRESET;
+                __raw_writel(value, EXYNOS5_AUTO_WDTRESET_DISABLE);
+
+                value = __raw_readl(EXYNOS5_MASK_WDTRESET_REQUEST);
+                value &= ~EXYNOS5_SYS_WDTRESET;
+                __raw_writel(value, EXYNOS5_MASK_WDTRESET_REQUEST);
+
                 exynos_pmu_config = exynos5250_pmu_config;
                 pr_info("EXYNOS5250 PMU Initialize\n");
         } else {