[PATCH] ARM: OMAP4+: move errata initialization to omap4_pm_init_early

[Nishanth Menon <nm@ti.com>]

Move all OMAP4 PM errata initializations to centralized location in
omap4_pm_init_early. This allows for users to utilize the erratas
in various submodules as needed.

Reported-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
---
Reported by Tony here: https://patchwork.kernel.org/patch/3084521/
Reproduced with .config: http://slexy.org/view/s2EEdvTGXV on next-20140120 tag (based on omap2plus_defconfig)
Applies on v3.13 tag and on next-20140120
Tested to boot on next-20140120 along with https://patchwork.kernel.org/patch/3084521/
on PandaBoard-ES with multi_v7_defconfig: http://slexy.org/view/s27n0BWrPf

 arch/arm/mach-omap2/common.h   |    6 ++++++
 arch/arm/mach-omap2/io.c       |    1 +
 arch/arm/mach-omap2/omap-smp.c |    6 +-----
 arch/arm/mach-omap2/pm44xx.c   |   15 +++++++++++++++
 4 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index 3adaa1d..a6aae30 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -62,11 +62,17 @@ static inline int omap3_pm_init(void)
 
 #if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP4)
 int omap4_pm_init(void);
+int omap4_pm_init_early(void);
 #else
 static inline int omap4_pm_init(void)
 {
 	return 0;
 }
+
+static inline int omap4_pm_init_early(void)
+{
+	return 0;
+}
 #endif
 
 #ifdef CONFIG_OMAP_MUX
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 47381fd..d408b15 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -641,6 +641,7 @@ void __init omap4430_init_early(void)
 	omap_cm_base_init();
 	omap4xxx_check_revision();
 	omap4xxx_check_features();
+	omap4_pm_init_early();
 	omap44xx_prm_init();
 	omap44xx_voltagedomains_init();
 	omap44xx_powerdomains_init();
diff --git a/arch/arm/mach-omap2/omap-smp.c b/arch/arm/mach-omap2/omap-smp.c
index 75e95d4..17550aa 100644
--- a/arch/arm/mach-omap2/omap-smp.c
+++ b/arch/arm/mach-omap2/omap-smp.c
@@ -39,8 +39,6 @@
 
 #define OMAP5_CORE_COUNT	0x2
 
-u16 pm44xx_errata;
-
 /* SCU base address */
 static void __iomem *scu_base;
 
@@ -217,10 +215,8 @@ static void __init omap4_smp_prepare_cpus(unsigned int max_cpus)
 	if (scu_base)
 		scu_enable(scu_base);
 
-	if (cpu_is_omap446x()) {
+	if (cpu_is_omap446x())
 		startup_addr = omap4460_secondary_startup;
-		pm44xx_errata |= PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD;
-	}
 
 	/*
 	 * Write the address of secondary startup routine into the
diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c
index 82f06989..eefb30c 100644
--- a/arch/arm/mach-omap2/pm44xx.c
+++ b/arch/arm/mach-omap2/pm44xx.c
@@ -24,6 +24,8 @@
 #include "powerdomain.h"
 #include "pm.h"
 
+u16 pm44xx_errata;
+
 struct power_state {
 	struct powerdomain *pwrdm;
 	u32 next_state;
@@ -199,6 +201,19 @@ static inline int omap4_init_static_deps(void)
 }
 
 /**
+ * omap4_pm_init_early - Does early initialization necessary for OMAP4+ devices
+ *
+ * Initializes basic stuff for power management functionality.
+ */
+int __init omap4_pm_init_early(void)
+{
+	if (cpu_is_omap446x())
+		pm44xx_errata |= PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD;
+
+	return 0;
+}
+
+/**
  * omap4_pm_init - Init routine for OMAP4+ devices
  *
  * Initializes all powerdomain and clockdomain target states
-- 
1.7.9.5