IKXCLOCK-1044 arm: omap2: enable OMAP offmode

Move off mode API to prm driver

Change-Id: I9b40bd0fc397f618aad0916fe15293516eb93711
Signed-off-by: Vladimir Tsunaev <vladimirt@motorola.com>

5 files changed, 33 insertions, 38 deletions

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 9b9c99c9f34..281a0a7614a 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -420,6 +420,15 @@ config OMAP3_SDRC_AC_TIMING
 	  wish to say no.  Selecting yes without understanding what is
 	  going on could result in system crashes;
 
+config DISABLE_OMAP_ERRATA_i583
+	bool "Override errata i583
+	depends on ARCH_OMAP3
+	default n
+	help
+	  Errata i583 affects JDEC memory timing when waking from OFF mode on
+	  ES 1.1 and older OMAP3.  If the system clock is 26MHz or 38.4MHz and
+	  there is no DDR on CS1, then it is safe to disable this errata check.
+
 config OMAP4_ERRATA_I688
 	bool "OMAP4 errata: Async Bridge Corruption"
 	depends on (ARCH_OMAP4 || SOC_OMAP5) && !ARCH_MULTIPLATFORM
diff --git a/arch/arm/mach-omap2/omap-pm-noop.c b/arch/arm/mach-omap2/omap-pm-noop.c
index 6a3be2bebdd..aeb217bfab1 100644
--- a/arch/arm/mach-omap2/omap-pm-noop.c
+++ b/arch/arm/mach-omap2/omap-pm-noop.c
@@ -25,7 +25,6 @@
 #include "omap_device.h"
 #include "omap-pm.h"
 
-static bool off_mode_enabled;
 static int dummy_context_loss_counter;
 
 /*
@@ -281,28 +280,6 @@ unsigned long omap_pm_cpu_get_freq(void)
 	return 0;
 }
 
-/**
- * omap_pm_enable_off_mode - notify OMAP PM that off-mode is enabled
- *
- * Intended for use only by OMAP PM core code to notify this layer
- * that off mode has been enabled.
- */
-void omap_pm_enable_off_mode(void)
-{
-	off_mode_enabled = true;
-}
-
-/**
- * omap_pm_disable_off_mode - notify OMAP PM that off-mode is disabled
- *
- * Intended for use only by OMAP PM core code to notify this layer
- * that off mode has been disabled.
- */
-void omap_pm_disable_off_mode(void)
-{
-	off_mode_enabled = false;
-}
-
 /*
  * Device context loss tracking
  */
@@ -320,12 +297,14 @@ int omap_pm_get_dev_context_loss_count(struct device *dev)
 	if (dev->pm_domain == &omap_device_pm_domain) {
 		count = omap_device_get_context_loss_count(pdev);
 	} else {
-		WARN_ONCE(off_mode_enabled, "omap_pm: using dummy context loss counter; device %s should be converted to omap_device",
+		WARN_ONCE(omap_pm_get_off_mode(),
+			"omap_pm: using dummy context loss counter; device %s "
+			"should be converted to omap_device",
 			  dev_name(dev));
 
 		count = dummy_context_loss_counter;
 
-		if (off_mode_enabled) {
+		if (omap_pm_get_off_mode()) {
 			count++;
 			/*
 			 * Context loss count has to be a non-negative value.
diff --git a/arch/arm/mach-omap2/omap-pm.h b/arch/arm/mach-omap2/omap-pm.h
index 67faa7b8fe9..4511a53b8e3 100644
--- a/arch/arm/mach-omap2/omap-pm.h
+++ b/arch/arm/mach-omap2/omap-pm.h
@@ -18,6 +18,7 @@
 #include <linux/cpufreq.h>
 #include <linux/clk.h>
 #include <linux/opp.h>
+#include <linux/power/omap_prm.h>
 
 /*
  * agent_id values for use with omap_pm_set_min_bus_tput():
@@ -346,7 +347,4 @@ unsigned long omap_pm_cpu_get_freq(void);
  */
 int omap_pm_get_dev_context_loss_count(struct device *dev);
 
-void omap_pm_enable_off_mode(void);
-void omap_pm_disable_off_mode(void);
-
 #endif
diff --git a/arch/arm/mach-omap2/pm-debug.c b/arch/arm/mach-omap2/pm-debug.c
index cc38db9edf0..b5dff42606c 100644
--- a/arch/arm/mach-omap2/pm-debug.c
+++ b/arch/arm/mach-omap2/pm-debug.c
@@ -227,9 +227,7 @@ static int __init pwrdms_setup(struct powerdomain *pwrdm, void *dir)
 
 static int option_get(void *data, u64 *val)
 {
-	u32 *option = data;
-
-	*val = *option;
+	*val = omap_pm_get_off_mode();
 
 	return 0;
 }
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 23eb24308cc..844b10723a2 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -39,6 +39,7 @@
 
 #include "clockdomain.h"
 #include "powerdomain.h"
+#include "omap-pm.h"
 #include "soc.h"
 #include "common.h"
 #include "cm3xxx.h"
@@ -51,6 +52,7 @@
 #include "sram.h"
 #include "control.h"
 #include "pm-debug-regs.h"
+#include "iomap.h"
 
 /* pm34xx errata defined in pm.h */
 u16 pm34xx_errata;
@@ -293,7 +295,8 @@ void omap_sram_idle(void)
 
 	/* PER */
 	if (per_next_state < PWRDM_POWER_ON) {
-		per_going_off = (per_next_state == PWRDM_POWER_OFF) ? 1 : 0;
+		per_going_off = (per_next_state == PWRDM_POWER_OFF) ?
+			OFF_MODE : 0;
 		omap2_gpio_prepare_for_idle(per_going_off);
 	}
 
@@ -302,6 +305,9 @@ void omap_sram_idle(void)
 		if (core_next_state == PWRDM_POWER_OFF) {
 			omap3_core_save_context();
 			omap3_cm_save_context();
+
+			omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK,
+						   WKUP_MOD, PM_WKEN);
 		}
 	}
 
@@ -352,10 +358,10 @@ void omap_sram_idle(void)
 			omap3_sram_restore_context();
 			omap2_sms_restore_context();
 		}
-		if (core_next_state == PWRDM_POWER_OFF)
-			omap2_prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF_MASK,
-					       OMAP3430_GR_MOD,
-					       OMAP3_PRM_VOLTCTRL_OFFSET);
+		if (core_next_state == PWRDM_POWER_OFF) {
+			omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK,
+						     WKUP_MOD, PM_WKEN);
+		}
 	}
 	omap3_intc_resume_idle();
 
@@ -675,8 +681,10 @@ static void __init pm_errata_configure(void)
 		enable_omap3630_toggle_l2_on_restore();
 
 		if (omap_rev() < OMAP3630_REV_ES1_2)
-			pm34xx_errata |= (PM_SDRC_WAKEUP_ERRATUM_i583 |
-					  PM_PER_MEMORIES_ERRATUM_i582);
+			pm34xx_errata |= PM_PER_MEMORIES_ERRATUM_i582;
+#ifndef CONFIG_DISABLE_OMAP_ERRATA_i583
+			pm34xx_errata |= PM_SDRC_WAKEUP_ERRATUM_i583;
+#endif
 	} else if (cpu_is_omap34xx()) {
 		pm34xx_errata |= PM_PER_MEMORIES_ERRATUM_i582;
 	}
@@ -745,6 +753,9 @@ int __init omap3_pm_init(void)
 	omap_pm_suspend = omap3_pm_suspend;
 #endif
 
+	if (omap_pm_get_off_mode())
+		omap3_pm_off_mode_enable(true);
+
 	arm_pm_idle = omap3_pm_idle;
 	omap3_idle_init();