From: Tero Kristo <t-kristo@ti.com>
Date: Tue, 25 Feb 2014 16:04:56 +0000 (+0200)
Subject: ARM: OMAP3: PRM: move iva reset to PRM driver
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=9de367fae0d9907e19d065e0381ecd3f4003e08f;p=deliverable%2Flinux.git

ARM: OMAP3: PRM: move iva reset to PRM driver

This is a more proper isolation of the code. Done in preparation of making
PRM an individual driver.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
---

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 74d03f26d962..6d02573ac4c0 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -353,53 +353,6 @@ restore:
 #define omap3_pm_suspend NULL
 #endif /* CONFIG_SUSPEND */
 
-
-/**
- * omap3_iva_idle(): ensure IVA is in idle so it can be put into
- *                   retention
- *
- * In cases where IVA2 is activated by bootcode, it may prevent
- * full-chip retention or off-mode because it is not idle.  This
- * function forces the IVA2 into idle state so it can go
- * into retention/off and thus allow full-chip retention/off.
- *
- **/
-static void __init omap3_iva_idle(void)
-{
-	/* ensure IVA2 clock is disabled */
-	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
-
-	/* if no clock activity, nothing else to do */
-	if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
-	      OMAP3430_CLKACTIVITY_IVA2_MASK))
-		return;
-
-	/* Reset IVA2 */
-	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
-			  OMAP3430_RST2_IVA2_MASK |
-			  OMAP3430_RST3_IVA2_MASK,
-			  OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
-
-	/* Enable IVA2 clock */
-	omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,
-			 OMAP3430_IVA2_MOD, CM_FCLKEN);
-
-	/* Set IVA2 boot mode to 'idle' */
-	omap3_ctrl_set_iva_bootmode_idle();
-
-	/* Un-reset IVA2 */
-	omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
-
-	/* Disable IVA2 clock */
-	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
-
-	/* Reset IVA2 */
-	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
-			  OMAP3430_RST2_IVA2_MASK |
-			  OMAP3430_RST3_IVA2_MASK,
-			  OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
-}
-
 static void __init omap3_d2d_idle(void)
 {
 	u16 mask, padconf;
@@ -503,7 +456,7 @@ static void __init prcm_setup_regs(void)
 	/*
 	 * We need to idle iva2_pwrdm even on am3703 with no iva2.
 	 */
-	omap3_iva_idle();
+	omap3xxx_prm_iva_idle();
 
 	omap3_d2d_idle();
 }
diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 014ba70d2dfb..a575b6964bf9 100644
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -28,6 +28,7 @@
 #include "prm-regbits-34xx.h"
 #include "cm3xxx.h"
 #include "cm-regbits-34xx.h"
+#include "control.h"
 
 static const struct omap_prcm_irq omap3_prcm_irqs[] = {
 	OMAP_PRCM_IRQ("wkup",	0,	0),
@@ -329,6 +330,50 @@ static u32 omap3xxx_prm_read_reset_sources(void)
 	return r;
 }
 
+/**
+ * omap3xxx_prm_iva_idle - ensure IVA is in idle so it can be put into retention
+ *
+ * In cases where IVA2 is activated by bootcode, it may prevent
+ * full-chip retention or off-mode because it is not idle.  This
+ * function forces the IVA2 into idle state so it can go
+ * into retention/off and thus allow full-chip retention/off.
+ */
+void omap3xxx_prm_iva_idle(void)
+{
+	/* ensure IVA2 clock is disabled */
+	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+	/* if no clock activity, nothing else to do */
+	if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
+	      OMAP3430_CLKACTIVITY_IVA2_MASK))
+		return;
+
+	/* Reset IVA2 */
+	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
+				OMAP3430_RST2_IVA2_MASK |
+				OMAP3430_RST3_IVA2_MASK,
+				OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+
+	/* Enable IVA2 clock */
+	omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,
+			       OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+	/* Set IVA2 boot mode to 'idle' */
+	omap3_ctrl_set_iva_bootmode_idle();
+
+	/* Un-reset IVA2 */
+	omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+
+	/* Disable IVA2 clock */
+	omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
+
+	/* Reset IVA2 */
+	omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
+				OMAP3430_RST2_IVA2_MASK |
+				OMAP3430_RST3_IVA2_MASK,
+				OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
+}
+
 /* Powerdomain low-level functions */
 
 static int omap3_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
diff --git a/arch/arm/mach-omap2/prm3xxx.h b/arch/arm/mach-omap2/prm3xxx.h
index 14a5fbc8ac57..007ff59602fd 100644
--- a/arch/arm/mach-omap2/prm3xxx.h
+++ b/arch/arm/mach-omap2/prm3xxx.h
@@ -163,6 +163,7 @@ extern void omap3xxx_prm_dpll3_reset(void);
 extern int __init omap3xxx_prm_init(void);
 extern u32 omap3xxx_prm_get_reset_sources(void);
 int omap3xxx_prm_clear_mod_irqs(s16 module, u8 regs, u32 ignore_bits);
+void omap3xxx_prm_iva_idle(void);
 
 #endif /* __ASSEMBLER */