[PATCHv4 4/6] ARM: OMAP3+: PRM: Enable IO wake up

[Tero Kristo]

Enable IO Wake up for OMAP3/4 as part of PRM Init. Currently this has been
managed in cpuidle path which is not the right place. Subsequent patch
will remove IO Daisy chain handling in cpuidle path once daisy chain is
handled as part of hwmod mux. This patch also moves the OMAP4 IO wakeup
enable code from the trigger function to init time setup.

Signed-off-by: Tero Kristo <t-kristo at ti.com>
---
 arch/arm/mach-omap2/prm2xxx_3xxx.c |   11 ++++++++++-
 arch/arm/mach-omap2/prm44xx.c      |   18 ++++++++++--------
 2 files changed, 20 insertions(+), 9 deletions(-)

diff --git a/arch/arm/mach-omap2/prm2xxx_3xxx.c b/arch/arm/mach-omap2/prm2xxx_3xxx.c
index 4f4f08a..f681628 100644
--- a/arch/arm/mach-omap2/prm2xxx_3xxx.c
+++ b/arch/arm/mach-omap2/prm2xxx_3xxx.c
@@ -337,10 +337,19 @@ void omap3_disable_io_chain(void)
 					     WKUP_MOD, PM_WKEN);
 }
 
+static void __init omap3_enable_io_wakeup(void)
+{
+	if (omap3_has_io_wakeup())
+		omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
+					   PM_WKEN);
+}
+
 static int __init omap3xxx_prcm_init(void)
 {
-	if (cpu_is_omap34xx())
+	if (cpu_is_omap34xx()) {
+		omap3_enable_io_wakeup();
 		return omap_prcm_register_chain_handler(&omap3_prcm_irq_setup);
+	}
 	return 0;
 }
 subsys_initcall(omap3xxx_prcm_init);
diff --git a/arch/arm/mach-omap2/prm44xx.c b/arch/arm/mach-omap2/prm44xx.c
index caa5e0f..4ce6f08 100644
--- a/arch/arm/mach-omap2/prm44xx.c
+++ b/arch/arm/mach-omap2/prm44xx.c
@@ -242,13 +242,6 @@ void omap4_trigger_io_chain(void)
 {
 	int i = 0;
 
-	/* Enable GLOBAL_WUEN */
-	if (!(omap4_prm_read_inst_reg(OMAP4430_PRM_DEVICE_INST,
-		OMAP4_PRM_IO_PMCTRL_OFFSET) & OMAP4430_GLOBAL_WUEN_MASK))
-		omap4_prm_rmw_inst_reg_bits(OMAP4430_GLOBAL_WUEN_MASK,
-			OMAP4430_GLOBAL_WUEN_MASK, OMAP4430_PRM_DEVICE_INST,
-			OMAP4_PRM_IO_PMCTRL_OFFSET);
-
 	/* Trigger WUCLKIN enable */
 	omap4_prm_rmw_inst_reg_bits(OMAP4430_WUCLK_CTRL_MASK,
 			OMAP4430_WUCLK_CTRL_MASK, OMAP4430_PRM_DEVICE_INST,
@@ -272,10 +265,19 @@ void omap4_trigger_io_chain(void)
 	return;
 }
 
+static void __init omap4_enable_io_wakeup(void)
+{
+	omap4_prm_rmw_inst_reg_bits(OMAP4430_GLOBAL_WUEN_MASK,
+			OMAP4430_GLOBAL_WUEN_MASK, OMAP4430_PRM_DEVICE_INST,
+			OMAP4_PRM_IO_PMCTRL_OFFSET);
+}
+
 static int __init omap4xxx_prcm_init(void)
 {
-	if (cpu_is_omap44xx())
+	if (cpu_is_omap44xx()) {
+		omap4_enable_io_wakeup();
 		return omap_prcm_register_chain_handler(&omap4_prcm_irq_setup);
+	}
 	return 0;
 }
 subsys_initcall(omap4xxx_prcm_init);
-- 
1.7.4.1