ARM: omap_hwmod: add api to enable/disable module level wakeup

From: "Govindraj.R" <[email protected]>

On 24xx/34xx/36xx Module level wakeup events are enabled/disabled using PM_WKEN1_CORE/PM_WKEN_PER regs. The module level wakeups are enabled by default from bootloader,

however the wakeups can be enabled/disabled
using sysfs entry example for uart:
echo disabled > /sys/devices/platform/omap/omap_uart.X/power/wakeup [X=0,1,2,3]

So expand omap2 prcm structure to incorporate the PM_WKEN reg offset and bit mask to control the module level wakeup. This info from hwmod data can be used hwmod framework omap_hwmod_enable/disable_wakeup.

Cc Paul Walmsley <[email protected]>

Cc Kevin Hilman <[email protected]>

Signed-off-by Govindraj.R <[email protected]>

---
 arch/arm/mach-omap2/omap_hwmod_2420_data.c   |    6 ++++++
 arch/arm/mach-omap2/omap_hwmod_2430_data.c   |    6 ++++++
 arch/arm/mach-omap2/omap_hwmod_3xxx_data.c   |    8 ++++++++
 arch/arm/plat-omap/include/plat/omap_hwmod.h |    4 ++++
 4 files changed, 24 insertions(+), 0 deletions(-)

arch/arm/mach-omap2/omap_hwmod_2420_data.c +6 -0

index a5409ce..676274b 100644
@@ -791,6 +791,8 @@ static struct omap_hwmod omap2420_uart1_hwmod = {
 			.module_bit = OMAP24XX_EN_UART1_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP24XX_EN_UART1_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP24XX_ST_UART1_MASK,
 		},
 	},
 	.slaves		= omap2420_uart1_slaves,

@@ -816,6 +818,8 @@ static struct omap_hwmod omap2420_uart2_hwmod = {
 			.module_bit = OMAP24XX_EN_UART2_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP24XX_EN_UART2_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP24XX_ST_UART2_MASK,
 		},
 	},
 	.slaves		= omap2420_uart2_slaves,

@@ -841,6 +845,8 @@ static struct omap_hwmod omap2420_uart3_hwmod = {
 			.module_bit = OMAP24XX_EN_UART3_SHIFT,
 			.idlest_reg_id = 2,
 			.idlest_idle_bit = OMAP24XX_EN_UART3_SHIFT,
+			.module_wakeup_offs = OMAP24XX_PM_WKEN2,
+			.module_wakeup_bit = OMAP24XX_ST_UART3_MASK,
 		},
 	},
 	.slaves		= omap2420_uart3_slaves,

arch/arm/mach-omap2/omap_hwmod_2430_data.c +6 -0

index c4f56cb..94d4463 100644
@@ -864,6 +864,8 @@ static struct omap_hwmod omap2430_uart1_hwmod = {
 			.module_bit = OMAP24XX_EN_UART1_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP24XX_EN_UART1_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP24XX_ST_UART1_MASK,
 		},
 	},
 	.slaves		= omap2430_uart1_slaves,

@@ -889,6 +891,8 @@ static struct omap_hwmod omap2430_uart2_hwmod = {
 			.module_bit = OMAP24XX_EN_UART2_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP24XX_EN_UART2_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP24XX_ST_UART2_MASK,
 		},
 	},
 	.slaves		= omap2430_uart2_slaves,

@@ -914,6 +918,8 @@ static struct omap_hwmod omap2430_uart3_hwmod = {
 			.module_bit = OMAP24XX_EN_UART3_SHIFT,
 			.idlest_reg_id = 2,
 			.idlest_idle_bit = OMAP24XX_EN_UART3_SHIFT,
+			.module_wakeup_offs = OMAP24XX_PM_WKEN2,
+			.module_wakeup_bit = OMAP24XX_ST_UART3_MASK,
 		},
 	},
 	.slaves		= omap2430_uart3_slaves,

arch/arm/mach-omap2/omap_hwmod_3xxx_data.c +8 -0

index 34b9766d..9ed038d 100644
@@ -1248,6 +1248,8 @@ static struct omap_hwmod omap3xxx_uart1_hwmod = {
 			.module_bit = OMAP3430_EN_UART1_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP3430_EN_UART1_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP3430_ST_UART1_MASK,
 		},
 	},
 	.slaves		= omap3xxx_uart1_slaves,

@@ -1273,6 +1275,8 @@ static struct omap_hwmod omap3xxx_uart2_hwmod = {
 			.module_bit = OMAP3430_EN_UART2_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP3430_EN_UART2_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP3430_ST_UART2_MASK,
 		},
 	},
 	.slaves		= omap3xxx_uart2_slaves,

@@ -1298,6 +1302,8 @@ static struct omap_hwmod omap3xxx_uart3_hwmod = {
 			.module_bit = OMAP3430_EN_UART3_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP3430_EN_UART3_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP3430_ST_UART3_MASK,
 		},
 	},
 	.slaves		= omap3xxx_uart3_slaves,

@@ -1334,6 +1340,8 @@ static struct omap_hwmod omap3xxx_uart4_hwmod = {
 			.module_bit = OMAP3630_EN_UART4_SHIFT,
 			.idlest_reg_id = 1,
 			.idlest_idle_bit = OMAP3630_EN_UART4_SHIFT,
+			.module_wakeup_offs = PM_WKEN1,
+			.module_wakeup_bit = OMAP3630_ST_UART4_MASK,
 		},
 	},
 	.slaves		= omap3xxx_uart4_slaves,

arch/arm/plat-omap/include/plat/omap_hwmod.h +4 -0

index 8070145..5c7711b 100644
@@ -343,6 +343,8 @@ struct omap_hwmod_class_sysconfig {
  * @idlest_reg_id: IDLEST register ID (e.g., 3 for CM_IDLEST3)
  * @idlest_idle_bit: register bit shift for CM_IDLEST slave idle bit
  * @idlest_stdby_bit: register bit shift for CM_IDLEST master standby bit
+ * @module_wakeup_offs: PRCM register offset for PM_WKEN
+ * @module_wakeup_bit: regiter bit mask for PM_WKEN
  *
  * @prcm_reg_id and @module_bit are specific to the AUTOIDLE, WKST,
  * WKEN, GRPSEL registers.  In an ideal world, no extra information

@@ -357,6 +359,8 @@ struct omap_hwmod_omap2_prcm {
 	u8 idlest_reg_id;
 	u8 idlest_idle_bit;
 	u8 idlest_stdby_bit;
+	s16 module_wakeup_offs;
+	u32 module_wakeup_bit;
 };

arch/arm/mach-omap2/omap_hwmod.c +17 -0

index 2c27fdb..05576ae 100644
@@ -382,6 +382,35 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle,
 }
 
 /**
+ * _enable_module_level_wakeup - enable/disable module level wakeup on hwmod.
+ * @oh: struct omap_hwmod *
+ * @set_wake: bool value indicating to set (true) or clear (false) module level
+ *		wakeup enable
+ *
+ * Set or clear the  module level wakeup capability the
+ * hwmod @oh. This function configures th PM_WKEN reg bits if they
+ * are available from hwmod. No return value
+ */
+static void _enable_module_level_wakeup(struct omap_hwmod *oh, bool set_wake)
+{
+	u32 v;
+
+	if (oh->prcm.omap2.module_wakeup_offs &&
+			oh->prcm.omap2.module_wakeup_bit) {
+		v = omap2_prm_read_mod_reg(oh->prcm.omap2.module_offs,
+				oh->prcm.omap2.module_wakeup_offs);