[PATCH 16/21] OMAP3+: SR: introduce class private data per voltage domain

[Jean Pihet]

From: Nishanth Menon <nm at ti.com>

Introduce private data for class drivers to operate on per
voltage domain. This removes the necessity for drivers such
as SmartReflex AVS Class 1.5 drivers from maintaining
a special lookup table which does not scale when number of
voltage domains change depending on silicon. It also makes
the life of such class drivers to be faster without having
to do a double lookup to get to their voltage domain specific
private data

Change-Id: Icfcd7b229e56cfc1179d2aad1dbf09bb503e292a
Signed-off-by: Nishanth Menon <nm at ti.com>
Signed-off-by: Jean Pihet <j-pihet at ti.com>
---
 arch/arm/mach-omap2/smartreflex-class3.c |   10 +++++++---
 arch/arm/mach-omap2/smartreflex.c        |   23 +++++++++++++----------
 arch/arm/mach-omap2/smartreflex.h        |   16 ++++++++++------
 3 files changed, 30 insertions(+), 19 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex-class3.c b/arch/arm/mach-omap2/smartreflex-class3.c
index 955566e..9dcda93 100644
--- a/arch/arm/mach-omap2/smartreflex-class3.c
+++ b/arch/arm/mach-omap2/smartreflex-class3.c
@@ -13,7 +13,8 @@
 
 #include "smartreflex.h"
 
-static int sr_class3_enable(struct voltagedomain *voltdm)
+static int sr_class3_enable(struct voltagedomain *voltdm,
+			    void *voltdm_cdata)
 {
 	unsigned long volt = voltdm_get_voltage(voltdm);
 
@@ -27,7 +28,9 @@ static int sr_class3_enable(struct voltagedomain *voltdm)
 	return sr_enable(voltdm, volt);
 }
 
-static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
+static int sr_class3_disable(struct voltagedomain *voltdm,
+			     void *voltdm_cdata,
+			     int is_volt_reset)
 {
 	sr_disable_errgen(voltdm);
 	omap_vp_disable(voltdm);
@@ -38,7 +41,8 @@ static int sr_class3_disable(struct voltagedomain *voltdm, int is_volt_reset)
 	return 0;
 }
 
-static int sr_class3_configure(struct voltagedomain *voltdm)
+static int sr_class3_configure(struct voltagedomain *voltdm,
+			       void *voltdm_cdata)
 {
 	return sr_configure_errgen(voltdm);
 }
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 6971b94..65e1a7c 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -56,6 +56,8 @@ struct omap_sr {
 	struct list_head		node;
 	struct omap_sr_nvalue_table	*nvalue_table;
 	struct voltagedomain		*voltdm;
+	/* Managed by class driver as needed */
+	void				*voltdm_cdata;
 	struct dentry			*dbg_dir;
 };
 
@@ -224,8 +226,8 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 		sr_info->irq_enabled = false;
 	} else {
 		/* If the caller reports inability to handle, disable as well */
-		if (sr_class->notify &&
-		    sr_class->notify(sr_info->voltdm, value)) {
+		if (sr_class->notify && sr_class->notify(sr_info->voltdm,
+						sr_info->voltdm_cdata, value)) {
 			dev_err(&sr_info->pdev->dev, "%s: Callback cant handle!"
 				"status=0x%08x. Disabling to prevent spam!!\n",
 				__func__, status);
@@ -311,13 +313,14 @@ static void sr_start_vddautocomp(struct omap_sr *sr)
 	}
 
 	if (sr_class->init &&
-	    sr_class->init(sr->voltdm, sr_class->class_priv_data)) {
+	    sr_class->init(sr->voltdm, &sr->voltdm_cdata,
+			   sr_class->class_priv_data)) {
 		dev_err(&sr->pdev->dev,
 			"%s: SRClass initialization failed\n", __func__);
 		return;
 	}
 
-	if (!sr_class->enable(sr->voltdm))
+	if (!sr_class->enable(sr->voltdm, sr->voltdm_cdata))
 		sr->autocomp_active = true;
 }
 
@@ -331,9 +334,9 @@ static void sr_stop_vddautocomp(struct omap_sr *sr)
 	}
 
 	if (sr->autocomp_active) {
-		sr_class->disable(sr->voltdm, 1);
+		sr_class->disable(sr->voltdm, sr->voltdm_cdata, 1);
 		if (sr_class->deinit &&
-		    sr_class->deinit(sr->voltdm,
+		    sr_class->deinit(sr->voltdm, &sr->voltdm_cdata,
 			    sr_class->class_priv_data)) {
 			dev_err(&sr->pdev->dev,
 				"%s: SR[%d]Class deinitialization failed\n",
@@ -736,7 +739,7 @@ int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
 		return 0;
 
 	/* Configure SR */
-	ret = sr_class->configure(voltdm);
+	ret = sr_class->configure(voltdm, sr->voltdm_cdata);
 	if (ret)
 		return ret;
 
@@ -911,7 +914,7 @@ void omap_sr_enable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->enable(voltdm);
+	sr_class->enable(voltdm, sr->voltdm_cdata);
 }
 
 /**
@@ -944,7 +947,7 @@ void omap_sr_disable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->disable(voltdm, 0);
+	sr_class->disable(voltdm, sr->voltdm_cdata, 0);
 }
 
 /**
@@ -977,7 +980,7 @@ void omap_sr_disable_reset_volt(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->disable(voltdm, 1);
+	sr_class->disable(voltdm, sr->voltdm_cdata, 1);
 }
 
 /**
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index 8660049..0e4553fc 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -195,12 +195,16 @@ struct omap_smartreflex_dev_attr {
  * @class_priv_data:	Class specific private data (optional)
  */
 struct omap_sr_class_data {
-	int (*enable)(struct voltagedomain *voltdm);
-	int (*disable)(struct voltagedomain *voltdm, int is_volt_reset);
-	int (*init)(struct voltagedomain *voltdm, void *class_priv_data);
-	int (*deinit)(struct voltagedomain *voltdm, void *class_priv_data);
-	int (*configure)(struct voltagedomain *voltdm);
-	int (*notify)(struct voltagedomain *voltdm, u32 status);
+	int (*enable)(struct voltagedomain *voltdm, void *voltdm_cdata);
+	int (*disable)(struct voltagedomain *voltdm, void *voltdm_cdata,
+		       int is_volt_reset);
+	int (*init)(struct voltagedomain *voltdm, void **voltdm_cdata,
+		    void *class_priv_data);
+	int (*deinit)(struct voltagedomain *voltdm, void **voltdm_cdata,
+		      void *class_priv_data);
+	int (*configure)(struct voltagedomain *voltdm, void *voltdm_cdata);
+	int (*notify)(struct voltagedomain *voltdm, void *voltdm_cdata,
+		      u32 status);
 	u8 notify_flags;
 	u8 class_type;
 	void *class_priv_data;
-- 
1.7.5.4