[PATCH 0/6] ARM: OMAP3+: smartreflex: add class support

[PATCH 0/6] ARM: OMAP3+: smartreflex: add class support

[jean.pihet]

From: Jean Pihet <j-pihet@ti.com>

Add the class support so that various classes of operation can be
implemented (class 1p5 etc.).

Based on linux-omap's master branch (3.3.0-rc6), commit
85244e0edd240da2004bb2ab7cbcbc67a336f20d


Nishanth Menon (6):
  ARM: OMAP3+: SmartReflex: introduce class init, deinit and priv data
  ARM: OMAP3+: SmartReflex: introduce notifiers flags
  ARM: OMAP3+: SmartReflex: introduce notifier_control
  ARM: OMAP3+: SmartReflex: disable spamming interrupts
  ARM: OMAP3+: SmartReflex: introduce class private data per voltage
    domain
  ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

 arch/arm/mach-omap2/smartreflex-class3.c |   15 ++-
 arch/arm/mach-omap2/smartreflex.c        |  193 ++++++++++++++++++++++++++++--
 arch/arm/mach-omap2/smartreflex.h        |   30 ++++-
 3 files changed, 222 insertions(+), 16 deletions(-)

-- 
1.7.5.4

[PATCH 0/6] ARM: OMAP3+: smartreflex: add class support

[jean.pihet at newoldbits.com]

From: Jean Pihet <j-pihet@ti.com>

Add the class support so that various classes of operation can be
implemented (class 1p5 etc.).

Based on linux-omap's master branch (3.3.0-rc6), commit
85244e0edd240da2004bb2ab7cbcbc67a336f20d


Nishanth Menon (6):
  ARM: OMAP3+: SmartReflex: introduce class init, deinit and priv data
  ARM: OMAP3+: SmartReflex: introduce notifiers flags
  ARM: OMAP3+: SmartReflex: introduce notifier_control
  ARM: OMAP3+: SmartReflex: disable spamming interrupts
  ARM: OMAP3+: SmartReflex: introduce class private data per voltage
    domain
  ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

 arch/arm/mach-omap2/smartreflex-class3.c |   15 ++-
 arch/arm/mach-omap2/smartreflex.c        |  193 ++++++++++++++++++++++++++++--
 arch/arm/mach-omap2/smartreflex.h        |   30 ++++-
 3 files changed, 222 insertions(+), 16 deletions(-)

-- 
1.7.5.4

[PATCH 1/6] ARM: OMAP3+: SmartReflex: introduce class init, deinit and priv data

[jean.pihet]

From: Nishanth Menon <nm@ti.com>

Certain class drivers such as class 1.5 drivers, will need specific
notification that they have to be inited up or deinited independent
of smart reflex operation. They also may need private data to be
used for operations of their own, provide the same.
This allows the class driver to initialize it's internal data structures
on a need basis in preparation for the specific domain's autocomp usage.
The resultant operation is as follows:
when autocomp is set to 1 -> class drivers' init is called
The existing enable/disable is still used as before by the SmartReflex
core driver to enable disable the class operation.
When autocomp is set to 0 -> class drivers' deinit is called, signaling
the end of usage for that domain.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   15 +++++++++++++++
 arch/arm/mach-omap2/smartreflex.h |    6 ++++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 008fbd7..058255a 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -226,6 +226,13 @@ static void sr_start_vddautocomp(struct omap_sr *sr)
 		return;
 	}
 
+	if (sr_class->init &&
+	    sr_class->init(sr->voltdm, sr_class->class_priv_data)) {
+		dev_err(&sr->pdev->dev,
+			"%s: SRClass initialization failed\n", __func__);
+		return;
+	}
+
 	if (!sr_class->enable(sr->voltdm))
 		sr->autocomp_active = true;
 }
@@ -241,6 +248,14 @@ static void sr_stop_vddautocomp(struct omap_sr *sr)
 
 	if (sr->autocomp_active) {
 		sr_class->disable(sr->voltdm, 1);
+		if (sr_class->deinit &&
+		    sr_class->deinit(sr->voltdm,
+			    sr_class->class_priv_data)) {
+			dev_err(&sr->pdev->dev,
+				"%s: SR[%d]Class deinitialization failed\n",
+				__func__, sr->srid);
+		}
+
 		sr->autocomp_active = false;
 	}
 }
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index 5809141..dd5b21e 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -177,6 +177,8 @@ struct omap_smartreflex_dev_attr {
  *
  * @enable:		API to enable a particular class smaartreflex.
  * @disable:		API to disable a particular class smartreflex.
+ * @init:		API to do class specific initialization (optional)
+ * @deinit:		API to do class specific deinitialization (optional)
  * @configure:		API to configure a particular class smartreflex.
  * @notify:		API to notify the class driver about an event in SR.
  *			Not needed for class3.
@@ -184,14 +186,18 @@ struct omap_smartreflex_dev_attr {
  * @class_type:		specify which smartreflex class.
  *			Can be used by the SR driver to take any class
  *			based decisions.
+ * @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);
 	u8 notify_flags;
 	u8 class_type;
+	void *class_priv_data;
 };
 
 /**
-- 
1.7.5.4

[PATCH 1/6] ARM: OMAP3+: SmartReflex: introduce class init, deinit and priv data

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@ti.com>

Certain class drivers such as class 1.5 drivers, will need specific
notification that they have to be inited up or deinited independent
of smart reflex operation. They also may need private data to be
used for operations of their own, provide the same.
This allows the class driver to initialize it's internal data structures
on a need basis in preparation for the specific domain's autocomp usage.
The resultant operation is as follows:
when autocomp is set to 1 -> class drivers' init is called
The existing enable/disable is still used as before by the SmartReflex
core driver to enable disable the class operation.
When autocomp is set to 0 -> class drivers' deinit is called, signaling
the end of usage for that domain.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   15 +++++++++++++++
 arch/arm/mach-omap2/smartreflex.h |    6 ++++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 008fbd7..058255a 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -226,6 +226,13 @@ static void sr_start_vddautocomp(struct omap_sr *sr)
 		return;
 	}
 
+	if (sr_class->init &&
+	    sr_class->init(sr->voltdm, sr_class->class_priv_data)) {
+		dev_err(&sr->pdev->dev,
+			"%s: SRClass initialization failed\n", __func__);
+		return;
+	}
+
 	if (!sr_class->enable(sr->voltdm))
 		sr->autocomp_active = true;
 }
@@ -241,6 +248,14 @@ static void sr_stop_vddautocomp(struct omap_sr *sr)
 
 	if (sr->autocomp_active) {
 		sr_class->disable(sr->voltdm, 1);
+		if (sr_class->deinit &&
+		    sr_class->deinit(sr->voltdm,
+			    sr_class->class_priv_data)) {
+			dev_err(&sr->pdev->dev,
+				"%s: SR[%d]Class deinitialization failed\n",
+				__func__, sr->srid);
+		}
+
 		sr->autocomp_active = false;
 	}
 }
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index 5809141..dd5b21e 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -177,6 +177,8 @@ struct omap_smartreflex_dev_attr {
  *
  * @enable:		API to enable a particular class smaartreflex.
  * @disable:		API to disable a particular class smartreflex.
+ * @init:		API to do class specific initialization (optional)
+ * @deinit:		API to do class specific deinitialization (optional)
  * @configure:		API to configure a particular class smartreflex.
  * @notify:		API to notify the class driver about an event in SR.
  *			Not needed for class3.
@@ -184,14 +186,18 @@ struct omap_smartreflex_dev_attr {
  * @class_type:		specify which smartreflex class.
  *			Can be used by the SR driver to take any class
  *			based decisions.
+ * @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);
 	u8 notify_flags;
 	u8 class_type;
+	void *class_priv_data;
 };
 
 /**
-- 
1.7.5.4

[PATCH 2/6] ARM: OMAP3+: SmartReflex: introduce notifiers flags

[jean.pihet]

From: Nishanth Menon <nm@ti.com>

SmartReflex IP V1 and V2 have different registers and offsets.
Currently, we pass the status as is to the class driver. However,
since we don't pass the version of the underlying SR hardware
to the Class driver, it will not be unable to make consistent
sense of the status bits coming over to it.

A class driver should be able to function without dependency
on the exact IP version it is actually running on. We hence
introduce our own translation in software level for a generic
notification flag.

As part of this change, we will now call the notifier if we get
a match with the notifier flags that the class driver requested.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   79 ++++++++++++++++++++++++++++++++++++-
 arch/arm/mach-omap2/smartreflex.h |    6 +++
 2 files changed, 83 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 058255a..7977018 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -121,25 +121,100 @@ static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
 	return ERR_PTR(-ENODATA);
 }
 
+static inline u32 notifier_to_irqen_v1(u8 notify_flags)
+{
+	u32 val;
+
+	val = (notify_flags & SR_NOTIFY_MCUACCUM) ?
+		ERRCONFIG_MCUACCUMINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUVALID) ?
+		ERRCONFIG_MCUVALIDINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUBOUND) ?
+		ERRCONFIG_MCUBOUNDINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUDISACK) ?
+		ERRCONFIG_MCUDISACKINTEN : 0;
+
+	return val;
+}
+
+static inline u32 notifier_to_irqen_v2(u8 notify_flags)
+{
+	u32 val;
+
+	val = (notify_flags & SR_NOTIFY_MCUACCUM) ?
+		IRQENABLE_MCUACCUMINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUVALID) ?
+		IRQENABLE_MCUVALIDINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUBOUND) ?
+		IRQENABLE_MCUBOUNDSINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUDISACK) ?
+		IRQENABLE_MCUDISABLEACKINT : 0;
+
+	return val;
+}
+
+static inline u8 irqstat_to_notifier_v1(u32 status)
+{
+	u8 val;
+
+	val = (status & ERRCONFIG_MCUACCUMINTST) ?
+		SR_NOTIFY_MCUACCUM : 0;
+	val |= (status & ERRCONFIG_MCUVALIDINTEN) ?
+		SR_NOTIFY_MCUVALID : 0;
+	val |= (status & ERRCONFIG_MCUBOUNDINTEN) ?
+		SR_NOTIFY_MCUBOUND : 0;
+	val |= (status & ERRCONFIG_MCUDISACKINTEN) ?
+		SR_NOTIFY_MCUDISACK : 0;
+
+	return val;
+}
+
+static inline u8 irqstat_to_notifier_v2(u32 status)
+{
+	u8 val;
+
+	val = (status & IRQENABLE_MCUACCUMINT) ?
+		SR_NOTIFY_MCUACCUM : 0;
+	val |= (status & IRQENABLE_MCUVALIDINT) ?
+		SR_NOTIFY_MCUVALID : 0;
+	val |= (status & IRQENABLE_MCUBOUNDSINT) ?
+		SR_NOTIFY_MCUBOUND : 0;
+	val |= (status & IRQENABLE_MCUDISABLEACKINT) ?
+		SR_NOTIFY_MCUDISACK : 0;
+
+	return val;
+}
+
+
 static irqreturn_t sr_interrupt(int irq, void *data)
 {
 	struct omap_sr *sr_info = data;
 	u32 status = 0;
+	u32 value = 0;
 
 	switch (sr_info->ip_type) {
 	case SR_TYPE_V1:
+		/* Status bits are one bit before enable bits in v1 */
+		value = notifier_to_irqen_v1(sr_class->notify_flags) >> 1;
+
 		/* Read the status bits */
 		status = sr_read_reg(sr_info, ERRCONFIG_V1);
+		status &= value;
 
 		/* Clear them by writing back */
-		sr_write_reg(sr_info, ERRCONFIG_V1, status);
+		sr_modify_reg(sr_info, ERRCONFIG_V1, value, status);
+
+		value = irqstat_to_notifier_v1(status);
 		break;
 	case SR_TYPE_V2:
+		value = notifier_to_irqen_v2(sr_class->notify_flags);
 		/* Read the status bits */
 		status = sr_read_reg(sr_info, IRQSTATUS);
+		status &= value;
 
 		/* Clear them by writing back */
 		sr_write_reg(sr_info, IRQSTATUS, status);
+		value = irqstat_to_notifier_v2(status);
 		break;
 	default:
 		dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n",
@@ -148,7 +223,7 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 	}
 
 	if (sr_class->notify)
-		sr_class->notify(sr_info->voltdm, status);
+		sr_class->notify(sr_info->voltdm, value);
 
 	return IRQ_HANDLED;
 }
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index dd5b21e..da00f8c 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -142,6 +142,12 @@
 #define OMAP3430_SR_ERRWEIGHT		0x04
 #define OMAP3430_SR_ERRMAXLIMIT		0x02
 
+/* Smart reflex notifiers for class drivers to use */
+#define SR_NOTIFY_MCUDISACK		BIT(3)
+#define SR_NOTIFY_MCUBOUND		BIT(2)
+#define SR_NOTIFY_MCUVALID		BIT(1)
+#define SR_NOTIFY_MCUACCUM		BIT(0)
+
 /**
  * struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
  *				pmic specific info to smartreflex driver
-- 
1.7.5.4

[PATCH 2/6] ARM: OMAP3+: SmartReflex: introduce notifiers flags

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@ti.com>

SmartReflex IP V1 and V2 have different registers and offsets.
Currently, we pass the status as is to the class driver. However,
since we don't pass the version of the underlying SR hardware
to the Class driver, it will not be unable to make consistent
sense of the status bits coming over to it.

A class driver should be able to function without dependency
on the exact IP version it is actually running on. We hence
introduce our own translation in software level for a generic
notification flag.

As part of this change, we will now call the notifier if we get
a match with the notifier flags that the class driver requested.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   79 ++++++++++++++++++++++++++++++++++++-
 arch/arm/mach-omap2/smartreflex.h |    6 +++
 2 files changed, 83 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 058255a..7977018 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -121,25 +121,100 @@ static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
 	return ERR_PTR(-ENODATA);
 }
 
+static inline u32 notifier_to_irqen_v1(u8 notify_flags)
+{
+	u32 val;
+
+	val = (notify_flags & SR_NOTIFY_MCUACCUM) ?
+		ERRCONFIG_MCUACCUMINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUVALID) ?
+		ERRCONFIG_MCUVALIDINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUBOUND) ?
+		ERRCONFIG_MCUBOUNDINTEN : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUDISACK) ?
+		ERRCONFIG_MCUDISACKINTEN : 0;
+
+	return val;
+}
+
+static inline u32 notifier_to_irqen_v2(u8 notify_flags)
+{
+	u32 val;
+
+	val = (notify_flags & SR_NOTIFY_MCUACCUM) ?
+		IRQENABLE_MCUACCUMINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUVALID) ?
+		IRQENABLE_MCUVALIDINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUBOUND) ?
+		IRQENABLE_MCUBOUNDSINT : 0;
+	val |= (notify_flags & SR_NOTIFY_MCUDISACK) ?
+		IRQENABLE_MCUDISABLEACKINT : 0;
+
+	return val;
+}
+
+static inline u8 irqstat_to_notifier_v1(u32 status)
+{
+	u8 val;
+
+	val = (status & ERRCONFIG_MCUACCUMINTST) ?
+		SR_NOTIFY_MCUACCUM : 0;
+	val |= (status & ERRCONFIG_MCUVALIDINTEN) ?
+		SR_NOTIFY_MCUVALID : 0;
+	val |= (status & ERRCONFIG_MCUBOUNDINTEN) ?
+		SR_NOTIFY_MCUBOUND : 0;
+	val |= (status & ERRCONFIG_MCUDISACKINTEN) ?
+		SR_NOTIFY_MCUDISACK : 0;
+
+	return val;
+}
+
+static inline u8 irqstat_to_notifier_v2(u32 status)
+{
+	u8 val;
+
+	val = (status & IRQENABLE_MCUACCUMINT) ?
+		SR_NOTIFY_MCUACCUM : 0;
+	val |= (status & IRQENABLE_MCUVALIDINT) ?
+		SR_NOTIFY_MCUVALID : 0;
+	val |= (status & IRQENABLE_MCUBOUNDSINT) ?
+		SR_NOTIFY_MCUBOUND : 0;
+	val |= (status & IRQENABLE_MCUDISABLEACKINT) ?
+		SR_NOTIFY_MCUDISACK : 0;
+
+	return val;
+}
+
+
 static irqreturn_t sr_interrupt(int irq, void *data)
 {
 	struct omap_sr *sr_info = data;
 	u32 status = 0;
+	u32 value = 0;
 
 	switch (sr_info->ip_type) {
 	case SR_TYPE_V1:
+		/* Status bits are one bit before enable bits in v1 */
+		value = notifier_to_irqen_v1(sr_class->notify_flags) >> 1;
+
 		/* Read the status bits */
 		status = sr_read_reg(sr_info, ERRCONFIG_V1);
+		status &= value;
 
 		/* Clear them by writing back */
-		sr_write_reg(sr_info, ERRCONFIG_V1, status);
+		sr_modify_reg(sr_info, ERRCONFIG_V1, value, status);
+
+		value = irqstat_to_notifier_v1(status);
 		break;
 	case SR_TYPE_V2:
+		value = notifier_to_irqen_v2(sr_class->notify_flags);
 		/* Read the status bits */
 		status = sr_read_reg(sr_info, IRQSTATUS);
+		status &= value;
 
 		/* Clear them by writing back */
 		sr_write_reg(sr_info, IRQSTATUS, status);
+		value = irqstat_to_notifier_v2(status);
 		break;
 	default:
 		dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n",
@@ -148,7 +223,7 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 	}
 
 	if (sr_class->notify)
-		sr_class->notify(sr_info->voltdm, status);
+		sr_class->notify(sr_info->voltdm, value);
 
 	return IRQ_HANDLED;
 }
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index dd5b21e..da00f8c 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -142,6 +142,12 @@
 #define OMAP3430_SR_ERRWEIGHT		0x04
 #define OMAP3430_SR_ERRMAXLIMIT		0x02
 
+/* Smart reflex notifiers for class drivers to use */
+#define SR_NOTIFY_MCUDISACK		BIT(3)
+#define SR_NOTIFY_MCUBOUND		BIT(2)
+#define SR_NOTIFY_MCUVALID		BIT(1)
+#define SR_NOTIFY_MCUACCUM		BIT(0)
+
 /**
  * struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
  *				pmic specific info to smartreflex driver
-- 
1.7.5.4

[PATCH 3/6] ARM: OMAP3+: SmartReflex: introduce notifier_control

[jean.pihet]

From: Nishanth Menon <nm@ti.com>

We need some mechanism from class drivers to control when notifiers
should be triggered and when not, currently we have none, which makes
Class driver usage of the interrupt events almost impossible.

We also ensure that disable/enable or irq is always guarenteed to be
paired. The need to do this is because of the mixture of interrupt based
and polling based operations that is implemented as the most optimal
strategy for various SmartReflex AVS class

Introduce an SmartReflex driver API for doing the same. This is useful
for SmartReflex AVS class 1.5 or 2 drivers.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   65 +++++++++++++++++++++++++++++++++++++
 arch/arm/mach-omap2/smartreflex.h |    6 +++
 2 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 7977018..dfe8075 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -45,6 +45,7 @@ struct omap_sr {
 	int				srid;
 	int				ip_type;
 	int				nvalue_count;
+	bool				irq_enabled;
 	bool				autocomp_active;
 	u32				clk_length;
 	u32				err_weight;
@@ -799,6 +800,70 @@ void sr_disable(struct voltagedomain *voltdm)
 }
 
 /**
+ * sr_notifier_control() - control the notifier mechanism
+ * @voltdm:	VDD pointer to which the SR module to be configured belongs to.
+ * @enable:	true to enable notifiers and false to disable the same
+ *
+ * SR modules allow an MCU interrupt mechanism that vary based on the IP
+ * revision, we allow the system to generate interrupt if the class driver
+ * has capability to handle the same. it is upto the class driver to ensure
+ * the proper sequencing and handling for a clean implementation. returns
+ * 0 if all goes fine, else returns failure results
+ */
+int sr_notifier_control(struct voltagedomain *voltdm, bool enable)
+{
+	struct omap_sr *sr = _sr_lookup(voltdm);
+	u32 value = 0;
+
+	if (IS_ERR(sr)) {
+		pr_warning("%s: sr corresponding to domain not found\n",
+				__func__);
+		return PTR_ERR(sr);
+	}
+	if (!sr->autocomp_active)
+		return -EINVAL;
+
+	/* If I could never register an ISR, why bother?? */
+	if (!(sr_class && sr_class->notify && sr_class->notify_flags &&
+			sr->irq)) {
+		dev_warn(&sr->pdev->dev,
+			"%s: unable to setup IRQ without handling mechanism\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	switch (sr->ip_type) {
+	case SR_TYPE_V1:
+		value = notifier_to_irqen_v1(sr_class->notify_flags);
+		sr_modify_reg(sr, ERRCONFIG_V1, value,
+				(enable) ? value : 0);
+		break;
+	case SR_TYPE_V2:
+		value = notifier_to_irqen_v2(sr_class->notify_flags);
+		sr_write_reg(sr, (enable) ? IRQENABLE_SET : IRQENABLE_CLR,
+				value);
+		break;
+	default:
+		 dev_warn(&sr->pdev->dev, "%s: unknown type of sr??\n",
+				 __func__);
+		return -EINVAL;
+	}
+
+	if (!enable)
+		sr_write_reg(sr, IRQSTATUS, value);
+
+	if (enable != sr->irq_enabled) {
+		if (enable)
+			enable_irq(sr->irq);
+		else
+			disable_irq(sr->irq);
+		sr->irq_enabled = enable;
+	}
+
+	return 0;
+}
+
+/**
  * sr_register_class() - API to register a smartreflex class parameters.
  * @class_data:	The structure containing various sr class specific data.
  *
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index da00f8c..2b0ef0e 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -251,6 +251,7 @@ void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
 /* Smartreflex driver hooks to be called from Smartreflex class driver */
 int sr_enable(struct voltagedomain *voltdm, unsigned long volt);
 void sr_disable(struct voltagedomain *voltdm);
+int sr_notifier_control(struct voltagedomain *voltdm, bool enable);
 int sr_configure_errgen(struct voltagedomain *voltdm);
 int sr_disable_errgen(struct voltagedomain *voltdm);
 int sr_configure_minmax(struct voltagedomain *voltdm);
@@ -260,6 +261,11 @@ int sr_register_class(struct omap_sr_class_data *class_data);
 #else
 static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
+static inline int sr_notifier_control(struct voltagedomain *voltdm,
+		bool enable)
+{
+	return -EINVAL;
+}
 static inline void omap_sr_disable_reset_volt(
 		struct voltagedomain *voltdm) {}
 static inline void omap_sr_register_pmic(
-- 
1.7.5.4

[PATCH 3/6] ARM: OMAP3+: SmartReflex: introduce notifier_control

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@ti.com>

We need some mechanism from class drivers to control when notifiers
should be triggered and when not, currently we have none, which makes
Class driver usage of the interrupt events almost impossible.

We also ensure that disable/enable or irq is always guarenteed to be
paired. The need to do this is because of the mixture of interrupt based
and polling based operations that is implemented as the most optimal
strategy for various SmartReflex AVS class

Introduce an SmartReflex driver API for doing the same. This is useful
for SmartReflex AVS class 1.5 or 2 drivers.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   65 +++++++++++++++++++++++++++++++++++++
 arch/arm/mach-omap2/smartreflex.h |    6 +++
 2 files changed, 71 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 7977018..dfe8075 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -45,6 +45,7 @@ struct omap_sr {
 	int				srid;
 	int				ip_type;
 	int				nvalue_count;
+	bool				irq_enabled;
 	bool				autocomp_active;
 	u32				clk_length;
 	u32				err_weight;
@@ -799,6 +800,70 @@ void sr_disable(struct voltagedomain *voltdm)
 }
 
 /**
+ * sr_notifier_control() - control the notifier mechanism
+ * @voltdm:	VDD pointer to which the SR module to be configured belongs to.
+ * @enable:	true to enable notifiers and false to disable the same
+ *
+ * SR modules allow an MCU interrupt mechanism that vary based on the IP
+ * revision, we allow the system to generate interrupt if the class driver
+ * has capability to handle the same. it is upto the class driver to ensure
+ * the proper sequencing and handling for a clean implementation. returns
+ * 0 if all goes fine, else returns failure results
+ */
+int sr_notifier_control(struct voltagedomain *voltdm, bool enable)
+{
+	struct omap_sr *sr = _sr_lookup(voltdm);
+	u32 value = 0;
+
+	if (IS_ERR(sr)) {
+		pr_warning("%s: sr corresponding to domain not found\n",
+				__func__);
+		return PTR_ERR(sr);
+	}
+	if (!sr->autocomp_active)
+		return -EINVAL;
+
+	/* If I could never register an ISR, why bother?? */
+	if (!(sr_class && sr_class->notify && sr_class->notify_flags &&
+			sr->irq)) {
+		dev_warn(&sr->pdev->dev,
+			"%s: unable to setup IRQ without handling mechanism\n",
+			__func__);
+		return -EINVAL;
+	}
+
+	switch (sr->ip_type) {
+	case SR_TYPE_V1:
+		value = notifier_to_irqen_v1(sr_class->notify_flags);
+		sr_modify_reg(sr, ERRCONFIG_V1, value,
+				(enable) ? value : 0);
+		break;
+	case SR_TYPE_V2:
+		value = notifier_to_irqen_v2(sr_class->notify_flags);
+		sr_write_reg(sr, (enable) ? IRQENABLE_SET : IRQENABLE_CLR,
+				value);
+		break;
+	default:
+		 dev_warn(&sr->pdev->dev, "%s: unknown type of sr??\n",
+				 __func__);
+		return -EINVAL;
+	}
+
+	if (!enable)
+		sr_write_reg(sr, IRQSTATUS, value);
+
+	if (enable != sr->irq_enabled) {
+		if (enable)
+			enable_irq(sr->irq);
+		else
+			disable_irq(sr->irq);
+		sr->irq_enabled = enable;
+	}
+
+	return 0;
+}
+
+/**
  * sr_register_class() - API to register a smartreflex class parameters.
  * @class_data:	The structure containing various sr class specific data.
  *
diff --git a/arch/arm/mach-omap2/smartreflex.h b/arch/arm/mach-omap2/smartreflex.h
index da00f8c..2b0ef0e 100644
--- a/arch/arm/mach-omap2/smartreflex.h
+++ b/arch/arm/mach-omap2/smartreflex.h
@@ -251,6 +251,7 @@ void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
 /* Smartreflex driver hooks to be called from Smartreflex class driver */
 int sr_enable(struct voltagedomain *voltdm, unsigned long volt);
 void sr_disable(struct voltagedomain *voltdm);
+int sr_notifier_control(struct voltagedomain *voltdm, bool enable);
 int sr_configure_errgen(struct voltagedomain *voltdm);
 int sr_disable_errgen(struct voltagedomain *voltdm);
 int sr_configure_minmax(struct voltagedomain *voltdm);
@@ -260,6 +261,11 @@ int sr_register_class(struct omap_sr_class_data *class_data);
 #else
 static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
 static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
+static inline int sr_notifier_control(struct voltagedomain *voltdm,
+		bool enable)
+{
+	return -EINVAL;
+}
 static inline void omap_sr_disable_reset_volt(
 		struct voltagedomain *voltdm) {}
 static inline void omap_sr_register_pmic(
-- 
1.7.5.4

Re: [PATCH 3/6] ARM: OMAP3+: SmartReflex: introduce notifier_control

[Menon, Nishanth]

On Tue, Mar 13, 2012 at 05:26, <jean.pihet@newoldbits.com> wrote:
>
> diff --git a/arch/arm/mach-omap2/smartreflex.c
> b/arch/arm/mach-omap2/smartreflex.c
> index 7977018..dfe8075 100644
> --- a/arch/arm/mach-omap2/smartreflex.c
> +++ b/arch/arm/mach-omap2/smartreflex.c
...
> +       switch (sr->ip_type) {
> +       case SR_TYPE_V1:
> +               value = notifier_to_irqen_v1(sr_class->notify_flags);
> +               sr_modify_reg(sr, ERRCONFIG_V1, value,
> +                               (enable) ? value : 0);
> +               break;
> +       case SR_TYPE_V2:
> +               value = notifier_to_irqen_v2(sr_class->notify_flags);
> +               sr_write_reg(sr, (enable) ? IRQENABLE_SET : IRQENABLE_CLR,
> +                               value);
> +               break;
> +       default:
> +                dev_warn(&sr->pdev->dev, "%s: unknown type of sr??\n",
> +                                __func__);
> +               return -EINVAL;
> +       }
> +
> +       if (!enable)
> +               sr_write_reg(sr, IRQSTATUS, value);

can you move this to before we disable the interrupt? it took a while,
but we caught a bug recently when we disable IRQ and then attempt to
clear the status[1]

Regards,
Nishanth Menon
[1] http://review.omapzoom.org/#/c/20231/

[PATCH 3/6] ARM: OMAP3+: SmartReflex: introduce notifier_control

[Menon, Nishanth]

On Tue, Mar 13, 2012 at 05:26, <jean.pihet@newoldbits.com> wrote:
>
> diff --git a/arch/arm/mach-omap2/smartreflex.c
> b/arch/arm/mach-omap2/smartreflex.c
> index 7977018..dfe8075 100644
> --- a/arch/arm/mach-omap2/smartreflex.c
> +++ b/arch/arm/mach-omap2/smartreflex.c
...
> + ? ? ? switch (sr->ip_type) {
> + ? ? ? case SR_TYPE_V1:
> + ? ? ? ? ? ? ? value = notifier_to_irqen_v1(sr_class->notify_flags);
> + ? ? ? ? ? ? ? sr_modify_reg(sr, ERRCONFIG_V1, value,
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (enable) ? value : 0);
> + ? ? ? ? ? ? ? break;
> + ? ? ? case SR_TYPE_V2:
> + ? ? ? ? ? ? ? value = notifier_to_irqen_v2(sr_class->notify_flags);
> + ? ? ? ? ? ? ? sr_write_reg(sr, (enable) ? IRQENABLE_SET : IRQENABLE_CLR,
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? value);
> + ? ? ? ? ? ? ? break;
> + ? ? ? default:
> + ? ? ? ? ? ? ? ?dev_warn(&sr->pdev->dev, "%s: unknown type of sr??\n",
> + ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?__func__);
> + ? ? ? ? ? ? ? return -EINVAL;
> + ? ? ? }
> +
> + ? ? ? if (!enable)
> + ? ? ? ? ? ? ? sr_write_reg(sr, IRQSTATUS, value);

can you move this to before we disable the interrupt? it took a while,
but we caught a bug recently when we disable IRQ and then attempt to
clear the status[1]

Regards,
Nishanth Menon
[1] http://review.omapzoom.org/#/c/20231/

[PATCH 4/6] ARM: OMAP3+: SmartReflex: disable spamming interrupts

[jean.pihet]

From: Nishanth Menon <nm@ti.com>

At times with bad SR configurations, especially during silicon bring-ups,
we could get continuous spurious interrupts which end up hanging the
platform in the form of an ISR call for status bits that are
automatically enabled by the hardware without any software clearing
option.

If we detect scenarios where ISR was called without the corresponding
notification bit being set, instead of hanging up the system,
we will disable interrupt after noting the event in the system log
to try and keep system sanity and allow developer to debug and fix
the condition.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index dfe8075..8a10c0a 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -223,8 +223,25 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 		return IRQ_NONE;
 	}
 
-	if (sr_class->notify)
-		sr_class->notify(sr_info->voltdm, value);
+	/* Attempt some resemblance of recovery! */
+	if (!value) {
+		dev_err(&sr_info->pdev->dev, "%s: Spurious interrupt!"
+			"status = 0x%08x. Disabling to prevent spamming!!\n",
+			__func__, status);
+		disable_irq_nosync(sr_info->irq);
+		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)) {
+			dev_err(&sr_info->pdev->dev, "%s: Callback cant handle!"
+				"status=0x%08x. Disabling to prevent spam!!\n",
+				__func__, status);
+			disable_irq_nosync(sr_info->irq);
+			sr_info->irq_enabled = false;
+		}
+
+	}
 
 	return IRQ_HANDLED;
 }
-- 
1.7.5.4

[PATCH 4/6] ARM: OMAP3+: SmartReflex: disable spamming interrupts

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@ti.com>

At times with bad SR configurations, especially during silicon bring-ups,
we could get continuous spurious interrupts which end up hanging the
platform in the form of an ISR call for status bits that are
automatically enabled by the hardware without any software clearing
option.

If we detect scenarios where ISR was called without the corresponding
notification bit being set, instead of hanging up the system,
we will disable interrupt after noting the event in the system log
to try and keep system sanity and allow developer to debug and fix
the condition.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index dfe8075..8a10c0a 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -223,8 +223,25 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 		return IRQ_NONE;
 	}
 
-	if (sr_class->notify)
-		sr_class->notify(sr_info->voltdm, value);
+	/* Attempt some resemblance of recovery! */
+	if (!value) {
+		dev_err(&sr_info->pdev->dev, "%s: Spurious interrupt!"
+			"status = 0x%08x. Disabling to prevent spamming!!\n",
+			__func__, status);
+		disable_irq_nosync(sr_info->irq);
+		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)) {
+			dev_err(&sr_info->pdev->dev, "%s: Callback cant handle!"
+				"status=0x%08x. Disabling to prevent spam!!\n",
+				__func__, status);
+			disable_irq_nosync(sr_info->irq);
+			sr_info->irq_enabled = false;
+		}
+
+	}
 
 	return IRQ_HANDLED;
 }
-- 
1.7.5.4

[PATCH 5/6] ARM: OMAP3+: SmartReflex: introduce class private data per voltage domain

[jean.pihet]

From: Nishanth Menon <nm@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

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@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 8a10c0a..c351af6 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -40,6 +40,8 @@ struct omap_sr {
 	struct platform_device		*pdev;
 	struct omap_sr_nvalue_table	*nvalue_table;
 	struct voltagedomain		*voltdm;
+	/* Managed by class driver as needed */
+	void				*voltdm_cdata;
 	struct dentry			*dbg_dir;
 	unsigned int			irq;
 	int				srid;
@@ -232,8 +234,8 @@ 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);
@@ -320,13 +322,14 @@ 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;
 }
 
@@ -340,9 +343,9 @@ 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",
@@ -763,7 +766,7 @@ 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;
 
@@ -945,7 +948,7 @@ void omap_sr_enable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->enable(voltdm);
+	sr_class->enable(voltdm, sr->voltdm_cdata);
 }
 
 /**
@@ -978,7 +981,7 @@ void omap_sr_disable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->disable(voltdm, 0);
+	sr_class->disable(voltdm, sr->voltdm_cdata, 0);
 }
 
 /**
@@ -1011,7 +1014,7 @@ 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 2b0ef0e..1fbafe7 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

[PATCH 5/6] ARM: OMAP3+: SmartReflex: introduce class private data per voltage domain

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@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

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@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 8a10c0a..c351af6 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -40,6 +40,8 @@ struct omap_sr {
 	struct platform_device		*pdev;
 	struct omap_sr_nvalue_table	*nvalue_table;
 	struct voltagedomain		*voltdm;
+	/* Managed by class driver as needed */
+	void				*voltdm_cdata;
 	struct dentry			*dbg_dir;
 	unsigned int			irq;
 	int				srid;
@@ -232,8 +234,8 @@ 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);
@@ -320,13 +322,14 @@ 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;
 }
 
@@ -340,9 +343,9 @@ 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",
@@ -763,7 +766,7 @@ 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;
 
@@ -945,7 +948,7 @@ void omap_sr_enable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->enable(voltdm);
+	sr_class->enable(voltdm, sr->voltdm_cdata);
 }
 
 /**
@@ -978,7 +981,7 @@ void omap_sr_disable(struct voltagedomain *voltdm)
 		return;
 	}
 
-	sr_class->disable(voltdm, 0);
+	sr_class->disable(voltdm, sr->voltdm_cdata, 0);
 }
 
 /**
@@ -1011,7 +1014,7 @@ 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 2b0ef0e..1fbafe7 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

[PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

[jean.pihet]

From: Nishanth Menon <nm@ti.com>

Use SmartReflex AVS Class3 initialization only for OMAP343x family of
processors.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex-class3.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex-class3.c b/arch/arm/mach-omap2/smartreflex-class3.c
index 9dcda93..735937a 100644
--- a/arch/arm/mach-omap2/smartreflex-class3.c
+++ b/arch/arm/mach-omap2/smartreflex-class3.c
@@ -11,6 +11,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <plat/cpu.h>
 #include "smartreflex.h"
 
 static int sr_class3_enable(struct voltagedomain *voltdm,
@@ -58,6 +59,10 @@ static struct omap_sr_class_data class3_data = {
 /* Smartreflex Class3 init API to be called from board file */
 static int __init sr_class3_init(void)
 {
+	/* Enable this class only for OMAP343x */
+	if (!cpu_is_omap343x())
+		return -EINVAL;
+
 	pr_info("SmartReflex Class3 initialized\n");
 	return sr_register_class(&class3_data);
 }
-- 
1.7.5.4

[PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

[jean.pihet at newoldbits.com]

From: Nishanth Menon <nm@ti.com>

Use SmartReflex AVS Class3 initialization only for OMAP343x family of
processors.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
---
 arch/arm/mach-omap2/smartreflex-class3.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/smartreflex-class3.c b/arch/arm/mach-omap2/smartreflex-class3.c
index 9dcda93..735937a 100644
--- a/arch/arm/mach-omap2/smartreflex-class3.c
+++ b/arch/arm/mach-omap2/smartreflex-class3.c
@@ -11,6 +11,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <plat/cpu.h>
 #include "smartreflex.h"
 
 static int sr_class3_enable(struct voltagedomain *voltdm,
@@ -58,6 +59,10 @@ static struct omap_sr_class_data class3_data = {
 /* Smartreflex Class3 init API to be called from board file */
 static int __init sr_class3_init(void)
 {
+	/* Enable this class only for OMAP343x */
+	if (!cpu_is_omap343x())
+		return -EINVAL;
+
 	pr_info("SmartReflex Class3 initialized\n");
 	return sr_register_class(&class3_data);
 }
-- 
1.7.5.4

RE: [PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

[Vishwanath Sripathy]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of jean.pihet@newoldbits.com
> Sent: Tuesday, March 13, 2012 3:56 PM
> To: linux-omap@vger.kernel.org; linux-arm-
> kernel@lists.infradead.org; Kevin Hilman
> Cc: Nishanth Menon; Jean Pihet
> Subject: [PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU
> to run on
>
> From: Nishanth Menon <nm@ti.com>
>
> Use SmartReflex AVS Class3 initialization only for OMAP343x family
> of
> processors.
>
> Signed-off-by: Nishanth Menon <nm@ti.com>
> Signed-off-by: Jean Pihet <j-pihet@ti.com>
> ---
>  arch/arm/mach-omap2/smartreflex-class3.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/smartreflex-class3.c
> b/arch/arm/mach-omap2/smartreflex-class3.c
> index 9dcda93..735937a 100644
> --- a/arch/arm/mach-omap2/smartreflex-class3.c
> +++ b/arch/arm/mach-omap2/smartreflex-class3.c
> @@ -11,6 +11,7 @@
>   * published by the Free Software Foundation.
>   */
>
> +#include <plat/cpu.h>
>  #include "smartreflex.h"
>
>  static int sr_class3_enable(struct voltagedomain *voltdm,
> @@ -58,6 +59,10 @@ static struct omap_sr_class_data class3_data = {
>  /* Smartreflex Class3 init API to be called from board file */
>  static int __init sr_class3_init(void)
>  {
> +	/* Enable this class only for OMAP343x */
> +	if (!cpu_is_omap343x())
> +		return -EINVAL;
Wouldn't this break SR on OMAP3630 and OMAP4? Shouldn't this be done once
you have SR1.5 support in mainline?

Vishwa
> +
>  	pr_info("SmartReflex Class3 initialized\n");
>  	return sr_register_class(&class3_data);
>  }
> --
> 1.7.5.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-
> omap" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

[PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU to run on

[Vishwanath Sripathy]

> -----Original Message-----
> From: linux-omap-owner at vger.kernel.org [mailto:linux-omap-
> owner at vger.kernel.org] On Behalf Of jean.pihet at newoldbits.com
> Sent: Tuesday, March 13, 2012 3:56 PM
> To: linux-omap at vger.kernel.org; linux-arm-
> kernel at lists.infradead.org; Kevin Hilman
> Cc: Nishanth Menon; Jean Pihet
> Subject: [PATCH 6/6] ARM: OMAP3+: SmartReflex Class3: restrict CPU
> to run on
>
> From: Nishanth Menon <nm@ti.com>
>
> Use SmartReflex AVS Class3 initialization only for OMAP343x family
> of
> processors.
>
> Signed-off-by: Nishanth Menon <nm@ti.com>
> Signed-off-by: Jean Pihet <j-pihet@ti.com>
> ---
>  arch/arm/mach-omap2/smartreflex-class3.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/smartreflex-class3.c
> b/arch/arm/mach-omap2/smartreflex-class3.c
> index 9dcda93..735937a 100644
> --- a/arch/arm/mach-omap2/smartreflex-class3.c
> +++ b/arch/arm/mach-omap2/smartreflex-class3.c
> @@ -11,6 +11,7 @@
>   * published by the Free Software Foundation.
>   */
>
> +#include <plat/cpu.h>
>  #include "smartreflex.h"
>
>  static int sr_class3_enable(struct voltagedomain *voltdm,
> @@ -58,6 +59,10 @@ static struct omap_sr_class_data class3_data = {
>  /* Smartreflex Class3 init API to be called from board file */
>  static int __init sr_class3_init(void)
>  {
> +	/* Enable this class only for OMAP343x */
> +	if (!cpu_is_omap343x())
> +		return -EINVAL;
Wouldn't this break SR on OMAP3630 and OMAP4? Shouldn't this be done once
you have SR1.5 support in mainline?

Vishwa
> +
>  	pr_info("SmartReflex Class3 initialized\n");
>  	return sr_register_class(&class3_data);
>  }
> --
> 1.7.5.4
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-
> omap" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 0/6] ARM: OMAP3+: smartreflex: add class support

[Tony Lindgren]

* jean.pihet@newoldbits.com <jean.pihet@newoldbits.com> [120313 03:29]:
> From: Jean Pihet <j-pihet@ti.com>
> 
> Add the class support so that various classes of operation can be
> implemented (class 1p5 etc.).
> 
> Based on linux-omap's master branch (3.3.0-rc6), commit
> 85244e0edd240da2004bb2ab7cbcbc67a336f20d

We need to move smartreflex into drivers before adding
anything new to it.

Tony

[PATCH 0/6] ARM: OMAP3+: smartreflex: add class support

[Tony Lindgren]

* jean.pihet at newoldbits.com <jean.pihet@newoldbits.com> [120313 03:29]:
> From: Jean Pihet <j-pihet@ti.com>
> 
> Add the class support so that various classes of operation can be
> implemented (class 1p5 etc.).
> 
> Based on linux-omap's master branch (3.3.0-rc6), commit
> 85244e0edd240da2004bb2ab7cbcbc67a336f20d

We need to move smartreflex into drivers before adding
anything new to it.

Tony