[PATCH v1 0/3] platform/x86: intel_mid_powerbtn: Unify workflow

[PATCH v1 0/3] platform/x86: intel_mid_powerbtn: Unify workflow

[Andy Shevchenko]

Currently there is a mess with PBSTATUS accessors between different
Intel MID platforms. Here is the set to fix it and make driver
eventually neat and almost clean.

Andy Shevchenko (3):
  platform/x86: intel_mid_powerbtn: Unify PBSTATUS access
  platform/x86: intel_mid_powerbtn: Move comment to where it belongs
  platform/x86: intel_mid_powerbtn: Unify IRQ acknowledegment

 drivers/platform/x86/intel_mid_powerbtn.c | 80 ++++++++++++-------------------
 1 file changed, 30 insertions(+), 50 deletions(-)

-- 
2.11.0

[PATCH v1 1/3] platform/x86: intel_mid_powerbtn: Unify PBSTATUS access

[Andy Shevchenko]

The status register on Intel Merrifield can be read in the similar way
it's done for previous MID platforms. Unify access to PBSTATUS register
via SCU IPC.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/intel_mid_powerbtn.c | 41 ++++++++++---------------------
 1 file changed, 13 insertions(+), 28 deletions(-)

diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c
index 1d30b3549748..594d503ca6fe 100644
--- a/drivers/platform/x86/intel_mid_powerbtn.c
+++ b/drivers/platform/x86/intel_mid_powerbtn.c
@@ -40,37 +40,37 @@
 #define MSIC_PWRBTNM    (1 << 0)
 
 /* Intel Tangier */
-#define MRFLD_PBSTAT_ADDR	0xfffff61a
-#define MRFLD_PB_LEVEL		(1 << 4)	/* 1 - release, 0 - press */
+#define BCOVE_PB_LEVEL		(1 << 4)	/* 1 - release, 0 - press */
 
 /* Basin Cove PMIC */
 #define BCOVE_PBIRQ		0x02
 #define BCOVE_IRQLVL1MSK	0x0c
 #define BCOVE_PBIRQMASK		0x0d
+#define BCOVE_PBSTATUS		0x27
 
 struct mid_pb_ddata {
 	struct device *dev;
-	void __iomem *reg;
 	int irq;
 	struct input_dev *input;
-	int (*pbstat)(struct mid_pb_ddata *ddata, int *value);
+	unsigned short pbstat_addr;
+	u8 pbstat_mask;
 	int (*ack)(struct mid_pb_ddata *ddata);
 	int (*setup)(struct mid_pb_ddata *ddata);
 };
 
-static int mfld_pbstat(struct mid_pb_ddata *ddata, int *value)
+static int mid_pbstat(struct mid_pb_ddata *ddata, int *value)
 {
 	struct input_dev *input = ddata->input;
 	int ret;
 	u8 pbstat;
 
-	ret = intel_msic_reg_read(INTEL_MSIC_PBSTATUS, &pbstat);
+	ret = intel_msic_reg_read(ddata->pbstat_addr, &pbstat);
 	if (ret)
 		return ret;
 
 	dev_dbg(input->dev.parent, "PB_INT status= %d\n", pbstat);
 
-	*value = !(pbstat & MSIC_PB_LEVEL);
+	*value = !(pbstat & ddata->pbstat_mask);
 	return 0;
 }
 
@@ -89,19 +89,6 @@ static int mfld_ack(struct mid_pb_ddata *ddata)
 	return intel_msic_reg_update(INTEL_MSIC_IRQLVL1MSK, 0, MSIC_PWRBTNM);
 }
 
-static int mrfld_pbstat(struct mid_pb_ddata *ddata, int *value)
-{
-	struct input_dev *input = ddata->input;
-	u8 pbstat;
-
-	pbstat = readb(ddata->reg);
-
-	dev_dbg(input->dev.parent, "PB_INT status= %d\n", pbstat);
-
-	*value = !(pbstat & MRFLD_PB_LEVEL);
-	return 0;
-}
-
 static int mrfld_ack(struct mid_pb_ddata *ddata)
 {
 	return intel_scu_ipc_update_register(BCOVE_IRQLVL1MSK, 0, MSIC_PWRBTNM);
@@ -109,10 +96,6 @@ static int mrfld_ack(struct mid_pb_ddata *ddata)
 
 static int mrfld_setup(struct mid_pb_ddata *ddata)
 {
-	ddata->reg = devm_ioremap_nocache(ddata->dev, MRFLD_PBSTAT_ADDR, 1);
-	if (!ddata->reg)
-		return -ENOMEM;
-
 	/* Unmask the PBIRQ and MPBIRQ on Tangier */
 	intel_scu_ipc_update_register(BCOVE_PBIRQ, 0, MSIC_PWRBTNM);
 	intel_scu_ipc_update_register(BCOVE_PBIRQMASK, 0, MSIC_PWRBTNM);
@@ -124,10 +107,10 @@ static irqreturn_t mid_pb_isr(int irq, void *dev_id)
 {
 	struct mid_pb_ddata *ddata = dev_id;
 	struct input_dev *input = ddata->input;
-	int value;
+	int value = 0;
 	int ret;
 
-	ret = ddata->pbstat(ddata, &value);
+	ret = mid_pbstat(ddata, &value);
 	if (ret < 0) {
 		dev_err(input->dev.parent,
 			"Read error %d while reading MSIC_PB_STATUS\n", ret);
@@ -141,12 +124,14 @@ static irqreturn_t mid_pb_isr(int irq, void *dev_id)
 }
 
 static struct mid_pb_ddata mfld_ddata = {
-	.pbstat	= mfld_pbstat,
+	.pbstat_addr	= INTEL_MSIC_PBSTATUS,
+	.pbstat_mask	= MSIC_PB_LEVEL,
 	.ack	= mfld_ack,
 };
 
 static struct mid_pb_ddata mrfld_ddata = {
-	.pbstat	= mrfld_pbstat,
+	.pbstat_addr	= BCOVE_PBSTATUS,
+	.pbstat_mask	= BCOVE_PB_LEVEL,
 	.ack	= mrfld_ack,
 	.setup	= mrfld_setup,
 };
-- 
2.11.0

[PATCH v1 2/3] platform/x86: intel_mid_powerbtn: Move comment to where it belongs

[Andy Shevchenko]

The comments is about initial interrupt acknowledgment only. So, move it
back to where it belongs.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/intel_mid_powerbtn.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c
index 594d503ca6fe..de40c71883f8 100644
--- a/drivers/platform/x86/intel_mid_powerbtn.c
+++ b/drivers/platform/x86/intel_mid_powerbtn.c
@@ -76,16 +76,6 @@ static int mid_pbstat(struct mid_pb_ddata *ddata, int *value)
 
 static int mfld_ack(struct mid_pb_ddata *ddata)
 {
-	/*
-	 * SCU firmware might send power button interrupts to IA core before
-	 * kernel boots and doesn't get EOI from IA core. The first bit of
-	 * MSIC reg 0x21 is kept masked, and SCU firmware doesn't send new
-	 * power interrupt to Android kernel. Unmask the bit when probing
-	 * power button in kernel.
-	 * There is a very narrow race between irq handler and power button
-	 * initialization. The race happens rarely. So we needn't worry
-	 * about it.
-	 */
 	return intel_msic_reg_update(INTEL_MSIC_IRQLVL1MSK, 0, MSIC_PWRBTNM);
 }
 
@@ -202,6 +192,16 @@ static int mid_pb_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ddata);
 
+	/*
+	 * SCU firmware might send power button interrupts to IA core before
+	 * kernel boots and doesn't get EOI from IA core. The first bit of
+	 * MSIC reg 0x21 is kept masked, and SCU firmware doesn't send new
+	 * power interrupt to Android kernel. Unmask the bit when probing
+	 * power button in kernel.
+	 * There is a very narrow race between irq handler and power button
+	 * initialization. The race happens rarely. So we needn't worry
+	 * about it.
+	 */
 	error = ddata->ack(ddata);
 	if (error) {
 		dev_err(&pdev->dev,
-- 
2.11.0

[PATCH v1 3/3] platform/x86: intel_mid_powerbtn: Unify IRQ acknowledegment

[Andy Shevchenko]

The IRQ on Intel Merrifield can be acknowledged in the similar way it's
done for previous MID platforms. Unify acknowledgement via SCU IPC.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/platform/x86/intel_mid_powerbtn.c | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/platform/x86/intel_mid_powerbtn.c b/drivers/platform/x86/intel_mid_powerbtn.c
index de40c71883f8..38844f765345 100644
--- a/drivers/platform/x86/intel_mid_powerbtn.c
+++ b/drivers/platform/x86/intel_mid_powerbtn.c
@@ -52,9 +52,9 @@ struct mid_pb_ddata {
 	struct device *dev;
 	int irq;
 	struct input_dev *input;
+	unsigned short mirqlvl1_addr;
 	unsigned short pbstat_addr;
 	u8 pbstat_mask;
-	int (*ack)(struct mid_pb_ddata *ddata);
 	int (*setup)(struct mid_pb_ddata *ddata);
 };
 
@@ -74,14 +74,9 @@ static int mid_pbstat(struct mid_pb_ddata *ddata, int *value)
 	return 0;
 }
 
-static int mfld_ack(struct mid_pb_ddata *ddata)
+static int mid_irq_ack(struct mid_pb_ddata *ddata)
 {
-	return intel_msic_reg_update(INTEL_MSIC_IRQLVL1MSK, 0, MSIC_PWRBTNM);
-}
-
-static int mrfld_ack(struct mid_pb_ddata *ddata)
-{
-	return intel_scu_ipc_update_register(BCOVE_IRQLVL1MSK, 0, MSIC_PWRBTNM);
+	return intel_msic_reg_update(ddata->mirqlvl1_addr, 0, MSIC_PWRBTNM);
 }
 
 static int mrfld_setup(struct mid_pb_ddata *ddata)
@@ -109,20 +104,20 @@ static irqreturn_t mid_pb_isr(int irq, void *dev_id)
 		input_sync(input);
 	}
 
-	ddata->ack(ddata);
+	mid_irq_ack(ddata);
 	return IRQ_HANDLED;
 }
 
 static struct mid_pb_ddata mfld_ddata = {
+	.mirqlvl1_addr	= INTEL_MSIC_IRQLVL1MSK,
 	.pbstat_addr	= INTEL_MSIC_PBSTATUS,
 	.pbstat_mask	= MSIC_PB_LEVEL,
-	.ack	= mfld_ack,
 };
 
 static struct mid_pb_ddata mrfld_ddata = {
+	.mirqlvl1_addr	= BCOVE_IRQLVL1MSK,
 	.pbstat_addr	= BCOVE_PBSTATUS,
 	.pbstat_mask	= BCOVE_PB_LEVEL,
-	.ack	= mrfld_ack,
 	.setup	= mrfld_setup,
 };
 
@@ -202,7 +197,7 @@ static int mid_pb_probe(struct platform_device *pdev)
 	 * initialization. The race happens rarely. So we needn't worry
 	 * about it.
 	 */
-	error = ddata->ack(ddata);
+	error = mid_irq_ack(ddata);
 	if (error) {
 		dev_err(&pdev->dev,
 			"Unable to clear power button interrupt, error: %d\n",
-- 
2.11.0