platform/x86: intel_mid_powerbtn: Unify PBSTATUS access

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

@@ -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,
 };