Input: bfin_rotary - use generic IO functions

Instead of using arch-specific accessors remap rotary register physical
address into kernel space in probe and use standard readw and writew to
access rotary MMRs.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

arch/blackfin/mach-bf527/boards/ad7160eval.c

@@ -687,6 +687,11 @@ static struct bfin_rotary_platform_data bfin_rotary_data = {
 };
 
 static struct resource bfin_rotary_resources[] = {
+	{
+		.start = CNT_CONFIG,
+		.end   = CNT_CONFIG + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
 	{
 		.start = IRQ_CNT,
 		.end = IRQ_CNT,

arch/blackfin/mach-bf527/boards/ezkit.c

@@ -1113,6 +1113,11 @@ static struct bfin_rotary_platform_data bfin_rotary_data = {
 };
 
 static struct resource bfin_rotary_resources[] = {
+	{
+		.start = CNT_CONFIG,
+		.end   = CNT_CONFIG + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
 	{
 		.start = IRQ_CNT,
 		.end = IRQ_CNT,

arch/blackfin/mach-bf548/boards/ezkit.c

@@ -172,6 +172,11 @@ static struct bfin_rotary_platform_data bfin_rotary_data = {
 };
 
 static struct resource bfin_rotary_resources[] = {
+	{
+		.start = CNT_CONFIG,
+		.end   = CNT_CONFIG + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
 	{
 		.start = IRQ_CNT,
 		.end = IRQ_CNT,

arch/blackfin/mach-bf609/boards/ezkit.c

@@ -87,6 +87,11 @@ static struct bfin_rotary_platform_data bfin_rotary_data = {
 };
 
 static struct resource bfin_rotary_resources[] = {
+	{
+		.start = CNT_CONFIG,
+		.end   = CNT_CONFIG + 0xff,
+		.flags = IORESOURCE_MEM,
+	},
 	{
 		.start = IRQ_CNT,
 		.end = IRQ_CNT,

drivers/input/misc/bfin_rotary.c

@@ -7,6 +7,7 @@
 
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/pm.h>
 #include <linux/platform_device.h>
@@ -16,8 +17,18 @@
 
 #include <asm/portmux.h>
 
+#define CNT_CONFIG_OFF		0	/* CNT Config Offset */
+#define CNT_IMASK_OFF		4	/* CNT Interrupt Mask Offset */
+#define CNT_STATUS_OFF		8	/* CNT Status Offset */
+#define CNT_COMMAND_OFF		12	/* CNT Command Offset */
+#define CNT_DEBOUNCE_OFF	16	/* CNT Debounce Offset */
+#define CNT_COUNTER_OFF		20	/* CNT Counter Offset */
+#define CNT_MAX_OFF		24	/* CNT Maximum Count Offset */
+#define CNT_MIN_OFF		28	/* CNT Minimum Count Offset */
+
 struct bfin_rot {
 	struct input_dev *input;
+	void __iomem *base;
 	int irq;
 	unsigned int up_key;
 	unsigned int down_key;
@@ -55,14 +66,14 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
 	struct bfin_rot *rotary = dev_id;
 	int delta;
 
-	switch (bfin_read_CNT_STATUS()) {
+	switch (readw(rotary->base + CNT_STATUS_OFF)) {
 
 	case ICII:
 		break;
 
 	case UCII:
 	case DCII:
-		delta = bfin_read_CNT_COUNTER();
+		delta = readl(rotary->base + CNT_COUNTER_OFF);
 		if (delta)
 			report_rotary_event(rotary, delta);
 		break;
@@ -75,8 +86,8 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
 		break;
 	}
 
-	bfin_write_CNT_COMMAND(W1LCNT_ZERO);	/* Clear COUNTER */
-	bfin_write_CNT_STATUS(-1);	/* Clear STATUS */
+	writew(W1LCNT_ZERO, rotary->base + CNT_COMMAND_OFF); /* Clear COUNTER */
+	writew(-1, rotary->base + CNT_STATUS_OFF); /* Clear STATUS */
 
 	return IRQ_HANDLED;
 }
@@ -85,7 +96,9 @@ static int bfin_rotary_probe(struct platform_device *pdev)
 {
 	const struct bfin_rotary_platform_data *pdata =
 					dev_get_platdata(&pdev->dev);
+	struct device *dev = &pdev->dev;
 	struct bfin_rot *rotary;
+	struct resource *res;
 	struct input_dev *input;
 	int error;
 
@@ -111,6 +124,13 @@ static int bfin_rotary_probe(struct platform_device *pdev)
 		goto out1;
 	}
 
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	rotary->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(rotary->base)) {
+		error = PTR_ERR(rotary->base);
+		goto out1;
+	}
+
 	rotary->input = input;
 
 	rotary->up_key = pdata->rotary_up_key;
@@ -164,17 +184,21 @@ static int bfin_rotary_probe(struct platform_device *pdev)
 	}
 
 	if (pdata->rotary_button_key)
-		bfin_write_CNT_IMASK(CZMIE);
+		writew(CZMIE, rotary->base + CNT_IMASK_OFF);
 
 	if (pdata->mode & ROT_DEBE)
-		bfin_write_CNT_DEBOUNCE(pdata->debounce & DPRESCALE);
+		writew(pdata->debounce & DPRESCALE,
+			rotary->base + CNT_DEBOUNCE_OFF);
 
 	if (pdata->mode)
-		bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() |
-					(pdata->mode & ~CNTE));
+		writew(readw(rotary->base + CNT_CONFIG_OFF) |
+			(pdata->mode & ~CNTE),
+			rotary->base + CNT_CONFIG_OFF);
 
-	bfin_write_CNT_IMASK(bfin_read_CNT_IMASK() | UCIE | DCIE);
-	bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() | CNTE);
+	writew(readw(rotary->base + CNT_IMASK_OFF) | UCIE | DCIE,
+		rotary->base + CNT_IMASK_OFF);
+	writew(readw(rotary->base + CNT_CONFIG_OFF) | CNTE,
+		rotary->base + CNT_CONFIG_OFF);
 
 	platform_set_drvdata(pdev, rotary);
 	device_init_wakeup(&pdev->dev, 1);
@@ -198,8 +222,8 @@ static int bfin_rotary_remove(struct platform_device *pdev)
 					dev_get_platdata(&pdev->dev);
 	struct bfin_rot *rotary = platform_get_drvdata(pdev);
 
-	bfin_write_CNT_CONFIG(0);
-	bfin_write_CNT_IMASK(0);
+	writew(0, rotary->base + CNT_CONFIG_OFF);
+	writew(0, rotary->base + CNT_IMASK_OFF);
 
 	free_irq(rotary->irq, rotary);
 	input_unregister_device(rotary->input);
@@ -217,9 +241,9 @@ static int __maybe_unused bfin_rotary_suspend(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct bfin_rot *rotary = platform_get_drvdata(pdev);
 
-	rotary->cnt_config = bfin_read_CNT_CONFIG();
-	rotary->cnt_imask = bfin_read_CNT_IMASK();
-	rotary->cnt_debounce = bfin_read_CNT_DEBOUNCE();
+	rotary->cnt_config = readw(rotary->base + CNT_CONFIG_OFF);
+	rotary->cnt_imask = readw(rotary->base + CNT_IMASK_OFF);
+	rotary->cnt_debounce = readw(rotary->base + CNT_DEBOUNCE_OFF);
 
 	if (device_may_wakeup(&pdev->dev))
 		enable_irq_wake(rotary->irq);
@@ -232,15 +256,15 @@ static int __maybe_unused bfin_rotary_resume(struct device *dev)
 	struct platform_device *pdev = to_platform_device(dev);
 	struct bfin_rot *rotary = platform_get_drvdata(pdev);
 
-	bfin_write_CNT_DEBOUNCE(rotary->cnt_debounce);
-	bfin_write_CNT_IMASK(rotary->cnt_imask);
-	bfin_write_CNT_CONFIG(rotary->cnt_config & ~CNTE);
+	writew(rotary->cnt_debounce, rotary->base + CNT_DEBOUNCE_OFF);
+	writew(rotary->cnt_imask, rotary->base + CNT_IMASK_OFF);
+	writew(rotary->cnt_config & ~CNTE, rotary->base + CNT_CONFIG_OFF);
 
 	if (device_may_wakeup(&pdev->dev))
 		disable_irq_wake(rotary->irq);
 
 	if (rotary->cnt_config & CNTE)
-		bfin_write_CNT_CONFIG(rotary->cnt_config);
+		writew(rotary->cnt_config, rotary->base + CNT_CONFIG_OFF);
 
 	return 0;
 }