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>

1 files changed, 43 insertions, 19 deletions

diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
index 8312b29ab18d..791ea6a48984 100644
--- a/drivers/input/misc/bfin_rotary.c
+++ b/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;
 }