From: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
- use readw and writew to access rotary MMRs
- remap rotary register physical address into kernel space in probe
v2-changes:
- replace kzalloc with devm_kzalloc
- replace request_irq with devm_request_irq
- remove memory free and irq free from the device remove function
v3-changes:
- move managed resources to a separate patch
Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
---
drivers/input/misc/bfin_rotary.c | 53 ++++++++++++++++++++++++--------------
1 file changed, 34 insertions(+), 19 deletions(-)
diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
index dd62fc9..defddca 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;
@@ -56,14 +67,14 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
struct bfin_rot *rotary = platform_get_drvdata(pdev);
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;
@@ -76,8 +87,8 @@ 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;
}
@@ -161,17 +172,21 @@ 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);
@@ -193,8 +208,8 @@ static int bfin_rotary_remove(struct platform_device *pdev)
struct bfin_rotary_platform_data *pdata = 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, pdev);
input_unregister_device(rotary->input);
@@ -211,9 +226,9 @@ static int 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);
@@ -226,15 +241,15 @@ static int 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;
}
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
