From: Sonic Zhang <sonic.zh...@analog.com>
- 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
Signed-off-by: Sonic Zhang <sonic.zh...@analog.com>
---
arch/blackfin/mach-bf527/boards/ad7160eval.c | 5 ++
arch/blackfin/mach-bf527/boards/ezkit.c | 5 ++
arch/blackfin/mach-bf548/boards/ezkit.c | 5 ++
arch/blackfin/mach-bf609/boards/ezkit.c | 5 ++
drivers/input/misc/bfin_rotary.c | 113 +++++++++++++++-----------
5 files changed, 87 insertions(+), 46 deletions(-)
diff --git a/arch/blackfin/mach-bf527/boards/ad7160eval.c
b/arch/blackfin/mach-bf527/boards/ad7160eval.c
index 029a050..68f2a8a 100644
--- a/arch/blackfin/mach-bf527/boards/ad7160eval.c
+++ b/arch/blackfin/mach-bf527/boards/ad7160eval.c
@@ -688,6 +688,11 @@ 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,
.flags = IORESOURCE_IRQ,
diff --git a/arch/blackfin/mach-bf527/boards/ezkit.c
b/arch/blackfin/mach-bf527/boards/ezkit.c
index cc80c5b..d4219e8 100644
--- a/arch/blackfin/mach-bf527/boards/ezkit.c
+++ b/arch/blackfin/mach-bf527/boards/ezkit.c
@@ -1114,6 +1114,11 @@ 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,
.flags = IORESOURCE_IRQ,
diff --git a/arch/blackfin/mach-bf548/boards/ezkit.c
b/arch/blackfin/mach-bf548/boards/ezkit.c
index 0b68781..aaee1af 100644
--- a/arch/blackfin/mach-bf548/boards/ezkit.c
+++ b/arch/blackfin/mach-bf548/boards/ezkit.c
@@ -181,6 +181,11 @@ 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,
.flags = IORESOURCE_IRQ,
diff --git a/arch/blackfin/mach-bf609/boards/ezkit.c
b/arch/blackfin/mach-bf609/boards/ezkit.c
index 4ac72c6..57ce0a8 100644
--- a/arch/blackfin/mach-bf609/boards/ezkit.c
+++ b/arch/blackfin/mach-bf609/boards/ezkit.c
@@ -96,6 +96,11 @@ 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,
.flags = IORESOURCE_IRQ,
diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
index dd62fc9..83a69bc 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;
@@ -76,19 +87,46 @@ 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;
}
static int bfin_rotary_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct bfin_rotary_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct bfin_rot *rotary;
+ struct resource *res;
struct input_dev *input;
int error;
+ rotary = devm_kzalloc(dev, sizeof(struct bfin_rot), GFP_KERNEL);
+ if (!rotary) {
+ dev_err(dev, "fail to malloc bfin_rot\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ rotary->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(rotary->base))
+ return PTR_ERR(rotary->base);
+
+ rotary->irq = platform_get_irq(pdev, 0);
+ if (rotary->irq < 0) {
+ dev_err(dev, "No rotary IRQ specified\n");
+ return -ENOENT;
+ }
+
+ error = devm_request_irq(dev, rotary->irq, bfin_rotary_isr,
+ 0, dev_name(&pdev->dev), pdev);
+ if (error) {
+ dev_err(dev, "unable to claim irq %d; error %d\n",
+ rotary->irq, error);
+ return error;
+ }
+
/* Basic validation */
if ((pdata->rotary_up_key && !pdata->rotary_down_key) ||
(!pdata->rotary_up_key && pdata->rotary_down_key)) {
@@ -97,15 +135,14 @@ static int bfin_rotary_probe(struct platform_device *pdev)
error = peripheral_request_list(pdata->pin_list, dev_name(&pdev->dev));
if (error) {
- dev_err(&pdev->dev, "requesting peripherals failed\n");
+ dev_err(dev, "requesting peripherals failed\n");
return error;
}
- rotary = kzalloc(sizeof(struct bfin_rot), GFP_KERNEL);
input = input_allocate_device();
- if (!rotary || !input) {
+ if (!input) {
error = -ENOMEM;
- goto out1;
+ goto out;
}
rotary->input = input;
@@ -115,10 +152,6 @@ static int bfin_rotary_probe(struct platform_device *pdev)
rotary->button_key = pdata->rotary_button_key;
rotary->rel_code = pdata->rotary_rel_code;
- error = rotary->irq = platform_get_irq(pdev, 0);
- if (error < 0)
- goto out1;
-
input->name = pdev->name;
input->phys = "bfin-rotary/input0";
input->dev.parent = &pdev->dev;
@@ -144,45 +177,36 @@ static int bfin_rotary_probe(struct platform_device *pdev)
__set_bit(rotary->button_key, input->keybit);
}
- error = request_irq(rotary->irq, bfin_rotary_isr,
- 0, dev_name(&pdev->dev), pdev);
- if (error) {
- dev_err(&pdev->dev,
- "unable to claim irq %d; error %d\n",
- rotary->irq, error);
- goto out1;
- }
-
error = input_register_device(input);
if (error) {
- dev_err(&pdev->dev,
- "unable to register input device (%d)\n", error);
- goto out2;
+ dev_err(dev, "unable to register input device (%d)\n", error);
+ goto out;
}
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);
return 0;
-out2:
- free_irq(rotary->irq, pdev);
-out1:
+out:
input_free_device(input);
- kfree(rotary);
peripheral_free_list(per_cnt);
return error;
@@ -193,15 +217,12 @@ 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);
peripheral_free_list(pdata->pin_list);
- kfree(rotary);
-
return 0;
}
@@ -211,9 +232,9 @@ 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 +247,15 @@ 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
--
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