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Input: bfin_rotary - introduce open and close methods 

Introduce open and close methods for the input device to postpone enabling
the device until it is needed.

Acked-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dmitry Torokhov 2015-02-05 22:50:16 -08:00
parent f14d4df93a
commit c8af781ebf
1 changed files with 42 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
drivers/input/misc/bfin_rotary.c
View File

@ -34,6 +34,10 @@ struct bfin_rot {
unsigned int down_key;
unsigned int button_key;
unsigned int rel_code;
unsigned short mode;
unsigned short debounce;
unsigned short cnt_config;
unsigned short cnt_imask;
unsigned short cnt_debounce;
@ -92,6 +96,35 @@ static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
return IRQ_HANDLED;
}
static int bfin_rotary_open(struct input_dev *input)
{
struct bfin_rot *rotary = input_get_drvdata(input);
unsigned short val;
if (rotary->mode & ROT_DEBE)
writew(rotary->debounce & DPRESCALE,
rotary->base + CNT_DEBOUNCE_OFF);
writew(rotary->mode & ~CNTE, rotary->base + CNT_CONFIG_OFF);
val = UCIE | DCIE;
if (rotary->button_key)
val |= CZMIE;
writew(val, rotary->base + CNT_IMASK_OFF);
writew(rotary->mode | CNTE, rotary->base + CNT_CONFIG_OFF);
return 0;
}
static void bfin_rotary_close(struct input_dev *input)
{
struct bfin_rot *rotary = input_get_drvdata(input);
writew(0, rotary->base + CNT_CONFIG_OFF);
writew(0, rotary->base + CNT_IMASK_OFF);
}
static void bfin_rotary_free_action(void *data)
{
peripheral_free_list(data);
@ -151,6 +184,9 @@ static int bfin_rotary_probe(struct platform_device *pdev)
rotary->button_key = pdata->rotary_button_key;
rotary->rel_code = pdata->rotary_rel_code;
rotary->mode = pdata->mode;
rotary->debounce = pdata->debounce;
input->name = pdev->name;
input->phys = "bfin-rotary/input0";
input->dev.parent = &pdev->dev;
@ -162,6 +198,9 @@ static int bfin_rotary_probe(struct platform_device *pdev)
input->id.product = 0x0001;
input->id.version = 0x0100;
input->open = bfin_rotary_open;
input->close = bfin_rotary_close;
if (rotary->up_key) {
__set_bit(EV_KEY, input->evbit);
__set_bit(rotary->up_key, input->keybit);
@ -176,6 +215,9 @@ static int bfin_rotary_probe(struct platform_device *pdev)
__set_bit(rotary->button_key, input->keybit);
}
/* Quiesce the device before requesting irq */
bfin_rotary_close(input);
rotary->irq = platform_get_irq(pdev, 0);
if (rotary->irq < 0) {
dev_err(dev, "No rotary IRQ specified\n");
@ -196,39 +238,12 @@ static int bfin_rotary_probe(struct platform_device *pdev)
return error;
}
if (pdata->rotary_button_key)
writew(CZMIE, rotary->base + CNT_IMASK_OFF);
if (pdata->mode & ROT_DEBE)
writew(pdata->debounce & DPRESCALE,
rotary->base + CNT_DEBOUNCE_OFF);
if (pdata->mode)
writew(readw(rotary->base + CNT_CONFIG_OFF) |
(pdata->mode & ~CNTE),
rotary->base + CNT_CONFIG_OFF);
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;
}
static int bfin_rotary_remove(struct platform_device *pdev)
{
struct bfin_rot *rotary = platform_get_drvdata(pdev);
writew(0, rotary->base + CNT_CONFIG_OFF);
writew(0, rotary->base + CNT_IMASK_OFF);
return 0;
}
static int __maybe_unused bfin_rotary_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@ -267,7 +282,6 @@ static SIMPLE_DEV_PM_OPS(bfin_rotary_pm_ops,
static struct platform_driver bfin_rotary_device_driver = {
.probe = bfin_rotary_probe,
.remove = bfin_rotary_remove,
.driver = {
.name = "bfin-rotary",
.pm = &bfin_rotary_pm_ops,