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Message-ID: <20150206065603.GA40057@dtor-ws>
Date: Thu, 5 Feb 2015 22:56:03 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Sonic Zhang <sonic.zhang@...log.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFT/PATCH] 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.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
Hi Sonic,
Could you please tell me if the driver still works with this parch?
Thanks!
drivers/input/misc/bfin_rotary.c | 70 ++++++++++++++++++++++++----------------
1 file changed, 42 insertions(+), 28 deletions(-)
diff --git a/drivers/input/misc/bfin_rotary.c b/drivers/input/misc/bfin_rotary.c
index 09d7612..1bc9409 100644
--- a/drivers/input/misc/bfin_rotary.c
+++ b/drivers/input/misc/bfin_rotary.c
@@ -35,6 +35,10 @@ 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;
@@ -94,6 +98,35 @@ 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);
@@ -154,6 +187,9 @@ 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;
@@ -165,6 +201,9 @@ 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);
@@ -179,6 +218,9 @@ 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");
@@ -199,39 +241,12 @@ 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);
@@ -270,7 +285,6 @@ 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,
--
2.2.0.rc0.207.ga3a616c
--
Dmitry
--
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