Hi Joonyoung,
On Mon, Jun 21, 2010 at 03:26:45PM +0900, Joonyoung Shim wrote:
> This patch adds support for keypad driver running on Samsung cpus. This
> driver is tested on GONI and Aquila board using S5PC110 cpu.
>
> Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Following my conversation with Thomas Gleixner reagrding "long playing"
threaded interrupt handlers I tried to convert your driver to use this
concept. The idea is to keep polling within IRQ thread context instead
of using additional work/timer structures to simplify code and ensure
race-free shutdown/unbind.
I think it was based on v4 of your driver and I'd appreciate if you could
give it a try.
Thank you.
--
Dmitry
Input: samsung-keypad - updates
From: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
arch/arm/plat-samsung/include/plat/keypad.h | 21 -
arch/arm/plat-samsung/include/plat/regs-keypad.h | 49 ---
drivers/input/keyboard/samsung-keypad.c | 334 ++++++++++++++--------
3 files changed, 215 insertions(+), 189 deletions(-)
delete mode 100644 arch/arm/plat-samsung/include/plat/regs-keypad.h
diff --git a/arch/arm/plat-samsung/include/plat/keypad.h b/arch/arm/plat-samsung/include/plat/keypad.h
index 04ba600..0a35784 100644
--- a/arch/arm/plat-samsung/include/plat/keypad.h
+++ b/arch/arm/plat-samsung/include/plat/keypad.h
@@ -34,24 +34,11 @@
*/
struct samsung_keypad_platdata {
const struct matrix_keymap_data *keymap_data;
- unsigned int rows;
- unsigned int cols;
- unsigned int rep:1;
+ unsigned int rows;
+ unsigned int cols;
+ bool rep;
- void (*cfg_gpio)(unsigned int rows, unsigned int cols);
+ void (*cfg_gpio)(unsigned int rows, unsigned int cols);
};
-/**
- * samsung_keypad_set_platdata - Set platform data for Samsung Keypad device.
- * @pd: Platform data to register to device.
- *
- * Register the given platform data for use with Samsung Keypad device.
- * The call will copy the platform data, so the board definitions can
- * make the structure itself __initdata.
- */
-extern void samsung_keypad_set_platdata(struct samsung_keypad_platdata *pd);
-
-/* defined by architecture to configure gpio. */
-extern void samsung_keypad_cfg_gpio(unsigned int rows, unsigned int cols);
-
#endif /* __PLAT_SAMSUNG_KEYPAD_H */
diff --git a/arch/arm/plat-samsung/include/plat/regs-keypad.h b/arch/arm/plat-samsung/include/plat/regs-keypad.h
deleted file mode 100644
index e4688f0..0000000
--- a/arch/arm/plat-samsung/include/plat/regs-keypad.h
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * linux/arch/arm/plat-samsung/include/plat/regs-keypad.h
- *
- * Copyright (C) 2010 Samsung Electronics Co.Ltd
- * Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-#ifndef __SAMSUNG_KEYPAD_H__
-#define __SAMSUNG_KEYPAD_H__
-
-#define SAMSUNG_KEYIFCON 0x00
-#define SAMSUNG_KEYIFSTSCLR 0x04
-#define SAMSUNG_KEYIFCOL 0x08
-#define SAMSUNG_KEYIFROW 0x0c
-#define SAMSUNG_KEYIFFC 0x10
-
-/* SAMSUNG_KEYIFCON */
-#define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0)
-#define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1)
-#define SAMSUNG_KEYIFCON_DF_EN (1 << 2)
-#define SAMSUNG_KEYIFCON_FC_EN (1 << 3)
-#define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4)
-
-/* SAMSUNG_KEYIFSTSCLR */
-#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0)
-#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8)
-#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8
-#define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0)
-#define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16)
-#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16
-
-/* SAMSUNG_KEYIFCOL */
-#define SAMSUNG_KEYIFCOL_MASK (0xff << 0)
-#define S5PV210_KEYIFCOLEN_MASK (0xff << 8)
-
-/* SAMSUNG_KEYIFROW */
-#define SAMSUNG_KEYIFROW_MASK (0xff << 0)
-#define S5PV210_KEYIFROW_MASK (0x3fff << 0)
-
-/* SAMSUNG_KEYIFFC */
-#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0)
-
-#endif /* __SAMSUNG_KEYPAD_H__ */
diff --git a/drivers/input/keyboard/samsung-keypad.c b/drivers/input/keyboard/samsung-keypad.c
index 244a3b6..c243fc5 100644
--- a/drivers/input/keyboard/samsung-keypad.c
+++ b/drivers/input/keyboard/samsung-keypad.c
@@ -1,5 +1,5 @@
/*
- * samsung-keypad.c -- Samsung keypad driver
+ * Samsung keypad driver
*
* Copyright (C) 2010 Samsung Electronics Co.Ltd
* Author: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
@@ -21,8 +21,45 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
-#include <plat/keypad.h>
-#include <plat/regs-keypad.h>
+//#include <plat/keypad.h>
+#include "/home/dtor/kernel/work/arch/arm/plat-samsung/include/plat/keypad.h"
+
+MODULE_DESCRIPTION("Samsung keypad driver");
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>");
+MODULE_AUTHOR("Donghwa Lee <dh09.lee@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
+
+#define SAMSUNG_KEYIFCON 0x00
+#define SAMSUNG_KEYIFSTSCLR 0x04
+#define SAMSUNG_KEYIFCOL 0x08
+#define SAMSUNG_KEYIFROW 0x0c
+#define SAMSUNG_KEYIFFC 0x10
+
+/* SAMSUNG_KEYIFCON */
+#define SAMSUNG_KEYIFCON_INT_F_EN (1 << 0)
+#define SAMSUNG_KEYIFCON_INT_R_EN (1 << 1)
+#define SAMSUNG_KEYIFCON_DF_EN (1 << 2)
+#define SAMSUNG_KEYIFCON_FC_EN (1 << 3)
+#define SAMSUNG_KEYIFCON_WAKEUPEN (1 << 4)
+
+/* SAMSUNG_KEYIFSTSCLR */
+#define SAMSUNG_KEYIFSTSCLR_P_INT_MASK (0xff << 0)
+#define SAMSUNG_KEYIFSTSCLR_R_INT_MASK (0xff << 8)
+#define SAMSUNG_KEYIFSTSCLR_R_INT_OFFSET 8
+#define S5PV210_KEYIFSTSCLR_P_INT_MASK (0x3fff << 0)
+#define S5PV210_KEYIFSTSCLR_R_INT_MASK (0x3fff << 16)
+#define S5PV210_KEYIFSTSCLR_R_INT_OFFSET 16
+
+/* SAMSUNG_KEYIFCOL */
+#define SAMSUNG_KEYIFCOL_MASK (0xff << 0)
+#define S5PV210_KEYIFCOLEN_MASK (0xff << 8)
+
+/* SAMSUNG_KEYIFROW */
+#define SAMSUNG_KEYIFROW_MASK (0xff << 0)
+#define S5PV210_KEYIFROW_MASK (0x3fff << 0)
+
+/* SAMSUNG_KEYIFFC */
+#define SAMSUNG_KEYIFFC_MASK (0x3ff << 0)
enum samsung_keypad_type {
KEYPAD_TYPE_SAMSUNG,
@@ -31,29 +68,28 @@ enum samsung_keypad_type {
struct samsung_keypad {
struct input_dev *input_dev;
- struct timer_list timer;
struct clk *clk;
- struct work_struct work;
void __iomem *base;
- unsigned short *keycodes;
+ wait_queue_head_t wait;
+ bool stopped;
+ int irq;
unsigned int row_shift;
unsigned int rows;
unsigned int cols;
unsigned int row_state[SAMSUNG_MAX_COLS];
- int irq;
+ unsigned short keycodes[];
};
static int samsung_keypad_is_s5pv210(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
- enum samsung_keypad_type type;
+ enum samsung_keypad_type type = platform_get_device_id(pdev)->driver_data;
- type = platform_get_device_id(pdev)->driver_data;
return type == KEYPAD_TYPE_S5PV210;
}
static void samsung_keypad_scan(struct samsung_keypad *keypad,
- unsigned int *row_state)
+ unsigned int *row_state)
{
struct device *dev = keypad->input_dev->dev.parent;
unsigned int col;
@@ -79,29 +115,15 @@ static void samsung_keypad_scan(struct samsung_keypad *keypad,
writel(0, keypad->base + SAMSUNG_KEYIFCOL);
}
-static void samsung_keypad_worker(struct work_struct *work)
+static bool samsung_keypad_report(struct samsung_keypad *keypad,
+ unsigned int *row_state)
{
- struct samsung_keypad *keypad = container_of(work,
- struct samsung_keypad, work);
- unsigned int row_state[SAMSUNG_MAX_COLS];
- unsigned int val;
+ struct input_dev *input_dev = keypad->input_dev;
unsigned int changed;
unsigned int pressed;
unsigned int key_down = 0;
- int col, row;
-
- clk_enable(keypad->clk);
-
- val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
-
- /* interrupt clear */
- writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
-
- val = readl(keypad->base + SAMSUNG_KEYIFCON);
- val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
- writel(val, keypad->base + SAMSUNG_KEYIFCON);
-
- samsung_keypad_scan(keypad, row_state);
+ unsigned int val;
+ unsigned int col, row;
for (col = 0; col < keypad->cols; col++) {
changed = row_state[col] ^ keypad->row_state[col];
@@ -121,42 +143,108 @@ static void samsung_keypad_worker(struct work_struct *work)
val = MATRIX_SCAN_CODE(row, col, keypad->row_shift);
- input_report_key(keypad->input_dev,
+ input_event(input_dev, EV_MSC, MSC_SCAN, val);
+ input_report_key(input_dev,
keypad->keycodes[val], pressed);
- input_sync(keypad->input_dev);
}
+ input_sync(keypad->input_dev);
}
+
memcpy(keypad->row_state, row_state, sizeof(row_state));
- if (key_down)
- mod_timer(&keypad->timer, jiffies + HZ / 20);
- else {
- /* enable interrupt bit */
- val = readl(keypad->base + SAMSUNG_KEYIFCON);
- val |= (SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
- writel(val, keypad->base + SAMSUNG_KEYIFCON);
- enable_irq(keypad->irq);
- }
- clk_disable(keypad->clk);
+ return key_down;
}
-static irqreturn_t samsung_keypad_interrupt(int irq, void *dev_id)
+static irqreturn_t samsung_keypad_irq(int irq, void *dev_id)
{
struct samsung_keypad *keypad = dev_id;
+ unsigned int row_state[SAMSUNG_MAX_COLS];
+ unsigned int val;
+ bool key_down;
- if (!work_pending(&keypad->work)) {
- disable_irq_nosync(keypad->irq);
- schedule_work(&keypad->work);
- }
+ do {
+ clk_enable(keypad->clk);
+
+ val = readl(keypad->base + SAMSUNG_KEYIFSTSCLR);
+ /* Clear interrupt. */
+ writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
+
+ samsung_keypad_scan(keypad, row_state);
+
+ clk_disable(keypad->clk);
+
+ key_down = samsung_keypad_report(keypad, row_state);
+ if (key_down)
+ wait_event_timeout(keypad->wait, keypad->stopped,
+ msecs_to_jiffies(50));
+
+ } while (key_down && !keypad->stopped);
return IRQ_HANDLED;
}
-static void samsung_keypad_timer(unsigned long data)
+static void samsung_keypad_start(struct samsung_keypad *keypad)
+{
+ unsigned int val;
+
+ /* Tell IRQ thread that it may poll the device. */
+ keypad->stopped = false;
+
+ clk_enable(keypad->clk);
+
+ /* Enable interrupt bits. */
+ val = readl(keypad->base + SAMSUNG_KEYIFCON);
+ val |= SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN;
+ writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+ /* KEYIFCOL reg clear. */
+ writel(0, keypad->base + SAMSUNG_KEYIFCOL);
+
+ clk_disable(keypad->clk);
+}
+
+static void samsung_keypad_stop(struct samsung_keypad *keypad)
{
- struct samsung_keypad *keypad = (struct samsung_keypad *)data;
+ unsigned int val;
+
+ /* Signal IRQ thread to stop polling and disable the handler. */
+ keypad->stopped = true;
+ wake_up(&keypad->wait);
+ disable_irq(keypad->irq);
- schedule_work(&keypad->work);
+ clk_enable(keypad->clk);
+
+ /* Clear interrupt. */
+ writel(~0x0, keypad->base + SAMSUNG_KEYIFSTSCLR);
+
+ /* Disable interrupt bits. */
+ val = readl(keypad->base + SAMSUNG_KEYIFCON);
+ val &= ~(SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN);
+ writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+ clk_disable(keypad->clk);
+
+ /*
+ * Now that chip should not generate interrupts we can safely
+ * re-enable the handler.
+ */
+ enable_irq(keypad->irq);
+}
+
+static int samsung_keypad_open(struct input_dev *input_dev)
+{
+ struct samsung_keypad *keypad = input_get_drvdata(input_dev);
+
+ samsung_keypad_start(keypad);
+
+ return 0;
+}
+
+static void samsung_keypad_close(struct input_dev *input_dev)
+{
+ struct samsung_keypad *keypad = input_get_drvdata(input_dev);
+
+ samsung_keypad_stop(keypad);
}
static int __devinit samsung_keypad_probe(struct platform_device *pdev)
@@ -166,10 +254,9 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
struct samsung_keypad *keypad;
struct resource *res;
struct input_dev *input_dev;
- unsigned short *keycodes;
unsigned int row_shift;
- unsigned int val;
- int ret;
+ unsigned int keymap_size;
+ int error;
pdata = pdev->dev.platform_data;
if (!pdata) {
@@ -183,10 +270,10 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
return -EINVAL;
}
- if (!pdata->rows || (pdata->rows > SAMSUNG_MAX_ROWS))
+ if (!pdata->rows || pdata->rows > SAMSUNG_MAX_ROWS)
return -EINVAL;
- if (!pdata->cols || (pdata->cols > SAMSUNG_MAX_COLS))
+ if (!pdata->cols || pdata->cols > SAMSUNG_MAX_COLS)
return -EINVAL;
/* initialize the gpio */
@@ -194,133 +281,144 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
pdata->cfg_gpio(pdata->rows, pdata->cols);
row_shift = get_count_order(pdata->cols);
- keypad = kzalloc(sizeof(*keypad), GFP_KERNEL);
- keycodes = kzalloc((pdata->rows << row_shift) * sizeof(*keycodes),
- GFP_KERNEL);
+ keymap_size = (pdata->rows << row_shift) * sizeof(keypad->keycodes[0]);
+
+ keypad = kzalloc(sizeof(*keypad) + keymap_size, GFP_KERNEL);
input_dev = input_allocate_device();
- if (!keypad || !keycodes || !input_dev) {
- ret = -ENOMEM;
+ if (!keypad || !input_dev) {
+ error = -ENOMEM;
goto err_free_mem;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
- ret = -ENODEV;
+ error = -ENODEV;
goto err_free_mem;
}
keypad->base = ioremap(res->start, resource_size(res));
if (!keypad->base) {
- ret = -EBUSY;
+ error = -EBUSY;
goto err_free_mem;
}
keypad->clk = clk_get(&pdev->dev, "keypad");
if (IS_ERR(keypad->clk)) {
dev_err(&pdev->dev, "failed to get keypad clk\n");
- ret = PTR_ERR(keypad->clk);
+ error = PTR_ERR(keypad->clk);
goto err_unmap_base;
}
- clk_enable(keypad->clk);
keypad->input_dev = input_dev;
- keypad->keycodes = keycodes;
keypad->row_shift = row_shift;
keypad->rows = pdata->rows;
keypad->cols = pdata->cols;
-
- INIT_WORK(&keypad->work, samsung_keypad_worker);
-
- setup_timer(&keypad->timer, samsung_keypad_timer,
- (unsigned long)keypad);
-
- /* enable interrupt and wakeup bit */
- val = SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN |
- SAMSUNG_KEYIFCON_WAKEUPEN;
- writel(val, keypad->base + SAMSUNG_KEYIFCON);
-
- /* KEYIFCOL reg clear */
- writel(0, keypad->base + SAMSUNG_KEYIFCOL);
-
- keypad->irq = platform_get_irq(pdev, 0);
- if (keypad->irq < 0) {
- ret = keypad->irq;
- goto err_disable_clk;
- }
-
- ret = request_irq(keypad->irq, samsung_keypad_interrupt, 0,
- dev_name(&pdev->dev), keypad);
-
- if (ret)
- goto err_disable_clk;
+ init_waitqueue_head(&keypad->wait);
input_dev->name = pdev->name;
input_dev->id.bustype = BUS_HOST;
input_dev->dev.parent = &pdev->dev;
+ input_set_drvdata(input_dev, keypad);
+
+ input_dev->open = samsung_keypad_open;
+ input_dev->close = samsung_keypad_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY);
if (pdata->rep)
input_dev->evbit[0] |= BIT_MASK(EV_REP);
- input_dev->keycode = keycodes;
- input_dev->keycodesize = sizeof(*keycodes);
+ input_dev->keycode = keypad->keycodes;
+ input_dev->keycodesize = sizeof(keypad->keycodes[0]);
input_dev->keycodemax = pdata->rows << row_shift;
matrix_keypad_build_keymap(keymap_data, row_shift,
input_dev->keycode, input_dev->keybit);
- ret = input_register_device(keypad->input_dev);
- if (ret)
+ keypad->irq = platform_get_irq(pdev, 0);
+ if (keypad->irq < 0) {
+ error = keypad->irq;
+ goto err_put_clk;
+ }
+
+ error = request_threaded_irq(keypad->irq, NULL, samsung_keypad_irq,
+ IRQF_ONESHOT, dev_name(&pdev->dev), keypad);
+ if (error)
+ goto err_put_clk;
+
+ error = input_register_device(keypad->input_dev);
+ if (error)
goto err_free_irq;
platform_set_drvdata(pdev, keypad);
- clk_disable(keypad->clk);
-
return 0;
err_free_irq:
free_irq(keypad->irq, keypad);
-err_disable_clk:
- clk_disable(keypad->clk);
+err_put_clk:
clk_put(keypad->clk);
err_unmap_base:
iounmap(keypad->base);
err_free_mem:
input_free_device(input_dev);
- kfree(keycodes);
kfree(keypad);
- return ret;
+ return error;
}
static int __devexit samsung_keypad_remove(struct platform_device *pdev)
{
struct samsung_keypad *keypad = platform_get_drvdata(pdev);
- free_irq(keypad->irq, keypad);
- cancel_work_sync(&keypad->work);
- del_timer_sync(&keypad->timer);
-
platform_set_drvdata(pdev, NULL);
+
input_unregister_device(keypad->input_dev);
- clk_disable(keypad->clk);
+ /*
+ * It is safe to free IRQ after unregistering device because
+ * samsung_keypad_close will shut off interrupts.
+ */
+ free_irq(keypad->irq, keypad);
+
clk_put(keypad->clk);
iounmap(keypad->base);
- kfree(keypad->keycodes);
kfree(keypad);
return 0;
}
#ifdef CONFIG_PM
+static void samsung_keypad_toggle_wakeup(struct samsung_keypad *keypad,
+ bool enable)
+{
+ unsigned int val;
+
+ clk_enable(keypad->clk);
+
+ val = readl(keypad->base + SAMSUNG_KEYIFCON);
+ if (enable)
+ val |= SAMSUNG_KEYIFCON_WAKEUPEN;
+ else
+ val &= ~SAMSUNG_KEYIFCON_WAKEUPEN;
+ writel(val, keypad->base + SAMSUNG_KEYIFCON);
+
+ clk_disable(keypad->clk);
+}
+
static int samsung_keypad_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct samsung_keypad *keypad = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = keypad->input_dev;
- disable_irq(keypad->irq);
+ mutex_lock(&input_dev->mutex);
+
+ if (input_dev->users)
+ samsung_keypad_stop(keypad);
+
+ samsung_keypad_toggle_wakeup(keypad, true);
+
+ mutex_unlock(&input_dev->mutex);
return 0;
}
@@ -329,20 +427,16 @@ static int samsung_keypad_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct samsung_keypad *keypad = platform_get_drvdata(pdev);
- unsigned int val;
+ struct input_dev *input_dev = keypad->input_dev;
- clk_enable(keypad->clk);
+ mutex_lock(&input_dev->mutex);
- /* enable interrupt and wakeup bit */
- val = SAMSUNG_KEYIFCON_INT_F_EN | SAMSUNG_KEYIFCON_INT_R_EN |
- SAMSUNG_KEYIFCON_WAKEUPEN;
- writel(val, keypad->base + SAMSUNG_KEYIFCON);
+ samsung_keypad_toggle_wakeup(keypad, false);
- /* KEYIFCOL reg clear */
- writel(0, keypad->base + SAMSUNG_KEYIFCOL);
+ if (input_dev->users)
+ samsung_keypad_start(keypad);
- enable_irq(keypad->irq);
- clk_disable(keypad->clk);
+ mutex_unlock(&input_dev->mutex);
return 0;
}
@@ -382,16 +476,10 @@ static int __init samsung_keypad_init(void)
{
return platform_driver_register(&samsung_keypad_driver);
}
+module_init(samsung_keypad_init);
static void __exit samsung_keypad_exit(void)
{
platform_driver_unregister(&samsung_keypad_driver);
}
-
-module_init(samsung_keypad_init);
module_exit(samsung_keypad_exit);
-
-MODULE_DESCRIPTION("Samsung keypad driver");
-MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>");
-MODULE_AUTHOR("Donghwa Lee <dh09.lee@xxxxxxxxxxx>");
-MODULE_LICENSE("GPL");
--
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