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Input: spear-keyboard - fix for balancing the enable_irq_wake 

This patch handles the fix for unbalanced irq for the cases when
enable_irq_wake fails, and a warning related to same is displayed
on the console. The workaround is handled at the driver level.

Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Deepak Sikri 2012-11-08 16:35:27 -08:00 committed by Dmitry Torokhov
parent d852f95973
commit 1eee4af30e
1 changed files with 8 additions and 3 deletions
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11
drivers/input/keyboard/spear-keyboard.c
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@ -60,10 +60,11 @@ struct spear_kbd {
struct clk *clk;
unsigned int irq;
unsigned int mode;
unsigned int suspended_rate;
unsigned short last_key;
unsigned short keycodes[NUM_ROWS * NUM_COLS];
bool rep;
unsigned int suspended_rate;
bool irq_wake_enabled;
u32 mode_ctl_reg;
};
@ -333,7 +334,8 @@ static int spear_kbd_suspend(struct device *dev)
mode_ctl_reg = readl_relaxed(kbd->io_base + MODE_CTL_REG);
if (device_may_wakeup(&pdev->dev)) {
enable_irq_wake(kbd->irq);
if (!enable_irq_wake(kbd->irq))
kbd->irq_wake_enabled = true;
/*
* reprogram the keyboard operating frequency as on some
@ -379,7 +381,10 @@ static int spear_kbd_resume(struct device *dev)
mutex_lock(&input_dev->mutex);
if (device_may_wakeup(&pdev->dev)) {
disable_irq_wake(kbd->irq);
if (kbd->irq_wake_enabled) {
kbd->irq_wake_enabled = false;
disable_irq_wake(kbd->irq);
}
} else {
if (input_dev->users)
clk_enable(kbd->clk);