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Input: tegra-kbc - enable key interrupt for wakeup

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Enable keypress interrupt to support wakeup from low power state.

Signed-off-by: Rakesh Iyer <riyer@nvidia.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Rakesh Iyer 2012-01-22 23:27:54 -08:00 committed by Dmitry Torokhov
parent 82f6aba8ea
commit b6834b02e4
1 changed files with 17 additions and 0 deletions
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17
drivers/input/keyboard/tegra-kbc.c
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@ -48,6 +48,7 @@
#define KBC_FIFO_TH_CNT_SHIFT(cnt) (cnt << 14)
#define KBC_DEBOUNCE_CNT_SHIFT(cnt) (cnt << 4)
#define KBC_CONTROL_FIFO_CNT_INT_EN (1 << 3)
#define KBC_CONTROL_KEYPRESS_INT_EN (1 << 1)
#define KBC_CONTROL_KBC_EN (1 << 0)
/* KBC Interrupt Register */
@ -356,6 +357,18 @@ static void tegra_kbc_set_fifo_interrupt(struct tegra_kbc *kbc, bool enable)
writel(val, kbc->mmio + KBC_CONTROL_0);
}
static void tegra_kbc_set_keypress_interrupt(struct tegra_kbc *kbc, bool enable)
{
u32 val;
val = readl(kbc->mmio + KBC_CONTROL_0);
if (enable)
val |= KBC_CONTROL_KEYPRESS_INT_EN;
else
val &= ~KBC_CONTROL_KEYPRESS_INT_EN;
writel(val, kbc->mmio + KBC_CONTROL_0);
}
static void tegra_kbc_keypress_timer(unsigned long data)
{
struct tegra_kbc *kbc = (struct tegra_kbc *)data;
@ -831,6 +844,8 @@ static int tegra_kbc_suspend(struct device *dev)
msleep(30);
kbc->keypress_caused_wake = false;
/* Enable keypress interrupt before going into suspend. */
tegra_kbc_set_keypress_interrupt(kbc, true);
enable_irq(kbc->irq);
enable_irq_wake(kbc->irq);
} else {
@ -852,6 +867,8 @@ static int tegra_kbc_resume(struct device *dev)
if (device_may_wakeup(&pdev->dev)) {
disable_irq_wake(kbc->irq);
tegra_kbc_setup_wakekeys(kbc, false);
/* We will use fifo interrupts for key detection. */
tegra_kbc_set_keypress_interrupt(kbc, false);
/* Restore the resident time of continuous polling mode. */
writel(kbc->cp_to_wkup_dly, kbc->mmio + KBC_TO_CNT_0);