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Commit b6834b02 authored by Rakesh Iyer's avatar Rakesh Iyer Committed by Dmitry Torokhov
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Input: tegra-kbc - enable key interrupt for wakeup 



Enable keypress interrupt to support wakeup from low power state.

Signed-off-by: default avatarRakesh Iyer <riyer@nvidia.com>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
parent 82f6aba8

drivers/input/keyboard/tegra-kbc.c

+17 −0
Original line number Diff line number Diff line
@@ -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);