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