linux-kernel - [PATCH v2 4/5] drivers: pinctrl: qcom: sdm845: support GPIO wakeup from suspend

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Message-Id: <20180824200157.9993-5-ilina@codeaurora.org>
Date:   Fri, 24 Aug 2018 14:01:56 -0600
From:   Lina Iyer <ilina@...eaurora.org>
To:     marc.zyngier@....com, bjorn.andersson@...aro.org, sboyd@...nel.org,
        evgreen@...omium.org, linus.walleij@...aro.org
Cc:     rplsssn@...eaurora.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, rnayak@...eaurora.org,
        devicetree@...r.kernel.org, andy.gross@...aro.org,
        dianders@...omium.org, Lina Iyer <ilina@...eaurora.org>
Subject: [PATCH v2 4/5] drivers: pinctrl: qcom: sdm845: support GPIO wakeup from suspend

Enable TLMM IRQs to be sensed by PDC when we enter suspend. It is
possible that the TLMM may be powered off and not detect GPIOs that are
configured as wake up interrupts. By hooking into suspend callbacks, we
allow PDC IRQs to take over and wake up the system if wakeup interrupts
are triggered.

Signed-off-by: Lina Iyer <ilina@...eaurora.org>
---
 drivers/pinctrl/qcom/pinctrl-sdm845.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c
index 2ab7a8885757..cc333b8afb99 100644
--- a/drivers/pinctrl/qcom/pinctrl-sdm845.c
+++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c
@@ -1297,10 +1297,16 @@ static const struct of_device_id sdm845_pinctrl_of_match[] = {
 	{ },
 };
 
+static const struct dev_pm_ops msm_pinctrl_dev_pm_ops = {
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(msm_pinctrl_suspend_late,
+				     msm_pinctrl_resume_late)
+};
+
 static struct platform_driver sdm845_pinctrl_driver = {
 	.driver = {
 		.name = "sdm845-pinctrl",
 		.of_match_table = sdm845_pinctrl_of_match,
+		.pm = &msm_pinctrl_dev_pm_ops,
 	},
 	.probe = sdm845_pinctrl_probe,
 	.remove = msm_pinctrl_remove,
-- 
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