linux-kernel - [PATCH 5.4 77/78] i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP

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Message-Id: <20210608175937.863047645@linuxfoundation.org>
Date:   Tue,  8 Jun 2021 20:27:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roja Rani Yarubandi <rojay@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Wolfram Sang <wsa@...nel.org>
Subject: [PATCH 5.4 77/78] i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops

From: Roja Rani Yarubandi <rojay@...eaurora.org>

commit 57648e860485de39c800a89f849fdd03c2d31d15 upstream.

Mark bus as suspended during system suspend to block the future
transfers. Implement geni_i2c_resume_noirq() to resume the bus.

Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller")
Signed-off-by: Roja Rani Yarubandi <rojay@...eaurora.org>
Reviewed-by: Stephen Boyd <swboyd@...omium.org>
Signed-off-by: Wolfram Sang <wsa@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -685,6 +685,8 @@ static int __maybe_unused geni_i2c_suspe
 {
 	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
 
+	i2c_mark_adapter_suspended(&gi2c->adap);
+
 	if (!gi2c->suspended) {
 		geni_i2c_runtime_suspend(dev);
 		pm_runtime_disable(dev);
@@ -694,8 +696,16 @@ static int __maybe_unused geni_i2c_suspe
 	return 0;
 }
 
+static int __maybe_unused geni_i2c_resume_noirq(struct device *dev)
+{
+	struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
+
+	i2c_mark_adapter_resumed(&gi2c->adap);
+	return 0;
+}
+
 static const struct dev_pm_ops geni_i2c_pm_ops = {
-	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, NULL)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, geni_i2c_resume_noirq)
 	SET_RUNTIME_PM_OPS(geni_i2c_runtime_suspend, geni_i2c_runtime_resume,
 									NULL)
 };