From 991d5b4eda2b223f64b3bc17129cd4660398a2f3 Mon Sep 17 00:00:00 2001
From: Shawn Guo <shawn.guo@linaro.org>
Date: Mon, 9 Sep 2019 10:57:12 +0800
Subject: [PATCH] mmc: pwrseq_simple: select pinctrl state during
 suspend/resume

To support suspend/resume from LPSR mode, we need to select default
pinctrl state in resume, so that IOMUXC settings can be restored from
power losing.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/mmc/core/pwrseq_simple.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index ea4d3670560e..9565f6400620 100644
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/gpio/consumer.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/delay.h>
 #include <linux/property.h>
 
@@ -151,12 +152,30 @@ static int mmc_pwrseq_simple_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static int mmc_pwrseq_simple_suspend(struct device *dev)
+{
+	pinctrl_pm_select_sleep_state(dev);
+
+	return 0;
+}
+
+static int mmc_pwrseq_simple_resume(struct device *dev)
+{
+	pinctrl_pm_select_default_state(dev);
+
+	return 0;
+}
+
+SIMPLE_DEV_PM_OPS(mmc_pwrseq_simple_pm_ops, mmc_pwrseq_simple_suspend,
+					    mmc_pwrseq_simple_resume);
+
 static struct platform_driver mmc_pwrseq_simple_driver = {
 	.probe = mmc_pwrseq_simple_probe,
 	.remove = mmc_pwrseq_simple_remove,
 	.driver = {
 		.name = "pwrseq_simple",
 		.of_match_table = mmc_pwrseq_simple_of_match,
+		.pm = &mmc_pwrseq_simple_pm_ops,
 	},
 };