0020-mmc-core-pwrseq_simple-disable-mmc-power-on-shutdown.patch

From f6419edc62979c1e67202b5dc10abd7b22bdedcf Mon Sep 17 00:00:00 2001
From: Tobias Schramm <t.schramm@manjaro.org>
Date: Thu, 28 May 2020 14:16:52 +0200
Subject: [PATCH] mmc: core: pwrseq_simple: disable mmc power on shutdown

Fix for Broadcom SDIO WiFi modules. They misbehave if reinitialized
without a power cycle.

Signed-off-by: Tobias Schramm <t.schramm@manjaro.org>
---
 drivers/mmc/core/pwrseq_simple.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/core/pwrseq_simple.c b/drivers/mmc/core/pwrseq_simple.c
index ea4d3670560e..38fe7e29aba6 100644
--- a/drivers/mmc/core/pwrseq_simple.c
+++ b/drivers/mmc/core/pwrseq_simple.c
@@ -80,10 +80,8 @@ static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
 		msleep(pwrseq->post_power_on_delay_ms);
 }
 
-static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
+static void __mmc_pwrseq_simple_power_off(struct mmc_pwrseq_simple *pwrseq)
 {
-	struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
-
 	mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
 
 	if (pwrseq->power_off_delay_us)
@@ -96,6 +94,12 @@ static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
 	}
 }
 
+static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
+{
+	struct mmc_pwrseq_simple *pwrseq = to_pwrseq_simple(host->pwrseq);
+	__mmc_pwrseq_simple_power_off(pwrseq);
+}
+
 static const struct mmc_pwrseq_ops mmc_pwrseq_simple_ops = {
 	.pre_power_on = mmc_pwrseq_simple_pre_power_on,
 	.post_power_on = mmc_pwrseq_simple_post_power_on,
@@ -151,9 +155,18 @@ static int mmc_pwrseq_simple_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void mmc_pwrseq_simple_shutdown(struct platform_device *pdev)
+{
+	struct mmc_pwrseq_simple *pwrseq = platform_get_drvdata(pdev);
+
+	dev_info(&pdev->dev, "Turning off mmc\n");
+	__mmc_pwrseq_simple_power_off(pwrseq);
+}
+
 static struct platform_driver mmc_pwrseq_simple_driver = {
 	.probe = mmc_pwrseq_simple_probe,
 	.remove = mmc_pwrseq_simple_remove,
+	.shutdown = mmc_pwrseq_simple_shutdown,
 	.driver = {
 		.name = "pwrseq_simple",
 		.of_match_table = mmc_pwrseq_simple_of_match,
-- 
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