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rockchip: refresh upstream patch

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Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org>
This commit is contained in:
CN_SZTL 2021-01-08 15:38:21 +08:00
parent 66cc0cd6c3
commit 40079b5a47
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GPG Key ID: 6850B6345C862176
1 changed files with 12 additions and 18 deletions
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30
target/linux/rockchip/patches-5.4/108-rfc-mmc-core-set-initial-signal-voltage-on-power-off.patch → target/linux/rockchip/patches-5.4/108-mmc-core-set-initial-signal-voltage-on-power-off.patch
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@ -1,6 +1,7 @@
Subject: [RFC] mmc: core: set initial signal voltage on power off
Date: Sun, 17 Feb 2019 22:14:38 +0000
Message-ID: <AM3PR03MB09664161A7FA2BD68B2800A7AC620@AM3PR03MB0966.eurprd03.prod.outlook.com>
From 0d329112c709d6cfedf0fffb19f0cc6b19043f6b Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Wed, 20 Feb 2019 07:38:34 +0000
Subject: [PATCH] mmc: core: set initial signal voltage on power off
Some boards have SD card connectors where the power rail cannot be switched
off by the driver. If the card has not been power cycled, it may still be
@ -16,26 +17,19 @@ I am sending this as a RFC because I have no insights into SD/MMC subsystem,
this change fix a re-boot issue on my boards and does not break emmc/sdio.
Is this an acceptable workaround? Any advice is appreciated.
Signed-off-by: Jonas Karlman <jonas-uIzNG4q0ceqzQB+pC5nmwQ@public.gmane.org>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
drivers/mmc/core/core.c | 8 ++++++++
1 file changed, 8 insertions(+)
drivers/mmc/core/core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1684,6 +1684,14 @@ void mmc_power_off(struct mmc_host *host)
if (host->ios.power_mode == MMC_POWER_OFF)
return;
@@ -1686,6 +1686,8 @@ void mmc_power_off(struct mmc_host *host)
mmc_pwrseq_power_off(host);
+ mmc_set_initial_signal_voltage(host);
+
+ /*
+ * This delay should be sufficient to allow the power supply
+ * to reach the minimum voltage.
+ */
+ mmc_delay(host->ios.power_delay_ms);
+
mmc_pwrseq_power_off(host);
host->ios.clock = 0;
host->ios.vdd = 0;