39 lines
1.0 KiB
Diff
39 lines
1.0 KiB
Diff
From f4739b16953473a51af17bdb1a6ad8240e996f9b Mon Sep 17 00:00:00 2001
|
|
From: Ondrej Jirman <megous@megous.com>
|
|
Date: Fri, 16 Mar 2018 20:31:55 +0100
|
|
Subject: [PATCH 142/478] mmc: add delay after power class selection
|
|
|
|
This seems to fix issue with sporadic ETIMEOUT in eMMC cache
|
|
initialization on second generation TBS A711 tablet.
|
|
|
|
Signed-off-by: Ondrej Jirman <megous@megous.com>
|
|
---
|
|
drivers/mmc/core/mmc.c | 4 ++++
|
|
1 file changed, 4 insertions(+)
|
|
|
|
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
|
|
index 29e58ffae379..82d58d9ecf17 100644
|
|
--- a/drivers/mmc/core/mmc.c
|
|
+++ b/drivers/mmc/core/mmc.c
|
|
@@ -1798,6 +1798,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
|
*/
|
|
mmc_select_powerclass(card);
|
|
|
|
+ msleep(20);
|
|
+
|
|
/*
|
|
* Enable HPI feature (if supported)
|
|
*/
|
|
@@ -1816,6 +1818,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
|
|
}
|
|
}
|
|
|
|
+ msleep(20);
|
|
+
|
|
/*
|
|
* If cache size is higher than 0, this indicates the existence of cache
|
|
* and it can be turned on. Note that some eMMCs from Micron has been
|
|
--
|
|
2.35.3
|
|
|