From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Haibo Chen <haibo.chen@nxp.com>,
Dong Aisheng <aisheng.dong@nxp.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [PATCH 4.9 12/21] mmc: sdhci-esdhc-imx: increase the pad I/O drive strength for DDR50 card
Date: Tue, 25 Apr 2017 16:09:07 +0100 [thread overview]
Message-ID: <20170425150827.961390522@linuxfoundation.org> (raw)
In-Reply-To: <20170425150827.381333941@linuxfoundation.org>
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Haibo Chen <haibo.chen@nxp.com>
commit 9f327845358d3dd0d8a5a7a5436b0aa5c432e757 upstream.
Currently for DDR50 card, it need tuning in default. We meet tuning fail
issue for DDR50 card and some data CRC error when DDR50 sd card works.
This is because the default pad I/O drive strength can't make sure DDR50
card work stable. So increase the pad I/O drive strength for DDR50 card,
and use pins_100mhz.
This fixes DDR50 card support for IMX since DDR50 tuning was enabled from
commit 9faac7b95ea4 ("mmc: sdhci: enable tuning for DDR50")
Tested-and-reported-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -830,6 +830,7 @@ static int esdhc_change_pinstate(struct
switch (uhs) {
case MMC_TIMING_UHS_SDR50:
+ case MMC_TIMING_UHS_DDR50:
pinctrl = imx_data->pins_100mhz;
break;
case MMC_TIMING_UHS_SDR104:
next prev parent reply other threads:[~2017-04-25 15:12 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 15:08 [PATCH 4.9 00/21] 4.9.25-stable review Greg Kroah-Hartman
2017-04-25 15:08 ` [PATCH 4.9 01/21] KEYS: Disallow keyrings beginning with . to be joined as session keyrings Greg Kroah-Hartman
2017-04-25 15:08 ` [PATCH 4.9 02/21] KEYS: Change the name of the dead type to ".dead" to prevent user access Greg Kroah-Hartman
2017-04-25 15:08 ` [PATCH 4.9 03/21] KEYS: fix keyctl_set_reqkey_keyring() to not leak thread keyrings Greg Kroah-Hartman
2017-04-25 15:08 ` [PATCH 4.9 04/21] tracing: Allocate the snapshot buffer before enabling probe Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 05/21] ring-buffer: Have ring_buffer_iter_empty() return true when empty Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 06/21] mm: prevent NR_ISOLATE_* stats from going negative Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 07/21] cifs: Do not send echoes before Negotiate is complete Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 08/21] CIFS: remove bad_network_name flag Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 09/21] s390/mm: fix CMMA vs KSM vs others Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 10/21] Input: elantech - add Fujitsu Lifebook E547 to force crc_enabled Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 11/21] ACPI / power: Avoid maybe-uninitialized warning Greg Kroah-Hartman
2017-04-25 15:09 ` Greg Kroah-Hartman [this message]
2017-04-25 15:09 ` [PATCH 4.9 13/21] ubifs: Fix RENAME_WHITEOUT support Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 14/21] ubifs: Fix O_TMPFILE corner case in ubifs_link() Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 15/21] mac80211: reject ToDS broadcast data frames Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 16/21] mac80211: fix MU-MIMO follow-MAC mode Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 17/21] ubi/upd: Always flush after prepared for an update Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 18/21] powerpc/kprobe: Fix oops when kprobed on stdu instruction Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 19/21] x86/mce/AMD: Give a name to MCA bank 3 when accessed with legacy MSRs Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 20/21] x86/mce: Make the MCE notifier a blocking one Greg Kroah-Hartman
2017-04-25 15:09 ` [PATCH 4.9 21/21] device-dax: switch to srcu, fix rcu_read_lock() vs pte allocation Greg Kroah-Hartman
2017-04-25 18:24 ` [PATCH 4.9 00/21] 4.9.25-stable review Shuah Khan
2017-04-26 2:23 ` Guenter Roeck
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