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| author | Lucas Stach <l.stach@pengutronix.de> | 2013-03-15 08:49:26 (GMT) |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-05-26 17:13:31 (GMT) |
| commit | 361b8482026c926997b1d3d5a045bc9f5bc02b16 (patch) | |
| tree | 179f823862e459a99e1317a3e200dba7a0500d64 /drivers/mfd/rtsx_pcr.h | |
| parent | f6825748bdbe381cfffe2dc13ca0b73050428fac (diff) | |
| download | linux-fsl-qoriq-361b8482026c926997b1d3d5a045bc9f5bc02b16.tar.xz | |
mmc: sdhci-esdhc-imx: fix multiblock reads on i.MX53
The eSDHC controller on the i.MX53 needs an additional, non spec
compliant CMD12 after a multiblock read with a predefined number of
blocks. Otherwise the internal state machine won't go back to the
idle state.
This commit effectively reverts 5b6b0ad6 (mmc: sdhci-esdhc-imx:
fix for mmc cards on i.MX5), which fixed part of the problem by
making multiblock reads work, however this fix was not sufficient
when multi- and singleblock reads got intermixed.
This implements the recommended workaround (Freescale i.MX Reference
Manual, section 29.6.8 "Multi-block Read") by manually sending a
CMD12 with the RSPTYP bits cleared.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mfd/rtsx_pcr.h')
0 files changed, 0 insertions, 0 deletions