[PATCH 0/3] mmc: sdhci-iproc: add bcm2835 support

Stefan Wahren stefan.wahren at i2se.com
Wed Jan 27 14:25:39 PST 2016

This patch series based on the suggestion of Scott Branden to implement
bcm2835 support into sdhci-iproc [1].

These changes provide the following advantages:
  * no need to maintain a separate driver for bcm2835
  * improve support and test coverage of bcm2835 mmc support
  * get the rid of SDHCI_CAPABILITIES hack in bcm2835_sdhci_readl
  * increase write performance by avoiding delays in write ops

Patch 1 prepare sdhci-iproc for another platform. Patch 2 and 3
are the actually changes for bcm2835 support.

These series has been tested on Raspberry Pi B with dd (direct I/O):


378 kB/s WRITE
10,6 MB/s READ

sdhci-iproc (after applying patch series)

881 kB/s WRITE
10,8 MB/s READ

Changes since RFC:
  * drop patch which tries to add quirks for bcm2835 in DT and define all
    quirks in driver instead to keep old DTs working with sdhci-iproc
    (suggestion by Stephen Warren)
  * define MMC caps in shdci-iproc platform data to make adding new
    platforms more easily (suggestion by Stephen Warren)

[1] - https://lkml.org/lkml/2015/12/22/525

Stefan Wahren (3):
  mmc: sdhci-iproc: define MMC caps in platform data
  mmc: sdhci-iproc: add bcm2835 support
  DT: sdhci-iproc: add bcm2835 compatible

 .../devicetree/bindings/mmc/brcm,sdhci-iproc.txt   |    5 ++++-
 drivers/mmc/host/Kconfig                           |    6 +++---
 drivers/mmc/host/sdhci-iproc.c                     |   20 ++++++++++++++++++--
 3 files changed, 25 insertions(+), 6 deletions(-)


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