[PATCH v2 0/1] mmc: core: sdio: Set SDIO clock of SDR104 to 150MHz for

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Marvell 8887 WiFi + Bluetooth chip fails with 200MHz SDIO clock which is used
in SDR104 mode, though the Marvell chip announces to support SDR104 mode.
Marvell does not recommend to use SDIO at the speed of higher than 150MHz.

The Marvell 8887 chip uses a MaskRom(IC) which prevents the firmware from
being updated to disable the support of SDR104 and DDR50.

Thus, the current patch solution reduces the SDIO clock of SDR104 to 150MHz.

Tested on a highly modified v3.14 kernel.

The baseline for this patch is:
https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git/commit/?h=next&id=4472f0fc248e3f0573301f725eff9dc9cde5cb62
"Merge branch 'fixes' into next" on the "next" branch, based on kernel
v4.16-rc5.

Changes in v2:
- Set max-frequency to 150M with SDR104 mode

Diwakar Sharma (1):
  mmc: core: sdio: Set SDIO clock of SDR104 to 150MHz for Marvell 8887
    chip

 drivers/mmc/core/card.h      |  5 +++++
 drivers/mmc/core/quirks.h    |  3 +++
 drivers/mmc/core/sdio.c      | 21 +++++++++++++++++++++
 include/linux/mmc/card.h     |  4 ++++
 include/linux/mmc/sdio_ids.h |  1 +
 5 files changed, 34 insertions(+)

--
1.9.1


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