An mmc/sdio host which is expecting interrupts from an SDIO card
should not turn off clocks unless the bus is configured to a width
of 1-bit. In 4-bit mode interrupts may not be generated without
the clock.
This series fixes omap_hsmmc to set 1-bit mode when appropriate
and so allows my wifi chip to work much better.
This is an RFC. The code seems to work, but I feel it could be
structured better (so that other drivers can share more of it), and
I need to convince myself there is no room for races.
Thanks,
NeilBrown
---
NeilBrown (3):
mmc: core: allow non-blocking form of mmc_claim_host
mmc: core: export functions for setting bus width.
mmc: omap_hsmmc: switch to 1-bit before turning off clocks if interrupts expected.
drivers/mmc/core/core.c | 4 ++-
drivers/mmc/core/sdio.c | 8 +++---
drivers/mmc/host/omap_hsmmc.c | 55 ++++++++++++++++++++++++++++++++++++++++-
include/linux/mmc/host.h | 4 +++
4 files changed, 64 insertions(+), 7 deletions(-)
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