mmc: sdhci-iproc: suppress spurious interrupt with Multiblock read
authorSrinath Mannam <srinath.mannam@broadcom.com>
Thu, 18 May 2017 16:57:40 +0000 (22:27 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 7 Jun 2017 10:07:47 +0000 (12:07 +0200)
commitecbf0f48d65ecd1eecfe6c81af8b9c2589ab5641
tree87ff0a647bb2dff349e0ffc20ade5eb78aa9641c
parent8735cf2291cdfaddf517113bf92edb6eaf20a371
mmc: sdhci-iproc: suppress spurious interrupt with Multiblock read

commit f5f968f2371ccdebb8a365487649673c9af68d09 upstream.

The stingray SDHCI hardware supports ACMD12 and automatically
issues after multi block transfer completed.

If ACMD12 in SDHCI is disabled, spurious tx done interrupts are seen
on multi block read command with below error message:

Got data interrupt 0x00000002 even though no data
operation was in progress.

This patch uses SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 to enable
ACM12 support in SDHCI hardware and suppress spurious interrupt.

Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Fixes: b580c52d58d9 ("mmc: sdhci-iproc: add IPROC SDHCI driver")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/host/sdhci-iproc.c