mmc: sdhci: convert to new SDIO IRQ handling

Use a generic threaded interrupt handler for SDIO interrupt handling,
rather than allowing the SDIO core code to buggily spawn its own
thread.  This results in host drivers to be more in control of how
SDIO interrupts are acknowledged in the hardware, rather than having
the internals of the SDIO core placed upon them, possibly resulting
in sub-standard handling.

At least one SDHCI implementation specifies a very specific sequence
to deal with a card interrupt.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Pargmann <mpa@pengutronix.de>
Tested-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 7be12b883485..d1aa97b77dd9 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -177,6 +177,8 @@ struct sdhci_host {
         unsigned int            ocr_avail_mmc;
         u32 ocr_mask;           /* available voltages */
 
+        u32                     thread_isr;
+
         wait_queue_head_t       buf_ready_int;  /* Waitqueue for Buffer Read Ready interrupt */
         unsigned int            tuning_done;    /* Condition flag set when CMD19 succeeds */