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mmc: sdhci: convert to new SDIO IRQ handling

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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>
This commit is contained in:
Russell King 2014-04-25 12:55:46 +01:00 • committed by Chris Ball
parent ef104333a2
commit 781e989cf5
2 changed files with 41 additions and 23 deletions
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2
include/linux/mmc/sdhci.h
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@ -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 */