mmc: tmio_mmc: implement SDIO IRQ support

This patch implements SDIO IRQ support for mfds which
announce the TMIO_MMC_SDIO_IRQ flag for tmio_mmc.
If MMC_CAP_SDIO_IRQ is also set SDIO IRQ signalling is activated.
Tested with a b43-based wireless SDIO card and sh_mobile_sdhi.

Signed-off-by: Arnd Hannemann <arnd@arndnet.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index dbfc053b1f95..8e70310ee945 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -57,6 +57,10 @@
  * is configured in 4-bit mode.
  */
 #define TMIO_MMC_BLKSZ_2BYTES           (1 << 1)
+/*
+ * Some controllers can support SDIO IRQ signalling.
+ */
+#define TMIO_MMC_SDIO_IRQ               (1 << 2)
 
 int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
 int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);