staging: mt7621-mmc: Remove unused sdio irq code

Currently the code for the sdio irq is never used, because the flags
for it (MSDC_(EXT_)SDIO_IRQ) are never set. So the whole code for it
can be removed.
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Reviewed-by: NeilBrown <neil@brown.name>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-mmc/board.h

@@ -39,8 +39,6 @@
 #define MSDC_CD_PIN_EN      (1 << 0)  /* card detection pin is wired   */
 #define MSDC_WP_PIN_EN      (1 << 1)  /* write protection pin is wired */
 #define MSDC_RST_PIN_EN     (1 << 2)  /* emmc reset pin is wired       */
-#define MSDC_SDIO_IRQ       (1 << 3)  /* use internal sdio irq (bus)   */
-#define MSDC_EXT_SDIO_IRQ   (1 << 4)  /* use external sdio irq         */
 #define MSDC_REMOVABLE      (1 << 5)  /* removable slot                */
 
 #define MSDC_SMPL_RISING    (0)

drivers/staging/mt7621-mmc/sd.c

@@ -1942,33 +1942,11 @@ static int msdc_ops_get_cd(struct mmc_host *mmc)
 	return present;
 }
 
-/* ops.enable_sdio_irq */
-static void msdc_ops_enable_sdio_irq(struct mmc_host *mmc, int enable)
-{
-	struct msdc_host *host = mmc_priv(mmc);
-	struct msdc_hw *hw = host->hw;
-	void __iomem *base = host->base;
-	u32 tmp;
-
-	if (hw->flags & MSDC_EXT_SDIO_IRQ) { /* yes for sdio */
-	} else {
-		ERR_MSG("XXX ");  /* so never enter here */
-		tmp = sdr_read32(SDC_CFG);
-		/* FIXME. Need to interrupt gap detection */
-		if (enable)
-			tmp |= (SDC_CFG_SDIOIDE | SDC_CFG_SDIOINTWKUP);
-		else
-			tmp &= ~(SDC_CFG_SDIOIDE | SDC_CFG_SDIOINTWKUP);
-		sdr_write32(SDC_CFG, tmp);
-	}
-}
-
 static struct mmc_host_ops mt_msdc_ops = {
 	.request         = msdc_ops_request,
 	.set_ios         = msdc_ops_set_ios,
 	.get_ro          = msdc_ops_get_ro,
 	.get_cd          = msdc_ops_get_cd,
-	.enable_sdio_irq = msdc_ops_enable_sdio_irq,
 };
 
 /*--------------------------------------------------------------------------*/
@@ -2330,9 +2308,6 @@ static int msdc_drv_probe(struct platform_device *pdev)
 	//TODO: read this as bus-width from dt (via mmc_of_parse)
 	mmc->caps  |= MMC_CAP_4_BIT_DATA;
 
-	if ((hw->flags & MSDC_SDIO_IRQ) || (hw->flags & MSDC_EXT_SDIO_IRQ))
-		mmc->caps |= MMC_CAP_SDIO_IRQ;  /* yes for sdio */
-
 	cd_active_low = !of_property_read_bool(pdev->dev.of_node, "mediatek,cd-high");
 
 	if (of_property_read_bool(pdev->dev.of_node, "mediatek,cd-poll"))