mmc: mmci: Break out a helper function

These four lines clearing, masking and resetting the state
of the busy detect state machine is repeated five times in
the code so break this out to a small helper so things are
easier to read.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230405-pl180-busydetect-fix-v7-9-69a7164f2a61@linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: Linus Walleij

drivers/mmc/host/mmci.c

@@ -654,6 +654,17 @@ static u32 ux500v2_get_dctrl_cfg(struct mmci_host *host)
 	return MCI_DPSM_ENABLE | (host->data->blksz << 16);
 }
 
+static void ux500_busy_clear_mask_done(struct mmci_host *host)
+{
+	void __iomem *base = host->base;
+
+	writel(host->variant->busy_detect_mask, base + MMCICLEAR);
+	writel(readl(base + MMCIMASK0) &
+	       ~host->variant->busy_detect_mask, base + MMCIMASK0);
+	host->busy_state = MMCI_BUSY_DONE;
+	host->busy_status = 0;
+}
+
 /*
  * ux500_busy_complete() - this will wait until the busy status
  * goes off, saving any status that occur in the meantime into
@@ -678,11 +689,7 @@ static bool ux500_busy_complete(struct mmci_host *host, u32 status, u32 err_msk)
 
 	if (status & err_msk) {
 		/* Stop any ongoing busy detection if an error occurs */
-		writel(host->variant->busy_detect_mask, base + MMCICLEAR);
-		writel(readl(base + MMCIMASK0) &
-		       ~host->variant->busy_detect_mask, base + MMCIMASK0);
-		host->busy_state = MMCI_BUSY_DONE;
-		host->busy_status = 0;
+		ux500_busy_clear_mask_done(host);
 		goto out_ret_state;
 	}
 
@@ -724,10 +731,7 @@ static bool ux500_busy_complete(struct mmci_host *host, u32 status, u32 err_msk)
 			retries--;
 		}
 		dev_dbg(mmc_dev(host->mmc), "no busy signalling in time\n");
-		writel(host->variant->busy_detect_mask, base + MMCICLEAR);
-		writel(readl(base + MMCIMASK0) &
-		       ~host->variant->busy_detect_mask, base + MMCIMASK0);
-		host->busy_state = MMCI_BUSY_DONE;
+		ux500_busy_clear_mask_done(host);
 		break;
 
 	/*
@@ -749,18 +753,15 @@ static bool ux500_busy_complete(struct mmci_host *host, u32 status, u32 err_msk)
 		} else {
 			dev_dbg(mmc_dev(host->mmc),
 				"lost busy status when waiting for busy start IRQ\n");
-			writel(host->variant->busy_detect_mask, base + MMCICLEAR);
-			writel(readl(base + MMCIMASK0) &
-			       ~host->variant->busy_detect_mask, base + MMCIMASK0);
-			host->busy_state = MMCI_BUSY_DONE;
-			host->busy_status = 0;
+			ux500_busy_clear_mask_done(host);
 		}
 		break;
 
 	case MMCI_BUSY_WAITING_FOR_END_IRQ:
 		if (!(status & host->variant->busy_detect_flag)) {
 			host->busy_status |= status & (MCI_CMDSENT | MCI_CMDRESPEND);
-			host->busy_state = MMCI_BUSY_DONE;
+			writel(host->variant->busy_detect_mask, base + MMCICLEAR);
+			ux500_busy_clear_mask_done(host);
 		} else {
 			dev_dbg(mmc_dev(host->mmc),
 				"busy status still asserted when handling busy end IRQ - will keep waiting\n");