mvsdio: ignore high speed timing requests from the core

[firefly-linux-kernel-4.4.55.git] / drivers / mmc / host / mvsdio.c

diff --git a/drivers/mmc/host/mvsdio.c b/drivers/mmc/host/mvsdio.c
index 1783043a26afd01c4bf9d1784821a94222d91e19..9d3cfa9909c9c0f5d48247300462f9f82b6341f5 100644 (file)
--- a/drivers/mmc/host/mvsdio.c
+++ b/drivers/mmc/host/mvsdio.c
@@ -620,9 +620,18 @@ static void mvsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
        if (ios->bus_width == MMC_BUS_WIDTH_4)
                ctrl_reg |= MVSD_HOST_CTRL_DATA_WIDTH_4_BITS;
 
+       /*
+        * The HI_SPEED_EN bit is causing trouble with many (but not all)
+        * high speed SD, SDHC and SDIO cards.  Not enabling that bit
+        * makes all cards work.  So let's just ignore that bit for now
+        * and revisit this issue if problems for not enabling this bit
+        * are ever reported.
+        */
+#if 0
        if (ios->timing == MMC_TIMING_MMC_HS ||
            ios->timing == MMC_TIMING_SD_HS)
                ctrl_reg |= MVSD_HOST_CTRL_HI_SPEED_EN;
+#endif
 
        host->ctrl = ctrl_reg;
        mvsd_write(MVSD_HOST_CTRL, ctrl_reg);