On Fri, 14 Aug 2020 at 03:44, Wenbin Mei wenbin.mei@mediatek.com wrote:
This patch fixs eMMC-Access on mt7622/Bpi-64. Before we got these Errors on mounting eMMC ion R64: [ 48.664925] blk_update_request: I/O error, dev mmcblk0, sector 204800 op 0x1:(WRITE) flags 0x800 phys_seg 1 prio class 0 [ 48.676019] Buffer I/O error on dev mmcblk0p1, logical block 0, lost sync page write
This patch adds a optional reset management for msdc. Sometimes the bootloader does not bring msdc register to default state, so need reset the msdc controller.
Cc: stable@vger.kernel.org # v5.4+ Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC") Signed-off-by: Wenbin Mei wenbin.mei@mediatek.com Reviewed-by: Philipp Zabel p.zabel@pengutronix.de Tested-by: Frank Wunderlich frank-w@public-files.de
Applied for fixes, but needed to resolve a conflict when applying, thanks!
drivers/mmc/host/mtk-sd.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index 39e7fc54c438..fc97d5bf3a20 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -22,6 +22,7 @@ #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/interrupt.h> +#include <linux/reset.h>
#include <linux/mmc/card.h> #include <linux/mmc/core.h> @@ -434,6 +435,7 @@ struct msdc_host { struct msdc_save_para save_para; /* used when gate HCLK */ struct msdc_tune_para def_tune_para; /* default tune setting */ struct msdc_tune_para saved_tune_para; /* tune result of CMD21/CMD19 */
struct reset_control *reset;
I moved this a couple of lines above, since this conflicts with later changes for mtk-sd.
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Kind regards Uffe