diff options
| author | Chaotian Jing <chaotian.jing@mediatek.com> | 2017-10-16 04:46:37 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-11-02 17:20:26 +0300 |
| commit | d17bb71c2c2cc2be23b1e20778fc87c80f8a7c9d (patch) | |
| tree | 23741659db351c9ae9f5b6fb15840e5b5b199263 | |
| parent | 3c1a8844369880d077f858f448afc4ef553d962a (diff) | |
| download | linux-d17bb71c2c2cc2be23b1e20778fc87c80f8a7c9d.tar.xz | |
mmc: mediatek: add latch-ck support
some platform(eg.mt2701) does not support "stop clk fix", in
this case, need set correct latch-ck to avoid crc error caused
by stop clock block-internally.
Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/mtk-sd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c index df57481b0dda..d8bd416fd471 100644 --- a/drivers/mmc/host/mtk-sd.c +++ b/drivers/mmc/host/mtk-sd.c @@ -378,6 +378,7 @@ struct msdc_host { u32 sclk; /* SD/MS bus clock frequency */ unsigned char timing; bool vqmmc_enabled; + u32 latch_ck; u32 hs400_ds_delay; u32 hs200_cmd_int_delay; /* cmd internal delay for HS200/SDR104 */ u32 hs400_cmd_int_delay; /* cmd internal delay for HS400 */ @@ -1661,6 +1662,8 @@ static int msdc_tune_data(struct mmc_host *mmc, u32 opcode) u32 tune_reg = host->dev_comp->pad_tune_reg; int i, ret; + sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_INT_DAT_LATCH_CK_SEL, + host->latch_ck); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_DSPL); sdr_clr_bits(host->base + MSDC_IOCON, MSDC_IOCON_W_DSPL); for (i = 0 ; i < PAD_DELAY_MAX; i++) { @@ -1773,6 +1776,9 @@ static const struct mmc_host_ops mt_msdc_ops = { static void msdc_of_property_parse(struct platform_device *pdev, struct msdc_host *host) { + of_property_read_u32(pdev->dev.of_node, "mediatek,latch-ck", + &host->latch_ck); + of_property_read_u32(pdev->dev.of_node, "hs400-ds-delay", &host->hs400_ds_delay); |