target/linux/mediatek/patches-4.14/0152-mmc-mediatek-make-hs400_tune_response-only-for-mt817.patch

   1 From bc70c7f1174b937af2784977281a1567f69dd2b6 Mon Sep 17 00:00:00 2001
   2 From: Chaotian Jing <chaotian.jing@mediatek.com>
   3 Date: Mon, 16 Oct 2017 09:46:31 +0800
   4 Subject: [PATCH 152/224] mmc: mediatek: make hs400_tune_response only for
   5  mt8173
   6
   7 the origin design of hs400_tune_response is for mt8173 because of
   8 mt8173 has a special design. for doing that, we add a new member
   9 "compatible", by now it's only for mt8173.
  10
  11 Signed-off-by: Chaotian Jing <chaotian.jing@mediatek.com>
  12 Tested-by: Sean Wang <sean.wang@mediatek.com>
  13 Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
  14 ---
  15  drivers/mmc/host/mtk-sd.c | 11 +++++++++--
  16  1 file changed, 9 insertions(+), 2 deletions(-)
  17
  18 --- a/drivers/mmc/host/mtk-sd.c
  19 +++ b/drivers/mmc/host/mtk-sd.c
  20 @@ -300,6 +300,7 @@ struct msdc_save_para {
  21
  22  struct mtk_mmc_compatible {
  23         u8 clk_div_bits;
  24 +       bool hs400_tune; /* only used for MT8173 */
  25  };
  26
  27  struct msdc_tune_para {
  28 @@ -360,18 +361,22 @@ struct msdc_host {
  29
  30  static const struct mtk_mmc_compatible mt8135_compat = {
  31         .clk_div_bits = 8,
  32 +       .hs400_tune = false,
  33  };
  34
  35  static const struct mtk_mmc_compatible mt8173_compat = {
  36         .clk_div_bits = 8,
  37 +       .hs400_tune = true,
  38  };
  39
  40  static const struct mtk_mmc_compatible mt2701_compat = {
  41         .clk_div_bits = 12,
  42 +       .hs400_tune = false,
  43  };
  44
  45  static const struct mtk_mmc_compatible mt2712_compat = {
  46         .clk_div_bits = 12,
  47 +       .hs400_tune = false,
  48  };
  49
  50  static const struct of_device_id msdc_of_ids[] = {
  51 @@ -666,7 +671,8 @@ static void msdc_set_mclk(struct msdc_ho
  52                        host->base + PAD_CMD_TUNE);
  53         }
  54
  55 -       if (timing == MMC_TIMING_MMC_HS400)
  56 +       if (timing == MMC_TIMING_MMC_HS400 &&
  57 +           host->dev_comp->hs400_tune)
  58                 sdr_set_field(host->base + PAD_CMD_TUNE,
  59                               MSDC_PAD_TUNE_CMDRRDLY,
  60                               host->hs400_cmd_int_delay);
  61 @@ -1594,7 +1600,8 @@ static int msdc_execute_tuning(struct mm
  62         struct msdc_host *host = mmc_priv(mmc);
  63         int ret;
  64
  65 -       if (host->hs400_mode)
  66 +       if (host->hs400_mode &&
  67 +           host->dev_comp->hs400_tune)
  68                 ret = hs400_tune_response(mmc, opcode);
  69         else
  70                 ret = msdc_tune_response(mmc, opcode);