diff options
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/meson-gx-mmc.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/mmc/host/meson-gx-mmc.c b/drivers/mmc/host/meson-gx-mmc.c index 08a55c2e96e1..85745ef179e2 100644 --- a/drivers/mmc/host/meson-gx-mmc.c +++ b/drivers/mmc/host/meson-gx-mmc.c @@ -716,6 +716,22 @@ static int meson_mmc_clk_phase_tuning(struct mmc_host *mmc, u32 opcode, static int meson_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode) { struct meson_host *host = mmc_priv(mmc); + int ret; + + /* + * If this is the initial tuning, try to get a sane Rx starting + * phase before doing the actual tuning. + */ + if (!mmc->doing_retune) { + ret = meson_mmc_clk_phase_tuning(mmc, opcode, host->rx_clk); + + if (ret) + return ret; + } + + ret = meson_mmc_clk_phase_tuning(mmc, opcode, host->tx_clk); + if (ret) + return ret; return meson_mmc_clk_phase_tuning(mmc, opcode, host->rx_clk); } @@ -746,8 +762,9 @@ static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) if (!IS_ERR(mmc->supply.vmmc)) mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd); - /* Reset rx phase */ + /* Reset phases */ clk_set_phase(host->rx_clk, 0); + clk_set_phase(host->tx_clk, 270); break; |