Core clock phase value is changed from 180' to 270'. It's more stable than before. - Odroidn-N2/C4 : Working fine with 52MHz - VIM3 : Working fine with 52MHz
Before this patch, Odroid-C4 doesn't work fine with 52MHz.
Signed-off-by: Jaehoon Chung jh80.chung@samsung.com --- drivers/mmc/meson_gx_mmc.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/meson_gx_mmc.c b/drivers/mmc/meson_gx_mmc.c index 719dd1e5e570..7c60e0566560 100644 --- a/drivers/mmc/meson_gx_mmc.c +++ b/drivers/mmc/meson_gx_mmc.c @@ -52,10 +52,16 @@ static void meson_mmc_config_clock(struct mmc *mmc) } clk_div = DIV_ROUND_UP(clk, mmc->clock);
- /* 180 phase core clock */ - meson_mmc_clk |= CLK_CO_PHASE_180; - - /* 180 phase tx clock */ + /* + * Clock Phase needs to set a proper value. + * It can be changed to other value. + * Because CORE : 270' Phase and TX : 0' Phase are stable, + * set to them by default. + */ + /* Core Clock Phase */ + meson_mmc_clk |= CLK_CO_PHASE_270; + + /* TX Clock Phase */ meson_mmc_clk |= CLK_TX_PHASE_000;
/* clock settings */