Commit bac135da authored by Jerome Brunet's avatar Jerome Brunet Committed by Ulf Hansson

mmc: meson-gx: change default tx phase

Initial default tx phase was set to 0 while the datasheet recommends 270.
Some cards fails to initialize with this setting and eMMC mode DDR52 does
not work.

Changing this setting to 270 fixes these issues, without any regression
so far
Reviewed-by: default avatarKevin Hilman <khilman@baylibre.com>
Signed-off-by: default avatarJerome Brunet <jbrunet@baylibre.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent b1231b2f
...@@ -1156,8 +1156,14 @@ static int meson_mmc_probe(struct platform_device *pdev) ...@@ -1156,8 +1156,14 @@ static int meson_mmc_probe(struct platform_device *pdev)
if (ret) if (ret)
goto free_host; goto free_host;
/*
* Set phases : These values are mostly the datasheet recommended ones
* except for the Tx phase. Datasheet recommends 180 but some cards
* fail at initialisation with it. 270 works just fine, it fixes these
* initialisation issues and enable eMMC DDR52 mode.
*/
host->tp.core_phase = 180; host->tp.core_phase = 180;
host->tp.tx_phase = 0; host->tp.tx_phase = 270;
host->tp.rx_phase = 0; host->tp.rx_phase = 0;
ret = meson_mmc_clk_init(host); ret = meson_mmc_clk_init(host);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment