[PATCH 2/2] phy: rockchip-emmc: try to get drive impedance from DT

Doug Anderson dianders at chromium.org
Thu Jan 5 16:51:32 PST 2017


On Thu, Jan 5, 2017 at 1:31 AM, Shawn Lin <shawn.lin at rock-chips.com> wrote:
> Try to get drive impedance from DT and use it, otherwise
> use 50ohm by default in order not to break the existing boards
> as 50ohm works fine for them already.
> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
> ---
>  drivers/phy/phy-rockchip-emmc.c | 29 ++++++++++++++++++++++++++++-
>  1 file changed, 28 insertions(+), 1 deletion(-)

I could have sworn that you somehow needed to make sure that the eMMC
part itself needed to also be updated to be told the matching drive
impedance so you don't get a mismatch.  How do you make that work?
...or am I just confused.  I meant to try to dig more, but ran out of
time today.  :(


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