[PATCH 1/4] phy: rockchip-emmc: give DLL some extra time to be ready

Heiko Stuebner heiko at sntech.de
Thu Jun 16 16:35:28 PDT 2016

Am Donnerstag, 12. Mai 2016, 15:43:03 schrieb Brian Norris:
> From: Shawn Lin <shawn.lin at rock-chips.com>
> According to the databook, 10.2us is the max time for dll to be ready to
> work. However in testing, some chips need 20us for dll to be ready. This
> patch adds some extra margin for dllrdy to be ready, fixing our
> -ETIMEDOUT issues.
> Signed-off-by: Shawn Lin <shawn.lin at rock-chips.com>
> Signed-off-by: Brian Norris <briannorris at chromium.org>

haven't looked to deep into the emmc-phy block, but on my rk3399-evb board 
the emmc still runs nicely with this patch, so

Tested-by: Heiko Stuebner <heiko at sntech.de>

More information about the Linux-rockchip mailing list