arm64: dts: zcu100-revC: Give wifi some time after power-on
authorJan Kiszka <jan.kiszka@siemens.com>
Thu, 24 Jan 2019 08:28:59 +0000 (09:28 +0100)
committerMichal Simek <michal.simek@xilinx.com>
Tue, 14 Jan 2020 08:05:55 +0000 (09:05 +0100)
commit85eeaae3ccd2a0cd58e6f8e5794224948a6c40a2
tree296c6ba81a4894907676e89e976bd528bb6fc651
parent096d7f5b3e1c8d7ec121891d5682c385fad12b43
arm64: dts: zcu100-revC: Give wifi some time after power-on

Somewhere along recent changes to power control of the wl1831, power-on
became very unreliable on the Ultra96, failing like this:

wl1271_sdio: probe of mmc2:0001:1 failed with error -16
wl1271_sdio: probe of mmc2:0001:2 failed with error -16

After playing with some dt parameters and comparing to other users of
this chip, it turned out we need some power-on delay to make things
stable again. In contrast to those other users which define 200 ms,
Ultra96 is already happy with 10 ms.

Fixes: 5869ba0653b9 ("arm64: zynqmp: Add support for Xilinx zcu100-revC")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
arch/arm/dts/zynqmp-zcu100-revC.dts