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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2019-01-24 09:28:59 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2020-01-14 09:05:55 +0100 |
| commit | 85eeaae3ccd2a0cd58e6f8e5794224948a6c40a2 (patch) | |
| tree | 296c6ba81a4894907676e89e976bd528bb6fc651 | |
| parent | 096d7f5b3e1c8d7ec121891d5682c385fad12b43 (diff) | |
| download | u-boot-85eeaae3ccd2a0cd58e6f8e5794224948a6c40a2.tar.gz | |
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>
| -rw-r--r-- | arch/arm/dts/zynqmp-zcu100-revC.dts | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/dts/zynqmp-zcu100-revC.dts b/arch/arm/dts/zynqmp-zcu100-revC.dts index 02573a1f32..986f50cf32 100644 --- a/arch/arm/dts/zynqmp-zcu100-revC.dts +++ b/arch/arm/dts/zynqmp-zcu100-revC.dts @@ -123,6 +123,7 @@ sdio_pwrseq: sdio-pwrseq { compatible = "mmc-pwrseq-simple"; reset-gpios = <&gpio 7 GPIO_ACTIVE_LOW>; /* WIFI_EN */ + post-power-on-delay-ms = <10>; }; ina226 { |