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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2019-01-24 09:28:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-13 14:01:30 -0700 |
| commit | bab3cf9d1531b6d4f67b2479cd5f51c55f418014 (patch) | |
| tree | 67dc82624ec8175ee5cfd5bf832ef9c474d3ea32 /arch/arm64/boot | |
| parent | 39ab777e42eca09cceb71ba354a3e7eaa82fb1df (diff) | |
| download | talos-obmc-linux-bab3cf9d1531b6d4f67b2479cd5f51c55f418014.tar.gz talos-obmc-linux-bab3cf9d1531b6d4f67b2479cd5f51c55f418014.zip | |
arm64: dts: zcu100-revC: Give wifi some time after power-on
commit 35a4f89cd4731ac6ec985cd29ddc1630903006b7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/boot')
| -rw-r--r-- | arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts index 13a0a028df98..e5699d0d91e4 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts +++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts @@ -101,6 +101,7 @@ sdio_pwrseq: sdio-pwrseq { compatible = "mmc-pwrseq-simple"; reset-gpios = <&gpio 7 GPIO_ACTIVE_LOW>; /* WIFI_EN */ + post-power-on-delay-ms = <10>; }; }; |
