From mboxrd@z Thu Jan 1 00:00:00 1970 From: festevam@gmail.com (Fabio Estevam) Date: Thu, 29 Nov 2018 07:27:59 -0200 Subject: [RFC] ARM: dts: imx7d-nitrogen7: Use mmc-pwrseq to activate the Wifi clock Message-ID: <1543483679-1100-1-git-send-email-festevam@gmail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org In order to turn on the Wifi clock the correct location for describing the CLKO2 clock is via a mmc-pwrseq handle, so do it accordingly. Signed-off-by: Fabio Estevam --- Hi Gary/Troy, I don't have access to this board, but I was working on something similar for imx7d-pico-pi and needed to add mmc-pwrseq in order to turn on the 32kHz clock: http://lists.infradead.org/pipermail/linux-arm-kernel/2018-November/616048.html Is the 32kHz clock still needed for the Wifi chip used in the latest version of nitrogen7? What do you think about this patch? Thanks arch/arm/boot/dts/imx7d-nitrogen7.dts | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/imx7d-nitrogen7.dts b/arch/arm/boot/dts/imx7d-nitrogen7.dts index 4fb7e84..9ba9084 100644 --- a/arch/arm/boot/dts/imx7d-nitrogen7.dts +++ b/arch/arm/boot/dts/imx7d-nitrogen7.dts @@ -87,13 +87,17 @@ compatible = "regulator-fixed"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; - clocks = <&clks IMX7D_CLKO2_ROOT_DIV>; - clock-names = "slow"; regulator-name = "reg_wlan"; startup-delay-us = <70000>; gpio = <&gpio4 21 GPIO_ACTIVE_HIGH>; enable-active-high; }; + + usdhc2_pwrseq: usdhc2_pwrseq { + compatible = "mmc-pwrseq-simple"; + clocks = <&clks IMX7D_CLKO2_ROOT_DIV>; + clock-names = "slow"; + }; }; &adc1 { @@ -376,6 +380,7 @@ bus-width = <4>; non-removable; vmmc-supply = <®_wlan>; + mmc-pwrseq = <&usdhc2_pwrseq>; cap-power-off-card; keep-power-in-suspend; status = "okay"; -- 2.7.4