ARM: dts: imx7d-nitrogen7: Use mmc-pwrseq to activate the Wifi clock

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 <[email protected]>

---
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(-)

arch/arm/boot/dts/imx7d-nitrogen7.dts +0 -0

index 4fb7e84..9ba9084 100644

arch/arm/boot/dts/imx7d-nitrogen7.dts +6 -0

 		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 {

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 <[email protected]>