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ARM: dts: imx7d-pico: Describe the Wifi clock 

The Wifi chip should be clocked by a 32kHz clock coming from i.MX7D
CLKO2 output pin, so describe the pinmux and clock hierarchy in the
device tree to allow the Wifi chip to be properly clocked.

Managed to successfully test Wifi with such change. Used the standard
nvram.txt file provided by TechNexion, which selects an external 32kHz
clock for the Wifi chip by default.

Fixes: 99a52450c7 ("ARM: dts: imx7d-pico: Add Wifi support")
Suggested-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Tested-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Fabio Estevam 2018-11-30 08:31:29 -02:00 committed by Shawn Guo
parent 512cab3e7e
commit c3b9ab5db1
1 changed files with 21 additions and 1 deletions
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22
arch/arm/boot/dts/imx7d-pico.dtsi
View File

@ -100,6 +100,19 @@
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
};
usdhc2_pwrseq: usdhc2_pwrseq {
compatible = "mmc-pwrseq-simple";
clocks = <&clks IMX7D_CLKO2_ROOT_DIV>;
clock-names = "ext_clock";
};
};
&clks {
assigned-clocks = <&clks IMX7D_CLKO2_ROOT_SRC>,
<&clks IMX7D_CLKO2_ROOT_DIV>;
assigned-clock-parents = <&clks IMX7D_CKIL>;
assigned-clock-rates = <0>, <32768>;
};
&i2c4 {
@ -199,12 +212,13 @@
&usdhc2 { /* Wifi SDIO */
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usdhc2>;
pinctrl-0 = <&pinctrl_usdhc2 &pinctrl_wifi_clk>;
no-1-8-v;
non-removable;
keep-power-in-suspend;
wakeup-source;
vmmc-supply = <&reg_ap6212>;
mmc-pwrseq = <&usdhc2_pwrseq>;
status = "okay";
};
@ -301,6 +315,12 @@
};
&iomuxc_lpsr {
pinctrl_wifi_clk: wificlkgrp {
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO03__CCM_CLKO2 0x7d
>;
};
pinctrl_wdog: wdoggrp {
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO00__WDOG1_WDOG_B 0x74