[PATCH] ARM: dts: imx7d-pico: Describe the Wifi clock
From: festevam@gmail.com (Fabio Estevam)
Date: 2018-11-28 19:20:06
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. Suggested-by: Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> --- arch/arm/boot/dts/imx7d-pico.dtsi | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/imx7d-pico.dtsi b/arch/arm/boot/dts/imx7d-pico.dtsi
index 4846df0..934a019 100644
--- a/arch/arm/boot/dts/imx7d-pico.dtsi
+++ b/arch/arm/boot/dts/imx7d-pico.dtsi@@ -101,6 +101,19 @@ 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 {
@@ -200,12 +213,13 @@ &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 = <®_ap6212>; + mmc-pwrseq = <&usdhc2_pwrseq>; status = "okay"; };
@@ -302,6 +316,12 @@ }; &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
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2.7.4