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arm64: dts: imx8mq-librem5: add power sequencing for M.2 cards

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Some wifi cards need reset asserted until after the power supplies
have been enabled.

So wire up the W_DISABLE signal for the SDIO port (WIFI_REG_ON net) and
the BT_REG_ON net to use it for power sequencing.

Signed-off-by: Angus Ainslie <angus@akkea.ca>
Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Angus Ainslie 2021-10-05 15:49:00 +02:00 • committed by Shawn Guo
parent c3817595d6
commit 2344af0d5b
1 changed files with 23 additions and 0 deletions
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23
arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
View file

@ -198,6 +198,14 @@
};
};
usdhc2_pwrseq: pwrseq {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_bt>, <&pinctrl_wifi_disable>;
compatible = "mmc-pwrseq-simple";
reset-gpios = <&gpio3 25 GPIO_ACTIVE_HIGH>,
<&gpio4 29 GPIO_ACTIVE_HIGH>;
};
bm818_codec: sound-wwan-codec {
compatible = "broadmobi,bm818", "option,gtm601";
#sound-dai-cells = <0>;
@ -312,6 +320,13 @@
>;
};
pinctrl_bt: btgrp {
fsl,pins = <
/* BT_REG_ON */
MX8MQ_IOMUXC_SAI5_MCLK_GPIO3_IO25 0x83
>;
};
pinctrl_charger_in: chargeringrp {
fsl,pins = <
/* CHRG_INT */
@ -643,6 +658,13 @@
>;
};
pinctrl_wifi_disable: wifidisablegrp {
fsl,pins = <
/* WIFI_REG_ON */
MX8MQ_IOMUXC_SAI3_RXC_GPIO4_IO29 0x83
>;
};
pinctrl_wifi_pwr: wifipwrgrp {
fsl,pins = <
/* WIFI3V3_EN */
@ -1212,6 +1234,7 @@
pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
bus-width = <4>;
vmmc-supply = <&reg_wifi_3v3>;
mmc-pwrseq = <&usdhc2_pwrseq>;
post-power-on-delay-ms = <1000>;
cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>;
disable-wp;