[PATCH v2 5/7] arm64: dts: imx8mq-librem5: add power sequencing for M.2 cards
From: Martin Kepplinger <hidden>
Date: 2021-10-05 13:50:15
Also in:
linux-devicetree, lkml, phone-devel
Subsystem:
arm/freescale imx / mxc / layerscape arm architecture, the rest · Maintainers:
Frank Li, Sascha Hauer, Linus Torvalds
From: Angus Ainslie <redacted> 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 <redacted> Signed-off-by: Martin Kepplinger <redacted> --- .../boot/dts/freescale/imx8mq-librem5.dtsi | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
index 7a09312f31c4..396eb4434229 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5.dtsi@@ -198,6 +198,14 @@ simple-audio-card,codec { }; }; + 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 @@ MX8MQ_IOMUXC_NAND_DQS_GPIO3_IO14 0x83 >; }; + 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 @@ MX8MQ_IOMUXC_SD2_RESET_B_USDHC2_RESET_B 0xc1 >; }; + 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 @@ &usdhc2 { pinctrl-2 = <&pinctrl_usdhc2_200mhz>; bus-width = <4>; vmmc-supply = <®_wifi_3v3>; + mmc-pwrseq = <&usdhc2_pwrseq>; post-power-on-delay-ms = <1000>; cd-gpios = <&gpio2 12 GPIO_ACTIVE_LOW>; disable-wp;
--
2.30.2
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