[PATCH 3/4] arm64: dts: imx8mp: Switch WiFI enable signal to mmc-pwrseq-simple on i.MX8MP DHCOM SoM

[Marek Vasut <marex@denx.de>]

The reset-gpio is connected to WL_REG_EN signal of the WiFi MAC, the
mmc-pwrseq-simple driver is better suited to operate this signal as
it is tied to the slot instead of the MAC, and it can enable the MAC
before the brcmfmac driver binds to it. Make use of the MMC power
sequencer.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Frieder Schrempf <frieder.schrempf@kontron.de>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
---
 arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
index 1644b56c3953d..df43741d04bb9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-dhcom-som.dtsi
@@ -57,6 +57,11 @@ reg_vdd_3p3v_awo: regulator-vdd-3p3v-awo {	/* VDD_3V3_AWO */
 		regulator-max-microvolt = <3300000>;
 		regulator-name = "VDD_3P3V_AWO";
 	};
+
+	wlan_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
+	};
 };
 
 &A53_0 {
@@ -543,6 +548,7 @@ &usdhc1 {
 	pinctrl-0 = <&pinctrl_usdhc1>;
 	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
 	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	mmc-pwrseq = <&wlan_pwrseq>;
 	vmmc-supply = <&buck4>;
 	bus-width = <4>;
 	non-removable;
@@ -561,7 +567,6 @@ brcmf: bcrmf@1 {	/* muRata 2AE */
 		 * connected to the SoC, but can be connected on to
 		 * SoC pin on the carrier board.
 		 */
-		reset-gpios = <&gpio1 13 GPIO_ACTIVE_LOW>;
 	};
 };
 
-- 
2.40.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel