Commit 0898ed68 authored by Richard Zhu's avatar Richard Zhu Committed by Shawn Guo
Browse files

arm64: dts: imx95-19x19-evk: Add Tsettle delay in m2 regulator 



M.2 device only can be enabled after all Power Rails reach their minimum
operating voltage (PCI Express M.2 Specification r5.1 3.1.4 Power-up
Timing). Set a delay equal to the max value of Tsettle in m2 regulator.

Signed-off-by: default avatarRichard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarPeng Fan <peng.fan@nxp.com>
Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
parent 06d59fec

arch/arm64/boot/dts/freescale/imx95-19x19-evk.dts

+7 −0
Original line number Diff line number Diff line
@@ -136,6 +136,13 @@ reg_m2_pwr: regulator-m2-pwr { 
		regulator-max-microvolt = <3300000>;

		gpio = <&i2c7_pcal6524 20 GPIO_ACTIVE_HIGH>;

		enable-active-high;

		/*

		 * M.2 device only can be enabled(W_DISABLE1#) after all Power

		 * Rails reach their minimum operating voltage (PCI Express M.2

		 * Specification r5.1 3.1.4 Power-up Timing).

		 * Set a delay equal to the max value of Tsettle here.

		 */

		startup-delay-us = <5000>;

	};



	reg_pcie0: regulator-pcie {