Kernel-4.18.0-80.el8_mmc-pwrseq-simple

• The simple MMC power sequence provider

The purpose of the simple MMC power sequence provider is to supports a set of
common properties between various SOC designs. It thus enables us to use the
same provider for several SOC designs.

Required properties:

• compatible : contains “mmc-pwrseq-simple”.

Optional properties:

• reset-gpios : contains a list of GPIO specifiers. The reset GPIOs are asserted
  at initialization and prior we start the power up procedure of the card.
  They will be de-asserted right after the power has been provided to the
  card.
• clocks : Must contain an entry for the entry in clock-names.
  See ../clocks/clock-bindings.txt for details.
• clock-names : Must include the following entry:
  “ext_clock” (External clock provided to the card).
• post-power-on-delay-ms : Delay in ms after powering the card and
  de-asserting the reset-gpios (if any)
• power-off-delay-us : Delay in us after asserting the reset-gpios (if any)
  during power off of the card.

Example:

sdhci0_pwrseq {
    compatible = "mmc-pwrseq-simple";
    reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
    clocks = <&clk_32768_ck>;
    clock-names = "ext_clock";
}