1* The simple MMC power sequence provider 2 3The purpose of the simple MMC power sequence provider is to supports a set of 4common properties between various SOC designs. It thus enables us to use the 5same provider for several SOC designs. 6 7Required properties: 8- compatible : contains "mmc-pwrseq-simple". 9 10Optional properties: 11- reset-gpios : contains a list of GPIO specifiers. The reset GPIOs are asserted 12 at initialization and prior we start the power up procedure of the card. 13 They will be de-asserted right after the power has been provided to the 14 card. 15- clocks : Must contain an entry for the entry in clock-names. 16 See ../clocks/clock-bindings.txt for details. 17- clock-names : Must include the following entry: 18 "ext_clock" (External clock provided to the card). 19- post-power-on-delay-ms : Delay in ms after powering the card and 20 de-asserting the reset-gpios (if any) 21- power-off-delay-us : Delay in us after asserting the reset-gpios (if any) 22 during power off of the card. 23 24Example: 25 26 sdhci0_pwrseq { 27 compatible = "mmc-pwrseq-simple"; 28 reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>; 29 clocks = <&clk_32768_ck>; 30 clock-names = "ext_clock"; 31 } 32