1* The simple eMMC hardware reset provider
2
3The purpose of this driver is to perform standard eMMC hw reset
4procedure, as descibed by Jedec 4.4 specification. This procedure is
5performed just after MMC core enabled power to the given mmc host (to
6fix possible issues if bootloader has left eMMC card in initialized or
7unknown state), and before performing complete system reboot (also in
8case of emergency reboot call). The latter is needed on boards, which
9doesn't have hardware reset logic connected to emmc card and (limited or
10broken) ROM bootloaders are unable to read second stage from the emmc
11card if the card is left in unknown or already initialized state.
12
13Required properties:
14- compatible : contains "mmc-pwrseq-emmc".
15- reset-gpios : contains a GPIO specifier. The reset GPIO is asserted
16	and then deasserted to perform eMMC card reset. To perform
17	reset procedure as described in Jedec 4.4 specification, the
18	gpio line should be defined as GPIO_ACTIVE_LOW.
19
20Example:
21
22	sdhci0_pwrseq {
23		compatible = "mmc-pwrseq-emmc";
24		reset-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
25	}
26