ref: 9eb192f586316361a78cf399b410716ee20ed132
parent: 80268af29eb1dfc1ca4fc528f70c5af17286dd2c
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Sun Nov 7 12:51:12 EST 2021
bcm64: parse the emmc2bus/dma-ranges device-tree property and provide *emmc2bus kernel parameter
/*
* emmc2 has different DMA constraints based on SoC revisions. It was
* moved into its own bus, so as for RPi4's firmware to update them.
* The firmware will find whether the emmc2bus alias is defined, and if
* so, it'll edit the dma-ranges property below accordingly.
*/
emmc2bus: emmc2bus {
compatible = "simple-bus";
ranges = <0x0 0x7e000000 0x0 0xfe000000 0x01800000>;
dma-ranges = <0x0 0xc0000000 0x0 0x00000000 0x40000000>;
emmc2: mmc@7e340000 {
compatible = "brcm,bcm2711-emmc2";
reg = <0x0 0x7e340000 0x100>;
interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clocks BCM2711_CLOCK_EMMC2>;
status = "disabled";
};
};