tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1MMC/SD/SDIO slot directly connected to a SPI bus
2
3Required properties:
4- compatible : should be "mmc-spi-slot".
5- reg : should specify SPI address (chip-select number).
6- spi-max-frequency : maximum frequency for this device (Hz).
7- voltage-ranges : two cells are required, first cell specifies minimum
8 slot voltage (mV), second cell specifies maximum slot voltage (mV).
9 Several ranges could be specified.
10
11Optional properties:
12- gpios : may specify GPIOs in this order: Card-Detect GPIO,
13 Write-Protect GPIO.
14- interrupts : the interrupt of a card detect interrupt.
15- interrupt-parent : the phandle for the interrupt controller that
16 services interrupts for this device.
17
18Example:
19
20 mmc-slot@0 {
21 compatible = "fsl,mpc8323rdb-mmc-slot",
22 "mmc-spi-slot";
23 reg = <0>;
24 gpios = <&qe_pio_d 14 1
25 &qe_pio_d 15 0>;
26 voltage-ranges = <3300 3300>;
27 spi-max-frequency = <50000000>;
28 interrupts = <42>;
29 interrupt-parent = <&PIC>;
30 };