| MMC/SD/SDIO slot directly connected to a SPI bus |
| |
| This file documents differences between the core properties described |
| by mmc.txt and the properties used by the mmc_spi driver. |
| |
| Required properties: |
| - spi-max-frequency : maximum frequency for this device (Hz). |
| |
| Optional properties: |
| - voltage-ranges : two cells are required, first cell specifies minimum |
| slot voltage (mV), second cell specifies maximum slot voltage (mV). |
| Several ranges could be specified. If not provided, 3.2v..3.4v is assumed. |
| - gpios : may specify GPIOs in this order: Card-Detect GPIO, |
| Write-Protect GPIO. Note that this does not follow the |
| binding from mmc.txt, for historical reasons. |
| |
| Example: |
| |
| mmc-slot@0 { |
| compatible = "fsl,mpc8323rdb-mmc-slot", |
| "mmc-spi-slot"; |
| reg = <0>; |
| gpios = <&qe_pio_d 14 1 |
| &qe_pio_d 15 0>; |
| voltage-ranges = <3300 3300>; |
| spi-max-frequency = <50000000>; |
| interrupts = <42>; |
| interrupt-parent = <&PIC>; |
| }; |
