From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- .../devicetree/bindings/mmc/mmc-spi-slot.txt | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt (limited to 'Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt') diff --git a/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt new file mode 100644 index 000000000..75486cca8 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt @@ -0,0 +1,29 @@ +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). +- 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. + +Optional properties: +- 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>; + }; -- cgit v1.2.3