Documentation/devicetree/bindings/mmc/mmci.txt

   1 * ARM PrimeCell MultiMedia Card Interface (MMCI) PL180/1
   2
   3 The ARM PrimeCell MMCI PL180 and PL181 provides an interface for
   4 reading and writing to MultiMedia and SD cards alike.
   5
   6 This file documents differences between the core properties described
   7 by mmc.txt and the properties used by the mmci driver. Using "st" as
   8 the prefix for a property, indicates support by the ST Micro variant.
   9
  10 Required properties:
  11 - compatible             : contains "arm,pl18x", "arm,primecell".
  12 - vmmc-supply            : phandle to the regulator device tree node, mentioned
  13                            as the VCC/VDD supply in the eMMC/SD specs.
  14
  15 Optional properties:
  16 - arm,primecell-periphid : contains the PrimeCell Peripheral ID, it overrides
  17                            the ID provided by the HW
  18 - vqmmc-supply           : phandle to the regulator device tree node, mentioned
  19                            as the VCCQ/VDD_IO supply in the eMMC/SD specs.
  20 - st,sig-dir-dat0        : bus signal direction pin used for DAT[0].
  21 - st,sig-dir-dat2        : bus signal direction pin used for DAT[2].
  22 - st,sig-dir-dat31       : bus signal direction pin used for DAT[3] and DAT[1].
  23 - st,sig-dir-dat74       : bus signal direction pin used for DAT[4] to DAT[7].
  24 - st,sig-dir-cmd         : cmd signal direction pin used for CMD.
  25 - st,sig-pin-fbclk       : feedback clock signal pin used.
  26
  27 Deprecated properties:
  28 - mmc-cap-mmc-highspeed  : indicates whether MMC is high speed capable.
  29 - mmc-cap-sd-highspeed   : indicates whether SD is high speed capable.
  30
  31 Example:
  32
  33 sdi0_per1@80126000 {
  34         compatible = "arm,pl18x", "arm,primecell";
  35         reg = <0x80126000 0x1000>;
  36         interrupts = <0 60 IRQ_TYPE_LEVEL_HIGH>;
  37
  38         dmas = <&dma 29 0 0x2>, /* Logical - DevToMem */
  39                <&dma 29 0 0x0>; /* Logical - MemToDev */
  40         dma-names = "rx", "tx";
  41
  42         clocks = <&prcc_kclk 1 5>, <&prcc_pclk 1 5>;
  43         clock-names = "sdi", "apb_pclk";
  44
  45         max-frequency = <100000000>;
  46         bus-width = <4>;
  47         cap-sd-highspeed;
  48         cap-mmc-highspeed;
  49         cd-gpios  = <&gpio2 31 0x4>; // 95
  50         st,sig-dir-dat0;
  51         st,sig-dir-dat2;
  52         st,sig-dir-cmd;
  53         st,sig-pin-fbclk;
  54
  55         vmmc-supply = <&ab8500_ldo_aux3_reg>;
  56         vqmmc-supply = <&vmmci>;
  57
  58         pinctrl-names = "default", "sleep";
  59         pinctrl-0 = <&sdi0_default_mode>;
  60         pinctrl-1 = <&sdi0_sleep_mode>;
  61 };