Documentation/devicetree/bindings/spi/ti_qspi.txt

   1 TI QSPI controller.
   2
   3 Required properties:
   4 - compatible : should be "ti,dra7xxx-qspi" or "ti,am4372-qspi".
   5 - reg: Should contain QSPI registers location and length.
   6 - reg-names: Should contain the resource reg names.
   7         - qspi_base: Qspi configuration register Address space
   8         - qspi_mmap: Memory mapped Address space
   9         - (optional) qspi_ctrlmod: Control module Address space
  10 - interrupts: should contain the qspi interrupt number.
  11 - #address-cells, #size-cells : Must be present if the device has sub-nodes
  12 - ti,hwmods: Name of the hwmod associated to the QSPI
  13
  14 Recommended properties:
  15 - spi-max-frequency: Definition as per
  16                      Documentation/devicetree/bindings/spi/spi-bus.txt
  17
  18 Optional properties:
  19 - syscon-chipselects: Handle to system control region contains QSPI
  20                       chipselect register and offset of that register.
  21
  22 NOTE: TI QSPI controller requires different pinmux and IODelay
  23 parameters for Mode-0 and Mode-3 operations, which needs to be set up by
  24 the bootloader (U-Boot). Default configuration only supports Mode-0
  25 operation. Hence, "spi-cpol" and "spi-cpha" DT properties cannot be
  26 specified in the slave nodes of TI QSPI controller without appropriate
  27 modification to bootloader.
  28
  29 Example:
  30
  31 For am4372:
  32 qspi: qspi@4b300000 {
  33         compatible = "ti,am4372-qspi";
  34         reg = <0x47900000 0x100>, <0x30000000 0x4000000>;
  35         reg-names = "qspi_base", "qspi_mmap";
  36         #address-cells = <1>;
  37         #size-cells = <0>;
  38         spi-max-frequency = <25000000>;
  39         ti,hwmods = "qspi";
  40 };
  41
  42 For dra7xx:
  43 qspi: qspi@4b300000 {
  44         compatible = "ti,dra7xxx-qspi";
  45         reg = <0x4b300000 0x100>,
  46               <0x5c000000 0x4000000>,
  47         reg-names = "qspi_base", "qspi_mmap";
  48         syscon-chipselects = <&scm_conf 0x558>;
  49         #address-cells = <1>;
  50         #size-cells = <0>;
  51         spi-max-frequency = <48000000>;
  52         ti,hwmods = "qspi";
  53 };