u-boot/doc/device-tree-bindings/spi/spi-cadence.txt
Vikas Manocha 8097cba809 spi: cadence_qspi: add device tree binding doc
This patch adds the device tree binding doc for the cadence qspi controller &
also removes the not needed properties from the stv0991 device tree.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Jagannadh Teki <jteki@openedev.com>
2015-07-03 13:50:53 +05:30

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Cadence QSPI controller device tree bindings
--------------------------------------------
Required properties:
- compatible : should be "cadence,qspi".
- reg : 1.Physical base address and size of SPI registers map.
2. Physical base address & size of NOR Flash.
- clocks : Clock phandles (see clock bindings for details).
- sram-size : spi controller sram size.
- status : enable in requried dts.
connected flash properties
--------------------------
- spi-max-frequency : Max supported spi frequency.
- page-size : Flash page size.
- block-size : Flash memory block size.
- tshsl-ns : Added delay in master reference clocks (ref_clk) for
the length that the master mode chip select outputs
are de-asserted between transactions.
- tsd2d-ns : Delay in master reference clocks (ref_clk) between one
chip select being de-activated and the activation of
another.
- tchsh-ns : Delay in master reference clocks between last bit of
current transaction and de-asserting the device chip
select (n_ss_out).
- tslch-ns : Delay in master reference clocks between setting
n_ss_out low and first bit transfer