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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2017-12-13 20:05:11 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-12-14 12:46:07 +0100 |
| commit | 9cce882bedd2768dc251b73f2ad86a9bfcfd9fc7 (patch) | |
| tree | 4cad033f301cd7628aea3ba08923b6f8e1500232 /Documentation/devicetree/bindings/spi | |
| parent | spi: sh-msiof: Avoid writing to registers from spi_master.setup() (diff) | |
| download | linux-9cce882bedd2768dc251b73f2ad86a9bfcfd9fc7.tar.xz linux-9cce882bedd2768dc251b73f2ad86a9bfcfd9fc7.zip | |
spi: sh-msiof: Extend support to 3 native chip selects
Currently only the MSIOF_SYNC signal can be used as a native chip
select. Extend support to up to 3 native chipselects using the
MSIOF_SS1 and MSIOF_SS2 signals.
Inspired by a patch in the BSP by Hiromitsu Yamasaki.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/spi')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/sh-msiof.txt | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/spi/sh-msiof.txt b/Documentation/devicetree/bindings/spi/sh-msiof.txt index bdd83959019c..bc8c16a6cfc8 100644 --- a/Documentation/devicetree/bindings/spi/sh-msiof.txt +++ b/Documentation/devicetree/bindings/spi/sh-msiof.txt @@ -36,7 +36,11 @@ Required properties: Optional properties: - clocks : Must contain a reference to the functional clock. -- num-cs : Total number of chip-selects (default is 1) +- num-cs : Total number of chip selects (default is 1). + Up to 3 native chip selects are supported: + 0: MSIOF_SYNC + 1: MSIOF_SS1 + 2: MSIOF_SS2 - dmas : Must contain a list of two references to DMA specifiers, one for transmission, and one for reception. |