CC devicetree@xxxxxxxxxxxxxxx for the bindings part.
On Tue, Dec 17, 2013 at 10:44 PM, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote:
> From: Wolfram Sang <wsa@xxxxxxxxxxxxxxxxxxxx>
>
> Tested with a r7s72100 genmai board acessing an eeprom.
>
> Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/i2c/i2c-riic.txt | 29 ++
> drivers/i2c/busses/Kconfig | 10 +
> drivers/i2c/busses/Makefile | 1 +
> drivers/i2c/busses/i2c-riic.c | 426 +++++++++++++++++++++
> 4 files changed, 466 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/i2c/i2c-riic.txt
> create mode 100644 drivers/i2c/busses/i2c-riic.c
>
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-riic.txt b/Documentation/devicetree/bindings/i2c/i2c-riic.txt
> new file mode 100644
> index 0000000..900d129
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/i2c-riic.txt
> @@ -0,0 +1,29 @@
> +Device tree configuration for i2c-ocores
(e.g.) ... for Renesas RIIC SPI
> +
> +Required properties:
> +- compatible : "renesas,riic-<soctype>". "renesas,riic-rz" as fallback
> +- reg : address start and address range size of device
> +- interrupts : 8 interrupts (TEI, RI, TI, SPI, STI, NAKI, ALI, TMOI)
> +- clock-frequency : frequency of bus clock in Hz
> +- #address-cells : should be <1>
> +- #size-cells : should be <0>
> +
> +Pinctrl properties might be needed, too. See there.
> +
> +Example:
> +
> + i2c0: i2c@fcfee000 {
> + compatible = "renesas,riic-r7s72100", "renesas,riic-rz";
> + reg = <0xfcfee000 0x44>;
> + interrupts = <0 157 IRQ_TYPE_LEVEL_HIGH>,
> + <0 158 IRQ_TYPE_EDGE_RISING>,
> + <0 159 IRQ_TYPE_EDGE_RISING>,
> + <0 160 IRQ_TYPE_LEVEL_HIGH>,
> + <0 161 IRQ_TYPE_LEVEL_HIGH>,
> + <0 162 IRQ_TYPE_LEVEL_HIGH>,
> + <0 163 IRQ_TYPE_LEVEL_HIGH>,
> + <0 164 IRQ_TYPE_LEVEL_HIGH>;
> + clock-frequency = <100000>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> + };
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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