On Wed, Jun 22, 2016 at 09:07:15PM +0200, Karl-Heinz Schneider wrote:
> This patch adds device tree documentation for the sbs-manager
>
> Reviewed-by: Phil Reid <preid@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Karl-Heinz Schneider <karl-heinz@xxxxxxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/power/sbs,sbs-manager.txt | 58 ++++++++++++++++++++++
> 1 file changed, 58 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/power/sbs,sbs-manager.txt
>
> diff --git a/Documentation/devicetree/bindings/power/sbs,sbs-manager.txt b/Documentation/devicetree/bindings/power/sbs,sbs-manager.txt
> new file mode 100644
> index 0000000..d52b466
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/sbs,sbs-manager.txt
> @@ -0,0 +1,58 @@
> +Binding for sbs-manager
> +
> +Required properties:
> +- compatible: should be "sbs,sbs-manager" or "lltc,ltc1760" if device is a
> + ltc1760.
sbs is not a vendor. What chip is sbs-manager? I suspect you should drop
it and only list specific chips.
> +- reg: integer, i2c address of the device. Should be <0xa>.
> +
> +Optional properties:
> +- sbsm,i2c-retry-count: integer, number of retries for trying to read or write
> + to registers. Default: 1
Seems like a driver setting. Is having a retry in the driver a problem
if the h/w works and never actually needs it?
> +
> +From OS view the device is basically an i2c-mux used to communicate with up to
> +four smart battery devices at address 0xb. The driver actually implements this
> +behaviour. So standard i2c-mux nodes can be used to register up to four slave
> +batteries. Channels will be numerated as 1, 2, 4 and 8.
> +
> +Example:
> +
> +batman@0a {
> + compatible = "sbs,sbs-manager";
> + reg = <0x0a>;
> + sbsm,i2c-retry-count = <3>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + channel1@1 {
channel@1
Do we have a standard node name for mux nodes? If not, we should.
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <1>;
> +
> + battery1@0b {
battery@b
> + compatible = "sbs-battery";
This should be an actual battery model. Or all this information is
generic, you don't really need it in DT.
> + reg = <0x0b>;
> + };
> + };
> +
> + channel2@2 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <2>;
> +
> + battery2@0b {
> + compatible = "sbs-battery";
> + reg = <0x0b>;
> + };
> + };
> +
> + channel3@4 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <4>;
> +
> + battery3@0b {
> + compatible = "sbs-battery";
> + reg = <0x0b>;
> + };
> + };
> +};
> --
> 1.9.1
>
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