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SubjectRe: [PATCH v2 2/3] hwmon: ltc2990: add devicetree binding
On Thu, Nov 17, 2016 at 01:10:15PM +0100, Tom Levens wrote:
> Add a devicetree binding for the ltc2990 hwmon driver.
>
> Signed-off-by: Tom Levens <tom.levens@cern.ch>
> ---
> .../devicetree/bindings/hwmon/ltc2990.txt | 28 ++++++++++++++++++++
> 1 files changed, 28 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/hwmon/ltc2990.txt
>
> diff --git a/Documentation/devicetree/bindings/hwmon/ltc2990.txt b/Documentation/devicetree/bindings/hwmon/ltc2990.txt
> new file mode 100644
> index 0000000..e4040e0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/hwmon/ltc2990.txt
> @@ -0,0 +1,28 @@
> +ltc2990
> +
> +Required properties:
> +- compatible: Must be "lltc,ltc2990"
> +- reg: I2C slave address
> +
> +Optional properties:
> +- lltc,mode:

What determines the mode? If this is something a user will want to
control, then it should be a sysfs attr rather than DT prop. If the
board design dictates then DT is the right place.

'mode' is a bit vague, 'lltc,meas-mode' perhaps.

> + Sets the chip's measurement mode, defaults to <6> if unset.
> +
> + The following measurements are available in each mode:
> +
> + 0: V1, V2, TR2
> + 1: V1-V2, TR2
> + 2: V1-V2, V3, V4
> + 3: TR1, V3, V4
> + 4: TR1, V3-V4
> + 5: TR1, TR2
> + 6: V1-V2, V3-V4
> + 7: V1, V2, V3, V4
> +
> +Example:
> +
> +ltc2990@4c {
> + compatible = "lltc,ltc2990";
> + reg = <0x4c>;
> + lltc,mode = <7>;
> +};
> --
> 1.7.1
>

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