Re: [PATCH 1/2] dt-bindings: iio: afe: add binding for adi,lt6106

2018-04-16 Thread Rob Herring 
On Wed, Apr 11, 2018 at 04:15:54PM +0200, Peter Rosin wrote:
> This is a current sense amplifier from Analog Devices.
> 
> Signed-off-by: Peter Rosin 
> ---
>  .../devicetree/bindings/iio/afe/adi,lt6106.txt | 50 
> ++
>  MAINTAINERS|  1 +
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt 
> b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> new file mode 100644
> index ..98b6d93596f2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> @@ -0,0 +1,50 @@
> +LT6106 36V High Side Current Sence Amplifier
> +
> +
> +This binding assumes the typical application of the current sense amplifier
> +as described in the LT6106 datasheet.
> +
> +http://www.analog.com/media/en/technical-documentation/data-sheets/6106fb.pdf
> +
> + .--.
> +Vin +--+-|Rsense|-+-.
> +|  | '--' | |
> +|  |  |   .---.
> + ..  .---.|   | L |
> + |  V+|  |Rin||   | O |
> + ||  '---'|   | A |
> + |||  |   | D |
> + |-IN |'  |   '---'
> +Vout ---+| OUT   LT6106   |   | |
> +||+IN |---'GND
> + ..  ||
> + |Rout|  ||
> + ''  |  V-|
> +|''
> +|   |
> +   GND GND
> +
> +The voltage Vsense over Rsense is measured by looking at Vout. They
> +are related as Vout = Vsense * Rout / Rin. The current Isense through
> +Rsense is (almost) the same as that through the LOAD. Hence, the
> +interesting LOAD current can be calculated as
> +
> + Vout * Rin / (Rout * Rsense)
> +
> +Required properties:
> +- compatible : "adi,lt6106"
> +- io-channels : Channel node of an io-channel measuring Vout.
> +- sense-resistor-micro-ohms : The Rsense resistance in microohms.

> +- input-resistor-ohms : The Rin resistance in ohms.
> +- output-resistor-ohms : The Rout resistance in ohms.

Are these generic or specific to this binding? For the latter, they 
shoudl have vendor prefix.

> +
> +Example:
> +
> +sysi {
> + compatible = "adi,lt6106";
> + io-channels = < 0>;
> +
> + sense-resistor-micro-ohms = <2>;
> + input-resistor-ohms = <200>;
> + output-resistor-ohms = <1>;
> +};

Re: [PATCH 1/2] dt-bindings: iio: afe: add binding for adi,lt6106

2018-04-16 Thread Rob Herring 
On Wed, Apr 11, 2018 at 04:15:54PM +0200, Peter Rosin wrote:
> This is a current sense amplifier from Analog Devices.
> 
> Signed-off-by: Peter Rosin 
> ---
>  .../devicetree/bindings/iio/afe/adi,lt6106.txt | 50 
> ++
>  MAINTAINERS|  1 +
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> 
> diff --git a/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt 
> b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> new file mode 100644
> index ..98b6d93596f2
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
> @@ -0,0 +1,50 @@
> +LT6106 36V High Side Current Sence Amplifier
> +
> +
> +This binding assumes the typical application of the current sense amplifier
> +as described in the LT6106 datasheet.
> +
> +http://www.analog.com/media/en/technical-documentation/data-sheets/6106fb.pdf
> +
> + .--.
> +Vin +--+-|Rsense|-+-.
> +|  | '--' | |
> +|  |  |   .---.
> + ..  .---.|   | L |
> + |  V+|  |Rin||   | O |
> + ||  '---'|   | A |
> + |||  |   | D |
> + |-IN |'  |   '---'
> +Vout ---+| OUT   LT6106   |   | |
> +||+IN |---'GND
> + ..  ||
> + |Rout|  ||
> + ''  |  V-|
> +|''
> +|   |
> +   GND GND
> +
> +The voltage Vsense over Rsense is measured by looking at Vout. They
> +are related as Vout = Vsense * Rout / Rin. The current Isense through
> +Rsense is (almost) the same as that through the LOAD. Hence, the
> +interesting LOAD current can be calculated as
> +
> + Vout * Rin / (Rout * Rsense)
> +
> +Required properties:
> +- compatible : "adi,lt6106"
> +- io-channels : Channel node of an io-channel measuring Vout.
> +- sense-resistor-micro-ohms : The Rsense resistance in microohms.

> +- input-resistor-ohms : The Rin resistance in ohms.
> +- output-resistor-ohms : The Rout resistance in ohms.

Are these generic or specific to this binding? For the latter, they 
shoudl have vendor prefix.

> +
> +Example:
> +
> +sysi {
> + compatible = "adi,lt6106";
> + io-channels = < 0>;
> +
> + sense-resistor-micro-ohms = <2>;
> + input-resistor-ohms = <200>;
> + output-resistor-ohms = <1>;
> +};

[PATCH 1/2] dt-bindings: iio: afe: add binding for adi,lt6106

2018-04-11 Thread Peter Rosin 
This is a current sense amplifier from Analog Devices.

Signed-off-by: Peter Rosin 
---
 .../devicetree/bindings/iio/afe/adi,lt6106.txt | 50 ++
 MAINTAINERS|  1 +
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt

diff --git a/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt 
b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
new file mode 100644
index ..98b6d93596f2
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
@@ -0,0 +1,50 @@
+LT6106 36V High Side Current Sence Amplifier
+
+
+This binding assumes the typical application of the current sense amplifier
+as described in the LT6106 datasheet.
+
+http://www.analog.com/media/en/technical-documentation/data-sheets/6106fb.pdf
+
+ .--.
+Vin +--+-|Rsense|-+-.
+|  | '--' | |
+|  |  |   .---.
+ ..  .---.|   | L |
+ |  V+|  |Rin||   | O |
+ ||  '---'|   | A |
+ |||  |   | D |
+ |-IN |'  |   '---'
+Vout ---+| OUT   LT6106   |   | |
+||+IN |---'GND
+ ..  ||
+ |Rout|  ||
+ ''  |  V-|
+|''
+|   |
+   GND GND
+
+The voltage Vsense over Rsense is measured by looking at Vout. They
+are related as Vout = Vsense * Rout / Rin. The current Isense through
+Rsense is (almost) the same as that through the LOAD. Hence, the
+interesting LOAD current can be calculated as
+
+ Vout * Rin / (Rout * Rsense)
+
+Required properties:
+- compatible : "adi,lt6106"
+- io-channels : Channel node of an io-channel measuring Vout.
+- sense-resistor-micro-ohms : The Rsense resistance in microohms.
+- input-resistor-ohms : The Rin resistance in ohms.
+- output-resistor-ohms : The Rout resistance in ohms.
+
+Example:
+
+sysi {
+   compatible = "adi,lt6106";
+   io-channels = < 0>;
+
+   sense-resistor-micro-ohms = <2>;
+   input-resistor-ohms = <200>;
+   output-resistor-ohms = <1>;
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index 21368749f3b0..76d1e03f350a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6893,6 +6893,7 @@ IIO UNIT CONVERTER
 M: Peter Rosin 
 L: linux-...@vger.kernel.org
 S: Maintained
+F: Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
 F: Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt
 F: Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
 F: drivers/iio/afe/iio-unit-converter.c
-- 
2.11.0

[PATCH 1/2] dt-bindings: iio: afe: add binding for adi,lt6106

2018-04-11 Thread Peter Rosin 
This is a current sense amplifier from Analog Devices.

Signed-off-by: Peter Rosin 
---
 .../devicetree/bindings/iio/afe/adi,lt6106.txt | 50 ++
 MAINTAINERS|  1 +
 2 files changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt

diff --git a/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt 
b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
new file mode 100644
index ..98b6d93596f2
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
@@ -0,0 +1,50 @@
+LT6106 36V High Side Current Sence Amplifier
+
+
+This binding assumes the typical application of the current sense amplifier
+as described in the LT6106 datasheet.
+
+http://www.analog.com/media/en/technical-documentation/data-sheets/6106fb.pdf
+
+ .--.
+Vin +--+-|Rsense|-+-.
+|  | '--' | |
+|  |  |   .---.
+ ..  .---.|   | L |
+ |  V+|  |Rin||   | O |
+ ||  '---'|   | A |
+ |||  |   | D |
+ |-IN |'  |   '---'
+Vout ---+| OUT   LT6106   |   | |
+||+IN |---'GND
+ ..  ||
+ |Rout|  ||
+ ''  |  V-|
+|''
+|   |
+   GND GND
+
+The voltage Vsense over Rsense is measured by looking at Vout. They
+are related as Vout = Vsense * Rout / Rin. The current Isense through
+Rsense is (almost) the same as that through the LOAD. Hence, the
+interesting LOAD current can be calculated as
+
+ Vout * Rin / (Rout * Rsense)
+
+Required properties:
+- compatible : "adi,lt6106"
+- io-channels : Channel node of an io-channel measuring Vout.
+- sense-resistor-micro-ohms : The Rsense resistance in microohms.
+- input-resistor-ohms : The Rin resistance in ohms.
+- output-resistor-ohms : The Rout resistance in ohms.
+
+Example:
+
+sysi {
+   compatible = "adi,lt6106";
+   io-channels = < 0>;
+
+   sense-resistor-micro-ohms = <2>;
+   input-resistor-ohms = <200>;
+   output-resistor-ohms = <1>;
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index 21368749f3b0..76d1e03f350a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6893,6 +6893,7 @@ IIO UNIT CONVERTER
 M: Peter Rosin 
 L: linux-...@vger.kernel.org
 S: Maintained
+F: Documentation/devicetree/bindings/iio/afe/adi,lt6106.txt
 F: Documentation/devicetree/bindings/iio/afe/current-sense-shunt.txt
 F: Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
 F: drivers/iio/afe/iio-unit-converter.c
-- 
2.11.0