diff mbox

[RFC,v2,5/5] spmi: document the PMIC arbiter SPMI bindings

Message ID ea2d30d47cb54b4322231f5c319663ee9c996784.1377202730.git.joshc@codeaurora.org (mailing list archive)
State RFC
Headers show

Commit Message

Josh Cartwright Aug. 9, 2013, 8:37 p.m. UTC
Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
---
 .../bindings/spmi/qcom,spmi-pmic-arb.txt           | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt

Comments

Stephen Warren Aug. 23, 2013, 9:55 p.m. UTC | #1
On 08/09/2013 02:37 PM, Josh Cartwright wrote:

Patch description?

> diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt

> +Required properties:
> +- compatible : should be "qcom,spmi-pmic-arb".
> +- reg-names  : should be "core", "intr", "cnfg"

> +- reg : offset and length of the PMIC Arbiter Core register map.
> +- reg : offset and length of the PMIC Arbiter Interrupt controller register map.
> +- reg : offset and length of the PMIC Arbiter Configuration register map.

This seems like it's defining the "reg" property 3 times each with a
different meaning. It'd be better to say something like:

reg : register specifier. Must contain 3 entries, in the following
order: core registers, interrupt register, configuration registers.

> +	qcom,spmi@fc4c0000 {
...
> +		qcom,pm8841@4 {

Node names typically don't include a vendor prefix. For the first
instance above, I think just "spmi@fc4c0000" or even just "spmi" would
be appropriate here; the latter being best in the case where there's
only 1 SPMI controller and hence no need to include the unit address for
uniqueness.

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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
new file mode 100644
index 0000000..3965236
--- /dev/null
+++ b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
@@ -0,0 +1,36 @@ 
+Qualcomm SPMI Controller (PMIC Arbiter)
+
+The SPMI PMIC Arbiter is found on the Snapdragon 800 Series.  It is an SPMI
+controller with wrapping arbitration logic to allow for multiple on-chip
+devices to control a single SPMI master.
+
+See spmi.txt for the generic SPMI controller bindings.
+
+Required properties:
+- compatible : should be "qcom,spmi-pmic-arb".
+- reg-names  : should be "core", "intr", "cnfg"
+- reg : offset and length of the PMIC Arbiter Core register map.
+- reg : offset and length of the PMIC Arbiter Interrupt controller register map.
+- reg : offset and length of the PMIC Arbiter Configuration register map.
+- #address-cells : must be set to 1
+- #size-cells : must be set to 0
+
+Child nodes:
+
+Zero or more child nodes must be specified as per the spmi.txt document.
+
+Example:
+
+	qcom,spmi@fc4c0000 {
+		compatible = "qcom,spmi-pmic-arb";
+		reg-names = "core", "intr", "cnfg";
+		reg = <0xfc4cf000 0x1000>,
+		      <0Xfc4cb000 0x1000>,
+		      <0Xfc4ca000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		qcom,pm8841@4 {
+			reg = <0x4>;
+		};
+	};