linux-kernel - [PATCH v6 01/14] dt/bindings: Document pinctrl-ingenic

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Date:   Fri, 12 May 2017 18:52:54 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        Ralf Baechle <ralf@...ux-mips.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mips@...ux-mips.org,
        Maarten ter Huurne <maarten@...ewalker.org>,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v6 01/14] dt/bindings: Document pinctrl-ingenic

This commit adds documentation for the devicetree bindings of the
pinctrl-ingenic driver, which handles pin configuration and pin
muxing of the Ingenic SoCs currently supported by the Linux kernel.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
Acked-by: Rob Herring <robh@...nel.org>
---
 .../bindings/pinctrl/ingenic,pinctrl.txt           | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt

 v2: Rewrote the documentation for the new pinctrl-ingenic driver
 v3: No changes
 v4: Update for the v4 version of the pinctrl-ingenic driver
 v5: Rename 'ingenic-pinctrl@...' to 'pin-controller@...' in example
 v6: No changes

diff --git a/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt
new file mode 100644
index 000000000000..ca313a7aeaff
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/ingenic,pinctrl.txt
@@ -0,0 +1,41 @@
+Ingenic jz47xx pin controller
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+For the jz47xx SoCs, pin control is tightly bound with GPIO ports. All pins may
+be used as GPIOs, multiplexed device functions are configured within the
+GPIO port configuration registers and it is typical to refer to pins using the
+naming scheme "PxN" where x is a character identifying the GPIO port with
+which the pin is associated and N is an integer from 0 to 31 identifying the
+pin within that GPIO port. For example PA0 is the first pin in GPIO port A, and
+PB31 is the last pin in GPIO port B. The jz4740 contains 4 GPIO ports, PA to
+PD, for a total of 128 pins. The jz4780 contains 6 GPIO ports, PA to PF, for a
+total of 192 pins.
+
+
+Required properties:
+--------------------
+
+ - compatible: One of:
+    - "ingenic,jz4740-pinctrl"
+    - "ingenic,jz4770-pinctrl"
+    - "ingenic,jz4780-pinctrl"
+ - reg: Address range of the pinctrl registers.
+
+
+GPIO sub-nodes
+--------------
+
+The pinctrl node can have optional sub-nodes for the Ingenic GPIO driver;
+please refer to ../gpio/ingenic,gpio.txt.
+
+
+Example:
+--------
+
+pinctrl: pin-controller@...10000 {
+	compatible = "ingenic,jz4740-pinctrl";
+	reg = <0x10010000 0x400>;
+};
-- 
2.11.0