linux-kernel - [PATCH v4 1/2] dt-bindings: i2c: npcm7xx: add binding for i2c controller

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Message-Id: <20180819203044.73286-2-tali.perry1@gmail.com>
Date:   Sun, 19 Aug 2018 23:30:43 +0300
From:   Tali Perry <tali.perry1@...il.com>
To:     tali.perry1@...il.com, avifishman70@...il.com, tmaimon77@...il.com,
        venture@...gle.com, yuenn@...gle.com, brendanhiggins@...gle.com,
        robh+dt@...nel.org, mark.rutland@....com, davem@...emloft.net,
        mchehab+samsung@...nel.org, gregkh@...uxfoundation.org,
        akpm@...ux-foundation.org, arnd@...db.de, wsa@...-dreams.de,
        andriy.shevchenko@...ux.intel.com, pierre-yves.mordret@...com,
        cedric.madianga@...il.com, baolin.wang@...eadtrum.com,
        jarkko.nikula@...ux.intel.com, hdegoede@...hat.com,
        rmk+kernel@...linux.org.uk, ard.biesheuvel@...aro.org,
        thor.thayer@...ux.intel.com, geert@...ux-m68k.org,
        heikki.krogerus@...ux.intel.com, tglx@...utronix.de
Cc:     linux-i2c@...r.kernel.org, openbmc@...ts.ozlabs.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 1/2] dt-bindings: i2c: npcm7xx: add binding for i2c controller


Nuvoton NPCM7XX I2C Controller
NPCM7xx includes 16 I2C controllers. This driver operates the controller.
This module also includes a slave mode, which will be submitted later on.

---
v4 -> v3:
	- typo on cover letter.

v3 -> v2:
	- fix dt binding: compatible name: omit "bus"

v2 -> v1:
	- run check patch in strict mode.
	- use linux crc.
	- define regs in constant offset without base.
	- remove debug prints.
	- no declarations for local functions.
	
v1: initial version

Signed-off-by: Tali Perry <tali.perry1@...il.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../devicetree/bindings/i2c/i2c-npcm7xx.txt        | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-npcm7xx.txt

diff --git a/Documentation/devicetree/bindings/i2c/i2c-npcm7xx.txt b/Documentation/devicetree/bindings/i2c/i2c-npcm7xx.txt
new file mode 100644
index 000000000000..0ecae950748b
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-npcm7xx.txt
@@ -0,0 +1,29 @@
+Nuvoton NPCM7XX I2C bus
+
+The NPCM750x includes sixteen I2C bus controllers. All Controllers support
+both master and slave mode. Each controller has two 16 byte HW FIFO for TX and
+RX.
+
+Required properties:
+- compatible      : must be "nuvoton,npcm750-i2c"
+- reg             : Offset and length of the register set for the device.
+- interrupts      : Contain the I2C interrupt with flags for falling edge.
+- clocks          : phandle of I2C reference clock.
+
+Optional:
+- bus-frequency   : Contain the I2C bus frequency,
+			the default I2C bus frequency is 100000.
+- pinctrl-0       : must be <&smbX_pins>, X is module number
+			(on NPCM7XX it's 0 to 15)
+- pinctrl-names   : should be set to "default"
+Example:
+
+	i2c0: i2c@...00 {
+		compatible = "nuvoton,npcm750-i2c";
+		reg = <0x80000 0x1000>;
+		clocks = <&clk NPCM7XX_CLK_APB2>;
+		bus-frequency = <100000>;
+		interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&smb0_pins>;
+	};
-- 
2.14.1