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From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-renesas-soc@vger.kernel.org
Cc: Simon Horman <horms@verge.net.au>,
	Magnus Damm <magnus.damm@gmail.com>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Simon Horman <horms+renesas@verge.net.au>
Subject: [PATCH v2 4/9] ARM: dts: koelsch: use demuxer for I2C4
Date: Sun, 31 Dec 2017 12:23:15 +0100	[thread overview]
Message-ID: <20171231112320.3461-5-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20171231112320.3461-1-wsa+renesas@sang-engineering.com>

Make it possible to fallback to GPIO for I2C4 on the EXIO-E connector.

This is based on reference work for the I2C0 core of the lager/r8a7790
by Wolfram Sang.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOS, fixed pinmux for I2C4]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Change since V1:
* fixed pinmux group for I2C4

 arch/arm/boot/dts/r8a7791-koelsch.dts | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts
index 4b20db197de629..f40321a1c917e7 100644
--- a/arch/arm/boot/dts/r8a7791-koelsch.dts
+++ b/arch/arm/boot/dts/r8a7791-koelsch.dts
@@ -52,8 +52,10 @@
 		serial1 = &scif1;
 		i2c9 = &gpioi2c1;
 		i2c10 = &gpioi2c2;
+		i2c11 = &gpioi2c4;
 		i2c12 = &i2cexio1;
 		i2c13 = &i2chdmi;
+		i2c14 = &i2cexio4;
 	};
 
 	chosen {
@@ -329,6 +331,16 @@
 		i2c-gpio,delay-us = <5>;
 	};
 
+	gpioi2c4: i2c-11 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "i2c-gpio";
+		status = "disabled";
+		scl-gpios = <&gpio7 13 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		sda-gpios = <&gpio7 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+		i2c-gpio,delay-us = <5>;
+	};
+
 	/*
 	 * I2C1 is routed to EXIO connector B, pins 64 (SCL) + 66 (SDA).
 	 * A fallback to GPIO is provided.
@@ -437,6 +449,18 @@
 			pagesize = <16>;
 		};
 	};
+
+	/*
+	 * I2C4 is routed to EXIO connector E, pins 37 (SCL) + 39 (SDA).
+	 * A fallback to GPIO is provided.
+	 */
+	i2cexio4: i2c-14 {
+		compatible = "i2c-demux-pinctrl";
+		i2c-parent = <&i2c4>, <&gpioi2c4>;
+		i2c-bus-name = "i2c-exio4";
+		#address-cells = <1>;
+		#size-cells = <0>;
+	};
 };
 
 &du {
@@ -480,6 +504,11 @@
 		function = "i2c2";
 	};
 
+	i2c4_pins: i2c4 {
+		groups = "i2c4_c";
+		function = "i2c4";
+	};
+
 	du_pins: du {
 		groups = "du_rgb888", "du_sync", "du_disp", "du_clk_out_0";
 		function = "du";
@@ -735,6 +764,11 @@
 	clock-frequency = <100000>;
 };
 
+&i2c4 {
+	pinctrl-0 = <&i2c4_pins>;
+	pinctrl-names = "i2c-exio4";
+};
+
 &i2c6 {
 	status = "okay";
 	clock-frequency = <100000>;
-- 
2.11.0

  parent reply	other threads:[~2017-12-31 11:23 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-31 11:23 [PATCH v2 0/9] ARM: dts: gen2: add IP core switcher for all busses Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 1/9] ARM: dts: lager: use demuxer for IIC2/I2C2 Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 2/9] ARM: dts: lager: use demuxer for IIC3/I2C3 Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 3/9] ARM: dts: koelsch: use demuxer for I2C2 Wolfram Sang
2017-12-31 11:23 ` Wolfram Sang [this message]
2017-12-31 11:23 ` [PATCH v2 5/9] ARM: dts: porter: " Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 6/9] ARM: dts: alt: use demuxer for I2C1 Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 7/9] ARM: dts: silk: " Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 8/9] ARM: dts: gose: use demuxer for I2C2 Wolfram Sang
2017-12-31 11:23 ` [PATCH v2 9/9] ARM: dts: gose: use demuxer for I2C4 Wolfram Sang
2018-01-02 21:58 ` [PATCH v2 0/9] ARM: dts: gen2: add IP core switcher for all busses Niklas Söderlund
2018-01-02 22:28   ` Wolfram Sang
2018-01-30 10:51 ` Wolfram Sang
2018-01-30 16:45   ` Simon Horman

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