[PATCH 03/04] ARM: shmobile: Genmai I2C-over-GPIO support
Magnus Damm
magnus.damm at gmail.com
Wed Nov 27 03:28:05 EST 2013
From: Magnus Damm <damm at opensource.se>
Add support for the Genmai I2C bus hooked up to P1_5 and P1_4 using
the i2c-gpio driver. On the bus sits a 24c128 EEPRROM.
Signed-off-by: Magnus Damm <damm at opensource.se>
---
arch/arm/boot/dts/r7s72100-genmai-reference.dts | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
--- 0008/arch/arm/boot/dts/r7s72100-genmai-reference.dts
+++ work/arch/arm/boot/dts/r7s72100-genmai-reference.dts 2013-11-27 15:51:31.000000000 +0900
@@ -39,4 +39,22 @@
gpios = <&port4 11 GPIO_ACTIVE_LOW>;
};
};
+
+ i2c at 0 {
+ compatible = "i2c-gpio";
+ gpios = <&port1 5 GPIO_ACTIVE_HIGH /* sda */
+ &port1 4 GPIO_ACTIVE_HIGH /* scl */
+ >;
+ i2c-gpio,sda-open-drain;
+ i2c-gpio,scl-open-drain;
+ i2c-gpio,delay-us = <5>; /* ~100 kHz */
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom: 24c128 at 50 {
+ compatible = "at,24c128";
+ reg = <0x50>;
+ };
+ };
+
};
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