From mboxrd@z Thu Jan 1 00:00:00 1970 From: magnus.damm@gmail.com (Magnus Damm) Date: Tue, 17 Dec 2013 14:03:24 +0900 Subject: [PATCH 04/04 v2] ARM: shmobile: Genmai I2C-over-GPIO support In-Reply-To: <20131217050232.727.9552.sendpatchset@w520> References: <20131217050232.727.9552.sendpatchset@w520> Message-ID: <20131217050324.727.61701.sendpatchset@w520> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Magnus Damm 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 --- Changes since V1: - Use compatible string "renesas,12c128" and set pagesize, thanks Wolfram! - Use "flash at 50", thanks Sergei! arch/arm/boot/dts/r7s72100-genmai-reference.dts | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) --- 0011/arch/arm/boot/dts/r7s72100-genmai-reference.dts +++ work/arch/arm/boot/dts/r7s72100-genmai-reference.dts 2013-12-16 20:08:48.000000000 +0900 @@ -39,6 +39,24 @@ 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>; + + flash at 50 { + compatible = "renesas,24c128"; + reg = <0x50>; + pagesize = <64>; + }; + }; }; &pfc {