diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch b/target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch new file mode 100644 index 0000000..3aa4f79 --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0090-i2c-bcm2708-BCM270X_DT-Add-support-for-I2C2.patch @@ -0,0 +1,163 @@ +From 5130d7fdc237418537e377b951dd388723de1502 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Mon, 22 Jun 2015 14:23:03 +0100 +Subject: [PATCH 090/203] i2c-bcm2708/BCM270X_DT: Add support for I2C2 + +The third I2C bus (I2C2) is normally reserved for HDMI use. Careless +use of this bus can break an attached display - use with caution. + +It is recommended to disable accesses by VideoCore by setting +hdmi_ignore_edid=1 or hdmi_edid_file=1 in config.txt. + +The interface is disabled by default - enable using the +i2c2_iknowwhatimdoing DT parameter. +--- + arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 6 ++++++ + arch/arm/boot/dts/bcm2708-rpi-b.dts | 6 ++++++ + arch/arm/boot/dts/bcm2708-rpi-cm.dts | 6 ++++++ + arch/arm/boot/dts/bcm2708_common.dtsi | 14 ++++++++++++++ + arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 6 ++++++ + drivers/i2c/busses/i2c-bcm2708.c | 5 ++++- + 6 files changed, 42 insertions(+), 1 deletion(-) + +--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts +@@ -75,6 +75,10 @@ + clock-frequency = <100000>; + }; + ++&i2c2 { ++ clock-frequency = <100000>; ++}; ++ + &i2s { + #sound-dai-cells = <0>; + pinctrl-names = "default"; +@@ -103,8 +107,10 @@ + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; + i2c1 = <&i2c1>,"status"; ++ i2c2_iknowwhatimdoing = <&i2c2>,"status"; + i2c0_baudrate = <&i2c0>,"clock-frequency:0"; + i2c1_baudrate = <&i2c1>,"clock-frequency:0"; ++ i2c2_baudrate = <&i2c2>,"clock-frequency:0"; + core_freq = <&clk_core>,"clock-frequency:0"; + + act_led_gpio = <&act_led>,"gpios:4"; +--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts +@@ -75,6 +75,10 @@ + clock-frequency = <100000>; + }; + ++&i2c2 { ++ clock-frequency = <100000>; ++}; ++ + &i2s { + #sound-dai-cells = <0>; + pinctrl-names = "default"; +@@ -97,8 +101,10 @@ + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; + i2c1 = <&i2c1>,"status"; ++ i2c2_iknowwhatimdoing = <&i2c2>,"status"; + i2c0_baudrate = <&i2c0>,"clock-frequency:0"; + i2c1_baudrate = <&i2c1>,"clock-frequency:0"; ++ i2c2_baudrate = <&i2c2>,"clock-frequency:0"; + core_freq = <&clk_core>,"clock-frequency:0"; + + act_led_gpio = <&act_led>,"gpios:4"; +--- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts +@@ -65,6 +65,10 @@ + clock-frequency = <100000>; + }; + ++&i2c2 { ++ clock-frequency = <100000>; ++}; ++ + &i2s { + #sound-dai-cells = <0>; + pinctrl-names = "default"; +@@ -79,8 +83,10 @@ + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; + i2c1 = <&i2c1>,"status"; ++ i2c2_iknowwhatimdoing = <&i2c2>,"status"; + i2c0_baudrate = <&i2c0>,"clock-frequency:0"; + i2c1_baudrate = <&i2c1>,"clock-frequency:0"; ++ i2c2_baudrate = <&i2c2>,"clock-frequency:0"; + core_freq = <&clk_core>,"clock-frequency:0"; + }; + }; +--- a/arch/arm/boot/dts/bcm2708_common.dtsi ++++ b/arch/arm/boot/dts/bcm2708_common.dtsi +@@ -20,6 +20,7 @@ + uart1 = &uart1; + mmc = &mmc; + i2c1 = &i2c1; ++ i2c2 = &i2c2; + usb = &usb; + leds = &leds; + fb = &fb; +@@ -179,6 +180,19 @@ + interrupts = <2 21>; + clocks = <&clk_i2c>; + #address-cells = <1>; ++ #size-cells = <0>; ++ status = "disabled"; ++ }; ++ ++ i2c2: i2c@7e805000 { ++ // Beware - this is shared with the HDMI module. ++ // Careless use may break (really) your display. ++ // Caveat emptor. ++ compatible = "brcm,bcm2708-i2c"; ++ reg = <0x7e805000 0x1000>; ++ interrupts = <2 21>; ++ clocks = <&clk_i2c>; ++ #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; +--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts ++++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts +@@ -75,6 +75,10 @@ + clock-frequency = <100000>; + }; + ++&i2c2 { ++ clock-frequency = <100000>; ++}; ++ + &i2s { + #sound-dai-cells = <0>; + pinctrl-names = "default"; +@@ -103,8 +107,10 @@ + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; + i2c1 = <&i2c1>,"status"; ++ i2c2_iknowwhatimdoing = <&i2c2>,"status"; + i2c0_baudrate = <&i2c0>,"clock-frequency:0"; + i2c1_baudrate = <&i2c1>,"clock-frequency:0"; ++ i2c2_baudrate = <&i2c2>,"clock-frequency:0"; + core_freq = <&clk_core>,"clock-frequency:0"; + + act_led_gpio = <&act_led>,"gpios:4"; +--- a/drivers/i2c/busses/i2c-bcm2708.c ++++ b/drivers/i2c/busses/i2c-bcm2708.c +@@ -407,8 +407,11 @@ static int bcm2708_i2c_probe(struct plat + case 1: + adap->class = I2C_CLASS_DDC; + break; ++ case 2: ++ adap->class = I2C_CLASS_DDC; ++ break; + default: +- dev_err(&pdev->dev, "can only bind to BSC 0 or 1\n"); ++ dev_err(&pdev->dev, "can only bind to BSC 0, 1 or 2\n"); + err = -ENXIO; + goto out_free_bi; + } |