Difference between revisions of "i.MX53 SODIMM I2C"
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* i.MX53 SODIMM PC Module Basic: arch/arm/boot/dts/imx53-vmx53-779.dts | * i.MX53 SODIMM PC Module Basic: arch/arm/boot/dts/imx53-vmx53-779.dts | ||
<br /> | <br /> | ||
| − | '''''Note:''''' In most cases a single file edit is | + | '''''Note:''''' In most cases just a single file edit is needed. |
=== I2C bus speed adjustment === | === I2C bus speed adjustment === | ||
Revision as of 15:38, 3 April 2021
Modifying I2C bus speed
Locating configuration file
The initial CPU configuration is part the following device tree source file:
- arch/arm/boot/dts/imx53.dtsi
Shared module configuration can be found in the following file:
- arch/arm/boot/dts/imx53-vmx53.dtsi
The specific module configuration customised for i.MX53 SODIMM PC Module is part of these device tree source files:
- i.MX53 SODIMM PC Module Max: arch/arm/boot/dts/imx53-vmx53-557.dts
- i.MX53 SODIMM PC Module Pro: arch/arm/boot/dts/imx53-vmx53-668.dts
- i.MX53 SODIMM PC Module Basic: arch/arm/boot/dts/imx53-vmx53-779.dts
Note: In most cases just a single file edit is needed.
I2C bus speed adjustment
I2C speed: 50 kHz
&i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1_2>;
clock-frequency = <50000>;
status = "okay";
}
I2C speed: 100 kHz (Default)
&i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1_2>;
status = "okay";
}
I2C speed: 400 kHz
&i2c1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c1_2>;
clock-frequency = <400000>;
status = "okay";
}