Difference between revisions of "i.MX53 SODIMM I2C"
Jump to navigation
Jump to search
| (4 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | [[Category:i.MX53 SODIMM PC - Development | + | [[Category:i.MX53 SODIMM PC - Development Kit]] |
[[Category:i.MX53 SODIMM PC Peripherals]] | [[Category:i.MX53 SODIMM PC Peripherals]] | ||
<!-- --> | <!-- --> | ||
| Line 19: | Line 19: | ||
* 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 | + | '''''Note:''''' In most cases just a single file edit is needed to apply modifications. |
=== I2C bus speed adjustment === | === I2C bus speed adjustment === | ||
Latest revision as of 21:49, 23 October 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 to apply modifications.
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";
}