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9dbd9dbed7
These properties are common for all i2c subnodes. Allows to add i2c device
nodes (like an rtc for example) in other .dts files including
sam9x60.dtsi without requiring to repeat these properties for each i2c
device again and again.
Found on a custom board after adding this in .dts:
&flx5 {
atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
status = "okay";
i2c5: i2c@600 {
pinctrl-0 = <&pinctrl_flx5_default>;
status = "okay";
pcf8523: rtc@68 {
compatible = "nxp,pcf8523";
reg = <0x68>;
};
};
};
… which created a warning like this:
[…]:236.4-17: Warning (reg_format): /ahb/apb/flexcom@f0004000/i2c@600/rtc@68:reg: property has invalid length (4 bytes) (#address-cells == 2, #size-cells == 1)
[…]: Warning (pci_device_reg): Failed prerequisite 'reg_format'
[…]: Warning (pci_device_bus_num): Failed prerequisite 'reg_format'
[…]: Warning (simple_bus_reg): Failed prerequisite 'reg_format'
[…]/linux-6.6.25/arch/arm/boot/dts/microchip/sam9x60.dtsi:283.19-299.7: Warning (i2c_bus_bridge): /ahb/apb/flexcom@f0004000/i2c@600: incorrect #address-cells for I2C bus also defined at […]:228.16-238.4
[…]/linux-6.6.25/arch/arm/boot/dts/microchip/sam9x60.dtsi:283.19-299.7: Warning (i2c_bus_bridge): /ahb/apb/flexcom@f0004000/i2c@600: incorrect #size-cells for I2C bus also defined at […]:228.16-238.4
[…]: Warning (i2c_bus_reg): Failed prerequisite 'reg_format'
[…]: Warning (i2c_bus_reg): Failed prerequisite 'i2c_bus_bridge'
[…]: Warning (spi_bus_reg): Failed prerequisite 'reg_format'
[…]:234.19-237.5: Warning (avoid_default_addr_size): /ahb/apb/flexcom@f0004000/i2c@600/rtc@68: Relying on default #address-cells value
[…]:234.19-237.5: Warning (avoid_default_addr_size): /ahb/apb/flexcom@f0004000/i2c@600/rtc@68: Relying on default #size-cells value
[…]: Warning (avoid_unnecessary_addr_size): Failed prerequisite 'avoid_default_addr_size'
[…]: Warning (unique_unit_address): Failed prerequisite 'avoid_default_addr_size'
This probably should have been done with commit
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.