Hi David, On Thu, 21 May 2020 15:09:14 +1000 David Gibson <david@xxxxxxxxxxxxxxxxxxxxx> wrote: > > On Wed, May 20, 2020 at 05:21:34PM +0930, Joel Stanley wrote: > > dtc does a sanity check on reg properties that they are within the 10 > > bit address range for i2c slave addresses. In the case of multi-master > > buses the binding may describe an address that the bus will listen on as > > a device. Do not warn when this flag is set. > > > > This fixes the following build warnings reported by Stephen: > > > > arch/arm/boot/dts/aspeed-bmc-facebook-yosemitev2.dts:126.11-130.4: > > Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@80/ipmb1@10: > > I2C bus unit address format error, expected "40000010" > > arch/arm/boot/dts/aspeed-bmc-facebook-yosemitev2.dts:128.3-30: > > Warning (i2c_bus_reg): /ahb/apb/bus@1e78a000/i2c-bus@80/ipmb1@10:reg: > > I2C address must be less than 10-bits, got "0x40000010" > > > > Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx> > > Signed-off-by: Joel Stanley <joel@xxxxxxxxx> > > Any document you can give a pointer two explaining the special meaning > of this bit? include/dt-bindings/i2c/i2c.h Is Documentation/devicetree/bindings/i2c/i2c.txt in the kernel tree sufficient? I2C_OWN_SLAVE_ADDRESS has been in there since the file was introduced in August 2015. The actual value has been in include/dt-bindings/i2c/i2c.h since the same time. -- Cheers, Stephen Rothwell
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