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i2c-bus@0 twice?

DISCUSSION Johannes Berg 3 participants 3 messages Mar 16, 2006

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Johannes Berg

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johannes@quad:/proc/device-tree/ht@0,f2000000/pci@8/mac-io@7/i2c@18000$ ls
AAPL,address       built-in     i2c-bus@0         linux,phandle
AAPL,address-step  compatible   interrupt-parent  name
AAPL,i2c-rate      device_type  interrupts        reg
#address-cells     i2c-bus@0    linux,device      #size-cells

Somewhat odd that i2c-bus@0 exists twice :) Anyone have an explanation?

johannes

#1 lore raw
Quoted 7 lines · Johannes Berg
johannes@quad:/proc/device-tree/ht@0,f2000000/pci@8/mac-io@7/i2c@18000$ ls
AAPL,address       built-in     i2c-bus@0         linux,phandle
AAPL,address-step  compatible   interrupt-parent  name
AAPL,i2c-rate      device_type  interrupts        reg
#address-cells     i2c-bus@0    linux,device      #size-cells

Somewhat odd that i2c-bus@0 exists twice :) Anyone have an explanation?

Do you see it twice in OF also?

cheers

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Michael Ellerman
IBM OzLabs

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#2 lore raw
In reply to Johannes Berg
Quoted 7 lines · Johannes Berg
johannes@quad:/proc/device-tree/ht@0,f2000000/pci@8/mac-io@7/i2c@18000$ ls
AAPL,address       built-in     i2c-bus@0         linux,phandle
AAPL,address-step  compatible   interrupt-parent  name
AAPL,i2c-rate      device_type  interrupts        reg
#address-cells     i2c-bus@0    linux,device      #size-cells

Somewhat odd that i2c-bus@0 exists twice :) Anyone have an explanation?

It's a bug in OF on these machines. We need to workaround that, especially since only one of them contains all the useful infos

Ben