Hi Nathan, Warner,

first, I had the feeling that I have to provide a fast solution which makes PowerMacs usable again. I am aware that the committed version doesn't win a prize.

Also, I didn't know that we have AIM & FDT, Nathan which one?

On 05.11.15 21:26, Warner Losh wrote:
I'd suggested that this be driven off a global quirk like

u_int fdt_quirks;
#define FDT_QUIRK_8BIT_IIC_ADDR 1
...

In openfirm.h?

if (fdt_quirks & FDT_QUIRK_8BIT_IIC_ADDR)
dinfo->opd_dinfo.addr = paddr;
else
dinfo->opd_dinfo.addr = paddr << 1;

And the platform code, whatever that means, would set it when it "knows"
this is the case.

If I get that right, I'd have to set the fdt_quirk in each I2C parent, like kiic.c and smu.c?

On Thu, Nov 5, 2015 at 12:56 PM, Nathan Whitehorn
<nwhiteh...@freebsd.org <mailto:nwhiteh...@freebsd.org>> wrote:

    I'm not sure this is the best way to do this: we have AIM systems
    that use FDT, for example. Can we make it a quirk in the host-bus
    driver? Or do a run-time check to see if the root node has MacRISC
    in its compatible property?

The 'compatible property' approach would be limited/isolated to one file (ofw_iicbus.c) in comparison to the quirk approach where I'd have to adapt at least (known now) four files.

I can go either way, just my thoughts.

Andreas
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