On Thu, 2017-01-05 at 12:13 +0000, Luis Oliveira wrote:
> On 28-Dec-16 18:10, Luis Oliveira wrote:
> > On 28-Dec-16 17:10, Andy Shevchenko wrote:
> > > On Wed, 2016-12-28 at 16:41 +0000, Luis Oliveira wrote:
> > > > On 28-Dec-16 16:31, Andy Shevchenko wrote:
> > > So, ACPI has a property to support slave mode for I2CSerialBus()
> > > macro.
> > >
> > > I would propose to create a helper function in i2c-core.c which
> > > will be
> > > responsible for mode detection
> > >
> > > ... i2c_slave_mode_detect()
> > > {
> > > ...
> > > if (IS_BUILTIN(CONFIG_OF) && dev->of_node) {
> > > ... (use of_*() here) ...
> > > } else if (IS_BUILTIN(CONFIG_ACPI) && ACPI_HANDLE(dev))
> > > dev_dbg(..., "ACPI slave is not supported yet\n");
> > > ... to master ...
> > > } else {
> > > ... default to master ...
> > > }
> > > }
> > > EXPORT_...();
> > >
> > > Make it as a separate patch.
> > >
> >
> > Oh I see, yes it looks good. I will check it. Thanks
> >
>
> Hi Andy,
>
> I implemented a helper function as you proposed and it looks like
> this:
>
> int i2c_slave_mode_detect(struct device *dev)
> {
> struct device_node *child;
> u32 reg;
>
> if (IS_BUILTIN(CONFIG_OF) && dev->of_node) {
> for_each_child_of_node(dev->of_node, child) {
> of_property_read_u32(child, "reg", ®);
> if (reg & I2C_OWN_SLAVE_ADDRESS)
> return 1;
> }
> } else if (IS_BUILTIN(CONFIG_ACPI) && ACPI_HANDLE(dev))
> dev_dbg(dev, "ACPI slave is not supported yet\n");
Curly braces here as well.
> else
> return 0;
For now this is not needed
> return 0;
> }
>
> Before I submit the patch to the i2c-core.c I wonder if I could have
> some
> comment on the implementation.
Glad you did it. See above. Otherwise looks good to me.
--
Andy Shevchenko <[email protected]>
Intel Finland Oy
