On Fri, 2017-03-17 at 10:55 +0100, Hans de Goede wrote: > Modify struct i2c_acpi_lookup and i2c_acpi_fill_info() to allow > using them to get the info from a certain index in the ACPI-resource > list rather then taking the first I2cSerialBus resource. > +Cc: Jarkko (our main I2C guy) > Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > --- > drivers/i2c/i2c-core.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c > index d2402bb..32b58fb 100644 > --- a/drivers/i2c/i2c-core.c > +++ b/drivers/i2c/i2c-core.c > @@ -112,6 +112,8 @@ struct i2c_acpi_lookup { > acpi_handle adapter_handle; > acpi_handle device_handle; > acpi_handle search_handle; > + int n; > + int index; > u32 speed; > u32 min_speed; > }; > @@ -123,6 +125,9 @@ static int i2c_acpi_fill_info(struct acpi_resource > *ares, void *data) > struct acpi_resource_i2c_serialbus *sb; > acpi_status status; > > + if (lookup->index != -1 && lookup->n++ != lookup->index) > + return 1; > + > if (info->addr || ares->type != > ACPI_RESOURCE_TYPE_SERIAL_BUS) > return 1; > > @@ -182,6 +187,7 @@ static int i2c_acpi_get_info(struct acpi_device > *adev, > > memset(&lookup, 0, sizeof(lookup)); > lookup.info = info; > + lookup.index = -1; > > ret = i2c_acpi_do_lookup(adev, &lookup); > if (ret) > @@ -328,6 +334,7 @@ u32 i2c_acpi_find_bus_speed(struct device *dev) > lookup.search_handle = ACPI_HANDLE(dev); > lookup.min_speed = UINT_MAX; > lookup.info = &dummy; > + lookup.index = -1; > > status = acpi_walk_namespace(ACPI_TYPE_DEVICE, > ACPI_ROOT_OBJECT, > I2C_ACPI_MAX_SCAN_DEPTH, -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html