On Thursday, August 9, 2018 2:08:41 PM CEST Hans de Goede wrote: > Hi, > > On 09-08-18 13:55, Rafael J. Wysocki wrote: > > On Thu, Aug 9, 2018 at 1:40 PM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > >> On systems with ACPI instantiated i2c-clients, normally there is 1 fw_node > >> per i2c-device and that fw-node contains 1 I2cSerialBus resource for that 1 > >> i2c-device. > >> > >> But in some rare cases the manufacturer has decided to describe multiple > >> i2c-devices in a single ACPI fwnode with multiple I2cSerialBus resources. > >> > >> An earlier attempt to fix this in the i2c-core resulted in a lot of extra > >> code to support this corner-case. > >> > >> This commit introduces a new i2c-multi-instantiate driver which fixes this > >> in a different way. This new driver can be built as a module which will > >> only loaded on affected systems. > >> > >> This driver will instantiate a new i2c-client per I2cSerialBus resource, > >> using the driver_data from the acpi_device_id it is binding to to tell it > >> which chip-type (and optional irq-resource) to use when instantiating. > >> > >> Note this driver depends on a platform device being instantiated for the > >> ACPI fwnode, see the i2c_multi_instantiate_ids list of ACPI device-ids in > >> drivers/acpi/scan.c: acpi_device_enumeration_by_parent(). > >> > >> Acked-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> > >> Acked-by: Wolfram Sang <wsa@xxxxxxxxxxxxx> > >> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> > >> --- > >> Changes in v2: > >> -Rebase on top of 4.18-rc2 > >> > >> Changes in v3: > >> -Change from an i2c-driver using a hack to allow having multiple i2c clients > >> at the same address to a platform-driver > >> > >> Changes in v4: > >> -Tweak MAINTAINERS entry a bit > >> > >> Changes in v5: > >> -s/no_clients/num_clients/ > >> -Change patch Subject prefix to platform/x86 > >> > >> Changes in v6: > >> -s/irq_idx/gpio_irq_idx/ > > > > And this is the only patch that has changed in v6, right? > > Correct. > > > Anyway, if you have further updates on top of this series, please send > > them as incremental patches. > > Ok, will do. The series has been applied, thanks!
