On Mon, Jan 23, 2017 at 6:08 PM, Dan O'Donovan <dan@xxxxxxxxxx> wrote:
> (Re-submitting this patch set originally created by Leonard Crestez,
> possibly abandoned by Leonard due to a change in employment)
>
> When using devicetree, stuff like i2c_client.name or spi_device.modalias
> is initialized to the first DT compatible id with the vendor prefix
> stripped. Since some drivers rely on this in order to differentiate between
> hardware variants try to replicate it when using ACPI with DT ids.
>
> This also makes it so that the i2c_device_id parameter passed to probe is
> non-NULL when matching with ACPI and DT ids.
>
> Tested using ACPI overlays but there is no actual dependency. This series
> just extends the PRP0001 feature to be more useful for I2C/SPI.
>
> The patches only touches the ACPI-specific parts of the i2c and spi core.
The series looks good. Few nitpicks in the comments of corresponding
patches though.
FWIW:
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
>
> Here is an example .dsl for an SPI accelerometer connected to minnowboard max:
>
> Device (ACCL)
> {
> Name (_ADR, Zero)
> Name (_HID, "PRP0001")
> Name (_UID, One)
>
> Method (_CRS, 0, Serialized)
> {
> Name (RBUF, ResourceTemplate ()
> {
> SPISerialBus(1, PolarityLow, FourWireMode, 16,
> ControllerInitiated, 1000000, ClockPolarityLow,
> ClockPhaseFirst, "\\_SB.SPI1",)
> GpioInt (Edge, ActiveHigh, Exclusive, PullDown, 0x0000,
> "\\_SB.GPO2", 0x00, ResourceConsumer, , )
> { // Pin list
> 1
> }
> })
> Return (RBUF)
> }
> Name (_DSD, Package ()
> {
> ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
> Package ()
> {
> Package () {"compatible", "st,lis3dh"},
> }
> })
> }
>
> Link to v2: https://lkml.org/lkml/2016/7/13/392
> Changes:
> * Use appropriate subject prefix for each subsystem (Mark Brown)
> * Use ACPI info as before if getting OF info fails (Mark Brown)
> * Minor cosmetic/readability improvements (Rafael J. Wysocki)
>
> Link to v1: https://www.spinics.net/lists/linux-acpi/msg66469.html
> Changes:
> * Rebase on after acpi overlays got it.
> * Change acpi_of_modalias outlen param to size_t
> * Use {} after else
>
> Crestez Dan Leonard (3):
> ACPI / bus: Export acpi_of_modalias equiv of of_modalias_node
> i2c: acpi: Initialize info.type from of_compatible
> spi: acpi: Initialize modalias from of_compatible
>
> drivers/acpi/bus.c | 35 +++++++++++++++++++++++++++++++++++
> drivers/i2c/i2c-core.c | 8 +++++++-
> drivers/spi/spi.c | 10 +++++++++-
> include/acpi/acpi_bus.h | 1 +
> 4 files changed, 52 insertions(+), 2 deletions(-)
>
> --
> 2.7.4
>
--
With Best Regards,
Andy Shevchenko
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