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| author | Stefan Binding <sbinding@opensource.cirrus.com> | 2022-01-21 20:24:29 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2022-02-02 20:10:02 +0300 |
| commit | 68f201f9061c000d7a4a9f359f021b1cd535d62b (patch) | |
| tree | 61b0c265da14974de51905cddb778bf65737a9bd /drivers/platform/x86/Kconfig | |
| parent | 35a36cbb7b1ce7596fc03962f7ce261b2e908d1f (diff) | |
| download | linux-68f201f9061c000d7a4a9f359f021b1cd535d62b.tar.xz | |
platform/x86: serial-multi-instantiate: Add SPI support
Add support for spi bus in serial-multi-instantiate driver
Some peripherals can have either a I2C or a SPI connection
to the host (but not both) but use the same HID for both
types. So it is not possible to use the HID to determine
whether it is I2C or SPI. The driver must check the node
to see if it contains I2cSerialBus or SpiSerialBus entries.
For backwards-compatibility with the existing nodes I2C is
checked first and if such entries are found ONLY I2C devices
are created. Since some existing nodes that were already
handled by this driver could also contain unrelated
SpiSerialBus nodes that were previously ignored, and this
preserves that behavior. If there is ever a need to handle
a node where both I2C and SPI devices must be instantiated
this can be added in future.
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220121172431.6876-8-sbinding@opensource.cirrus.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/Kconfig')
| -rw-r--r-- | drivers/platform/x86/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 2e656909a866..8d1eec208854 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -992,7 +992,7 @@ config TOPSTAR_LAPTOP config SERIAL_MULTI_INSTANTIATE tristate "Serial bus multi instantiate pseudo device driver" - depends on I2C && ACPI + depends on I2C && SPI && ACPI help Some ACPI-based systems list multiple devices in a single ACPI firmware-node. This driver will instantiate separate clients |