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By default the i2c subsys creates an i2c-client for the first I2cSerialBus
resource of an acpi_device, but some acpi_devices have multiple
I2cSerialBus resources and we may want to instantiate i2c-clients for
the others.
This commit adds a new i2c_acpi_new_device function which can be used to
create an i2c-client for any I2cSerialBus resource of an acpi_device.
Note that the other resources may even be on a different i2c bus, so just
retrieving the client address is not enough.
Here is an example DSDT excerpt from such a device:
Device (WIDR)
{
Name (_HID, "INT33FE" /* XPOWER Battery Device */)
Name (_CID, "INT33FE" /* XPOWER Battery Device */)
Name (_DDN, "WC PMIC Battery Device")
<snip>
Name (RBUF, ResourceTemplate ()
{
I2cSerialBusV2 (0x005E, ControllerInitiated, 0x000186A0,
AddressingMode7Bit, "\\_SB.PCI0.I2C7",
0x00, ResourceConsumer, , Exclusive,
)
I2cSerialBusV2 (0x0036, ControllerInitiated, 0x000186A0,
AddressingMode7Bit, "\\_SB.PCI0.I2C1",
0x00, ResourceConsumer, , Exclusive,
)
I2cSerialBusV2 (0x0022, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.PCI0.I2C1",
0x00, ResourceConsumer, , Exclusive,
)
I2cSerialBusV2 (0x0054, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.PCI0.I2C1",
0x00, ResourceConsumer, , Exclusive,
)
GpioInt (Level, ActiveLow, Exclusive, PullNone, 0x0000,
"\\_SB.PCI0.I2C7.PMI5", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0012
}
GpioInt (Edge, ActiveLow, ExclusiveAndWake, PullNone, 0x0000,
"\\_SB.GPO1", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0005
}
GpioInt (Level, ActiveLow, Exclusive, PullNone, 0x0000,
"\\_SB.PCI0.I2C7.PMI5", 0x00, ResourceConsumer, ,
)
{ // Pin list
0x0013
}
})
Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
{
Return (RBUF) /* \_SB_.PCI0.I2C7.WIDR.RBUF */
}
<snip>
}
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
|
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|---|---|---|
| .. | ||
| algos | ||
| busses | ||
| muxes | ||
| i2c-boardinfo.c | ||
| i2c-core.c | ||
| i2c-core.h | ||
| i2c-dev.c | ||
| i2c-mux.c | ||
| i2c-slave-eeprom.c | ||
| i2c-smbus.c | ||
| i2c-stub.c | ||
| Kconfig | ||
| Makefile | ||