On Wed, Oct 21, 2015 at 09:19:24PM +0200, Christophe Ricard wrote:
> From: Christophe Ricard <[email protected]>
>
> Hi,
>
> I am trying to probe slave i2c devices with ACPI running Ubuntu 15.04 and
> kernel 4.3
> without success so far.
>
> I've followed guidance here:
> http://elinux.org/Minnowboard:MinnowMaxLinuxKernel
> <http://elinux.org/Minnowboard:MinnowMaxLinuxKernel>
>
> but i found no i2c device are probed at boot.
By probed do you mean that they are not listed under
/sys/bus/i2c/devices/ or that a driver is not probed against an existing
device?
> For example, one default device available in the acpi table is never
> detected: RTEK node (with ID 10EC5640).
If the device _STA() method returns 0 then we do not enumerate it. You
can check this by looking for the corresponding ACPI device node. For
example I have here I2C connected touch screen:
# cat /sys/bus/acpi/devices/NTRG0001\:00/status
15
15 means that it is there (among other things). Also the device is then
available as I2C device here:
# ls -1 /sys/bus/i2c/devices/
i2c-0
i2c-1
i2c-2
i2c-NTRG0001:00
> When adding my own device to I2C7, my device is never detected as well .
>
> For example the complete modified I2C7 is at the end of the message.
>
> I am compiling the kernel with options:
> CONFIG_ACPI_CUSTOM_DSDT_FILE="dsdt.hex"
> CONFIG_ACPI_CUSTOM_DSDT=y
> CONFIG_ACPI_INITRD_TABLE_OVERRIDE=y
You don't need the last one.
> I am running on Minnowboard firmware 0.83 with default options.
>
> Best Regards
> Christophe
>
> Device (I2C7)
> {
> Name (_ADR, Zero) // _ADR: Address
> Name (_HID, "80860F41" /* Intel Baytrail I2C Host Controller */)
> // _HID: Hardware ID
> Name (_CID, "80860F41" /* Intel Baytrail I2C Host Controller */)
> // _CID: Compatible ID
> Name (_DDN, "Intel(R) I2C Controller #7 - 80860F47") // _DDN: DOS
> Device Name
> Name (_UID, 0x07) // _UID: Unique ID
> Name (_DEP, Package (One) // _DEP: Dependencies
> {
> PEPD
> })
> Name (RBUF, ResourceTemplate ()
> {
> Memory32Fixed (ReadWrite,
> 0x00000000, // Address Base
> 0x00001000, // Address Length
> _Y1F)
> Interrupt (ResourceConsumer, Level, ActiveLow, Exclusive, ,, )
> {
> 0x00000026,
> }
> FixedDMA (0x001C, 0x0004, Width32bit, )
> FixedDMA (0x001D, 0x0005, Width32bit, )
> })
> Method (SSCN, 0, NotSerialized)
> {
> Name (PKG, Package (0x03)
> {
> 0x0200,
> 0x0200,
> 0x06
> })
> Return (PKG) /* \_SB_.I2C7.SSCN.PKG_ */
> }
>
> Method (FMCN, 0, NotSerialized)
> {
> Name (PKG, Package (0x03)
> {
> 0x55,
> 0x99,
> 0x06
> })
> Return (PKG) /* \_SB_.I2C7.FMCN.PKG_ */
> }
>
> Method (FPCN, 0, NotSerialized)
> {
> Name (PKG, Package (0x03)
> {
> 0x1B,
> 0x3A,
> 0x06
> })
> Return (PKG) /* \_SB_.I2C7.FPCN.PKG_ */
> }
>
> Method (_HRV, 0, NotSerialized) // _HRV: Hardware Revision
> {
> Return (SOCS) /* \SOCS */
> }
>
> Method (_CRS, 0, NotSerialized) // _CRS: Current Resource
> Settings
> {
> CreateDWordField (RBUF, \_SB.I2C7._Y1F._BAS, B0BA) // _BAS:
> Base Address
> CreateDWordField (RBUF, \_SB.I2C7._Y1F._LEN, B0LN) // _LEN:
> Length
> B0BA = I70A /* \I70A */
> B0LN = I70L /* \I70L */
> Return (RBUF) /* \_SB_.I2C7.RBUF */
> }
>
> Method (_STA, 0, NotSerialized) // _STA: Status
> {
> If ((PCIM == One))
> {
> Return (Zero)
> }
>
> If (((I70A == Zero) || (L27D == One)))
> {
> Return (Zero)
> }
>
> Return (0x0F)
> }
>
> Method (_PS3, 0, NotSerialized) // _PS3: Power State 3
> {
> PSAT |= 0x03
> PSAT |= Zero
> }
>
> Method (_PS0, 0, NotSerialized) // _PS0: Power State 0
> {
> PSAT &= 0xFFFFFFFC
> PSAT |= Zero
> }
>
> OperationRegion (KEYS, SystemMemory, I71A, 0x0100)
> Field (KEYS, DWordAcc, NoLock, WriteAsZeros)
> {
> Offset (0x84),
> PSAT, 32
> }
>
> Device (NFC1)
> {
> Name (_ADR, Zero) // _ADR: Address
> Name (_HID, "NXP5441") // _HID: Hardware ID
> Name (_CID, "NXP5441") // _CID: Compatible ID
> Name (_DDN, "NXP NFC") // _DDN: DOS Device Name
> Name (_UID, One) // _UID: Unique ID
> Method (_CRS, 0, NotSerialized) // _CRS: Current Resource
> Settings
> {
> Name (SBUF, ResourceTemplate ()
> {
> I2cSerialBus (0x0028, ControllerInitiated, 0x00061A80,
> AddressingMode7Bit, "\\_SB.I2C7",
> 0x00, ResourceConsumer, ,
> )
> Interrupt (ResourceConsumer, Level, ActiveLow,
> Exclusive, ,, )
> {
> 0x00000047,
> }
> GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
> IoRestrictionOutputOnly,
> "\\_SB.GPO2", 0x00, ResourceConsumer, ,
> )
> { // Pin list
> 0x0009
> }
> GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
> IoRestrictionOutputOnly,
> "\\_SB.GPO2", 0x00, ResourceConsumer, ,
> )
> { // Pin list
> 0x0008
> }
> })
> Return (SBUF) /* \_SB_.I2C7.NFC1._CRS.SBUF */
> }
>
> Method (_STA, 0, NotSerialized) // _STA: Status
> {
> If ((NFCS == One))
> {
> Return (0x0F)
> }
>
> Return (Zero)
Can you check what following returns?
# cat /sys/bus/acpi/devices/NXP5441:00/status
> }
> }
> }
>
> Scope (I2C7)
> {
> }
> }
>
>
>
> --
> 2.1.4
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