[MinnowBoard] Linux x86 I2C device probing with ACPI
Christophe Ricard
christophe.ricard at gmail.com
Wed Oct 21 18:13:31 UTC 2015
Hi Saket,
The DSDT once extracted shows my modifications and is present in
/sys/devices/LNXSYSTM\:00/.
However when adr file shows 0x00000000.
When adding traces to the kernel, it looks like it is not able to
retrieve information from the _CRS Method...
Any idea ?
Best Regards
Christophe
On 21/10/2015 16:25, Saket Sinha wrote:
> Hi Christophe,
>
> You can dump the acpi table parsed by Linux and compare with what you
> have in the source
>
> 1. To dumo when Linux boots up -
>
> https://wiki.ubuntu.com/KernelTeam/HardwareEnableWithDSDT
>
> 2. From Grub menu itself -
>
> http://events.linuxfoundation.org/sites/events/files/slides/bits-with-demo.pdf
>
>
> Regards,
> Saket Sinha
>
>
> On Wed, Oct 21, 2015 at 7:17 PM, Christophe Ricard
> <christophe.ricard at gmail.com> wrote:
>> 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
>>
>> but i found no i2c device are probed at boot.
>>
>> For example, one default device available in the acpi table is never
>> detected: RTEK node (with ID 10EC5640).
>>
>> 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
>>
>> 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)
>> }
>> }
>> }
>>
>> Scope (I2C7)
>> {
>> }
>> }
>>
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>>
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