• Christophe RICARD's avatar
    tpm: st33zp24: Add support for acpi probing for spi device. · 86ff205b
    Christophe RICARD authored
    Add support for acpi probing. SMO3324 is used for st33zp24.
    It has been tested with the following acpi node on Minnowboard:
    
    Device (TPM1)
    {
    	Name (_ADR, Zero)  // _ADR: Address
    	Name (_HID, "SMO3324")  // _HID: Hardware ID
    	Name (_CID, "SMO3324")  // _CID: Compatible ID
    	Name (_DDN, "SMO TPM")  // _DDN: DOS Device Name
    	Name (_UID, One)  // _UID: Unique ID
    	Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
    	{
    		Name (SBUF, ResourceTemplate ()
    		{
    			SpiSerialBus (0, PolarityLow, FourWireMode, 8,
    				      ControllerInitiated, 4000000, ClockPolarityLow,
    				      ClockPhaseFirst, "\\_SB.SPI1",
    				      0x00, ResourceConsumer, ,)
    			GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000,
    				 "\\_SB.GPO2", 0x00, ResourceConsumer, ,)
    			{       // Pin list
    				0x0001
    			}
    			GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly,
    				"\\_SB.GPO2", 0x00, ResourceConsumer, ,)
    			{       // Pin list
    				0x0002,
    			}
    		})
    		Return (SBUF) /* \_SB_.SPI1.TPM1._CRS.SBUF */
    	}
    	Method (_STA, 0, NotSerialized)  // _STA: Status
    	{
    		Return (0x0F)
    	}
    }
    Signed-off-by: default avatarChristophe Ricard <christophe-h.ricard@st.com>
    Reviewed-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
    Signed-off-by: default avatarJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
    86ff205b
spi.c 11.5 KB