Re: [PATCH v2] i2c: designware: Add ACPI HID for DWAPB I2C controller on FUJITSU-MONAKA

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On 10/24/24 11:03 AM, Andy Shevchenko wrote:
On Thu, Oct 24, 2024 at 07:15:53AM +0000, Yoshihiro Furudera wrote:
Enable DWAPB I2C controller support on FUJITSU-MONAKA.
This will be used in the FUJITSU-MONAKA server scheduled
for shipment in 2027.

The DSDT information obtained when verified using an
in-house simulator is presented below.

      Device (SMB0)
      {
          Name (_HID, "FUJI200B")  // _HID: Hardware ID
          Name (_UID, Zero)  // _UID: Unique ID
          ...
          Name (_CRS, ResourceTemplate ()
          {
              Memory32Fixed (ReadWrite,
                  0x2A4B0000,         // Address Base
                  0x00010000,         // Address Length
                  )
              Interrupt (ResourceConsumer, Level, ActiveHigh, Exclusive, ,, )
              {
                  0x00000159,
              }
          })
          ...
      }

The expression SMB0 is used to indicate SMBus HC#0,
a string of up to four characters.

Created the SMB0 object according to the following
specifications:

ACPI Specification
13.2. Accessing the SMBus from ASL Code
https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/13_ACPI_System_Mgmt_Bus_Interface_Spec/accessing-the-smbus-from-asl-code.html

IPMI Specification
Example 4: SSIF Interface(P574)
https://www.intel.co.jp/content/www/jp/ja/products/docs/servers/ipmi/ipmi-second-gen-interface-spec-v2-rev1-1.html

Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>

Acked-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>




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