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<p class="MsoNormal">Hi All,<o:p></o:p></p>
<p class="MsoNormal">I feel I am going around in circles with this problem. The task at hand is to be able to upgrade coreboot/uefi image in a winbond W25Q64 flash chip from linux. This chip is connected to the PCU SPI interface on the Intel e3805 processor.
I know coreboot is writing to this chip without problem from the log:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">SF: Got idcode: ef 60 17 00 00 <o:p></o:p></p>
<p class="MsoNormal">SF: Detected W25Q64DW with sector size 0x1000, total 0x800000<o:p></o:p></p>
<p class="MsoNormal">Need to erase the MRC cache region of 65536 bytes at ffd10000<o:p></o:p></p>
<p class="MsoNormal">SF: erase 20 51 0 0 (511000)<o:p></o:p></p>
<p class="MsoNormal">SPI: read 0080 from 0090<o:p></o:p></p>
<p class="MsoNormal">SPI: wrote 000c to 0090<o:p></o:p></p>
<p class="MsoNormal">SPI: wrote 06 to 0098<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However linux is not detecting the flash device or the PCH SPI controller. Disassembling the dsdt table I can see e3800 soc devices such as the HPET and PIC but no PCH SPI. The only SPI device is part of the SIO:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> Device (SPI1)<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> Name (_HID, "80860F0E" /* Intel SPI Controller */) // _HID: Hardware ID<o:p></o:p></p>
<p class="MsoNormal"> Name (_UID, One) // _UID: Unique ID<o:p></o:p></p>
<p class="MsoNormal"> Name (_DDN, "SPI Controller #2") // _DDN: DOS Device Name<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My question is does coreboot need to include the PCU SPI controller in the acpi tables and if so how do I do that?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The platform is a custom design but very similar to the Intel Minnow Turbot board.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks,<o:p></o:p></p>
<p class="MsoNormal">Graham Perkins.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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