Hi Zoran Base on the version Baytrail_coreboot_MR5_Dec-21-2015(coreboot) that is released by Intel. In the coreboot(Intel released and defautle is acpi mode) I can install driver and device is workable in win8. I can see hs-uart controller in device manage and no yellow mark.
In last coreboot source code. after I modify "pcdlpsssioenablepcimode" to "LPSS_PCI_MODE_DISABLE". Then the lpss device will be confgured to ACPI mode. but the hs-uart controller and I2C controller will shown yellow mark in win8 device manager. Because the main controller is not workable in win8. I don't check the sub-device device. 2016-05-16 17:16 GMT+08:00 Zoran Stojsavljevic < [email protected]>: > Hello Cheng, > > Again, I'll repeat my questions: > [1] Are you talking about BIOS, where you are enabling in LPSS ACPI > (disabling automatically PCI) mode? > [2] I need better explanation of your use case... Are you using BYT MR4, > then MR5, or instead MR4 BIOS, or...? > [3] For WIN8.1 you need to have the following: > For BIOS to work (and get rid off these yellow triangles with > question marks): > [A] ACPI mode in BIOS: South Cluster Configuration -> LPSS & SCC > Configuration -> LPSS LPSS & SCC > Devices Mode -> Select "ACPI Mode"; > [B] The GPIO controller driver is/should be prerequisite for HS-UART > driver. There is a document named: > Intel_Processor_Win8_IO_Drivers_Gold_MR1. You should ask for > it from INTEL support. If installed > correctly, you should see HS-UART Controller device under > System Devices in Device Manager. Also > new unknown devices should appear: ACPI\BCM2E1A and > ACPI\BCM4752. These devices are for > HS-UART Sub Device Driver; > [C] You should compile the UART Sub Device Driver (by 1.2.1 of Intel > Atom E3800 Win8.1 HS-UART Sub > Device Driver Sample Code Guide_1.0), and install after > building them. After that you should see Ports in > Device Manager. > > Zoran > > On Fri, May 13, 2016 at 5:43 AM, cheng yichen <[email protected]> > wrote: > >> >> HI all >> >> I try to enable Lpss device(i2c hs-uart) with ACPI mdoe. >> i2c and hs-uart will show yellow mark in device manager with win8.1. >> but I can't find the same issue in intel coreboot(versrion MR5). >> Do you have any idea for the issue? Thank you >> >> -- >> coreboot mailing list: [email protected] >> https://www.coreboot.org/mailman/listinfo/coreboot >> > >
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