On Wed, Feb 15, 2017 at 7:09 AM, Rick Altherr <[email protected]> wrote:
> Port D and port E GPIO loopback modes are commonly enabled via hardware > straps for use with front-panel buttons. When the BMC is powered > off or fails to boot, the front-panel buttons are directly connected to > the host chipset via the loopback to allow direct power-on and reset > control. Once the BMC has booted, the loopback mode must be disabled for > the BMC to take over control of host power-on and reset. > > Disabling these loopback modes requires writing to the hardware strap > register which violates the current design of assuming the system > designer chose the strap settings for a specific reason and they should > be treated as read-only. Only the two bits of the strap register related > to these loopback modes are allowed to be written and comments have been > added to explain why. > > Signed-off-by: Rick Altherr <[email protected]> Patch applied with the ACKs for v4.12. Yours, Linus Walleij
