On Friday, September 16, 2016 12:39:25 PM CEST Cédric Le Goater wrote: > From: Alistair Popple <alistair@xxxxxxxxxxxx> > > This patch adds a simple device driver to expose the iBT interface on > Aspeed SOCs (AST2400 and AST2500) as a character device. Such SOCs are > commonly used as BMCs (BaseBoard Management Controllers) and this > driver implements the BMC side of the BT interface. > > The BT (Block Transfer) interface is used to perform in-band IPMI > communication between a host and its BMC. Entire messages are buffered > before sending a notification to the other end, host or BMC, that > there is data to be read. Usually, the host emits requests and the BMC > responses but the specification provides a mean for the BMC to send > SMS Attention (BMC-to-Host attention or System Management Software > attention) messages. > > For this purpose, the driver introduces a specific ioctl on the > device: 'BT_BMC_IOCTL_SMS_ATN' that can be used by the system running > on the BMC to signal the host of such an event. > > The device name defaults to '/dev/ipmi-bt-host' > > Signed-off-by: Alistair Popple <alistair@xxxxxxxxxxxx> > Signed-off-by: Jeremy Kerr <jk@xxxxxxxxxx> > Signed-off-by: Joel Stanley <joel@xxxxxxxxx> > Acked-by: Arnd Bergmann <arnd@xxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
