BMC/Intel-BMC/linux.git/drivers/tty/serial/aspeed-vuart.c, branch dev-4.3

serial/aspeed-vuart: Perform enable/disable on driver bind/unbind

2016-02-12T04:38:57+00:00

Rather than exposing an enable sysfs attribute, we can just set the VUART enabled bit when we bind to the device, and clear it on unbind. We don't want to do this on open/release, as the host may be using this bit to configure serial output modes, which is independent of whether the devices has been opened by BMC userspace. Signed-off-by: Jeremy Kerr Signed-off-by: Joel Stanley

serial/aspeed-vuart: Only disable host tx discard when serial port is in use

2016-02-12T04:15:21+00:00

OpenPOWER firmware doesn't like it when the host-side of the VUART's FIFO is not drained. This change only disables host TX discard mode when the port has been opened. Signed-off-by: Jeremy Kerr Tested-by: Norman James Signed-off-by: Joel Stanley

serial/aspeed-vuart: Fix typo

2016-02-10T06:22:03+00:00

Signed-off-by: Joel Stanley

serial/aspeed-vuart: Disable host TX discard mode during init

2016-02-10T06:20:56+00:00

If host TX discard mode is enabled, we don't see the LSR[RBR} bit getting set on new characters written on the host side. This makes the VUART a little useless. This change set this bit during VUART initialisation, to disable host TX discard. Signed-off-by: Jeremy Kerr Signed-off-by: Joel Stanley

drivers/serial: Add driver for Aspeed virtual UART

2016-01-30T00:34:18+00:00

This change adds a driver for the 16550-based Aspeed virtual UART device. We use a similar process to the of_serial driver for device probe, but expose some VUART-specific functions through sysfs too. Signed-off-by: Jeremy Kerr