On 01/16/2015 12:23 PM, Andre Przywara wrote: > The ARM Server Base System Architecture[1] document describes a > generic UART which is a subset of the PL011 UART. > It lacks DMA support, baud rate control and modem status line > control, among other things. > The idea is to move the UART initialization and setup into the > firmware (which does this job today already) and let the kernel just > use the UART for sending and receiving characters. > We use the recent refactoring the build a new struct uart_ops > variable which points to some new functions avoiding access to the > missing registers. We reuse as much existing PL011 code as possible. > > In contrast to the PL011 the SBSA UART does not define any AMBA or > PrimeCell relations, so we go a pretty generic probe function > which only uses platform device functions. > A DT binding is provided, but other systems can easily attach to it, > too (hint, hint!). > > Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> > --- <snip> Andre, I'm a little late to address this patchset, but the SBSA defines all the Generic UART registers 32-bit wide. However, the amba-pl011 driver uses 16-bit accessors. How will you be handling that? Can the ARM PL011 hardware handle 32-bit access? Philip -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
