Govindraj, Thanks for your response. On Monday, 17 October 2011 4:43 PM, Govindraj [mailto:govindraj.ti@xxxxxxxxx] wrote: > > Hi Paul, > > On Mon, Oct 17, 2011 at 10:18 AM, Paul Chiha <paul.chiha@xxxxxxxxxxxxxxxxxx> > wrote: > > Hi, > > > > I'm a newbie and would like some help with serial drivers in the kernel. > > > > I've got an OMAP35x EVM (with UARTs 1/2-3 on board), and I would like > > to write my own driver which uses UART 3. I'm not sure of the best > > way to do this. > > Most use cases tend to use omap-serial itself with a client driver, for any > client peripheral over uart. > > > I don't know how to use the existing ttyO2 device and omap-serial > > driver for my own purpose. Basically I want to write a driver which > > sits between the application and the omap-serial driver, but only for > > UART 3. Is there a simple mechanism to do this, or do I need to > > replace omap_serial with my own? > > I don't know why you want to do that rather use the existing uart driver, for > any console usage you can pass console parameter from bootargs and works well, > for any use case from user space application can open > UART3(ttyO2) configure it using termios ops and use it. > > How is your use case very different from these? > Because I need to be able to convert the given datastream, and send out packets at a precise periodic interval. I could do it all in userspace, but I need to be able to guarantee timing. Hence, a driver is recommended. > If you have a device connected over UART and want to controlled then, you may > consider intermediate layer as ldisc layer. > ex: TI Bluetooth driver "drivers/misc/ti-st/st_core.c" > Thanks, I'll have a look. > > > Also, > > is there an existing driver that does something similar to what I want > > that I can base my driver on? > > I dont see any such driver other omap-serial which supports omap-uarts, but > AFAIK you cannot add stuffs in that driver for a particular use case. > Yes I know. I'll see if I can use the existing omap-serial driver. Thanks, Paul -- 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
