Hi Matwey, On 12/03/2015 12:50 AM, Matwey V. Kornilov wrote: > I am working on v4, where I completely redesigned implementation. And > now I think that it is considerably better than v3. > It looks like the following: > https://github.com/matwey/linux/commits/8520_rs485_v4 > But it is not ready yet, there is a bug somewhere. > > In the v4, each subdriver decides separately if it needs rs485 > emulation support. Then it enables it like the following: > https://github.com/matwey/linux/commit/4455e425fc045713fb921ccec695fe183f1558f0 > Before calling serial8250_rs485_emul_enabled, the driver enables > interrupt on empty shift register (they are always there for omap_). Looks good.
Are you testing with CONFIG_SERIAL_8250_DMA=n first to simplify the debug effort? DMA adds a completely different tx path. Also, before submission, please shorten the identifiers. And Greg hates functions returning bool so just expanded serial8250_rs485_emul_enabled() inline. Regards, Peter Hurley -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
