On Tue, 28 Jul 2015 11:59:24 +0800, Peter Hung wrote: > Add RS485 control for Fintek F81504/508/512 > > F81504/508/512 can control their RTS with H/W mode. > PCI configuration space for each port is 0x40 + idx * 8 + 7. > > When it set with 0x01, it's configured with RS232 mode. > RTS is controlled by MCR. > > When it set with 0x11, it's configured with RS485 mode. > RTS is controlled by H/W, RTS low with idle & RX, high with TX. > > When it set with 0x31, it's configured with RS485 mode. > RTS is controlled by H/W, RTS high with idle & RX, low with TX. > > We will force 0x01 on pci_fintek_setup(). > > Changelog: > V2 > 1. change direct bit operation with meaningful define name. > 2. due to F81504 series only support SER_RS485_ENABLED & > SER_RS485_RTS_ON_SEND. We'll clean non-support area of > struct serial_rs485. > 3. change control method of SER_RS485_RTS_ON_SEND. In our > reference circuit, the transceiver default mode needed > in rx mode with RTS logic high, tx mode with RTS logic low. > > If user set to SER_RS485_ENABLED(default), we should set > reg with 0x31. if SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND > will set reg to 0x11. > > Signed-off-by: Peter Hung <hpeter+linux_kernel@xxxxxxxxx> Looks better, thanks. For future postings please put the changelog below the ---, we don't need it in the logs. -- 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
