From fecf27a373f5a6b393e93b14f8460299b8abd6f9 Mon Sep 17 00:00:00 2001 From: Peter Hung Date: Tue, 28 Jul 2015 11:59:24 +0800 Subject: [PATCH] serial: 8250_pci: add RS485 for F81504/508/512 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(). Signed-off-by: Peter Hung Signed-off-by: Greg Kroah-Hartman --- Reading git-format-patch failed