From bea12b782337105feeb3aeb0875d110eed007803 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Tue, 26 Nov 2013 17:45:27 +0000 Subject: malta: enable PIIX4 SERIRQ Whilst U-boot does not require this itself, Linux currently relies upon it having been muxed and enabled by the bootloader. Thus in order to preserve compatibility with current kernels before a fix is merged in Linux we will enable the SERIRQ interrupt and mux it to its pin. Without doing this current kernels will never receive serial port interrupts and the end result is typically that userland appears to hang. Signed-off-by: Paul Burton --- arch/mips/include/asm/malta.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch/mips/include/asm') diff --git a/arch/mips/include/asm/malta.h b/arch/mips/include/asm/malta.h index bd9043d..9e7c045 100644 --- a/arch/mips/include/asm/malta.h +++ b/arch/mips/include/asm/malta.h @@ -56,5 +56,12 @@ #define PCI_CFG_PIIX4_PIRQRCB 0x61 #define PCI_CFG_PIIX4_PIRQRCC 0x62 #define PCI_CFG_PIIX4_PIRQRCD 0x63 +#define PCI_CFG_PIIX4_SERIRQC 0x64 +#define PCI_CFG_PIIX4_GENCFG 0xb0 + +#define PCI_CFG_PIIX4_SERIRQC_EN (1 << 7) +#define PCI_CFG_PIIX4_SERIRQC_CONT (1 << 6) + +#define PCI_CFG_PIIX4_GENCFG_SERIRQ (1 << 16) #endif /* _MIPS_ASM_MALTA_H */ -- cgit v1.1