| Vineet Gupta | 0208c96 | 2013-01-23 17:24:17 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #ifndef _ASM_ARC_SERIAL_H |
| 10 | #define _ASM_ARC_SERIAL_H |
| 11 | |
| 12 | /* |
| 13 | * early-8250 requires BASE_BAUD to be defined and includes this header. |
| 14 | * We put in a typical value: |
| 15 | * (core clk / 16) - i.e. UART samples 16 times per sec. |
| 16 | * Athough in multi-platform-image this might not work, specially if the |
| 17 | * clk driving the UART is different. |
| 18 | * We can't use DeviceTree as this is typically for early serial. |
| 19 | */ |
| 20 | |
| 21 | #include <asm/clk.h> |
| 22 | |
| 23 | #define BASE_BAUD (arc_get_core_freq() / 16) |
| 24 | |
| Christian Ruppert | 072eb69 | 2013-04-12 08:40:59 +0200 | [diff] [blame] | 25 | /* |
| 26 | * This is definitely going to break early 8250 consoles on multi-platform |
| 27 | * images but hey, it won't add any code complexity for a debug feature of |
| 28 | * one broken driver. |
| 29 | */ |
| 30 | #ifdef CONFIG_ARC_PLAT_TB10X |
| 31 | #undef BASE_BAUD |
| 32 | #define BASE_BAUD (arc_get_core_freq() / 16 / 3) |
| 33 | #endif |
| 34 | |
| Vineet Gupta | 0208c96 | 2013-01-23 17:24:17 +0530 | [diff] [blame] | 35 | #endif /* _ASM_ARC_SERIAL_H */ |