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Source at commit 87c1d85060f383267e56764f05f6f69900d3895b created 13 years 24 days ago. By Lars-Peter Clausen, Split time.c into timer-cevt.c and timer-csrc.c | |
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1 | /* |
2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> |
3 | * JZ4740 platform time support |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License as published by the |
7 | * Free Software Foundation; either version 2 of the License, or (at your |
8 | * option) any later version. |
9 | * |
10 | * You should have received a copy of the GNU General Public License along |
11 | * with this program; if not, write to the Free Software Foundation, Inc., |
12 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
13 | * |
14 | */ |
15 | |
16 | #include <linux/init.h> |
17 | |
18 | #include <linux/clocksource.h> |
19 | |
20 | #include <asm/time.h> |
21 | |
22 | #include "clock.h" |
23 | #include "timer.h" |
24 | #include "timer-csrc.h" |
25 | |
26 | static unsigned int jz47xx_timer_clocksource; |
27 | |
28 | static cycle_t jz47xx_clocksource_read(struct clocksource *cs) |
29 | { |
30 | return jz4740_timer_get_count(jz47xx_timer_clocksource); |
31 | } |
32 | |
33 | static struct clocksource jz47xx_clocksource = { |
34 | .name = "jz47xx-timer", |
35 | .rating = 200, |
36 | .read = jz47xx_clocksource_read, |
37 | .mask = CLOCKSOURCE_MASK(16), |
38 | .flags = CLOCK_SOURCE_IS_CONTINUOUS, |
39 | }; |
40 | |
41 | int __init jz47xx_timer_csrc_init(unsigned int timer_id) |
42 | { |
43 | int ret; |
44 | unsigned int clk_rate; |
45 | |
46 | jz47xx_timer_clocksource = timer_id; |
47 | |
48 | clk_rate = jz4740_clock_bdata.ext_rate >> 4; |
49 | |
50 | clocksource_set_clock(&jz47xx_clocksource, clk_rate); |
51 | ret = clocksource_register(&jz47xx_clocksource); |
52 | |
53 | if (ret) { |
54 | printk(KERN_ERR "Failed to register clocksource: %d\n", ret); |
55 | return ret; |
56 | } |
57 | |
58 | jz4740_timer_set_ctrl(jz47xx_timer_clocksource, |
59 | JZ_TIMER_CTRL_PRESCALE_16 | JZ_TIMER_CTRL_SRC_EXT); |
60 | |
61 | jz4740_timer_set_period(jz47xx_timer_clocksource, 0xffff); |
62 | jz4740_timer_enable(jz47xx_timer_clocksource); |
63 | |
64 | return 0; |
65 | } |
66 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9