John Crispin | 3f0a06b | 2013-01-20 22:01:29 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify it |
| 3 | * under the terms of the GNU General Public License version 2 as published |
| 4 | * by the Free Software Foundation. |
| 5 | * |
| 6 | * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> |
| 7 | * Copyright (C) 2013 John Crispin <blogic@openwrt.org> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/clkdev.h> |
| 13 | #include <linux/clk.h> |
| 14 | |
| 15 | #include <asm/time.h> |
| 16 | |
| 17 | #include "common.h" |
| 18 | |
| 19 | struct clk { |
| 20 | struct clk_lookup cl; |
| 21 | unsigned long rate; |
| 22 | }; |
| 23 | |
| 24 | void ralink_clk_add(const char *dev, unsigned long rate) |
| 25 | { |
| 26 | struct clk *clk = kzalloc(sizeof(struct clk), GFP_KERNEL); |
| 27 | |
| 28 | if (!clk) |
Ralf Baechle | f7777dc | 2013-09-18 16:05:26 +0200 | [diff] [blame] | 29 | panic("failed to add clock"); |
John Crispin | 3f0a06b | 2013-01-20 22:01:29 +0100 | [diff] [blame] | 30 | |
| 31 | clk->cl.dev_id = dev; |
| 32 | clk->cl.clk = clk; |
| 33 | |
| 34 | clk->rate = rate; |
| 35 | |
| 36 | clkdev_add(&clk->cl); |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * Linux clock API |
| 41 | */ |
| 42 | int clk_enable(struct clk *clk) |
| 43 | { |
| 44 | return 0; |
| 45 | } |
| 46 | EXPORT_SYMBOL_GPL(clk_enable); |
| 47 | |
| 48 | void clk_disable(struct clk *clk) |
| 49 | { |
| 50 | } |
| 51 | EXPORT_SYMBOL_GPL(clk_disable); |
| 52 | |
| 53 | unsigned long clk_get_rate(struct clk *clk) |
| 54 | { |
| 55 | return clk->rate; |
| 56 | } |
| 57 | EXPORT_SYMBOL_GPL(clk_get_rate); |
| 58 | |
John Crispin | a8b6204 | 2014-03-16 04:38:07 +0000 | [diff] [blame] | 59 | int clk_set_rate(struct clk *clk, unsigned long rate) |
| 60 | { |
| 61 | return -1; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(clk_set_rate); |
| 64 | |
John Crispin | 3f0a06b | 2013-01-20 22:01:29 +0100 | [diff] [blame] | 65 | void __init plat_time_init(void) |
| 66 | { |
| 67 | struct clk *clk; |
| 68 | |
| 69 | ralink_of_remap(); |
| 70 | |
| 71 | ralink_clk_init(); |
| 72 | clk = clk_get_sys("cpu", NULL); |
| 73 | if (IS_ERR(clk)) |
| 74 | panic("unable to get CPU clock, err=%ld", PTR_ERR(clk)); |
| 75 | pr_info("CPU Clock: %ldMHz\n", clk_get_rate(clk) / 1000000); |
| 76 | mips_hpt_frequency = clk_get_rate(clk) / 2; |
| 77 | clk_put(clk); |
John Crispin | b1f172a | 2013-08-08 13:08:07 +0200 | [diff] [blame] | 78 | clocksource_of_init(); |
John Crispin | 3f0a06b | 2013-01-20 22:01:29 +0100 | [diff] [blame] | 79 | } |