2 * Ralink RT305X clock API
4 * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/err.h>
15 #include <linux/clk.h>
17 #include <asm/mach-ralink/common.h>
18 #include <asm/mach-ralink/rt305x.h>
19 #include <asm/mach-ralink/rt305x_regs.h>
26 static struct clk rt305x_cpu_clk;
27 static struct clk rt305x_sys_clk;
28 static struct clk rt305x_wdt_clk;
29 static struct clk rt305x_uart_clk;
31 void __init rt305x_clocks_init(void)
35 t = rt305x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
36 t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
39 case SYSTEM_CONFIG_CPUCLK_320:
40 rt305x_cpu_clk.rate = 320000000;
42 case SYSTEM_CONFIG_CPUCLK_384:
43 rt305x_cpu_clk.rate = 384000000;
47 rt305x_sys_clk.rate = rt305x_cpu_clk.rate / 3;
48 rt305x_uart_clk.rate = rt305x_sys_clk.rate;
49 rt305x_wdt_clk.rate = rt305x_sys_clk.rate;
55 struct clk *clk_get(struct device *dev, const char *id)
57 if (!strcmp(id, "sys"))
58 return &rt305x_sys_clk;
60 if (!strcmp(id, "cpu"))
61 return &rt305x_cpu_clk;
63 if (!strcmp(id, "wdt"))
64 return &rt305x_wdt_clk;
66 if (!strcmp(id, "uart"))
67 return &rt305x_uart_clk;
69 return ERR_PTR(-ENOENT);
71 EXPORT_SYMBOL(clk_get);
73 int clk_enable(struct clk *clk)
77 EXPORT_SYMBOL(clk_enable);
79 void clk_disable(struct clk *clk)
82 EXPORT_SYMBOL(clk_disable);
84 unsigned long clk_get_rate(struct clk *clk)
88 EXPORT_SYMBOL(clk_get_rate);
90 void clk_put(struct clk *clk)
93 EXPORT_SYMBOL(clk_put);