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.
6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
10 #include <linux/export.h>
11 #include <linux/clk.h>
15 #include <asm/div64.h>
17 #include <lantiq_soc.h>
21 static unsigned int ram_clocks[] = {
22 CLOCK_167M, CLOCK_133M, CLOCK_111M, CLOCK_83M };
23 #define DDR_HZ ram_clocks[ltq_cgu_r32(CGU_SYS) & 0x3]
25 /* legacy xway clock */
29 #define CGU_SYS_VR9 0x0c
30 #define CGU_IF_CLK_VR9 0x24
32 unsigned long ltq_danube_fpi_hz(void)
34 unsigned long ddr_clock = DDR_HZ;
36 if (ltq_cgu_r32(CGU_SYS) & 0x40)
37 return ddr_clock >> 1;
41 unsigned long ltq_danube_cpu_hz(void)
43 switch (ltq_cgu_r32(CGU_SYS) & 0xc) {
55 unsigned long ltq_danube_pp32_hz(void)
57 unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 7) & 3;
78 unsigned long ltq_ar9_sys_hz(void)
80 if (((ltq_cgu_r32(CGU_SYS) >> 3) & 0x3) == 0x2)
85 unsigned long ltq_ar9_fpi_hz(void)
87 unsigned long sys = ltq_ar9_sys_hz();
89 if (ltq_cgu_r32(CGU_SYS) & BIT(0))
94 unsigned long ltq_ar9_cpu_hz(void)
96 if (ltq_cgu_r32(CGU_SYS) & BIT(2))
97 return ltq_ar9_fpi_hz();
99 return ltq_ar9_sys_hz();
102 unsigned long ltq_vr9_cpu_hz(void)
104 unsigned int cpu_sel;
107 cpu_sel = (ltq_cgu_r32(CGU_SYS_VR9) >> 4) & 0xf;
124 clk = CLOCK_196_608M;
142 unsigned long ltq_vr9_fpi_hz(void)
144 unsigned int ocp_sel, cpu_clk;
147 cpu_clk = ltq_vr9_cpu_hz();
148 ocp_sel = ltq_cgu_r32(CGU_SYS_VR9) & 0x3;
161 clk = (cpu_clk * 2) / 5;
175 unsigned long ltq_vr9_pp32_hz(void)
177 unsigned int clksys = (ltq_cgu_r32(CGU_SYS) >> 16) & 3;