2 * arch/sh/kernel/cpu/sh4a/clock-sh7785.c
4 * SH7785 support for the clock framework
6 * Copyright (C) 2007 - 2009 Paul Mundt
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/clk.h>
16 #include <linux/cpufreq.h>
17 #include <asm/clock.h>
19 #include <cpu/sh7785.h>
22 * Default rate for the root input clock, reset this with clk_set_rate()
23 * from the platform code.
25 static struct clk extal_clk = {
31 static unsigned long pll_recalc(struct clk *clk)
35 multiplier = test_mode_pin(MODE_PIN4) ? 36 : 72;
37 return clk->parent->rate * multiplier;
40 static struct clk_ops pll_clk_ops = {
44 static struct clk pll_clk = {
49 .flags = CLK_ENABLE_ON_INIT,
52 static struct clk *clks[] = {
57 static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
60 static struct clk_div_mult_table div4_table = {
62 .nr_divisors = ARRAY_SIZE(div2),
65 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_GA,
66 DIV4_DU, DIV4_P, DIV4_NR };
68 #define DIV4(_str, _bit, _mask, _flags) \
69 SH_CLK_DIV4(_str, &pll_clk, FRQMR1, _bit, _mask, _flags)
71 struct clk div4_clks[DIV4_NR] = {
72 [DIV4_P] = DIV4("peripheral_clk", 0, 0x0f80, 0),
73 [DIV4_DU] = DIV4("du_clk", 4, 0x0ff0, 0),
74 [DIV4_GA] = DIV4("ga_clk", 8, 0x0030, 0),
75 [DIV4_DDR] = DIV4("ddr_clk", 12, 0x000c, CLK_ENABLE_ON_INIT),
76 [DIV4_B] = DIV4("bus_clk", 16, 0x0fe0, CLK_ENABLE_ON_INIT),
77 [DIV4_SH] = DIV4("shyway_clk", 20, 0x000c, CLK_ENABLE_ON_INIT),
78 [DIV4_U] = DIV4("umem_clk", 24, 0x000c, CLK_ENABLE_ON_INIT),
79 [DIV4_I] = DIV4("cpu_clk", 28, 0x000e, CLK_ENABLE_ON_INIT),
82 #define MSTPCR0 0xffc80030
83 #define MSTPCR1 0xffc80034
85 static struct clk mstp_clks[] = {
87 SH_CLK_MSTP32("scif_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
88 SH_CLK_MSTP32("scif_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
89 SH_CLK_MSTP32("scif_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
90 SH_CLK_MSTP32("scif_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
91 SH_CLK_MSTP32("scif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
92 SH_CLK_MSTP32("scif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
93 SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
94 SH_CLK_MSTP32("ssi_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 20, 0),
95 SH_CLK_MSTP32("hac_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 17, 0),
96 SH_CLK_MSTP32("hac_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 16, 0),
97 SH_CLK_MSTP32("mmcif_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 13, 0),
98 SH_CLK_MSTP32("flctl_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 12, 0),
99 SH_CLK_MSTP32("tmu345_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 9, 0),
100 SH_CLK_MSTP32("tmu012_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 8, 0),
101 SH_CLK_MSTP32("siof_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 3, 0),
102 SH_CLK_MSTP32("hspi_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 2, 0),
105 SH_CLK_MSTP32("hudi_fck", -1, NULL, MSTPCR1, 19, 0),
106 SH_CLK_MSTP32("ubc_fck", -1, NULL, MSTPCR1, 17, 0),
107 SH_CLK_MSTP32("dmac_11_6_fck", -1, NULL, MSTPCR1, 5, 0),
108 SH_CLK_MSTP32("dmac_5_0_fck", -1, NULL, MSTPCR1, 4, 0),
109 SH_CLK_MSTP32("gdta_fck", -1, NULL, MSTPCR1, 0, 0),
112 int __init arch_clk_init(void)
116 for (i = 0; i < ARRAY_SIZE(clks); i++)
117 ret |= clk_register(clks[i]);
120 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
123 ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks));