sh: add mmc clock in clock-sh7757
[pandora-kernel.git] / arch / sh / kernel / cpu / sh4a / clock-sh7757.c
1 /*
2  * arch/sh/kernel/cpu/sh4/clock-sh7757.c
3  *
4  * SH7757 support for the clock framework
5  *
6  *  Copyright (C) 2009-2010  Renesas Solutions Corp.
7  *
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
10  * for more details.
11  */
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/io.h>
15 #include <linux/clkdev.h>
16 #include <asm/clock.h>
17 #include <asm/freq.h>
18
19 /*
20  * Default rate for the root input clock, reset this with clk_set_rate()
21  * from the platform code.
22  */
23 static struct clk extal_clk = {
24         .rate           = 48000000,
25 };
26
27 static unsigned long pll_recalc(struct clk *clk)
28 {
29         int multiplier;
30
31         multiplier = test_mode_pin(MODE_PIN0) ? 24 : 16;
32
33         return clk->parent->rate * multiplier;
34 }
35
36 static struct clk_ops pll_clk_ops = {
37         .recalc         = pll_recalc,
38 };
39
40 static struct clk pll_clk = {
41         .ops            = &pll_clk_ops,
42         .parent         = &extal_clk,
43         .flags          = CLK_ENABLE_ON_INIT,
44 };
45
46 static struct clk *clks[] = {
47         &extal_clk,
48         &pll_clk,
49 };
50
51 static unsigned int div2[] = { 1, 1, 2, 1, 1, 4, 1, 6,
52                                1, 1, 1, 16, 1, 24, 1, 1 };
53
54 static struct clk_div_mult_table div4_div_mult_table = {
55         .divisors = div2,
56         .nr_divisors = ARRAY_SIZE(div2),
57 };
58
59 static struct clk_div4_table div4_table = {
60         .div_mult_table = &div4_div_mult_table,
61 };
62
63 enum { DIV4_I, DIV4_SH, DIV4_P, DIV4_NR };
64
65 #define DIV4(_bit, _mask, _flags) \
66   SH_CLK_DIV4(&pll_clk, FRQCR, _bit, _mask, _flags)
67
68 struct clk div4_clks[DIV4_NR] = {
69         /*
70          * P clock is always enable, because some P clock modules is used
71          * by Host PC.
72          */
73         [DIV4_P] = DIV4(0, 0x2800, CLK_ENABLE_ON_INIT),
74         [DIV4_SH] = DIV4(12, 0x00a0, CLK_ENABLE_ON_INIT),
75         [DIV4_I] = DIV4(20, 0x0004, CLK_ENABLE_ON_INIT),
76 };
77
78 #define MSTPCR0         0xffc80030
79 #define MSTPCR1         0xffc80034
80 #define MSTPCR2         0xffc10028
81
82 enum { MSTP004, MSTP000, MSTP114, MSTP113, MSTP112,
83        MSTP111, MSTP110, MSTP103, MSTP102, MSTP220,
84        MSTP_NR };
85
86 static struct clk mstp_clks[MSTP_NR] = {
87         /* MSTPCR0 */
88         [MSTP004] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 4, 0),
89         [MSTP000] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 0, 0),
90
91         /* MSTPCR1 */
92         [MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0),
93         [MSTP113] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 13, 0),
94         [MSTP112] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 12, 0),
95         [MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0),
96         [MSTP110] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 10, 0),
97         [MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0),
98         [MSTP102] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 2, 0),
99
100         /* MSTPCR2 */
101         [MSTP220] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 20, 0),
102 };
103
104 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
105
106 static struct clk_lookup lookups[] = {
107         /* main clocks */
108         CLKDEV_CON_ID("extal", &extal_clk),
109         CLKDEV_CON_ID("pll_clk", &pll_clk),
110
111         /* DIV4 clocks */
112         CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
113         CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
114         CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
115
116         /* MSTP32 clocks */
117         CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP004]),
118         CLKDEV_CON_ID("riic", &mstp_clks[MSTP000]),
119         {
120                 /* TMU0 */
121                 .dev_id         = "sh_tmu.0",
122                 .con_id         = "tmu_fck",
123                 .clk            = &mstp_clks[MSTP113],
124         }, {
125                 /* TMU1 */
126                 .dev_id         = "sh_tmu.1",
127                 .con_id         = "tmu_fck",
128                 .clk            = &mstp_clks[MSTP114],
129         },
130         {
131                 /* SCIF4 (But, ID is 2) */
132                 .dev_id         = "sh-sci.2",
133                 .con_id         = "sci_fck",
134                 .clk            = &mstp_clks[MSTP112],
135         }, {
136                 /* SCIF3 */
137                 .dev_id         = "sh-sci.1",
138                 .con_id         = "sci_fck",
139                 .clk            = &mstp_clks[MSTP111],
140         }, {
141                 /* SCIF2 */
142                 .dev_id         = "sh-sci.0",
143                 .con_id         = "sci_fck",
144                 .clk            = &mstp_clks[MSTP110],
145         },
146         CLKDEV_CON_ID("usb0", &mstp_clks[MSTP102]),
147         CLKDEV_CON_ID("mmc0", &mstp_clks[MSTP220]),
148 };
149
150 int __init arch_clk_init(void)
151 {
152         int i, ret = 0;
153
154         for (i = 0; i < ARRAY_SIZE(clks); i++)
155                 ret |= clk_register(clks[i]);
156         for (i = 0; i < ARRAY_SIZE(lookups); i++)
157                 clkdev_add(&lookups[i]);
158
159         if (!ret)
160                 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
161                                            &div4_table);
162         if (!ret)
163                 ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
164
165         return ret;
166 }
167