]> git.karo-electronics.de Git - mv-sheeva.git/blob - arch/sh/kernel/cpu/sh4a/clock-sh7786.c
Merge branch 'sh/stable-updates'
[mv-sheeva.git] / arch / sh / kernel / cpu / sh4a / clock-sh7786.c
1 /*
2  * arch/sh/kernel/cpu/sh4a/clock-sh7786.c
3  *
4  * SH7786 support for the clock framework
5  *
6  *  Copyright (C) 2010  Paul Mundt
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/clk.h>
15 #include <linux/io.h>
16 #include <linux/clk.h>
17 #include <asm/clkdev.h>
18 #include <asm/clock.h>
19 #include <asm/freq.h>
20
21 /*
22  * Default rate for the root input clock, reset this with clk_set_rate()
23  * from the platform code.
24  */
25 static struct clk extal_clk = {
26         .name           = "extal",
27         .id             = -1,
28         .rate           = 33333333,
29 };
30
31 static unsigned long pll_recalc(struct clk *clk)
32 {
33         int multiplier;
34
35         /*
36          * Clock modes 0, 1, and 2 use an x64 multiplier against PLL1,
37          * while modes 3, 4, and 5 use an x32.
38          */
39         multiplier = (sh_mv.mv_mode_pins() & 0xf) < 3 ? 64 : 32;
40
41         return clk->parent->rate * multiplier;
42 }
43
44 static struct clk_ops pll_clk_ops = {
45         .recalc         = pll_recalc,
46 };
47
48 static struct clk pll_clk = {
49         .name           = "pll_clk",
50         .id             = -1,
51         .ops            = &pll_clk_ops,
52         .parent         = &extal_clk,
53         .flags          = CLK_ENABLE_ON_INIT,
54 };
55
56 static struct clk *clks[] = {
57         &extal_clk,
58         &pll_clk,
59 };
60
61 static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
62                                24, 32, 36, 48 };
63
64 static struct clk_div_mult_table div4_div_mult_table = {
65         .divisors = div2,
66         .nr_divisors = ARRAY_SIZE(div2),
67 };
68
69 static struct clk_div4_table div4_table = {
70         .div_mult_table = &div4_div_mult_table,
71 };
72
73 enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_DU, DIV4_P, DIV4_NR };
74
75 #define DIV4(_str, _bit, _mask, _flags) \
76   SH_CLK_DIV4(_str, &pll_clk, FRQMR1, _bit, _mask, _flags)
77
78 struct clk div4_clks[DIV4_NR] = {
79         [DIV4_P] = DIV4("peripheral_clk", 0, 0x0b40, 0),
80         [DIV4_DU] = DIV4("du_clk", 4, 0x0010, 0),
81         [DIV4_DDR] = DIV4("ddr_clk", 12, 0x0002, CLK_ENABLE_ON_INIT),
82         [DIV4_B] = DIV4("bus_clk", 16, 0x0360, CLK_ENABLE_ON_INIT),
83         [DIV4_SH] = DIV4("shyway_clk", 20, 0x0002, CLK_ENABLE_ON_INIT),
84         [DIV4_I] = DIV4("cpu_clk", 28, 0x0006, CLK_ENABLE_ON_INIT),
85 };
86
87 #define MSTPCR0         0xffc40030
88 #define MSTPCR1         0xffc40034
89
90 static struct clk mstp_clks[] = {
91         /* MSTPCR0 */
92         SH_CLK_MSTP32("sci_fck", 5, &div4_clks[DIV4_P], MSTPCR0, 29, 0),
93         SH_CLK_MSTP32("sci_fck", 4, &div4_clks[DIV4_P], MSTPCR0, 28, 0),
94         SH_CLK_MSTP32("sci_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 27, 0),
95         SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 26, 0),
96         SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 25, 0),
97         SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 24, 0),
98         SH_CLK_MSTP32("ssi_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 23, 0),
99         SH_CLK_MSTP32("ssi_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 22, 0),
100         SH_CLK_MSTP32("ssi_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 21, 0),
101         SH_CLK_MSTP32("ssi_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 20, 0),
102         SH_CLK_MSTP32("hac_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 17, 0),
103         SH_CLK_MSTP32("hac_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 16, 0),
104         SH_CLK_MSTP32("i2c_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 15, 0),
105         SH_CLK_MSTP32("i2c_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 14, 0),
106         SH_CLK_MSTP32("tmu9_11_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 11, 0),
107         SH_CLK_MSTP32("tmu678_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 10, 0),
108         SH_CLK_MSTP32("tmu345_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 9, 0),
109         SH_CLK_MSTP32("tmu012_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 8, 0),
110         SH_CLK_MSTP32("sdif_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 5, 0),
111         SH_CLK_MSTP32("sdif_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 4, 0),
112         SH_CLK_MSTP32("hspi_fck", -1, &div4_clks[DIV4_P], MSTPCR0, 2, 0),
113
114         /* MSTPCR1 */
115         SH_CLK_MSTP32("usb_fck", -1, NULL, MSTPCR1, 12, 0),
116         SH_CLK_MSTP32("pcie_fck", 2, NULL, MSTPCR1, 10, 0),
117         SH_CLK_MSTP32("pcie_fck", 1, NULL, MSTPCR1, 9, 0),
118         SH_CLK_MSTP32("pcie_fck", 0, NULL, MSTPCR1, 8, 0),
119         SH_CLK_MSTP32("dmac_11_6_fck", -1, NULL, MSTPCR1, 5, 0),
120         SH_CLK_MSTP32("dmac_5_0_fck", -1, NULL, MSTPCR1, 4, 0),
121         SH_CLK_MSTP32("du_fck", -1, NULL, MSTPCR1, 3, 0),
122         SH_CLK_MSTP32("ether_fck", -1, NULL, MSTPCR1, 2, 0),
123 };
124
125 static struct clk_lookup lookups[] = {
126         {
127                 /* TMU0 */
128                 .dev_id         = "sh_tmu.0",
129                 .con_id         = "tmu_fck",
130                 .clk            = &mstp_clks[17],       /* tmu012_fck */
131         }, {
132                 /* TMU1 */
133                 .dev_id         = "sh_tmu.1",
134                 .con_id         = "tmu_fck",
135                 .clk            = &mstp_clks[17],
136         }, {
137                 /* TMU2 */
138                 .dev_id         = "sh_tmu.2",
139                 .con_id         = "tmu_fck",
140                 .clk            = &mstp_clks[17],
141         }, {
142                 /* TMU3 */
143                 .dev_id         = "sh_tmu.3",
144                 .con_id         = "tmu_fck",
145                 .clk            = &mstp_clks[16],       /* tmu345_fck */
146         }, {
147                 /* TMU4 */
148                 .dev_id         = "sh_tmu.4",
149                 .con_id         = "tmu_fck",
150                 .clk            = &mstp_clks[16],
151         }, {
152                 /* TMU5 */
153                 .dev_id         = "sh_tmu.5",
154                 .con_id         = "tmu_fck",
155                 .clk            = &mstp_clks[16],
156         }, {
157                 /* TMU6 */
158                 .dev_id         = "sh_tmu.6",
159                 .con_id         = "tmu_fck",
160                 .clk            = &mstp_clks[15],       /* tmu678_fck */
161         }, {
162                 /* TMU7 */
163                 .dev_id         = "sh_tmu.7",
164                 .con_id         = "tmu_fck",
165                 .clk            = &mstp_clks[15],
166         }, {
167                 /* TMU8 */
168                 .dev_id         = "sh_tmu.8",
169                 .con_id         = "tmu_fck",
170                 .clk            = &mstp_clks[15],
171         }, {
172                 /* TMU9 */
173                 .dev_id         = "sh_tmu.9",
174                 .con_id         = "tmu_fck",
175                 .clk            = &mstp_clks[14],       /* tmu9_11_fck */
176         }, {
177                 /* TMU10 */
178                 .dev_id         = "sh_tmu.10",
179                 .con_id         = "tmu_fck",
180                 .clk            = &mstp_clks[14],
181         }, {
182                 /* TMU11 */
183                 .dev_id         = "sh_tmu.11",
184                 .con_id         = "tmu_fck",
185                 .clk            = &mstp_clks[14],
186         }
187 };
188
189 int __init arch_clk_init(void)
190 {
191         int i, ret = 0;
192
193         for (i = 0; i < ARRAY_SIZE(clks); i++)
194                 ret |= clk_register(clks[i]);
195         for (i = 0; i < ARRAY_SIZE(lookups); i++)
196                 clkdev_add(&lookups[i]);
197
198         if (!ret)
199                 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
200                                            &div4_table);
201         if (!ret)
202                 ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks));
203
204         return ret;
205 }