2 * Copyright (c) 2015 Endless Mobile, Inc.
3 * Author: Carlo Caione <carlo@endlessm.com>
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <linux/clk-provider.h>
19 #include <linux/kernel.h>
21 #include <linux/of_address.h>
22 #include <linux/slab.h>
23 #include <dt-bindings/clock/meson8b-clkc.h>
28 * Clock controller register offsets
30 * Register offsets from the HardKernel[0] data sheet are listed in comment
31 * blocks below. Those offsets must be multiplied by 4 before adding them to
32 * the base address to get the right value
34 * [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf
36 #define MESON8B_REG_SYS_CPU_CNTL1 0x015c /* 0x57 offset in data sheet */
37 #define MESON8B_REG_HHI_MPEG 0x0174 /* 0x5d offset in data sheet */
38 #define MESON8B_REG_MALI 0x01b0 /* 0x6c offset in data sheet */
39 #define MESON8B_REG_PLL_FIXED 0x0280
40 #define MESON8B_REG_PLL_SYS 0x0300
41 #define MESON8B_REG_PLL_VID 0x0320
43 static const struct pll_rate_table sys_pll_rate_table[] = {
44 PLL_RATE(312000000, 52, 1, 2),
45 PLL_RATE(336000000, 56, 1, 2),
46 PLL_RATE(360000000, 60, 1, 2),
47 PLL_RATE(384000000, 64, 1, 2),
48 PLL_RATE(408000000, 68, 1, 2),
49 PLL_RATE(432000000, 72, 1, 2),
50 PLL_RATE(456000000, 76, 1, 2),
51 PLL_RATE(480000000, 80, 1, 2),
52 PLL_RATE(504000000, 84, 1, 2),
53 PLL_RATE(528000000, 88, 1, 2),
54 PLL_RATE(552000000, 92, 1, 2),
55 PLL_RATE(576000000, 96, 1, 2),
56 PLL_RATE(600000000, 50, 1, 1),
57 PLL_RATE(624000000, 52, 1, 1),
58 PLL_RATE(648000000, 54, 1, 1),
59 PLL_RATE(672000000, 56, 1, 1),
60 PLL_RATE(696000000, 58, 1, 1),
61 PLL_RATE(720000000, 60, 1, 1),
62 PLL_RATE(744000000, 62, 1, 1),
63 PLL_RATE(768000000, 64, 1, 1),
64 PLL_RATE(792000000, 66, 1, 1),
65 PLL_RATE(816000000, 68, 1, 1),
66 PLL_RATE(840000000, 70, 1, 1),
67 PLL_RATE(864000000, 72, 1, 1),
68 PLL_RATE(888000000, 74, 1, 1),
69 PLL_RATE(912000000, 76, 1, 1),
70 PLL_RATE(936000000, 78, 1, 1),
71 PLL_RATE(960000000, 80, 1, 1),
72 PLL_RATE(984000000, 82, 1, 1),
73 PLL_RATE(1008000000, 84, 1, 1),
74 PLL_RATE(1032000000, 86, 1, 1),
75 PLL_RATE(1056000000, 88, 1, 1),
76 PLL_RATE(1080000000, 90, 1, 1),
77 PLL_RATE(1104000000, 92, 1, 1),
78 PLL_RATE(1128000000, 94, 1, 1),
79 PLL_RATE(1152000000, 96, 1, 1),
80 PLL_RATE(1176000000, 98, 1, 1),
81 PLL_RATE(1200000000, 50, 1, 0),
82 PLL_RATE(1224000000, 51, 1, 0),
83 PLL_RATE(1248000000, 52, 1, 0),
84 PLL_RATE(1272000000, 53, 1, 0),
85 PLL_RATE(1296000000, 54, 1, 0),
86 PLL_RATE(1320000000, 55, 1, 0),
87 PLL_RATE(1344000000, 56, 1, 0),
88 PLL_RATE(1368000000, 57, 1, 0),
89 PLL_RATE(1392000000, 58, 1, 0),
90 PLL_RATE(1416000000, 59, 1, 0),
91 PLL_RATE(1440000000, 60, 1, 0),
92 PLL_RATE(1464000000, 61, 1, 0),
93 PLL_RATE(1488000000, 62, 1, 0),
94 PLL_RATE(1512000000, 63, 1, 0),
95 PLL_RATE(1536000000, 64, 1, 0),
99 static const struct clk_div_table cpu_div_table[] = {
100 { .val = 1, .div = 1 },
101 { .val = 2, .div = 2 },
102 { .val = 3, .div = 3 },
103 { .val = 2, .div = 4 },
104 { .val = 3, .div = 6 },
105 { .val = 4, .div = 8 },
106 { .val = 5, .div = 10 },
107 { .val = 6, .div = 12 },
108 { .val = 7, .div = 14 },
109 { .val = 8, .div = 16 },
113 PNAME(p_fclk_div) = { "fixed_pll" };
114 PNAME(p_cpu_clk) = { "sys_pll" };
115 PNAME(p_clk81) = { "fclk_div3", "fclk_div4", "fclk_div5" };
116 PNAME(p_mali) = { "fclk_div3", "fclk_div4", "fclk_div5",
117 "fclk_div7", "zero" };
119 static u32 mux_table_clk81[] = { 6, 5, 7 };
120 static u32 mux_table_mali[] = { 6, 5, 7, 4, 0 };
122 static const struct composite_conf clk81_conf __initconst = {
123 .mux_table = mux_table_clk81,
124 .mux_flags = CLK_MUX_READ_ONLY,
125 .mux_parm = PARM(0x00, 12, 3),
126 .div_parm = PARM(0x00, 0, 7),
127 .gate_parm = PARM(0x00, 7, 1),
130 static const struct composite_conf mali_conf __initconst = {
131 .mux_table = mux_table_mali,
132 .mux_parm = PARM(0x00, 9, 3),
133 .div_parm = PARM(0x00, 0, 7),
134 .gate_parm = PARM(0x00, 8, 1),
137 static struct clk_fixed_rate meson8b_xtal = {
138 .fixed_rate = 24000000,
139 .hw.init = &(struct clk_init_data){
142 .ops = &clk_fixed_rate_ops,
146 static struct clk_fixed_rate meson8b_zero = {
148 .hw.init = &(struct clk_init_data){
151 .ops = &clk_fixed_rate_ops,
155 static struct meson_clk_pll meson8b_fixed_pll = {
157 .reg_off = MESON8B_REG_PLL_FIXED,
162 .reg_off = MESON8B_REG_PLL_FIXED,
167 .reg_off = MESON8B_REG_PLL_FIXED,
172 .hw.init = &(struct clk_init_data){
174 .ops = &meson_clk_pll_ro_ops,
175 .parent_names = (const char *[]){ "xtal" },
177 .flags = CLK_GET_RATE_NOCACHE,
181 static struct meson_clk_pll meson8b_vid_pll = {
183 .reg_off = MESON8B_REG_PLL_VID,
188 .reg_off = MESON8B_REG_PLL_VID,
193 .reg_off = MESON8B_REG_PLL_VID,
198 .hw.init = &(struct clk_init_data){
200 .ops = &meson_clk_pll_ro_ops,
201 .parent_names = (const char *[]){ "xtal" },
203 .flags = CLK_GET_RATE_NOCACHE,
207 static struct meson_clk_pll meson8b_sys_pll = {
209 .reg_off = MESON8B_REG_PLL_SYS,
214 .reg_off = MESON8B_REG_PLL_SYS,
219 .reg_off = MESON8B_REG_PLL_SYS,
223 .rate_table = sys_pll_rate_table,
224 .rate_count = ARRAY_SIZE(sys_pll_rate_table),
226 .hw.init = &(struct clk_init_data){
228 .ops = &meson_clk_pll_ops,
229 .parent_names = (const char *[]){ "xtal" },
231 .flags = CLK_GET_RATE_NOCACHE,
235 static const struct clk_conf meson8b_clk_confs[] __initconst = {
236 FIXED_FACTOR_DIV(CLKID_FCLK_DIV2, "fclk_div2", p_fclk_div, 0, 2),
237 FIXED_FACTOR_DIV(CLKID_FCLK_DIV3, "fclk_div3", p_fclk_div, 0, 3),
238 FIXED_FACTOR_DIV(CLKID_FCLK_DIV4, "fclk_div4", p_fclk_div, 0, 4),
239 FIXED_FACTOR_DIV(CLKID_FCLK_DIV5, "fclk_div5", p_fclk_div, 0, 5),
240 FIXED_FACTOR_DIV(CLKID_FCLK_DIV7, "fclk_div7", p_fclk_div, 0, 7),
241 CPU(MESON8B_REG_SYS_CPU_CNTL1, CLKID_CPUCLK, "a5_clk", p_cpu_clk,
243 COMPOSITE(MESON8B_REG_HHI_MPEG, CLKID_CLK81, "clk81", p_clk81,
244 CLK_SET_RATE_NO_REPARENT | CLK_IGNORE_UNUSED, &clk81_conf),
245 COMPOSITE(MESON8B_REG_MALI, CLKID_MALI, "mali", p_mali,
246 CLK_IGNORE_UNUSED, &mali_conf),
250 * FIXME we cannot register two providers w/o breaking things. Luckily only
251 * clk81 is actually used by any drivers. Convert clk81 to use
252 * clk_hw_onecell_data last and flip the switch to call of_clk_add_hw_provider
253 * instead of of_clk_add_provider in the clk81 conversion patch to keep from
254 * breaking bisect. Then delete this comment ;-)
256 static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
258 [CLKID_XTAL] = &meson8b_xtal.hw,
259 [CLKID_ZERO] = &meson8b_zero.hw,
260 [CLKID_PLL_FIXED] = &meson8b_fixed_pll.hw,
261 [CLKID_PLL_VID] = &meson8b_vid_pll.hw,
262 [CLKID_PLL_SYS] = &meson8b_sys_pll.hw,
267 static struct meson_clk_pll *const meson8b_clk_plls[] = {
273 static void __init meson8b_clkc_init(struct device_node *np)
275 void __iomem *clk_base;
278 if (!meson_clk_init(np, CLK_NR_CLKS))
281 /* Generic clocks and PLLs */
282 clk_base = of_iomap(np, 1);
284 pr_err("%s: Unable to map clk base\n", __func__);
288 /* Populate base address for PLLs */
289 for (i = 0; i < ARRAY_SIZE(meson8b_clk_plls); i++)
290 meson8b_clk_plls[i]->base = clk_base;
294 * CLKID_UNUSED = 0, so skip it and start with CLKID_XTAL = 1
296 for (clkid = CLKID_XTAL; clkid < CLK_NR_CLKS; clkid++) {
297 /* array might be sparse */
298 if (!meson8b_hw_onecell_data.hws[clkid])
301 /* FIXME convert to devm_clk_register */
302 ret = clk_hw_register(NULL, meson8b_hw_onecell_data.hws[clkid]);
307 meson_clk_register_clks(meson8b_clk_confs,
308 ARRAY_SIZE(meson8b_clk_confs),
312 /* FIXME remove after converting to platform_driver/devm_clk_register */
314 for (clkid = CLK_NR_CLKS - 1; clkid >= 0; clkid--)
315 clk_hw_unregister(meson8b_hw_onecell_data.hws[clkid]);
317 CLK_OF_DECLARE(meson8b_clock, "amlogic,meson8b-clkc", meson8b_clkc_init);