1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * r8a77995 Clock Pulse Generator / Module Standby and Software Reset
4  *
5  * Copyright (C) 2017 Glider bvba
6  *
7  * Based on r8a7795-cpg-mssr.c
8  *
9  * Copyright (C) 2015 Glider bvba
10  * Copyright (C) 2015 Renesas Electronics Corp.
11  */
12 
13 #include <linux/device.h>
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/soc/renesas/rcar-rst.h>
17 
18 #include <dt-bindings/clock/r8a77995-cpg-mssr.h>
19 
20 #include "renesas-cpg-mssr.h"
21 #include "rcar-gen3-cpg.h"
22 
23 enum clk_ids {
24 	/* Core Clock Outputs exported to DT */
25 	LAST_DT_CORE_CLK = R8A77995_CLK_CPEX,
26 
27 	/* External Input Clocks */
28 	CLK_EXTAL,
29 
30 	/* Internal Core Clocks */
31 	CLK_MAIN,
32 	CLK_PLL0,
33 	CLK_PLL1,
34 	CLK_PLL3,
35 	CLK_PLL0D2,
36 	CLK_PLL0D3,
37 	CLK_PLL0D5,
38 	CLK_PLL1D2,
39 	CLK_PE,
40 	CLK_S0,
41 	CLK_S1,
42 	CLK_S2,
43 	CLK_S3,
44 	CLK_SDSRC,
45 	CLK_RPCSRC,
46 	CLK_RINT,
47 	CLK_OCO,
48 
49 	/* Module Clocks */
50 	MOD_CLK_BASE
51 };
52 
53 static const struct cpg_core_clk r8a77995_core_clks[] __initconst = {
54 	/* External Clock Inputs */
55 	DEF_INPUT("extal",     CLK_EXTAL),
56 
57 	/* Internal Core Clocks */
58 	DEF_BASE(".main",      CLK_MAIN, CLK_TYPE_GEN3_MAIN,       CLK_EXTAL),
59 	DEF_BASE(".pll1",      CLK_PLL1, CLK_TYPE_GEN3_PLL1,       CLK_MAIN),
60 	DEF_BASE(".pll3",      CLK_PLL3, CLK_TYPE_GEN3_PLL3,       CLK_MAIN),
61 
62 	DEF_FIXED(".pll0",     CLK_PLL0,           CLK_MAIN,	   4, 250),
63 	DEF_FIXED(".pll0d2",   CLK_PLL0D2,         CLK_PLL0,       2, 1),
64 	DEF_FIXED(".pll0d3",   CLK_PLL0D3,         CLK_PLL0,       3, 1),
65 	DEF_FIXED(".pll0d5",   CLK_PLL0D5,         CLK_PLL0,       5, 1),
66 	DEF_FIXED(".pll1d2",   CLK_PLL1D2,         CLK_PLL1,       2, 1),
67 	DEF_FIXED(".pe",       CLK_PE,             CLK_PLL0D3,     4, 1),
68 	DEF_FIXED(".s0",       CLK_S0,             CLK_PLL1,       2, 1),
69 	DEF_FIXED(".s1",       CLK_S1,             CLK_PLL1,       3, 1),
70 	DEF_FIXED(".s2",       CLK_S2,             CLK_PLL1,       4, 1),
71 	DEF_FIXED(".s3",       CLK_S3,             CLK_PLL1,       6, 1),
72 	DEF_FIXED(".sdsrc",    CLK_SDSRC,          CLK_PLL1,       2, 1),
73 
74 	DEF_FIXED_RPCSRC_D3(".rpcsrc", CLK_RPCSRC, CLK_PLL0, CLK_PLL1),
75 
76 	DEF_DIV6_RO(".r",      CLK_RINT,           CLK_EXTAL, CPG_RCKCR, 32),
77 
78 	DEF_RATE(".oco",       CLK_OCO,            8 * 1000 * 1000),
79 
80 	/* Core Clock Outputs */
81 	DEF_FIXED("za2",       R8A77995_CLK_ZA2,   CLK_PLL0D3,     2, 1),
82 	DEF_FIXED("z2",        R8A77995_CLK_Z2,    CLK_PLL0D3,     1, 1),
83 	DEF_FIXED("ztr",       R8A77995_CLK_ZTR,   CLK_PLL1,       6, 1),
84 	DEF_FIXED("zt",        R8A77995_CLK_ZT,    CLK_PLL1,       4, 1),
85 	DEF_FIXED("zx",        R8A77995_CLK_ZX,    CLK_PLL1,       3, 1),
86 	DEF_FIXED("s0d1",      R8A77995_CLK_S0D1,  CLK_S0,         1, 1),
87 	DEF_FIXED("s1d1",      R8A77995_CLK_S1D1,  CLK_S1,         1, 1),
88 	DEF_FIXED("s1d2",      R8A77995_CLK_S1D2,  CLK_S1,         2, 1),
89 	DEF_FIXED("s1d4",      R8A77995_CLK_S1D4,  CLK_S1,         4, 1),
90 	DEF_FIXED("s2d1",      R8A77995_CLK_S2D1,  CLK_S2,         1, 1),
91 	DEF_FIXED("s2d2",      R8A77995_CLK_S2D2,  CLK_S2,         2, 1),
92 	DEF_FIXED("s2d4",      R8A77995_CLK_S2D4,  CLK_S2,         4, 1),
93 	DEF_FIXED("s3d1",      R8A77995_CLK_S3D1,  CLK_S3,         1, 1),
94 	DEF_FIXED("s3d2",      R8A77995_CLK_S3D2,  CLK_S3,         2, 1),
95 	DEF_FIXED("s3d4",      R8A77995_CLK_S3D4,  CLK_S3,         4, 1),
96 
97 	DEF_FIXED("cl",        R8A77995_CLK_CL,    CLK_PLL1,      48, 1),
98 	DEF_FIXED("cr",        R8A77995_CLK_CR,    CLK_PLL1D2,     2, 1),
99 	DEF_FIXED("cp",        R8A77995_CLK_CP,    CLK_EXTAL,      2, 1),
100 	DEF_FIXED("cpex",      R8A77995_CLK_CPEX,  CLK_EXTAL,      4, 1),
101 
102 	DEF_DIV6_RO("osc",     R8A77995_CLK_OSC,   CLK_EXTAL, CPG_RCKCR,  8),
103 
104 	DEF_GEN3_PE("s1d4c",   R8A77995_CLK_S1D4C, CLK_S1, 4, CLK_PE, 2),
105 	DEF_GEN3_PE("s3d1c",   R8A77995_CLK_S3D1C, CLK_S3, 1, CLK_PE, 1),
106 	DEF_GEN3_PE("s3d2c",   R8A77995_CLK_S3D2C, CLK_S3, 2, CLK_PE, 2),
107 	DEF_GEN3_PE("s3d4c",   R8A77995_CLK_S3D4C, CLK_S3, 4, CLK_PE, 4),
108 
109 	DEF_GEN3_SDH("sd0h",   R8A77995_CLK_SD0H,  CLK_SDSRC,         0x268),
110 	DEF_GEN3_SD("sd0",     R8A77995_CLK_SD0,   R8A77995_CLK_SD0H, 0x268),
111 
112 	DEF_BASE("rpc",        R8A77995_CLK_RPC,   CLK_TYPE_GEN3_RPC,   CLK_RPCSRC),
113 	DEF_BASE("rpcd2",      R8A77995_CLK_RPCD2, CLK_TYPE_GEN3_RPCD2, R8A77995_CLK_RPC),
114 
115 	DEF_DIV6P1("canfd",    R8A77995_CLK_CANFD, CLK_PLL0D3,    0x244),
116 	DEF_DIV6P1("mso",      R8A77995_CLK_MSO,   CLK_PLL1D2,    0x014),
117 
118 	DEF_GEN3_RCKSEL("r",   R8A77995_CLK_R, CLK_RINT, 1, CLK_OCO, 61 * 4),
119 };
120 
121 static const struct mssr_mod_clk r8a77995_mod_clks[] __initconst = {
122 	DEF_MOD("tmu4",			 121,	R8A77995_CLK_S1D4C),
123 	DEF_MOD("tmu3",			 122,	R8A77995_CLK_S3D2C),
124 	DEF_MOD("tmu2",			 123,	R8A77995_CLK_S3D2C),
125 	DEF_MOD("tmu1",			 124,	R8A77995_CLK_S3D2C),
126 	DEF_MOD("tmu0",			 125,	R8A77995_CLK_CP),
127 	DEF_MOD("scif5",		 202,	R8A77995_CLK_S3D4C),
128 	DEF_MOD("scif4",		 203,	R8A77995_CLK_S3D4C),
129 	DEF_MOD("scif3",		 204,	R8A77995_CLK_S3D4C),
130 	DEF_MOD("scif1",		 206,	R8A77995_CLK_S3D4C),
131 	DEF_MOD("scif0",		 207,	R8A77995_CLK_S3D4C),
132 	DEF_MOD("msiof3",		 208,	R8A77995_CLK_MSO),
133 	DEF_MOD("msiof2",		 209,	R8A77995_CLK_MSO),
134 	DEF_MOD("msiof1",		 210,	R8A77995_CLK_MSO),
135 	DEF_MOD("msiof0",		 211,	R8A77995_CLK_MSO),
136 	DEF_MOD("sys-dmac2",		 217,	R8A77995_CLK_S3D1),
137 	DEF_MOD("sys-dmac1",		 218,	R8A77995_CLK_S3D1),
138 	DEF_MOD("sys-dmac0",		 219,	R8A77995_CLK_S3D1),
139 	DEF_MOD("sceg-pub",		 229,	R8A77995_CLK_CR),
140 	DEF_MOD("cmt3",			 300,	R8A77995_CLK_R),
141 	DEF_MOD("cmt2",			 301,	R8A77995_CLK_R),
142 	DEF_MOD("cmt1",			 302,	R8A77995_CLK_R),
143 	DEF_MOD("cmt0",			 303,	R8A77995_CLK_R),
144 	DEF_MOD("scif2",		 310,	R8A77995_CLK_S3D4C),
145 	DEF_MOD("emmc0",		 312,	R8A77995_CLK_SD0),
146 	DEF_MOD("usb-dmac0",		 330,	R8A77995_CLK_S3D1),
147 	DEF_MOD("usb-dmac1",		 331,	R8A77995_CLK_S3D1),
148 	DEF_MOD("rwdt",			 402,	R8A77995_CLK_R),
149 	DEF_MOD("intc-ex",		 407,	R8A77995_CLK_CP),
150 	DEF_MOD("intc-ap",		 408,	R8A77995_CLK_S1D2),
151 	DEF_MOD("audmac0",		 502,	R8A77995_CLK_S1D2),
152 	DEF_MOD("hscif3",		 517,	R8A77995_CLK_S3D1C),
153 	DEF_MOD("hscif0",		 520,	R8A77995_CLK_S3D1C),
154 	DEF_MOD("thermal",		 522,	R8A77995_CLK_CP),
155 	DEF_MOD("pwm",			 523,	R8A77995_CLK_S3D4C),
156 	DEF_MOD("fcpvd1",		 602,	R8A77995_CLK_S1D2),
157 	DEF_MOD("fcpvd0",		 603,	R8A77995_CLK_S1D2),
158 	DEF_MOD("fcpvbs",		 607,	R8A77995_CLK_S0D1),
159 	DEF_MOD("vspd1",		 622,	R8A77995_CLK_S1D2),
160 	DEF_MOD("vspd0",		 623,	R8A77995_CLK_S1D2),
161 	DEF_MOD("vspbs",		 627,	R8A77995_CLK_S0D1),
162 	DEF_MOD("ehci0",		 703,	R8A77995_CLK_S3D2),
163 	DEF_MOD("hsusb",		 704,	R8A77995_CLK_S3D2),
164 	DEF_MOD("cmm1",			 710,	R8A77995_CLK_S1D1),
165 	DEF_MOD("cmm0",			 711,	R8A77995_CLK_S1D1),
166 	DEF_MOD("du1",			 723,	R8A77995_CLK_S1D1),
167 	DEF_MOD("du0",			 724,	R8A77995_CLK_S1D1),
168 	DEF_MOD("lvds",			 727,	R8A77995_CLK_S2D1),
169 	DEF_MOD("mlp",			 802,	R8A77995_CLK_S2D1),
170 	DEF_MOD("vin4",			 807,	R8A77995_CLK_S3D1),
171 	DEF_MOD("etheravb",		 812,	R8A77995_CLK_S3D2),
172 	DEF_MOD("imr0",			 823,	R8A77995_CLK_S1D2),
173 	DEF_MOD("gpio6",		 906,	R8A77995_CLK_S3D4),
174 	DEF_MOD("gpio5",		 907,	R8A77995_CLK_S3D4),
175 	DEF_MOD("gpio4",		 908,	R8A77995_CLK_S3D4),
176 	DEF_MOD("gpio3",		 909,	R8A77995_CLK_S3D4),
177 	DEF_MOD("gpio2",		 910,	R8A77995_CLK_S3D4),
178 	DEF_MOD("gpio1",		 911,	R8A77995_CLK_S3D4),
179 	DEF_MOD("gpio0",		 912,	R8A77995_CLK_S3D4),
180 	DEF_MOD("can-fd",		 914,	R8A77995_CLK_S3D2),
181 	DEF_MOD("can-if1",		 915,	R8A77995_CLK_S3D4),
182 	DEF_MOD("can-if0",		 916,	R8A77995_CLK_S3D4),
183 	DEF_MOD("rpc-if",		 917,	R8A77995_CLK_RPCD2),
184 	DEF_MOD("adg",			 922,	R8A77995_CLK_ZA2),
185 	DEF_MOD("i2c3",			 928,	R8A77995_CLK_S3D2),
186 	DEF_MOD("i2c2",			 929,	R8A77995_CLK_S3D2),
187 	DEF_MOD("i2c1",			 930,	R8A77995_CLK_S3D2),
188 	DEF_MOD("i2c0",			 931,	R8A77995_CLK_S3D2),
189 	DEF_MOD("ssi-all",		1005,	R8A77995_CLK_S3D4),
190 	DEF_MOD("ssi4",			1011,	MOD_CLK_ID(1005)),
191 	DEF_MOD("ssi3",			1012,	MOD_CLK_ID(1005)),
192 	DEF_MOD("scu-all",		1017,	R8A77995_CLK_S3D4),
193 	DEF_MOD("scu-dvc1",		1018,	MOD_CLK_ID(1017)),
194 	DEF_MOD("scu-dvc0",		1019,	MOD_CLK_ID(1017)),
195 	DEF_MOD("scu-ctu1-mix1",	1020,	MOD_CLK_ID(1017)),
196 	DEF_MOD("scu-ctu0-mix0",	1021,	MOD_CLK_ID(1017)),
197 	DEF_MOD("scu-src6",		1025,	MOD_CLK_ID(1017)),
198 	DEF_MOD("scu-src5",		1026,	MOD_CLK_ID(1017)),
199 };
200 
201 static const unsigned int r8a77995_crit_mod_clks[] __initconst = {
202 	MOD_CLK_ID(402),	/* RWDT */
203 	MOD_CLK_ID(408),	/* INTC-AP (GIC) */
204 };
205 
206 /*
207  * CPG Clock Data
208  */
209 
210 /*
211  * MD19		EXTAL (MHz)	PLL0		PLL1		PLL3
212  *--------------------------------------------------------------------
213  * 0		48 x 1		x250/4		x100/3		x100/3
214  * 1		48 x 1		x250/4		x100/3		x58/3
215  */
216 #define CPG_PLL_CONFIG_INDEX(md)	(((md) & BIT(19)) >> 19)
217 
218 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[2] __initconst = {
219 	/* EXTAL div	PLL1 mult/div	PLL3 mult/div */
220 	{ 1,		100,	3,	100,	3,	},
221 	{ 1,		100,	3,	58,	3,	},
222 };
223 
224 static int __init r8a77995_cpg_mssr_init(struct device *dev)
225 {
226 	const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
227 	u32 cpg_mode;
228 	int error;
229 
230 	error = rcar_rst_read_mode_pins(&cpg_mode);
231 	if (error)
232 		return error;
233 
234 	cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
235 
236 	return rcar_gen3_cpg_init(cpg_pll_config, 0, cpg_mode);
237 }
238 
239 const struct cpg_mssr_info r8a77995_cpg_mssr_info __initconst = {
240 	/* Core Clocks */
241 	.core_clks = r8a77995_core_clks,
242 	.num_core_clks = ARRAY_SIZE(r8a77995_core_clks),
243 	.last_dt_core_clk = LAST_DT_CORE_CLK,
244 	.num_total_core_clks = MOD_CLK_BASE,
245 
246 	/* Module Clocks */
247 	.mod_clks = r8a77995_mod_clks,
248 	.num_mod_clks = ARRAY_SIZE(r8a77995_mod_clks),
249 	.num_hw_mod_clks = 12 * 32,
250 
251 	/* Critical Module Clocks */
252 	.crit_mod_clks = r8a77995_crit_mod_clks,
253 	.num_crit_mod_clks = ARRAY_SIZE(r8a77995_crit_mod_clks),
254 
255 	/* Callbacks */
256 	.init = r8a77995_cpg_mssr_init,
257 	.cpg_clk_register = rcar_gen3_cpg_clk_register,
258 };
259