jz4755-cgu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Ingenic JZ4755 SoC CGU driver
   4  * Heavily based on JZ4725b CGU driver
   5  *
   6  * Copyright (C) 2022 Siarhei Volkau
   7  * Author: Siarhei Volkau <lis8215@gmail.com>
   8  */
   9
  10 #include <linux/clk-provider.h>
  11 #include <linux/delay.h>
  12 #include <linux/of.h>
  13
  14 #include <dt-bindings/clock/ingenic,jz4755-cgu.h>
  15
  16 #include "cgu.h"
  17 #include "pm.h"
  18
  19 /* CGU register offsets */
  20 #define CGU_REG_CPCCR           0x00
  21 #define CGU_REG_CPPCR           0x10
  22 #define CGU_REG_CLKGR           0x20
  23 #define CGU_REG_OPCR            0x24
  24 #define CGU_REG_I2SCDR          0x60
  25 #define CGU_REG_LPCDR           0x64
  26 #define CGU_REG_MSCCDR          0x68
  27 #define CGU_REG_SSICDR          0x74
  28 #define CGU_REG_CIMCDR          0x7C
  29
  30 static struct ingenic_cgu *cgu;
  31
  32 static const s8 pll_od_encoding[4] = {
  33         0x0, 0x1, -1, 0x3,
  34 };
  35
  36 static const u8 jz4755_cgu_cpccr_div_table[] = {
  37         1, 2, 3, 4, 6, 8,
  38 };
  39
  40 static const u8 jz4755_cgu_pll_half_div_table[] = {
  41         2, 1,
  42 };
  43
  44 static const struct ingenic_cgu_clk_info jz4755_cgu_clocks[] = {
  45
  46         /* External clocks */
  47
  48         [JZ4755_CLK_EXT] = { "ext", CGU_CLK_EXT },
  49         [JZ4755_CLK_OSC32K] = { "osc32k", CGU_CLK_EXT },
  50
  51         [JZ4755_CLK_PLL] = {
  52                 "pll", CGU_CLK_PLL,
  53                 .parents = { JZ4755_CLK_EXT, },
  54                 .pll = {
  55                         .reg = CGU_REG_CPPCR,
  56                         .rate_multiplier = 1,
  57                         .m_shift = 23,
  58                         .m_bits = 9,
  59                         .m_offset = 2,
  60                         .n_shift = 18,
  61                         .n_bits = 5,
  62                         .n_offset = 2,
  63                         .od_shift = 16,
  64                         .od_bits = 2,
  65                         .od_max = 4,
  66                         .od_encoding = pll_od_encoding,
  67                         .stable_bit = 10,
  68                         .bypass_reg = CGU_REG_CPPCR,
  69                         .bypass_bit = 9,
  70                         .enable_bit = 8,
  71                 },
  72         },
  73
  74         /* Muxes & dividers */
  75
  76         [JZ4755_CLK_PLL_HALF] = {
  77                 "pll half", CGU_CLK_DIV,
  78                 .parents = { JZ4755_CLK_PLL, },
  79                 .div = {
  80                         CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1, 0,
  81                         jz4755_cgu_pll_half_div_table,
  82                 },
  83         },
  84
  85         [JZ4755_CLK_EXT_HALF] = {
  86                 "ext half", CGU_CLK_DIV,
  87                 .parents = { JZ4755_CLK_EXT, },
  88                 .div = {
  89                         CGU_REG_CPCCR, 30, 1, 1, -1, -1, -1, 0,
  90                         NULL,
  91                 },
  92         },
  93
  94         [JZ4755_CLK_CCLK] = {
  95                 "cclk", CGU_CLK_DIV,
  96                 .parents = { JZ4755_CLK_PLL, },
  97                 .div = {
  98                         CGU_REG_CPCCR, 0, 1, 4, 22, -1, -1, 0,
  99                         jz4755_cgu_cpccr_div_table,
 100                 },
 101         },
 102
 103         [JZ4755_CLK_H0CLK] = {
 104                 "hclk", CGU_CLK_DIV,
 105                 .parents = { JZ4755_CLK_PLL, },
 106                 .div = {
 107                         CGU_REG_CPCCR, 4, 1, 4, 22, -1, -1, 0,
 108                         jz4755_cgu_cpccr_div_table,
 109                 },
 110         },
 111
 112         [JZ4755_CLK_PCLK] = {
 113                 "pclk", CGU_CLK_DIV,
 114                 .parents = { JZ4755_CLK_PLL, },
 115                 .div = {
 116                         CGU_REG_CPCCR, 8, 1, 4, 22, -1, -1, 0,
 117                         jz4755_cgu_cpccr_div_table,
 118                 },
 119         },
 120
 121         [JZ4755_CLK_MCLK] = {
 122                 "mclk", CGU_CLK_DIV,
 123                 .parents = { JZ4755_CLK_PLL, },
 124                 .div = {
 125                         CGU_REG_CPCCR, 12, 1, 4, 22, -1, -1, 0,
 126                         jz4755_cgu_cpccr_div_table,
 127                 },
 128         },
 129
 130         [JZ4755_CLK_H1CLK] = {
 131                 "h1clk", CGU_CLK_DIV,
 132                 .parents = { JZ4755_CLK_PLL, },
 133                 .div = {
 134                         CGU_REG_CPCCR, 16, 1, 4, 22, -1, -1, 0,
 135                         jz4755_cgu_cpccr_div_table,
 136                 },
 137         },
 138
 139         [JZ4755_CLK_UDC] = {
 140                 "udc", CGU_CLK_MUX | CGU_CLK_DIV | CGU_CLK_GATE,
 141                 .parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
 142                 .mux = { CGU_REG_CPCCR, 29, 1 },
 143                 .div = { CGU_REG_CPCCR, 23, 1, 6, -1, -1, -1 },
 144                 .gate = { CGU_REG_CLKGR, 10 },
 145         },
 146
 147         [JZ4755_CLK_LCD] = {
 148                 "lcd", CGU_CLK_DIV | CGU_CLK_GATE,
 149                 .parents = { JZ4755_CLK_PLL_HALF, },
 150                 .div = { CGU_REG_LPCDR, 0, 1, 11, -1, -1, -1 },
 151                 .gate = { CGU_REG_CLKGR, 9 },
 152         },
 153
 154         [JZ4755_CLK_MMC] = {
 155                 "mmc", CGU_CLK_DIV,
 156                 .parents = { JZ4755_CLK_PLL_HALF, },
 157                 .div = { CGU_REG_MSCCDR, 0, 1, 5, -1, -1, -1 },
 158         },
 159
 160         [JZ4755_CLK_I2S] = {
 161                 "i2s", CGU_CLK_MUX | CGU_CLK_DIV,
 162                 .parents = { JZ4755_CLK_EXT_HALF, JZ4755_CLK_PLL_HALF, },
 163                 .mux = { CGU_REG_CPCCR, 31, 1 },
 164                 .div = { CGU_REG_I2SCDR, 0, 1, 9, -1, -1, -1 },
 165         },
 166
 167         [JZ4755_CLK_SPI] = {
 168                 "spi", CGU_CLK_DIV | CGU_CLK_GATE,
 169                 .parents = { JZ4755_CLK_PLL_HALF, },
 170                 .div = { CGU_REG_SSICDR, 0, 1, 4, -1, -1, -1 },
 171                 .gate = { CGU_REG_CLKGR, 4 },
 172         },
 173
 174         [JZ4755_CLK_TVE] = {
 175                 "tve", CGU_CLK_MUX | CGU_CLK_GATE,
 176                 .parents = { JZ4755_CLK_LCD, JZ4755_CLK_EXT, },
 177                 .mux = { CGU_REG_LPCDR, 31, 1 },
 178                 .gate = { CGU_REG_CLKGR, 18 },
 179         },
 180
 181         [JZ4755_CLK_RTC] = {
 182                 "rtc", CGU_CLK_MUX | CGU_CLK_GATE,
 183                 .parents = { JZ4755_CLK_EXT512, JZ4755_CLK_OSC32K, },
 184                 .mux = { CGU_REG_OPCR, 2, 1},
 185                 .gate = { CGU_REG_CLKGR, 2 },
 186         },
 187
 188         [JZ4755_CLK_CIM] = {
 189                 "cim", CGU_CLK_DIV | CGU_CLK_GATE,
 190                 .parents = { JZ4755_CLK_PLL_HALF, },
 191                 .div = { CGU_REG_CIMCDR, 0, 1, 8, -1, -1, -1 },
 192                 .gate = { CGU_REG_CLKGR, 8 },
 193         },
 194
 195         /* Gate-only clocks */
 196
 197         [JZ4755_CLK_UART0] = {
 198                 "uart0", CGU_CLK_GATE,
 199                 .parents = { JZ4755_CLK_EXT_HALF, },
 200                 .gate = { CGU_REG_CLKGR, 0 },
 201         },
 202
 203         [JZ4755_CLK_UART1] = {
 204                 "uart1", CGU_CLK_GATE,
 205                 .parents = { JZ4755_CLK_EXT_HALF, },
 206                 .gate = { CGU_REG_CLKGR, 14 },
 207         },
 208
 209         [JZ4755_CLK_UART2] = {
 210                 "uart2", CGU_CLK_GATE,
 211                 .parents = { JZ4755_CLK_EXT_HALF, },
 212                 .gate = { CGU_REG_CLKGR, 15 },
 213         },
 214
 215         [JZ4755_CLK_ADC] = {
 216                 "adc", CGU_CLK_GATE,
 217                 .parents = { JZ4755_CLK_EXT_HALF, },
 218                 .gate = { CGU_REG_CLKGR, 7 },
 219         },
 220
 221         [JZ4755_CLK_AIC] = {
 222                 "aic", CGU_CLK_GATE,
 223                 .parents = { JZ4755_CLK_EXT_HALF, },
 224                 .gate = { CGU_REG_CLKGR, 5 },
 225         },
 226
 227         [JZ4755_CLK_I2C] = {
 228                 "i2c", CGU_CLK_GATE,
 229                 .parents = { JZ4755_CLK_EXT_HALF, },
 230                 .gate = { CGU_REG_CLKGR, 3 },
 231         },
 232
 233         [JZ4755_CLK_BCH] = {
 234                 "bch", CGU_CLK_GATE,
 235                 .parents = { JZ4755_CLK_H1CLK, },
 236                 .gate = { CGU_REG_CLKGR, 11 },
 237         },
 238
 239         [JZ4755_CLK_TCU] = {
 240                 "tcu", CGU_CLK_GATE,
 241                 .parents = { JZ4755_CLK_EXT, },
 242                 .gate = { CGU_REG_CLKGR, 1 },
 243         },
 244
 245         [JZ4755_CLK_DMA] = {
 246                 "dma", CGU_CLK_GATE,
 247                 .parents = { JZ4755_CLK_PCLK, },
 248                 .gate = { CGU_REG_CLKGR, 12 },
 249         },
 250
 251         [JZ4755_CLK_MMC0] = {
 252                 "mmc0", CGU_CLK_GATE,
 253                 .parents = { JZ4755_CLK_MMC, },
 254                 .gate = { CGU_REG_CLKGR, 6 },
 255         },
 256
 257         [JZ4755_CLK_MMC1] = {
 258                 "mmc1", CGU_CLK_GATE,
 259                 .parents = { JZ4755_CLK_MMC, },
 260                 .gate = { CGU_REG_CLKGR, 16 },
 261         },
 262
 263         [JZ4755_CLK_AUX_CPU] = {
 264                 "aux_cpu", CGU_CLK_GATE,
 265                 .parents = { JZ4755_CLK_H1CLK, },
 266                 .gate = { CGU_REG_CLKGR, 24 },
 267         },
 268
 269         [JZ4755_CLK_AHB1] = {
 270                 "ahb1", CGU_CLK_GATE,
 271                 .parents = { JZ4755_CLK_H1CLK, },
 272                 .gate = { CGU_REG_CLKGR, 23 },
 273         },
 274
 275         [JZ4755_CLK_IDCT] = {
 276                 "idct", CGU_CLK_GATE,
 277                 .parents = { JZ4755_CLK_H1CLK, },
 278                 .gate = { CGU_REG_CLKGR, 22 },
 279         },
 280
 281         [JZ4755_CLK_DB] = {
 282                 "db", CGU_CLK_GATE,
 283                 .parents = { JZ4755_CLK_H1CLK, },
 284                 .gate = { CGU_REG_CLKGR, 21 },
 285         },
 286
 287         [JZ4755_CLK_ME] = {
 288                 "me", CGU_CLK_GATE,
 289                 .parents = { JZ4755_CLK_H1CLK, },
 290                 .gate = { CGU_REG_CLKGR, 20 },
 291         },
 292
 293         [JZ4755_CLK_MC] = {
 294                 "mc", CGU_CLK_GATE,
 295                 .parents = { JZ4755_CLK_H1CLK, },
 296                 .gate = { CGU_REG_CLKGR, 19 },
 297         },
 298
 299         [JZ4755_CLK_TSSI] = {
 300                 "tssi", CGU_CLK_GATE,
 301                 .parents = { JZ4755_CLK_EXT_HALF/* not sure */, },
 302                 .gate = { CGU_REG_CLKGR, 17 },
 303         },
 304
 305         [JZ4755_CLK_IPU] = {
 306                 "ipu", CGU_CLK_GATE,
 307                 .parents = { JZ4755_CLK_PLL_HALF/* not sure */, },
 308                 .gate = { CGU_REG_CLKGR, 13 },
 309         },
 310
 311         [JZ4755_CLK_EXT512] = {
 312                 "ext/512", CGU_CLK_FIXDIV,
 313                 .parents = { JZ4755_CLK_EXT, },
 314
 315                 .fixdiv = { 512 },
 316         },
 317
 318         [JZ4755_CLK_UDC_PHY] = {
 319                 "udc_phy", CGU_CLK_GATE,
 320                 .parents = { JZ4755_CLK_EXT_HALF, },
 321                 .gate = { CGU_REG_OPCR, 6, true },
 322         },
 323 };
 324
 325 static void __init jz4755_cgu_init(struct device_node *np)
 326 {
 327         int retval;
 328
 329         cgu = ingenic_cgu_new(jz4755_cgu_clocks,
 330                               ARRAY_SIZE(jz4755_cgu_clocks), np);
 331         if (!cgu) {
 332                 pr_err("%s: failed to initialise CGU\n", __func__);
 333                 return;
 334         }
 335
 336         retval = ingenic_cgu_register_clocks(cgu);
 337         if (retval)
 338                 pr_err("%s: failed to register CGU Clocks\n", __func__);
 339
 340         ingenic_cgu_register_syscore_ops(cgu);
 341 }
 342 /*
 343  * CGU has some children devices, this is useful for probing children devices
 344  * in the case where the device node is compatible with "simple-mfd".
 345  */
 346 CLK_OF_DECLARE_DRIVER(jz4755_cgu, "ingenic,jz4755-cgu", jz4755_cgu_init);