drivers/clk/spear/spear6xx_clock.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * SPEAr6xx machines clock framework source file
   4  *
   5  * Copyright (C) 2012 ST Microelectronics
   6  * Viresh Kumar <vireshk@kernel.org>
   7  */
   8
   9 #include <linux/clkdev.h>
  10 #include <linux/clk/spear.h>
  11 #include <linux/io.h>
  12 #include <linux/spinlock_types.h>
  13 #include "clk.h"
  14
  15 static DEFINE_SPINLOCK(_lock);
  16
  17 #define PLL1_CTR                        (misc_base + 0x008)
  18 #define PLL1_FRQ                        (misc_base + 0x00C)
  19 #define PLL2_CTR                        (misc_base + 0x014)
  20 #define PLL2_FRQ                        (misc_base + 0x018)
  21 #define PLL_CLK_CFG                     (misc_base + 0x020)
  22         /* PLL_CLK_CFG register masks */
  23         #define MCTR_CLK_SHIFT          28
  24         #define MCTR_CLK_MASK           3
  25
  26 #define CORE_CLK_CFG                    (misc_base + 0x024)
  27         /* CORE CLK CFG register masks */
  28         #define HCLK_RATIO_SHIFT        10
  29         #define HCLK_RATIO_MASK         2
  30         #define PCLK_RATIO_SHIFT        8
  31         #define PCLK_RATIO_MASK         2
  32
  33 #define PERIP_CLK_CFG                   (misc_base + 0x028)
  34         /* PERIP_CLK_CFG register masks */
  35         #define CLCD_CLK_SHIFT          2
  36         #define CLCD_CLK_MASK           2
  37         #define UART_CLK_SHIFT          4
  38         #define UART_CLK_MASK           1
  39         #define FIRDA_CLK_SHIFT         5
  40         #define FIRDA_CLK_MASK          2
  41         #define GPT0_CLK_SHIFT          8
  42         #define GPT1_CLK_SHIFT          10
  43         #define GPT2_CLK_SHIFT          11
  44         #define GPT3_CLK_SHIFT          12
  45         #define GPT_CLK_MASK            1
  46
  47 #define PERIP1_CLK_ENB                  (misc_base + 0x02C)
  48         /* PERIP1_CLK_ENB register masks */
  49         #define UART0_CLK_ENB           3
  50         #define UART1_CLK_ENB           4
  51         #define SSP0_CLK_ENB            5
  52         #define SSP1_CLK_ENB            6
  53         #define I2C_CLK_ENB             7
  54         #define JPEG_CLK_ENB            8
  55         #define FSMC_CLK_ENB            9
  56         #define FIRDA_CLK_ENB           10
  57         #define GPT2_CLK_ENB            11
  58         #define GPT3_CLK_ENB            12
  59         #define GPIO2_CLK_ENB           13
  60         #define SSP2_CLK_ENB            14
  61         #define ADC_CLK_ENB             15
  62         #define GPT1_CLK_ENB            11
  63         #define RTC_CLK_ENB             17
  64         #define GPIO1_CLK_ENB           18
  65         #define DMA_CLK_ENB             19
  66         #define SMI_CLK_ENB             21
  67         #define CLCD_CLK_ENB            22
  68         #define GMAC_CLK_ENB            23
  69         #define USBD_CLK_ENB            24
  70         #define USBH0_CLK_ENB           25
  71         #define USBH1_CLK_ENB           26
  72
  73 #define PRSC0_CLK_CFG                   (misc_base + 0x044)
  74 #define PRSC1_CLK_CFG                   (misc_base + 0x048)
  75 #define PRSC2_CLK_CFG                   (misc_base + 0x04C)
  76
  77 #define CLCD_CLK_SYNT                   (misc_base + 0x05C)
  78 #define FIRDA_CLK_SYNT                  (misc_base + 0x060)
  79 #define UART_CLK_SYNT                   (misc_base + 0x064)
  80
  81 /* vco rate configuration table, in ascending order of rates */
  82 static struct pll_rate_tbl pll_rtbl[] = {
  83         {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */
  84         {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */
  85         {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */
  86 };
  87
  88 /* aux rate configuration table, in ascending order of rates */
  89 static struct aux_rate_tbl aux_rtbl[] = {
  90         /* For PLL1 = 332 MHz */
  91         {.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 MHz */
  92         {.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */
  93         {.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */
  94         {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */
  95 };
  96
  97 static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", };
  98 static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", };
  99 static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", };
 100 static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", };
 101 static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", };
 102 static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", };
 103 static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none",
 104         "pll2_clk", };
 105
 106 /* gpt rate configuration table, in ascending order of rates */
 107 static struct gpt_rate_tbl gpt_rtbl[] = {
 108         /* For pll1 = 332 MHz */
 109         {.mscale = 4, .nscale = 0}, /* 41.5 MHz */
 110         {.mscale = 2, .nscale = 0}, /* 55.3 MHz */
 111         {.mscale = 1, .nscale = 0}, /* 83 MHz */
 112 };
 113
 114 void __init spear6xx_clk_init(void __iomem *misc_base)
 115 {
 116         struct clk *clk, *clk1;
 117
 118         clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, 0, 32000);
 119         clk_register_clkdev(clk, "osc_32k_clk", NULL);
 120
 121         clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, 0, 30000000);
 122         clk_register_clkdev(clk, "osc_30m_clk", NULL);
 123
 124         /* clock derived from 32 KHz osc clk */
 125         clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0,
 126                         PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock);
 127         clk_register_clkdev(clk, NULL, "rtc-spear");
 128
 129         /* clock derived from 30 MHz osc clk */
 130         clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0,
 131                         48000000);
 132         clk_register_clkdev(clk, "pll3_clk", NULL);
 133
 134         clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk",
 135                         0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
 136                         &_lock, &clk1, NULL);
 137         clk_register_clkdev(clk, "vco1_clk", NULL);
 138         clk_register_clkdev(clk1, "pll1_clk", NULL);
 139
 140         clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk",
 141                         0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl),
 142                         &_lock, &clk1, NULL);
 143         clk_register_clkdev(clk, "vco2_clk", NULL);
 144         clk_register_clkdev(clk1, "pll2_clk", NULL);
 145
 146         clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1,
 147                         1);
 148         clk_register_clkdev(clk, NULL, "fc880000.wdt");
 149
 150         /* clock derived from pll1 clk */
 151         clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk",
 152                         CLK_SET_RATE_PARENT, 1, 1);
 153         clk_register_clkdev(clk, "cpu_clk", NULL);
 154
 155         clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk",
 156                         CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT,
 157                         HCLK_RATIO_MASK, 0, &_lock);
 158         clk_register_clkdev(clk, "ahb_clk", NULL);
 159
 160         clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0,
 161                         UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
 162                         &_lock, &clk1);
 163         clk_register_clkdev(clk, "uart_syn_clk", NULL);
 164         clk_register_clkdev(clk1, "uart_syn_gclk", NULL);
 165
 166         clk = clk_register_mux(NULL, "uart_mclk", uart_parents,
 167                         ARRAY_SIZE(uart_parents), CLK_SET_RATE_NO_REPARENT,
 168                         PERIP_CLK_CFG, UART_CLK_SHIFT, UART_CLK_MASK, 0,
 169                         &_lock);
 170         clk_register_clkdev(clk, "uart_mclk", NULL);
 171
 172         clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB,
 173                         UART0_CLK_ENB, 0, &_lock);
 174         clk_register_clkdev(clk, NULL, "d0000000.serial");
 175
 176         clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB,
 177                         UART1_CLK_ENB, 0, &_lock);
 178         clk_register_clkdev(clk, NULL, "d0080000.serial");
 179
 180         clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk",
 181                         0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
 182                         &_lock, &clk1);
 183         clk_register_clkdev(clk, "firda_syn_clk", NULL);
 184         clk_register_clkdev(clk1, "firda_syn_gclk", NULL);
 185
 186         clk = clk_register_mux(NULL, "firda_mclk", firda_parents,
 187                         ARRAY_SIZE(firda_parents), CLK_SET_RATE_NO_REPARENT,
 188                         PERIP_CLK_CFG, FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0,
 189                         &_lock);
 190         clk_register_clkdev(clk, "firda_mclk", NULL);
 191
 192         clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0,
 193                         PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock);
 194         clk_register_clkdev(clk, NULL, "firda");
 195
 196         clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk",
 197                         0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl),
 198                         &_lock, &clk1);
 199         clk_register_clkdev(clk, "clcd_syn_clk", NULL);
 200         clk_register_clkdev(clk1, "clcd_syn_gclk", NULL);
 201
 202         clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents,
 203                         ARRAY_SIZE(clcd_parents), CLK_SET_RATE_NO_REPARENT,
 204                         PERIP_CLK_CFG, CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0,
 205                         &_lock);
 206         clk_register_clkdev(clk, "clcd_mclk", NULL);
 207
 208         clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0,
 209                         PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock);
 210         clk_register_clkdev(clk, NULL, "fc200000.clcd");
 211
 212         /* gpt clocks */
 213         clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG,
 214                         gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
 215         clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL);
 216
 217         clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents,
 218                         ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT,
 219                         PERIP_CLK_CFG, GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
 220         clk_register_clkdev(clk, NULL, "gpt0");
 221
 222         clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents,
 223                         ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT,
 224                         PERIP_CLK_CFG, GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
 225         clk_register_clkdev(clk, "gpt1_mclk", NULL);
 226
 227         clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0,
 228                         PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock);
 229         clk_register_clkdev(clk, NULL, "gpt1");
 230
 231         clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG,
 232                         gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
 233         clk_register_clkdev(clk, "gpt2_syn_clk", NULL);
 234
 235         clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents,
 236                         ARRAY_SIZE(gpt2_parents), CLK_SET_RATE_NO_REPARENT,
 237                         PERIP_CLK_CFG, GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
 238         clk_register_clkdev(clk, "gpt2_mclk", NULL);
 239
 240         clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0,
 241                         PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock);
 242         clk_register_clkdev(clk, NULL, "gpt2");
 243
 244         clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG,
 245                         gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock);
 246         clk_register_clkdev(clk, "gpt3_syn_clk", NULL);
 247
 248         clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents,
 249                         ARRAY_SIZE(gpt3_parents), CLK_SET_RATE_NO_REPARENT,
 250                         PERIP_CLK_CFG, GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock);
 251         clk_register_clkdev(clk, "gpt3_mclk", NULL);
 252
 253         clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0,
 254                         PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock);
 255         clk_register_clkdev(clk, NULL, "gpt3");
 256
 257         /* clock derived from pll3 clk */
 258         clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0,
 259                         PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock);
 260         clk_register_clkdev(clk, NULL, "e1800000.ehci");
 261         clk_register_clkdev(clk, NULL, "e1900000.ohci");
 262
 263         clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0,
 264                         PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock);
 265         clk_register_clkdev(clk, NULL, "e2000000.ehci");
 266         clk_register_clkdev(clk, NULL, "e2100000.ohci");
 267
 268         clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB,
 269                         USBD_CLK_ENB, 0, &_lock);
 270         clk_register_clkdev(clk, NULL, "designware_udc");
 271
 272         /* clock derived from ahb clk */
 273         clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2,
 274                         1);
 275         clk_register_clkdev(clk, "ahbmult2_clk", NULL);
 276
 277         clk = clk_register_mux(NULL, "ddr_clk", ddr_parents,
 278                         ARRAY_SIZE(ddr_parents), CLK_SET_RATE_NO_REPARENT,
 279                         PLL_CLK_CFG, MCTR_CLK_SHIFT, MCTR_CLK_MASK, 0, &_lock);
 280         clk_register_clkdev(clk, "ddr_clk", NULL);
 281
 282         clk = clk_register_divider(NULL, "apb_clk", "ahb_clk",
 283                         CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT,
 284                         PCLK_RATIO_MASK, 0, &_lock);
 285         clk_register_clkdev(clk, "apb_clk", NULL);
 286
 287         clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 288                         DMA_CLK_ENB, 0, &_lock);
 289         clk_register_clkdev(clk, NULL, "fc400000.dma");
 290
 291         clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 292                         FSMC_CLK_ENB, 0, &_lock);
 293         clk_register_clkdev(clk, NULL, "d1800000.flash");
 294
 295         clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 296                         GMAC_CLK_ENB, 0, &_lock);
 297         clk_register_clkdev(clk, NULL, "e0800000.ethernet");
 298
 299         clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 300                         I2C_CLK_ENB, 0, &_lock);
 301         clk_register_clkdev(clk, NULL, "d0200000.i2c");
 302
 303         clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 304                         JPEG_CLK_ENB, 0, &_lock);
 305         clk_register_clkdev(clk, NULL, "jpeg");
 306
 307         clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB,
 308                         SMI_CLK_ENB, 0, &_lock);
 309         clk_register_clkdev(clk, NULL, "fc000000.flash");
 310
 311         /* clock derived from apb clk */
 312         clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 313                         ADC_CLK_ENB, 0, &_lock);
 314         clk_register_clkdev(clk, NULL, "d820b000.adc");
 315
 316         clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1);
 317         clk_register_clkdev(clk, NULL, "f0100000.gpio");
 318
 319         clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 320                         GPIO1_CLK_ENB, 0, &_lock);
 321         clk_register_clkdev(clk, NULL, "fc980000.gpio");
 322
 323         clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 324                         GPIO2_CLK_ENB, 0, &_lock);
 325         clk_register_clkdev(clk, NULL, "d8100000.gpio");
 326
 327         clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 328                         SSP0_CLK_ENB, 0, &_lock);
 329         clk_register_clkdev(clk, NULL, "d0100000.spi");
 330
 331         clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 332                         SSP1_CLK_ENB, 0, &_lock);
 333         clk_register_clkdev(clk, NULL, "d0180000.spi");
 334
 335         clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB,
 336                         SSP2_CLK_ENB, 0, &_lock);
 337         clk_register_clkdev(clk, NULL, "d8180000.spi");
 338 }