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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 | /* * SPEAr6xx machines clock framework source file * * Copyright (C) 2012 ST Microelectronics * Viresh Kumar <viresh.linux@gmail.com> * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include <linux/clk.h> #include <linux/clkdev.h> #include <linux/io.h> #include <linux/spinlock_types.h> #include <mach/misc_regs.h> #include "clk.h" static DEFINE_SPINLOCK(_lock); #define PLL1_CTR (MISC_BASE + 0x008) #define PLL1_FRQ (MISC_BASE + 0x00C) #define PLL2_CTR (MISC_BASE + 0x014) #define PLL2_FRQ (MISC_BASE + 0x018) #define PLL_CLK_CFG (MISC_BASE + 0x020) /* PLL_CLK_CFG register masks */ #define MCTR_CLK_SHIFT 28 #define MCTR_CLK_MASK 3 #define CORE_CLK_CFG (MISC_BASE + 0x024) /* CORE CLK CFG register masks */ #define HCLK_RATIO_SHIFT 10 #define HCLK_RATIO_MASK 2 #define PCLK_RATIO_SHIFT 8 #define PCLK_RATIO_MASK 2 #define PERIP_CLK_CFG (MISC_BASE + 0x028) /* PERIP_CLK_CFG register masks */ #define CLCD_CLK_SHIFT 2 #define CLCD_CLK_MASK 2 #define UART_CLK_SHIFT 4 #define UART_CLK_MASK 1 #define FIRDA_CLK_SHIFT 5 #define FIRDA_CLK_MASK 2 #define GPT0_CLK_SHIFT 8 #define GPT1_CLK_SHIFT 10 #define GPT2_CLK_SHIFT 11 #define GPT3_CLK_SHIFT 12 #define GPT_CLK_MASK 1 #define PERIP1_CLK_ENB (MISC_BASE + 0x02C) /* PERIP1_CLK_ENB register masks */ #define UART0_CLK_ENB 3 #define UART1_CLK_ENB 4 #define SSP0_CLK_ENB 5 #define SSP1_CLK_ENB 6 #define I2C_CLK_ENB 7 #define JPEG_CLK_ENB 8 #define FSMC_CLK_ENB 9 #define FIRDA_CLK_ENB 10 #define GPT2_CLK_ENB 11 #define GPT3_CLK_ENB 12 #define GPIO2_CLK_ENB 13 #define SSP2_CLK_ENB 14 #define ADC_CLK_ENB 15 #define GPT1_CLK_ENB 11 #define RTC_CLK_ENB 17 #define GPIO1_CLK_ENB 18 #define DMA_CLK_ENB 19 #define SMI_CLK_ENB 21 #define CLCD_CLK_ENB 22 #define GMAC_CLK_ENB 23 #define USBD_CLK_ENB 24 #define USBH0_CLK_ENB 25 #define USBH1_CLK_ENB 26 #define PRSC0_CLK_CFG (MISC_BASE + 0x044) #define PRSC1_CLK_CFG (MISC_BASE + 0x048) #define PRSC2_CLK_CFG (MISC_BASE + 0x04C) #define CLCD_CLK_SYNT (MISC_BASE + 0x05C) #define FIRDA_CLK_SYNT (MISC_BASE + 0x060) #define UART_CLK_SYNT (MISC_BASE + 0x064) /* vco rate configuration table, in ascending order of rates */ static struct pll_rate_tbl pll_rtbl[] = { {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */ {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */ {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */ }; /* aux rate configuration table, in ascending order of rates */ static struct aux_rate_tbl aux_rtbl[] = { /* For PLL1 = 332 MHz */ {.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 MHz */ {.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */ {.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */ {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */ }; static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", }; static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", }; static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", }; static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", }; static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", }; static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", }; static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none", "pll2_clk", }; /* gpt rate configuration table, in ascending order of rates */ static struct gpt_rate_tbl gpt_rtbl[] = { /* For pll1 = 332 MHz */ {.mscale = 4, .nscale = 0}, /* 41.5 MHz */ {.mscale = 2, .nscale = 0}, /* 55.3 MHz */ {.mscale = 1, .nscale = 0}, /* 83 MHz */ }; void __init spear6xx_clk_init(void) { struct clk *clk, *clk1; clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT, 32000); clk_register_clkdev(clk, "osc_32k_clk", NULL); clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, CLK_IS_ROOT, 30000000); clk_register_clkdev(clk, "osc_30m_clk", NULL); /* clock derived from 32 KHz osc clk */ clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0, PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "rtc-spear"); /* clock derived from 30 MHz osc clk */ clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0, 48000000); clk_register_clkdev(clk, "pll3_clk", NULL); clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk", 0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), &_lock, &clk1, NULL); clk_register_clkdev(clk, "vco1_clk", NULL); clk_register_clkdev(clk1, "pll1_clk", NULL); clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk", 0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), &_lock, &clk1, NULL); clk_register_clkdev(clk, "vco2_clk", NULL); clk_register_clkdev(clk1, "pll2_clk", NULL); clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1, 1); clk_register_clkdev(clk, NULL, "wdt"); /* clock derived from pll1 clk */ clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk", CLK_SET_RATE_PARENT, 1, 1); clk_register_clkdev(clk, "cpu_clk", NULL); clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk", CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT, HCLK_RATIO_MASK, 0, &_lock); clk_register_clkdev(clk, "ahb_clk", NULL); clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0, UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), &_lock, &clk1); clk_register_clkdev(clk, "uart_syn_clk", NULL); clk_register_clkdev(clk1, "uart_syn_gclk", NULL); clk = clk_register_mux(NULL, "uart_mclk", uart_parents, ARRAY_SIZE(uart_parents), 0, PERIP_CLK_CFG, UART_CLK_SHIFT, UART_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "uart_mclk", NULL); clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB, UART0_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0000000.serial"); clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB, UART1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0080000.serial"); clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk", 0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), &_lock, &clk1); clk_register_clkdev(clk, "firda_syn_clk", NULL); clk_register_clkdev(clk1, "firda_syn_gclk", NULL); clk = clk_register_mux(NULL, "firda_mclk", firda_parents, ARRAY_SIZE(firda_parents), 0, PERIP_CLK_CFG, FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "firda_mclk", NULL); clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0, PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "firda"); clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk", 0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), &_lock, &clk1); clk_register_clkdev(clk, "clcd_syn_clk", NULL); clk_register_clkdev(clk1, "clcd_syn_gclk", NULL); clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents, ARRAY_SIZE(clcd_parents), 0, PERIP_CLK_CFG, CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "clcd_mclk", NULL); clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0, PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "clcd"); /* gpt clocks */ clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG, gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL); clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents, ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG, GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, NULL, "gpt0"); clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents, ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG, GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "gpt1_mclk", NULL); clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0, PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "gpt1"); clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG, gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); clk_register_clkdev(clk, "gpt2_syn_clk", NULL); clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents, ARRAY_SIZE(gpt2_parents), 0, PERIP_CLK_CFG, GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "gpt2_mclk", NULL); clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0, PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "gpt2"); clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG, gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); clk_register_clkdev(clk, "gpt3_syn_clk", NULL); clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents, ARRAY_SIZE(gpt3_parents), 0, PERIP_CLK_CFG, GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "gpt3_mclk", NULL); clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0, PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "gpt3"); /* clock derived from pll3 clk */ clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0, PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "e1800000.ehci"); clk_register_clkdev(clk, NULL, "e1900000.ohci"); clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0, PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "e2000000.ehci"); clk_register_clkdev(clk, NULL, "e2100000.ohci"); clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB, USBD_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "designware_udc"); /* clock derived from ahb clk */ clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2, 1); clk_register_clkdev(clk, "ahbmult2_clk", NULL); clk = clk_register_mux(NULL, "ddr_clk", ddr_parents, ARRAY_SIZE(ddr_parents), 0, PLL_CLK_CFG, MCTR_CLK_SHIFT, MCTR_CLK_MASK, 0, &_lock); clk_register_clkdev(clk, "ddr_clk", NULL); clk = clk_register_divider(NULL, "apb_clk", "ahb_clk", CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT, PCLK_RATIO_MASK, 0, &_lock); clk_register_clkdev(clk, "apb_clk", NULL); clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB, DMA_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "fc400000.dma"); clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB, FSMC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d1800000.flash"); clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB, GMAC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "e0800000.ethernet"); clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB, I2C_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d0200000.i2c"); clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB, JPEG_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "jpeg"); clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB, SMI_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "fc000000.flash"); /* clock derived from apb clk */ clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB, ADC_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "adc"); clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1); clk_register_clkdev(clk, NULL, "f0100000.gpio"); clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB, GPIO1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "fc980000.gpio"); clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB, GPIO2_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "d8100000.gpio"); clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB, SSP0_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "ssp-pl022.0"); clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB, SSP1_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "ssp-pl022.1"); clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB, SSP2_CLK_ENB, 0, &_lock); clk_register_clkdev(clk, NULL, "ssp-pl022.2"); } |