1 /* 2 * SPEAr6xx machines clock framework source file 3 * 4 * Copyright (C) 2012 ST Microelectronics 5 * Viresh Kumar <viresh.linux@gmail.com> 6 * 7 * This file is licensed under the terms of the GNU General Public 8 * License version 2. This program is licensed "as is" without any 9 * warranty of any kind, whether express or implied. 10 */ 11 12 #include <linux/clk.h> 13 #include <linux/clkdev.h> 14 #include <linux/io.h> 15 #include <linux/spinlock_types.h> 16 #include <mach/misc_regs.h> 17 #include "clk.h" 18 19 static DEFINE_SPINLOCK(_lock); 20 21 #define PLL1_CTR (MISC_BASE + 0x008) 22 #define PLL1_FRQ (MISC_BASE + 0x00C) 23 #define PLL2_CTR (MISC_BASE + 0x014) 24 #define PLL2_FRQ (MISC_BASE + 0x018) 25 #define PLL_CLK_CFG (MISC_BASE + 0x020) 26 /* PLL_CLK_CFG register masks */ 27 #define MCTR_CLK_SHIFT 28 28 #define MCTR_CLK_MASK 3 29 30 #define CORE_CLK_CFG (MISC_BASE + 0x024) 31 /* CORE CLK CFG register masks */ 32 #define HCLK_RATIO_SHIFT 10 33 #define HCLK_RATIO_MASK 2 34 #define PCLK_RATIO_SHIFT 8 35 #define PCLK_RATIO_MASK 2 36 37 #define PERIP_CLK_CFG (MISC_BASE + 0x028) 38 /* PERIP_CLK_CFG register masks */ 39 #define CLCD_CLK_SHIFT 2 40 #define CLCD_CLK_MASK 2 41 #define UART_CLK_SHIFT 4 42 #define UART_CLK_MASK 1 43 #define FIRDA_CLK_SHIFT 5 44 #define FIRDA_CLK_MASK 2 45 #define GPT0_CLK_SHIFT 8 46 #define GPT1_CLK_SHIFT 10 47 #define GPT2_CLK_SHIFT 11 48 #define GPT3_CLK_SHIFT 12 49 #define GPT_CLK_MASK 1 50 51 #define PERIP1_CLK_ENB (MISC_BASE + 0x02C) 52 /* PERIP1_CLK_ENB register masks */ 53 #define UART0_CLK_ENB 3 54 #define UART1_CLK_ENB 4 55 #define SSP0_CLK_ENB 5 56 #define SSP1_CLK_ENB 6 57 #define I2C_CLK_ENB 7 58 #define JPEG_CLK_ENB 8 59 #define FSMC_CLK_ENB 9 60 #define FIRDA_CLK_ENB 10 61 #define GPT2_CLK_ENB 11 62 #define GPT3_CLK_ENB 12 63 #define GPIO2_CLK_ENB 13 64 #define SSP2_CLK_ENB 14 65 #define ADC_CLK_ENB 15 66 #define GPT1_CLK_ENB 11 67 #define RTC_CLK_ENB 17 68 #define GPIO1_CLK_ENB 18 69 #define DMA_CLK_ENB 19 70 #define SMI_CLK_ENB 21 71 #define CLCD_CLK_ENB 22 72 #define GMAC_CLK_ENB 23 73 #define USBD_CLK_ENB 24 74 #define USBH0_CLK_ENB 25 75 #define USBH1_CLK_ENB 26 76 77 #define PRSC0_CLK_CFG (MISC_BASE + 0x044) 78 #define PRSC1_CLK_CFG (MISC_BASE + 0x048) 79 #define PRSC2_CLK_CFG (MISC_BASE + 0x04C) 80 81 #define CLCD_CLK_SYNT (MISC_BASE + 0x05C) 82 #define FIRDA_CLK_SYNT (MISC_BASE + 0x060) 83 #define UART_CLK_SYNT (MISC_BASE + 0x064) 84 85 /* vco rate configuration table, in ascending order of rates */ 86 static struct pll_rate_tbl pll_rtbl[] = { 87 {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */ 88 {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */ 89 {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */ 90 }; 91 92 /* aux rate configuration table, in ascending order of rates */ 93 static struct aux_rate_tbl aux_rtbl[] = { 94 /* For PLL1 = 332 MHz */ 95 {.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */ 96 {.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */ 97 {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */ 98 }; 99 100 static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", }; 101 static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", }; 102 static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", }; 103 static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", }; 104 static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", }; 105 static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", }; 106 static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none", 107 "pll2_clk", }; 108 109 /* gpt rate configuration table, in ascending order of rates */ 110 static struct gpt_rate_tbl gpt_rtbl[] = { 111 /* For pll1 = 332 MHz */ 112 {.mscale = 4, .nscale = 0}, /* 41.5 MHz */ 113 {.mscale = 2, .nscale = 0}, /* 55.3 MHz */ 114 {.mscale = 1, .nscale = 0}, /* 83 MHz */ 115 }; 116 117 void __init spear6xx_clk_init(void) 118 { 119 struct clk *clk, *clk1; 120 121 clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0); 122 clk_register_clkdev(clk, "apb_pclk", NULL); 123 124 clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT, 125 32000); 126 clk_register_clkdev(clk, "osc_32k_clk", NULL); 127 128 clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, CLK_IS_ROOT, 129 30000000); 130 clk_register_clkdev(clk, "osc_30m_clk", NULL); 131 132 /* clock derived from 32 KHz osc clk */ 133 clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0, 134 PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock); 135 clk_register_clkdev(clk, NULL, "rtc-spear"); 136 137 /* clock derived from 30 MHz osc clk */ 138 clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0, 139 48000000); 140 clk_register_clkdev(clk, "pll3_clk", NULL); 141 142 clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk", 143 0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 144 &_lock, &clk1, NULL); 145 clk_register_clkdev(clk, "vco1_clk", NULL); 146 clk_register_clkdev(clk1, "pll1_clk", NULL); 147 148 clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk", 149 0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 150 &_lock, &clk1, NULL); 151 clk_register_clkdev(clk, "vco2_clk", NULL); 152 clk_register_clkdev(clk1, "pll2_clk", NULL); 153 154 clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1, 155 1); 156 clk_register_clkdev(clk, NULL, "wdt"); 157 158 /* clock derived from pll1 clk */ 159 clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk", 0, 1, 1); 160 clk_register_clkdev(clk, "cpu_clk", NULL); 161 162 clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk", 163 CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT, 164 HCLK_RATIO_MASK, 0, &_lock); 165 clk_register_clkdev(clk, "ahb_clk", NULL); 166 167 clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0, 168 UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 169 &_lock, &clk1); 170 clk_register_clkdev(clk, "uart_syn_clk", NULL); 171 clk_register_clkdev(clk1, "uart_syn_gclk", NULL); 172 173 clk = clk_register_mux(NULL, "uart_mclk", uart_parents, 174 ARRAY_SIZE(uart_parents), 0, PERIP_CLK_CFG, 175 UART_CLK_SHIFT, UART_CLK_MASK, 0, &_lock); 176 clk_register_clkdev(clk, "uart_mclk", NULL); 177 178 clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB, 179 UART0_CLK_ENB, 0, &_lock); 180 clk_register_clkdev(clk, NULL, "d0000000.serial"); 181 182 clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB, 183 UART1_CLK_ENB, 0, &_lock); 184 clk_register_clkdev(clk, NULL, "d0080000.serial"); 185 186 clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk", 187 0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 188 &_lock, &clk1); 189 clk_register_clkdev(clk, "firda_syn_clk", NULL); 190 clk_register_clkdev(clk1, "firda_syn_gclk", NULL); 191 192 clk = clk_register_mux(NULL, "firda_mclk", firda_parents, 193 ARRAY_SIZE(firda_parents), 0, PERIP_CLK_CFG, 194 FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0, &_lock); 195 clk_register_clkdev(clk, "firda_mclk", NULL); 196 197 clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0, 198 PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock); 199 clk_register_clkdev(clk, NULL, "firda"); 200 201 clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk", 202 0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 203 &_lock, &clk1); 204 clk_register_clkdev(clk, "clcd_syn_clk", NULL); 205 clk_register_clkdev(clk1, "clcd_syn_gclk", NULL); 206 207 clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents, 208 ARRAY_SIZE(clcd_parents), 0, PERIP_CLK_CFG, 209 CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0, &_lock); 210 clk_register_clkdev(clk, "clcd_mclk", NULL); 211 212 clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0, 213 PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock); 214 clk_register_clkdev(clk, NULL, "clcd"); 215 216 /* gpt clocks */ 217 clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG, 218 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 219 clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL); 220 221 clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents, 222 ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG, 223 GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 224 clk_register_clkdev(clk, NULL, "gpt0"); 225 226 clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents, 227 ARRAY_SIZE(gpt0_1_parents), 0, PERIP_CLK_CFG, 228 GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 229 clk_register_clkdev(clk, "gpt1_mclk", NULL); 230 231 clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0, 232 PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock); 233 clk_register_clkdev(clk, NULL, "gpt1"); 234 235 clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG, 236 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 237 clk_register_clkdev(clk, "gpt2_syn_clk", NULL); 238 239 clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents, 240 ARRAY_SIZE(gpt2_parents), 0, PERIP_CLK_CFG, 241 GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 242 clk_register_clkdev(clk, "gpt2_mclk", NULL); 243 244 clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0, 245 PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock); 246 clk_register_clkdev(clk, NULL, "gpt2"); 247 248 clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG, 249 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 250 clk_register_clkdev(clk, "gpt3_syn_clk", NULL); 251 252 clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents, 253 ARRAY_SIZE(gpt3_parents), 0, PERIP_CLK_CFG, 254 GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 255 clk_register_clkdev(clk, "gpt3_mclk", NULL); 256 257 clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0, 258 PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock); 259 clk_register_clkdev(clk, NULL, "gpt3"); 260 261 /* clock derived from pll3 clk */ 262 clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0, 263 PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock); 264 clk_register_clkdev(clk, NULL, "e1800000.ehci"); 265 clk_register_clkdev(clk, NULL, "e1900000.ohci"); 266 267 clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0, 268 PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock); 269 clk_register_clkdev(clk, NULL, "e2000000.ehci"); 270 clk_register_clkdev(clk, NULL, "e2100000.ohci"); 271 272 clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB, 273 USBD_CLK_ENB, 0, &_lock); 274 clk_register_clkdev(clk, NULL, "designware_udc"); 275 276 /* clock derived from ahb clk */ 277 clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2, 278 1); 279 clk_register_clkdev(clk, "ahbmult2_clk", NULL); 280 281 clk = clk_register_mux(NULL, "ddr_clk", ddr_parents, 282 ARRAY_SIZE(ddr_parents), 0, PLL_CLK_CFG, MCTR_CLK_SHIFT, 283 MCTR_CLK_MASK, 0, &_lock); 284 clk_register_clkdev(clk, "ddr_clk", NULL); 285 286 clk = clk_register_divider(NULL, "apb_clk", "ahb_clk", 287 CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT, 288 PCLK_RATIO_MASK, 0, &_lock); 289 clk_register_clkdev(clk, "apb_clk", NULL); 290 291 clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 292 DMA_CLK_ENB, 0, &_lock); 293 clk_register_clkdev(clk, NULL, "fc400000.dma"); 294 295 clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 296 FSMC_CLK_ENB, 0, &_lock); 297 clk_register_clkdev(clk, NULL, "d1800000.flash"); 298 299 clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 300 GMAC_CLK_ENB, 0, &_lock); 301 clk_register_clkdev(clk, NULL, "e0800000.ethernet"); 302 303 clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 304 I2C_CLK_ENB, 0, &_lock); 305 clk_register_clkdev(clk, NULL, "d0200000.i2c"); 306 307 clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 308 JPEG_CLK_ENB, 0, &_lock); 309 clk_register_clkdev(clk, NULL, "jpeg"); 310 311 clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 312 SMI_CLK_ENB, 0, &_lock); 313 clk_register_clkdev(clk, NULL, "fc000000.flash"); 314 315 /* clock derived from apb clk */ 316 clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB, 317 ADC_CLK_ENB, 0, &_lock); 318 clk_register_clkdev(clk, NULL, "adc"); 319 320 clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1); 321 clk_register_clkdev(clk, NULL, "f0100000.gpio"); 322 323 clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 324 GPIO1_CLK_ENB, 0, &_lock); 325 clk_register_clkdev(clk, NULL, "fc980000.gpio"); 326 327 clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 328 GPIO2_CLK_ENB, 0, &_lock); 329 clk_register_clkdev(clk, NULL, "d8100000.gpio"); 330 331 clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB, 332 SSP0_CLK_ENB, 0, &_lock); 333 clk_register_clkdev(clk, NULL, "ssp-pl022.0"); 334 335 clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 336 SSP1_CLK_ENB, 0, &_lock); 337 clk_register_clkdev(clk, NULL, "ssp-pl022.1"); 338 339 clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 340 SSP2_CLK_ENB, 0, &_lock); 341 clk_register_clkdev(clk, NULL, "ssp-pl022.2"); 342 } 343