1 /* 2 * SPEAr6xx machines clock framework source file 3 * 4 * Copyright (C) 2012 ST Microelectronics 5 * Viresh Kumar <vireshk@kernel.org> 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 "clk.h" 17 18 static DEFINE_SPINLOCK(_lock); 19 20 #define PLL1_CTR (misc_base + 0x008) 21 #define PLL1_FRQ (misc_base + 0x00C) 22 #define PLL2_CTR (misc_base + 0x014) 23 #define PLL2_FRQ (misc_base + 0x018) 24 #define PLL_CLK_CFG (misc_base + 0x020) 25 /* PLL_CLK_CFG register masks */ 26 #define MCTR_CLK_SHIFT 28 27 #define MCTR_CLK_MASK 3 28 29 #define CORE_CLK_CFG (misc_base + 0x024) 30 /* CORE CLK CFG register masks */ 31 #define HCLK_RATIO_SHIFT 10 32 #define HCLK_RATIO_MASK 2 33 #define PCLK_RATIO_SHIFT 8 34 #define PCLK_RATIO_MASK 2 35 36 #define PERIP_CLK_CFG (misc_base + 0x028) 37 /* PERIP_CLK_CFG register masks */ 38 #define CLCD_CLK_SHIFT 2 39 #define CLCD_CLK_MASK 2 40 #define UART_CLK_SHIFT 4 41 #define UART_CLK_MASK 1 42 #define FIRDA_CLK_SHIFT 5 43 #define FIRDA_CLK_MASK 2 44 #define GPT0_CLK_SHIFT 8 45 #define GPT1_CLK_SHIFT 10 46 #define GPT2_CLK_SHIFT 11 47 #define GPT3_CLK_SHIFT 12 48 #define GPT_CLK_MASK 1 49 50 #define PERIP1_CLK_ENB (misc_base + 0x02C) 51 /* PERIP1_CLK_ENB register masks */ 52 #define UART0_CLK_ENB 3 53 #define UART1_CLK_ENB 4 54 #define SSP0_CLK_ENB 5 55 #define SSP1_CLK_ENB 6 56 #define I2C_CLK_ENB 7 57 #define JPEG_CLK_ENB 8 58 #define FSMC_CLK_ENB 9 59 #define FIRDA_CLK_ENB 10 60 #define GPT2_CLK_ENB 11 61 #define GPT3_CLK_ENB 12 62 #define GPIO2_CLK_ENB 13 63 #define SSP2_CLK_ENB 14 64 #define ADC_CLK_ENB 15 65 #define GPT1_CLK_ENB 11 66 #define RTC_CLK_ENB 17 67 #define GPIO1_CLK_ENB 18 68 #define DMA_CLK_ENB 19 69 #define SMI_CLK_ENB 21 70 #define CLCD_CLK_ENB 22 71 #define GMAC_CLK_ENB 23 72 #define USBD_CLK_ENB 24 73 #define USBH0_CLK_ENB 25 74 #define USBH1_CLK_ENB 26 75 76 #define PRSC0_CLK_CFG (misc_base + 0x044) 77 #define PRSC1_CLK_CFG (misc_base + 0x048) 78 #define PRSC2_CLK_CFG (misc_base + 0x04C) 79 80 #define CLCD_CLK_SYNT (misc_base + 0x05C) 81 #define FIRDA_CLK_SYNT (misc_base + 0x060) 82 #define UART_CLK_SYNT (misc_base + 0x064) 83 84 /* vco rate configuration table, in ascending order of rates */ 85 static struct pll_rate_tbl pll_rtbl[] = { 86 {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */ 87 {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */ 88 {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */ 89 }; 90 91 /* aux rate configuration table, in ascending order of rates */ 92 static struct aux_rate_tbl aux_rtbl[] = { 93 /* For PLL1 = 332 MHz */ 94 {.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 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 __iomem *misc_base) 118 { 119 struct clk *clk, *clk1; 120 121 clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT, 122 32000); 123 clk_register_clkdev(clk, "osc_32k_clk", NULL); 124 125 clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, CLK_IS_ROOT, 126 30000000); 127 clk_register_clkdev(clk, "osc_30m_clk", NULL); 128 129 /* clock derived from 32 KHz osc clk */ 130 clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0, 131 PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock); 132 clk_register_clkdev(clk, NULL, "rtc-spear"); 133 134 /* clock derived from 30 MHz osc clk */ 135 clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0, 136 48000000); 137 clk_register_clkdev(clk, "pll3_clk", NULL); 138 139 clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk", 140 0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 141 &_lock, &clk1, NULL); 142 clk_register_clkdev(clk, "vco1_clk", NULL); 143 clk_register_clkdev(clk1, "pll1_clk", NULL); 144 145 clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk", 146 0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 147 &_lock, &clk1, NULL); 148 clk_register_clkdev(clk, "vco2_clk", NULL); 149 clk_register_clkdev(clk1, "pll2_clk", NULL); 150 151 clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1, 152 1); 153 clk_register_clkdev(clk, NULL, "wdt"); 154 155 /* clock derived from pll1 clk */ 156 clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk", 157 CLK_SET_RATE_PARENT, 1, 1); 158 clk_register_clkdev(clk, "cpu_clk", NULL); 159 160 clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk", 161 CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT, 162 HCLK_RATIO_MASK, 0, &_lock); 163 clk_register_clkdev(clk, "ahb_clk", NULL); 164 165 clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0, 166 UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 167 &_lock, &clk1); 168 clk_register_clkdev(clk, "uart_syn_clk", NULL); 169 clk_register_clkdev(clk1, "uart_syn_gclk", NULL); 170 171 clk = clk_register_mux(NULL, "uart_mclk", uart_parents, 172 ARRAY_SIZE(uart_parents), CLK_SET_RATE_NO_REPARENT, 173 PERIP_CLK_CFG, UART_CLK_SHIFT, UART_CLK_MASK, 0, 174 &_lock); 175 clk_register_clkdev(clk, "uart_mclk", NULL); 176 177 clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB, 178 UART0_CLK_ENB, 0, &_lock); 179 clk_register_clkdev(clk, NULL, "d0000000.serial"); 180 181 clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB, 182 UART1_CLK_ENB, 0, &_lock); 183 clk_register_clkdev(clk, NULL, "d0080000.serial"); 184 185 clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk", 186 0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 187 &_lock, &clk1); 188 clk_register_clkdev(clk, "firda_syn_clk", NULL); 189 clk_register_clkdev(clk1, "firda_syn_gclk", NULL); 190 191 clk = clk_register_mux(NULL, "firda_mclk", firda_parents, 192 ARRAY_SIZE(firda_parents), CLK_SET_RATE_NO_REPARENT, 193 PERIP_CLK_CFG, FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0, 194 &_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), CLK_SET_RATE_NO_REPARENT, 209 PERIP_CLK_CFG, CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0, 210 &_lock); 211 clk_register_clkdev(clk, "clcd_mclk", NULL); 212 213 clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0, 214 PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock); 215 clk_register_clkdev(clk, NULL, "clcd"); 216 217 /* gpt clocks */ 218 clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG, 219 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 220 clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL); 221 222 clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents, 223 ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT, 224 PERIP_CLK_CFG, GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 225 clk_register_clkdev(clk, NULL, "gpt0"); 226 227 clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents, 228 ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT, 229 PERIP_CLK_CFG, GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 230 clk_register_clkdev(clk, "gpt1_mclk", NULL); 231 232 clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0, 233 PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock); 234 clk_register_clkdev(clk, NULL, "gpt1"); 235 236 clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG, 237 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 238 clk_register_clkdev(clk, "gpt2_syn_clk", NULL); 239 240 clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents, 241 ARRAY_SIZE(gpt2_parents), CLK_SET_RATE_NO_REPARENT, 242 PERIP_CLK_CFG, GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 243 clk_register_clkdev(clk, "gpt2_mclk", NULL); 244 245 clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0, 246 PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock); 247 clk_register_clkdev(clk, NULL, "gpt2"); 248 249 clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG, 250 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 251 clk_register_clkdev(clk, "gpt3_syn_clk", NULL); 252 253 clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents, 254 ARRAY_SIZE(gpt3_parents), CLK_SET_RATE_NO_REPARENT, 255 PERIP_CLK_CFG, GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 256 clk_register_clkdev(clk, "gpt3_mclk", NULL); 257 258 clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0, 259 PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock); 260 clk_register_clkdev(clk, NULL, "gpt3"); 261 262 /* clock derived from pll3 clk */ 263 clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0, 264 PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock); 265 clk_register_clkdev(clk, NULL, "e1800000.ehci"); 266 clk_register_clkdev(clk, NULL, "e1900000.ohci"); 267 268 clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0, 269 PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock); 270 clk_register_clkdev(clk, NULL, "e2000000.ehci"); 271 clk_register_clkdev(clk, NULL, "e2100000.ohci"); 272 273 clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB, 274 USBD_CLK_ENB, 0, &_lock); 275 clk_register_clkdev(clk, NULL, "designware_udc"); 276 277 /* clock derived from ahb clk */ 278 clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2, 279 1); 280 clk_register_clkdev(clk, "ahbmult2_clk", NULL); 281 282 clk = clk_register_mux(NULL, "ddr_clk", ddr_parents, 283 ARRAY_SIZE(ddr_parents), CLK_SET_RATE_NO_REPARENT, 284 PLL_CLK_CFG, MCTR_CLK_SHIFT, MCTR_CLK_MASK, 0, &_lock); 285 clk_register_clkdev(clk, "ddr_clk", NULL); 286 287 clk = clk_register_divider(NULL, "apb_clk", "ahb_clk", 288 CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT, 289 PCLK_RATIO_MASK, 0, &_lock); 290 clk_register_clkdev(clk, "apb_clk", NULL); 291 292 clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 293 DMA_CLK_ENB, 0, &_lock); 294 clk_register_clkdev(clk, NULL, "fc400000.dma"); 295 296 clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 297 FSMC_CLK_ENB, 0, &_lock); 298 clk_register_clkdev(clk, NULL, "d1800000.flash"); 299 300 clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 301 GMAC_CLK_ENB, 0, &_lock); 302 clk_register_clkdev(clk, NULL, "e0800000.ethernet"); 303 304 clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 305 I2C_CLK_ENB, 0, &_lock); 306 clk_register_clkdev(clk, NULL, "d0200000.i2c"); 307 308 clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 309 JPEG_CLK_ENB, 0, &_lock); 310 clk_register_clkdev(clk, NULL, "jpeg"); 311 312 clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 313 SMI_CLK_ENB, 0, &_lock); 314 clk_register_clkdev(clk, NULL, "fc000000.flash"); 315 316 /* clock derived from apb clk */ 317 clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB, 318 ADC_CLK_ENB, 0, &_lock); 319 clk_register_clkdev(clk, NULL, "adc"); 320 321 clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1); 322 clk_register_clkdev(clk, NULL, "f0100000.gpio"); 323 324 clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 325 GPIO1_CLK_ENB, 0, &_lock); 326 clk_register_clkdev(clk, NULL, "fc980000.gpio"); 327 328 clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 329 GPIO2_CLK_ENB, 0, &_lock); 330 clk_register_clkdev(clk, NULL, "d8100000.gpio"); 331 332 clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB, 333 SSP0_CLK_ENB, 0, &_lock); 334 clk_register_clkdev(clk, NULL, "ssp-pl022.0"); 335 336 clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 337 SSP1_CLK_ENB, 0, &_lock); 338 clk_register_clkdev(clk, NULL, "ssp-pl022.1"); 339 340 clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 341 SSP2_CLK_ENB, 0, &_lock); 342 clk_register_clkdev(clk, NULL, "ssp-pl022.2"); 343 } 344