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/clkdev.h> 13 #include <linux/io.h> 14 #include <linux/spinlock_types.h> 15 #include "clk.h" 16 17 static DEFINE_SPINLOCK(_lock); 18 19 #define PLL1_CTR (misc_base + 0x008) 20 #define PLL1_FRQ (misc_base + 0x00C) 21 #define PLL2_CTR (misc_base + 0x014) 22 #define PLL2_FRQ (misc_base + 0x018) 23 #define PLL_CLK_CFG (misc_base + 0x020) 24 /* PLL_CLK_CFG register masks */ 25 #define MCTR_CLK_SHIFT 28 26 #define MCTR_CLK_MASK 3 27 28 #define CORE_CLK_CFG (misc_base + 0x024) 29 /* CORE CLK CFG register masks */ 30 #define HCLK_RATIO_SHIFT 10 31 #define HCLK_RATIO_MASK 2 32 #define PCLK_RATIO_SHIFT 8 33 #define PCLK_RATIO_MASK 2 34 35 #define PERIP_CLK_CFG (misc_base + 0x028) 36 /* PERIP_CLK_CFG register masks */ 37 #define CLCD_CLK_SHIFT 2 38 #define CLCD_CLK_MASK 2 39 #define UART_CLK_SHIFT 4 40 #define UART_CLK_MASK 1 41 #define FIRDA_CLK_SHIFT 5 42 #define FIRDA_CLK_MASK 2 43 #define GPT0_CLK_SHIFT 8 44 #define GPT1_CLK_SHIFT 10 45 #define GPT2_CLK_SHIFT 11 46 #define GPT3_CLK_SHIFT 12 47 #define GPT_CLK_MASK 1 48 49 #define PERIP1_CLK_ENB (misc_base + 0x02C) 50 /* PERIP1_CLK_ENB register masks */ 51 #define UART0_CLK_ENB 3 52 #define UART1_CLK_ENB 4 53 #define SSP0_CLK_ENB 5 54 #define SSP1_CLK_ENB 6 55 #define I2C_CLK_ENB 7 56 #define JPEG_CLK_ENB 8 57 #define FSMC_CLK_ENB 9 58 #define FIRDA_CLK_ENB 10 59 #define GPT2_CLK_ENB 11 60 #define GPT3_CLK_ENB 12 61 #define GPIO2_CLK_ENB 13 62 #define SSP2_CLK_ENB 14 63 #define ADC_CLK_ENB 15 64 #define GPT1_CLK_ENB 11 65 #define RTC_CLK_ENB 17 66 #define GPIO1_CLK_ENB 18 67 #define DMA_CLK_ENB 19 68 #define SMI_CLK_ENB 21 69 #define CLCD_CLK_ENB 22 70 #define GMAC_CLK_ENB 23 71 #define USBD_CLK_ENB 24 72 #define USBH0_CLK_ENB 25 73 #define USBH1_CLK_ENB 26 74 75 #define PRSC0_CLK_CFG (misc_base + 0x044) 76 #define PRSC1_CLK_CFG (misc_base + 0x048) 77 #define PRSC2_CLK_CFG (misc_base + 0x04C) 78 79 #define CLCD_CLK_SYNT (misc_base + 0x05C) 80 #define FIRDA_CLK_SYNT (misc_base + 0x060) 81 #define UART_CLK_SYNT (misc_base + 0x064) 82 83 /* vco rate configuration table, in ascending order of rates */ 84 static struct pll_rate_tbl pll_rtbl[] = { 85 {.mode = 0, .m = 0x53, .n = 0x0F, .p = 0x1}, /* vco 332 & pll 166 MHz */ 86 {.mode = 0, .m = 0x85, .n = 0x0F, .p = 0x1}, /* vco 532 & pll 266 MHz */ 87 {.mode = 0, .m = 0xA6, .n = 0x0F, .p = 0x1}, /* vco 664 & pll 332 MHz */ 88 }; 89 90 /* aux rate configuration table, in ascending order of rates */ 91 static struct aux_rate_tbl aux_rtbl[] = { 92 /* For PLL1 = 332 MHz */ 93 {.xscale = 2, .yscale = 27, .eq = 0}, /* 12.296 MHz */ 94 {.xscale = 2, .yscale = 8, .eq = 0}, /* 41.5 MHz */ 95 {.xscale = 2, .yscale = 4, .eq = 0}, /* 83 MHz */ 96 {.xscale = 1, .yscale = 2, .eq = 1}, /* 166 MHz */ 97 }; 98 99 static const char *clcd_parents[] = { "pll3_clk", "clcd_syn_gclk", }; 100 static const char *firda_parents[] = { "pll3_clk", "firda_syn_gclk", }; 101 static const char *uart_parents[] = { "pll3_clk", "uart_syn_gclk", }; 102 static const char *gpt0_1_parents[] = { "pll3_clk", "gpt0_1_syn_clk", }; 103 static const char *gpt2_parents[] = { "pll3_clk", "gpt2_syn_clk", }; 104 static const char *gpt3_parents[] = { "pll3_clk", "gpt3_syn_clk", }; 105 static const char *ddr_parents[] = { "ahb_clk", "ahbmult2_clk", "none", 106 "pll2_clk", }; 107 108 /* gpt rate configuration table, in ascending order of rates */ 109 static struct gpt_rate_tbl gpt_rtbl[] = { 110 /* For pll1 = 332 MHz */ 111 {.mscale = 4, .nscale = 0}, /* 41.5 MHz */ 112 {.mscale = 2, .nscale = 0}, /* 55.3 MHz */ 113 {.mscale = 1, .nscale = 0}, /* 83 MHz */ 114 }; 115 116 void __init spear6xx_clk_init(void __iomem *misc_base) 117 { 118 struct clk *clk, *clk1; 119 120 clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, 0, 32000); 121 clk_register_clkdev(clk, "osc_32k_clk", NULL); 122 123 clk = clk_register_fixed_rate(NULL, "osc_30m_clk", NULL, 0, 30000000); 124 clk_register_clkdev(clk, "osc_30m_clk", NULL); 125 126 /* clock derived from 32 KHz osc clk */ 127 clk = clk_register_gate(NULL, "rtc_spear", "osc_32k_clk", 0, 128 PERIP1_CLK_ENB, RTC_CLK_ENB, 0, &_lock); 129 clk_register_clkdev(clk, NULL, "rtc-spear"); 130 131 /* clock derived from 30 MHz osc clk */ 132 clk = clk_register_fixed_rate(NULL, "pll3_clk", "osc_24m_clk", 0, 133 48000000); 134 clk_register_clkdev(clk, "pll3_clk", NULL); 135 136 clk = clk_register_vco_pll("vco1_clk", "pll1_clk", NULL, "osc_30m_clk", 137 0, PLL1_CTR, PLL1_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 138 &_lock, &clk1, NULL); 139 clk_register_clkdev(clk, "vco1_clk", NULL); 140 clk_register_clkdev(clk1, "pll1_clk", NULL); 141 142 clk = clk_register_vco_pll("vco2_clk", "pll2_clk", NULL, "osc_30m_clk", 143 0, PLL2_CTR, PLL2_FRQ, pll_rtbl, ARRAY_SIZE(pll_rtbl), 144 &_lock, &clk1, NULL); 145 clk_register_clkdev(clk, "vco2_clk", NULL); 146 clk_register_clkdev(clk1, "pll2_clk", NULL); 147 148 clk = clk_register_fixed_factor(NULL, "wdt_clk", "osc_30m_clk", 0, 1, 149 1); 150 clk_register_clkdev(clk, NULL, "wdt"); 151 152 /* clock derived from pll1 clk */ 153 clk = clk_register_fixed_factor(NULL, "cpu_clk", "pll1_clk", 154 CLK_SET_RATE_PARENT, 1, 1); 155 clk_register_clkdev(clk, "cpu_clk", NULL); 156 157 clk = clk_register_divider(NULL, "ahb_clk", "pll1_clk", 158 CLK_SET_RATE_PARENT, CORE_CLK_CFG, HCLK_RATIO_SHIFT, 159 HCLK_RATIO_MASK, 0, &_lock); 160 clk_register_clkdev(clk, "ahb_clk", NULL); 161 162 clk = clk_register_aux("uart_syn_clk", "uart_syn_gclk", "pll1_clk", 0, 163 UART_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 164 &_lock, &clk1); 165 clk_register_clkdev(clk, "uart_syn_clk", NULL); 166 clk_register_clkdev(clk1, "uart_syn_gclk", NULL); 167 168 clk = clk_register_mux(NULL, "uart_mclk", uart_parents, 169 ARRAY_SIZE(uart_parents), CLK_SET_RATE_NO_REPARENT, 170 PERIP_CLK_CFG, UART_CLK_SHIFT, UART_CLK_MASK, 0, 171 &_lock); 172 clk_register_clkdev(clk, "uart_mclk", NULL); 173 174 clk = clk_register_gate(NULL, "uart0", "uart_mclk", 0, PERIP1_CLK_ENB, 175 UART0_CLK_ENB, 0, &_lock); 176 clk_register_clkdev(clk, NULL, "d0000000.serial"); 177 178 clk = clk_register_gate(NULL, "uart1", "uart_mclk", 0, PERIP1_CLK_ENB, 179 UART1_CLK_ENB, 0, &_lock); 180 clk_register_clkdev(clk, NULL, "d0080000.serial"); 181 182 clk = clk_register_aux("firda_syn_clk", "firda_syn_gclk", "pll1_clk", 183 0, FIRDA_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 184 &_lock, &clk1); 185 clk_register_clkdev(clk, "firda_syn_clk", NULL); 186 clk_register_clkdev(clk1, "firda_syn_gclk", NULL); 187 188 clk = clk_register_mux(NULL, "firda_mclk", firda_parents, 189 ARRAY_SIZE(firda_parents), CLK_SET_RATE_NO_REPARENT, 190 PERIP_CLK_CFG, FIRDA_CLK_SHIFT, FIRDA_CLK_MASK, 0, 191 &_lock); 192 clk_register_clkdev(clk, "firda_mclk", NULL); 193 194 clk = clk_register_gate(NULL, "firda_clk", "firda_mclk", 0, 195 PERIP1_CLK_ENB, FIRDA_CLK_ENB, 0, &_lock); 196 clk_register_clkdev(clk, NULL, "firda"); 197 198 clk = clk_register_aux("clcd_syn_clk", "clcd_syn_gclk", "pll1_clk", 199 0, CLCD_CLK_SYNT, NULL, aux_rtbl, ARRAY_SIZE(aux_rtbl), 200 &_lock, &clk1); 201 clk_register_clkdev(clk, "clcd_syn_clk", NULL); 202 clk_register_clkdev(clk1, "clcd_syn_gclk", NULL); 203 204 clk = clk_register_mux(NULL, "clcd_mclk", clcd_parents, 205 ARRAY_SIZE(clcd_parents), CLK_SET_RATE_NO_REPARENT, 206 PERIP_CLK_CFG, CLCD_CLK_SHIFT, CLCD_CLK_MASK, 0, 207 &_lock); 208 clk_register_clkdev(clk, "clcd_mclk", NULL); 209 210 clk = clk_register_gate(NULL, "clcd_clk", "clcd_mclk", 0, 211 PERIP1_CLK_ENB, CLCD_CLK_ENB, 0, &_lock); 212 clk_register_clkdev(clk, NULL, "clcd"); 213 214 /* gpt clocks */ 215 clk = clk_register_gpt("gpt0_1_syn_clk", "pll1_clk", 0, PRSC0_CLK_CFG, 216 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 217 clk_register_clkdev(clk, "gpt0_1_syn_clk", NULL); 218 219 clk = clk_register_mux(NULL, "gpt0_mclk", gpt0_1_parents, 220 ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT, 221 PERIP_CLK_CFG, GPT0_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 222 clk_register_clkdev(clk, NULL, "gpt0"); 223 224 clk = clk_register_mux(NULL, "gpt1_mclk", gpt0_1_parents, 225 ARRAY_SIZE(gpt0_1_parents), CLK_SET_RATE_NO_REPARENT, 226 PERIP_CLK_CFG, GPT1_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 227 clk_register_clkdev(clk, "gpt1_mclk", NULL); 228 229 clk = clk_register_gate(NULL, "gpt1_clk", "gpt1_mclk", 0, 230 PERIP1_CLK_ENB, GPT1_CLK_ENB, 0, &_lock); 231 clk_register_clkdev(clk, NULL, "gpt1"); 232 233 clk = clk_register_gpt("gpt2_syn_clk", "pll1_clk", 0, PRSC1_CLK_CFG, 234 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 235 clk_register_clkdev(clk, "gpt2_syn_clk", NULL); 236 237 clk = clk_register_mux(NULL, "gpt2_mclk", gpt2_parents, 238 ARRAY_SIZE(gpt2_parents), CLK_SET_RATE_NO_REPARENT, 239 PERIP_CLK_CFG, GPT2_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 240 clk_register_clkdev(clk, "gpt2_mclk", NULL); 241 242 clk = clk_register_gate(NULL, "gpt2_clk", "gpt2_mclk", 0, 243 PERIP1_CLK_ENB, GPT2_CLK_ENB, 0, &_lock); 244 clk_register_clkdev(clk, NULL, "gpt2"); 245 246 clk = clk_register_gpt("gpt3_syn_clk", "pll1_clk", 0, PRSC2_CLK_CFG, 247 gpt_rtbl, ARRAY_SIZE(gpt_rtbl), &_lock); 248 clk_register_clkdev(clk, "gpt3_syn_clk", NULL); 249 250 clk = clk_register_mux(NULL, "gpt3_mclk", gpt3_parents, 251 ARRAY_SIZE(gpt3_parents), CLK_SET_RATE_NO_REPARENT, 252 PERIP_CLK_CFG, GPT3_CLK_SHIFT, GPT_CLK_MASK, 0, &_lock); 253 clk_register_clkdev(clk, "gpt3_mclk", NULL); 254 255 clk = clk_register_gate(NULL, "gpt3_clk", "gpt3_mclk", 0, 256 PERIP1_CLK_ENB, GPT3_CLK_ENB, 0, &_lock); 257 clk_register_clkdev(clk, NULL, "gpt3"); 258 259 /* clock derived from pll3 clk */ 260 clk = clk_register_gate(NULL, "usbh0_clk", "pll3_clk", 0, 261 PERIP1_CLK_ENB, USBH0_CLK_ENB, 0, &_lock); 262 clk_register_clkdev(clk, NULL, "e1800000.ehci"); 263 clk_register_clkdev(clk, NULL, "e1900000.ohci"); 264 265 clk = clk_register_gate(NULL, "usbh1_clk", "pll3_clk", 0, 266 PERIP1_CLK_ENB, USBH1_CLK_ENB, 0, &_lock); 267 clk_register_clkdev(clk, NULL, "e2000000.ehci"); 268 clk_register_clkdev(clk, NULL, "e2100000.ohci"); 269 270 clk = clk_register_gate(NULL, "usbd_clk", "pll3_clk", 0, PERIP1_CLK_ENB, 271 USBD_CLK_ENB, 0, &_lock); 272 clk_register_clkdev(clk, NULL, "designware_udc"); 273 274 /* clock derived from ahb clk */ 275 clk = clk_register_fixed_factor(NULL, "ahbmult2_clk", "ahb_clk", 0, 2, 276 1); 277 clk_register_clkdev(clk, "ahbmult2_clk", NULL); 278 279 clk = clk_register_mux(NULL, "ddr_clk", ddr_parents, 280 ARRAY_SIZE(ddr_parents), CLK_SET_RATE_NO_REPARENT, 281 PLL_CLK_CFG, MCTR_CLK_SHIFT, MCTR_CLK_MASK, 0, &_lock); 282 clk_register_clkdev(clk, "ddr_clk", NULL); 283 284 clk = clk_register_divider(NULL, "apb_clk", "ahb_clk", 285 CLK_SET_RATE_PARENT, CORE_CLK_CFG, PCLK_RATIO_SHIFT, 286 PCLK_RATIO_MASK, 0, &_lock); 287 clk_register_clkdev(clk, "apb_clk", NULL); 288 289 clk = clk_register_gate(NULL, "dma_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 290 DMA_CLK_ENB, 0, &_lock); 291 clk_register_clkdev(clk, NULL, "fc400000.dma"); 292 293 clk = clk_register_gate(NULL, "fsmc_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 294 FSMC_CLK_ENB, 0, &_lock); 295 clk_register_clkdev(clk, NULL, "d1800000.flash"); 296 297 clk = clk_register_gate(NULL, "gmac_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 298 GMAC_CLK_ENB, 0, &_lock); 299 clk_register_clkdev(clk, NULL, "e0800000.ethernet"); 300 301 clk = clk_register_gate(NULL, "i2c_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 302 I2C_CLK_ENB, 0, &_lock); 303 clk_register_clkdev(clk, NULL, "d0200000.i2c"); 304 305 clk = clk_register_gate(NULL, "jpeg_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 306 JPEG_CLK_ENB, 0, &_lock); 307 clk_register_clkdev(clk, NULL, "jpeg"); 308 309 clk = clk_register_gate(NULL, "smi_clk", "ahb_clk", 0, PERIP1_CLK_ENB, 310 SMI_CLK_ENB, 0, &_lock); 311 clk_register_clkdev(clk, NULL, "fc000000.flash"); 312 313 /* clock derived from apb clk */ 314 clk = clk_register_gate(NULL, "adc_clk", "apb_clk", 0, PERIP1_CLK_ENB, 315 ADC_CLK_ENB, 0, &_lock); 316 clk_register_clkdev(clk, NULL, "d820b000.adc"); 317 318 clk = clk_register_fixed_factor(NULL, "gpio0_clk", "apb_clk", 0, 1, 1); 319 clk_register_clkdev(clk, NULL, "f0100000.gpio"); 320 321 clk = clk_register_gate(NULL, "gpio1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 322 GPIO1_CLK_ENB, 0, &_lock); 323 clk_register_clkdev(clk, NULL, "fc980000.gpio"); 324 325 clk = clk_register_gate(NULL, "gpio2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 326 GPIO2_CLK_ENB, 0, &_lock); 327 clk_register_clkdev(clk, NULL, "d8100000.gpio"); 328 329 clk = clk_register_gate(NULL, "ssp0_clk", "apb_clk", 0, PERIP1_CLK_ENB, 330 SSP0_CLK_ENB, 0, &_lock); 331 clk_register_clkdev(clk, NULL, "ssp-pl022.0"); 332 333 clk = clk_register_gate(NULL, "ssp1_clk", "apb_clk", 0, PERIP1_CLK_ENB, 334 SSP1_CLK_ENB, 0, &_lock); 335 clk_register_clkdev(clk, NULL, "ssp-pl022.1"); 336 337 clk = clk_register_gate(NULL, "ssp2_clk", "apb_clk", 0, PERIP1_CLK_ENB, 338 SSP2_CLK_ENB, 0, &_lock); 339 clk_register_clkdev(clk, NULL, "ssp-pl022.2"); 340 } 341