1 /* 2 * AM33XX Clock init 3 * 4 * Copyright (C) 2013 Texas Instruments, Inc 5 * Tero Kristo (t-kristo@ti.com) 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation version 2. 10 * 11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 12 * kind, whether express or implied; without even the implied warranty 13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/list.h> 19 #include <linux/clk.h> 20 #include <linux/clk-provider.h> 21 #include <linux/clk/ti.h> 22 #include <dt-bindings/clock/am3.h> 23 24 #include "clock.h" 25 26 static const char * const am3_gpio1_dbclk_parents[] __initconst = { 27 "clk-24mhz-clkctrl:0000:0", 28 NULL, 29 }; 30 31 static const struct omap_clkctrl_bit_data am3_gpio2_bit_data[] __initconst = { 32 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, 33 { 0 }, 34 }; 35 36 static const struct omap_clkctrl_bit_data am3_gpio3_bit_data[] __initconst = { 37 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, 38 { 0 }, 39 }; 40 41 static const struct omap_clkctrl_bit_data am3_gpio4_bit_data[] __initconst = { 42 { 18, TI_CLK_GATE, am3_gpio1_dbclk_parents, NULL }, 43 { 0 }, 44 }; 45 46 static const struct omap_clkctrl_reg_data am3_l4ls_clkctrl_regs[] __initconst = { 47 { AM3_L4LS_UART6_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 48 { AM3_L4LS_MMC1_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" }, 49 { AM3_L4LS_ELM_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 50 { AM3_L4LS_I2C3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 51 { AM3_L4LS_I2C2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 52 { AM3_L4LS_SPI0_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 53 { AM3_L4LS_SPI1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 54 { AM3_L4LS_L4_LS_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 55 { AM3_L4LS_UART2_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 56 { AM3_L4LS_UART3_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 57 { AM3_L4LS_UART4_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 58 { AM3_L4LS_UART5_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_ck" }, 59 { AM3_L4LS_TIMER7_CLKCTRL, NULL, CLKF_SW_SUP, "timer7_fck" }, 60 { AM3_L4LS_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "timer2_fck" }, 61 { AM3_L4LS_TIMER3_CLKCTRL, NULL, CLKF_SW_SUP, "timer3_fck" }, 62 { AM3_L4LS_TIMER4_CLKCTRL, NULL, CLKF_SW_SUP, "timer4_fck" }, 63 { AM3_L4LS_RNG_CLKCTRL, NULL, CLKF_SW_SUP, "rng_fck" }, 64 { AM3_L4LS_GPIO2_CLKCTRL, am3_gpio2_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, 65 { AM3_L4LS_GPIO3_CLKCTRL, am3_gpio3_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, 66 { AM3_L4LS_GPIO4_CLKCTRL, am3_gpio4_bit_data, CLKF_SW_SUP, "l4ls_gclk" }, 67 { AM3_L4LS_D_CAN0_CLKCTRL, NULL, CLKF_SW_SUP, "dcan0_fck" }, 68 { AM3_L4LS_D_CAN1_CLKCTRL, NULL, CLKF_SW_SUP, "dcan1_fck" }, 69 { AM3_L4LS_EPWMSS1_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 70 { AM3_L4LS_EPWMSS0_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 71 { AM3_L4LS_EPWMSS2_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 72 { AM3_L4LS_TIMER5_CLKCTRL, NULL, CLKF_SW_SUP, "timer5_fck" }, 73 { AM3_L4LS_TIMER6_CLKCTRL, NULL, CLKF_SW_SUP, "timer6_fck" }, 74 { AM3_L4LS_MMC2_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" }, 75 { AM3_L4LS_SPINLOCK_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 76 { AM3_L4LS_MAILBOX_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 77 { AM3_L4LS_OCPWP_CLKCTRL, NULL, CLKF_SW_SUP, "l4ls_gclk" }, 78 { 0 }, 79 }; 80 81 static const struct omap_clkctrl_reg_data am3_l3s_clkctrl_regs[] __initconst = { 82 { AM3_L3S_USB_OTG_HS_CLKCTRL, NULL, CLKF_SW_SUP, "usbotg_fck" }, 83 { AM3_L3S_GPMC_CLKCTRL, NULL, CLKF_SW_SUP, "l3s_gclk" }, 84 { AM3_L3S_MCASP0_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp0_fck" }, 85 { AM3_L3S_MCASP1_CLKCTRL, NULL, CLKF_SW_SUP, "mcasp1_fck" }, 86 { AM3_L3S_MMC3_CLKCTRL, NULL, CLKF_SW_SUP, "mmc_clk" }, 87 { 0 }, 88 }; 89 90 static const struct omap_clkctrl_reg_data am3_l3_clkctrl_regs[] __initconst = { 91 { AM3_L3_TPTC0_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 92 { AM3_L3_EMIF_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_ddr_m2_div2_ck" }, 93 { AM3_L3_OCMCRAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 94 { AM3_L3_AES_CLKCTRL, NULL, CLKF_SW_SUP, "aes0_fck" }, 95 { AM3_L3_SHAM_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 96 { AM3_L3_TPCC_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 97 { AM3_L3_L3_INSTR_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 98 { AM3_L3_L3_MAIN_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 99 { AM3_L3_TPTC1_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 100 { AM3_L3_TPTC2_CLKCTRL, NULL, CLKF_SW_SUP, "l3_gclk" }, 101 { 0 }, 102 }; 103 104 static const struct omap_clkctrl_reg_data am3_l4hs_clkctrl_regs[] __initconst = { 105 { AM3_L4HS_L4_HS_CLKCTRL, NULL, CLKF_SW_SUP, "l4hs_gclk" }, 106 { 0 }, 107 }; 108 109 static const struct omap_clkctrl_reg_data am3_pruss_ocp_clkctrl_regs[] __initconst = { 110 { AM3_PRUSS_OCP_PRUSS_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "pruss_ocp_gclk" }, 111 { 0 }, 112 }; 113 114 static const struct omap_clkctrl_reg_data am3_cpsw_125mhz_clkctrl_regs[] __initconst = { 115 { AM3_CPSW_125MHZ_CPGMAC0_CLKCTRL, NULL, CLKF_SW_SUP, "cpsw_125mhz_gclk" }, 116 { 0 }, 117 }; 118 119 static const struct omap_clkctrl_reg_data am3_lcdc_clkctrl_regs[] __initconst = { 120 { AM3_LCDC_LCDC_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_SET_RATE_PARENT, "lcd_gclk" }, 121 { 0 }, 122 }; 123 124 static const struct omap_clkctrl_reg_data am3_clk_24mhz_clkctrl_regs[] __initconst = { 125 { AM3_CLK_24MHZ_CLKDIV32K_CLKCTRL, NULL, CLKF_SW_SUP, "clkdiv32k_ck" }, 126 { 0 }, 127 }; 128 129 static const char * const am3_gpio0_dbclk_parents[] __initconst = { 130 "gpio0_dbclk_mux_ck", 131 NULL, 132 }; 133 134 static const struct omap_clkctrl_bit_data am3_gpio1_bit_data[] __initconst = { 135 { 18, TI_CLK_GATE, am3_gpio0_dbclk_parents, NULL }, 136 { 0 }, 137 }; 138 139 static const struct omap_clkctrl_reg_data am3_l4_wkup_clkctrl_regs[] __initconst = { 140 { AM3_L4_WKUP_CONTROL_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, 141 { AM3_L4_WKUP_GPIO1_CLKCTRL, am3_gpio1_bit_data, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, 142 { AM3_L4_WKUP_L4_WKUP_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_core_m4_div2_ck" }, 143 { AM3_L4_WKUP_UART1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" }, 144 { AM3_L4_WKUP_I2C1_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_per_m2_div4_wkupdm_ck" }, 145 { AM3_L4_WKUP_ADC_TSC_CLKCTRL, NULL, CLKF_SW_SUP, "adc_tsc_fck" }, 146 { AM3_L4_WKUP_SMARTREFLEX0_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex0_fck" }, 147 { AM3_L4_WKUP_TIMER1_CLKCTRL, NULL, CLKF_SW_SUP, "timer1_fck" }, 148 { AM3_L4_WKUP_SMARTREFLEX1_CLKCTRL, NULL, CLKF_SW_SUP, "smartreflex1_fck" }, 149 { AM3_L4_WKUP_WD_TIMER2_CLKCTRL, NULL, CLKF_SW_SUP, "wdt1_fck" }, 150 { 0 }, 151 }; 152 153 static const char * const am3_dbg_sysclk_ck_parents[] __initconst = { 154 "sys_clkin_ck", 155 NULL, 156 }; 157 158 static const char * const am3_trace_pmd_clk_mux_ck_parents[] __initconst = { 159 "l3-aon-clkctrl:0000:19", 160 "l3-aon-clkctrl:0000:30", 161 NULL, 162 }; 163 164 static const char * const am3_trace_clk_div_ck_parents[] __initconst = { 165 "l3-aon-clkctrl:0000:20", 166 NULL, 167 }; 168 169 static const struct omap_clkctrl_div_data am3_trace_clk_div_ck_data __initconst = { 170 .max_div = 64, 171 .flags = CLK_DIVIDER_POWER_OF_TWO, 172 }; 173 174 static const char * const am3_stm_clk_div_ck_parents[] __initconst = { 175 "l3-aon-clkctrl:0000:22", 176 NULL, 177 }; 178 179 static const struct omap_clkctrl_div_data am3_stm_clk_div_ck_data __initconst = { 180 .max_div = 64, 181 .flags = CLK_DIVIDER_POWER_OF_TWO, 182 }; 183 184 static const char * const am3_dbg_clka_ck_parents[] __initconst = { 185 "dpll_core_m4_ck", 186 NULL, 187 }; 188 189 static const struct omap_clkctrl_bit_data am3_debugss_bit_data[] __initconst = { 190 { 19, TI_CLK_GATE, am3_dbg_sysclk_ck_parents, NULL }, 191 { 20, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL }, 192 { 22, TI_CLK_MUX, am3_trace_pmd_clk_mux_ck_parents, NULL }, 193 { 24, TI_CLK_DIVIDER, am3_trace_clk_div_ck_parents, &am3_trace_clk_div_ck_data }, 194 { 27, TI_CLK_DIVIDER, am3_stm_clk_div_ck_parents, &am3_stm_clk_div_ck_data }, 195 { 30, TI_CLK_GATE, am3_dbg_clka_ck_parents, NULL }, 196 { 0 }, 197 }; 198 199 static const struct omap_clkctrl_reg_data am3_l3_aon_clkctrl_regs[] __initconst = { 200 { AM3_L3_AON_DEBUGSS_CLKCTRL, am3_debugss_bit_data, CLKF_SW_SUP, "l3-aon-clkctrl:0000:24" }, 201 { 0 }, 202 }; 203 204 static const struct omap_clkctrl_reg_data am3_l4_wkup_aon_clkctrl_regs[] __initconst = { 205 { AM3_L4_WKUP_AON_WKUP_M3_CLKCTRL, NULL, CLKF_NO_IDLEST, "dpll_core_m4_div2_ck" }, 206 { 0 }, 207 }; 208 209 static const struct omap_clkctrl_reg_data am3_mpu_clkctrl_regs[] __initconst = { 210 { AM3_MPU_MPU_CLKCTRL, NULL, CLKF_SW_SUP, "dpll_mpu_m2_ck" }, 211 { 0 }, 212 }; 213 214 static const struct omap_clkctrl_reg_data am3_l4_rtc_clkctrl_regs[] __initconst = { 215 { AM3_L4_RTC_RTC_CLKCTRL, NULL, CLKF_SW_SUP, "clk_32768_ck" }, 216 { 0 }, 217 }; 218 219 static const struct omap_clkctrl_reg_data am3_gfx_l3_clkctrl_regs[] __initconst = { 220 { AM3_GFX_L3_GFX_CLKCTRL, NULL, CLKF_SW_SUP | CLKF_NO_IDLEST, "gfx_fck_div_ck" }, 221 { 0 }, 222 }; 223 224 static const struct omap_clkctrl_reg_data am3_l4_cefuse_clkctrl_regs[] __initconst = { 225 { AM3_L4_CEFUSE_CEFUSE_CLKCTRL, NULL, CLKF_SW_SUP, "sys_clkin_ck" }, 226 { 0 }, 227 }; 228 229 const struct omap_clkctrl_data am3_clkctrl_data[] __initconst = { 230 { 0x44e00038, am3_l4ls_clkctrl_regs }, 231 { 0x44e0001c, am3_l3s_clkctrl_regs }, 232 { 0x44e00024, am3_l3_clkctrl_regs }, 233 { 0x44e00120, am3_l4hs_clkctrl_regs }, 234 { 0x44e000e8, am3_pruss_ocp_clkctrl_regs }, 235 { 0x44e00000, am3_cpsw_125mhz_clkctrl_regs }, 236 { 0x44e00018, am3_lcdc_clkctrl_regs }, 237 { 0x44e0014c, am3_clk_24mhz_clkctrl_regs }, 238 { 0x44e00400, am3_l4_wkup_clkctrl_regs }, 239 { 0x44e00414, am3_l3_aon_clkctrl_regs }, 240 { 0x44e004b0, am3_l4_wkup_aon_clkctrl_regs }, 241 { 0x44e00600, am3_mpu_clkctrl_regs }, 242 { 0x44e00800, am3_l4_rtc_clkctrl_regs }, 243 { 0x44e00900, am3_gfx_l3_clkctrl_regs }, 244 { 0x44e00a00, am3_l4_cefuse_clkctrl_regs }, 245 { 0 }, 246 }; 247 248 static struct ti_dt_clk am33xx_clks[] = { 249 DT_CLK(NULL, "timer_32k_ck", "clk-24mhz-clkctrl:0000:0"), 250 DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"), 251 DT_CLK(NULL, "clkdiv32k_ick", "clk-24mhz-clkctrl:0000:0"), 252 DT_CLK(NULL, "dbg_clka_ck", "l3-aon-clkctrl:0000:30"), 253 DT_CLK(NULL, "dbg_sysclk_ck", "l3-aon-clkctrl:0000:19"), 254 DT_CLK(NULL, "gpio0_dbclk", "l4-wkup-clkctrl:0008:18"), 255 DT_CLK(NULL, "gpio1_dbclk", "l4ls-clkctrl:0074:18"), 256 DT_CLK(NULL, "gpio2_dbclk", "l4ls-clkctrl:0078:18"), 257 DT_CLK(NULL, "gpio3_dbclk", "l4ls-clkctrl:007c:18"), 258 DT_CLK(NULL, "stm_clk_div_ck", "l3-aon-clkctrl:0000:27"), 259 DT_CLK(NULL, "stm_pmd_clock_mux_ck", "l3-aon-clkctrl:0000:22"), 260 DT_CLK(NULL, "trace_clk_div_ck", "l3-aon-clkctrl:0000:24"), 261 DT_CLK(NULL, "trace_pmd_clk_mux_ck", "l3-aon-clkctrl:0000:20"), 262 { .node_name = NULL }, 263 }; 264 265 static const char *enable_init_clks[] = { 266 "dpll_ddr_m2_ck", 267 "dpll_mpu_m2_ck", 268 "l3_gclk", 269 "l4hs_gclk", 270 "l4fw_gclk", 271 "l4ls_gclk", 272 /* Required for external peripherals like, Audio codecs */ 273 "clkout2_ck", 274 }; 275 276 int __init am33xx_dt_clk_init(void) 277 { 278 struct clk *clk1, *clk2; 279 280 if (ti_clk_get_features()->flags & TI_CLK_CLKCTRL_COMPAT) 281 ti_dt_clocks_register(am33xx_compat_clks); 282 else 283 ti_dt_clocks_register(am33xx_clks); 284 285 omap2_clk_disable_autoidle_all(); 286 287 ti_clk_add_aliases(); 288 289 omap2_clk_enable_init_clocks(enable_init_clks, 290 ARRAY_SIZE(enable_init_clks)); 291 292 /* TRM ERRATA: Timer 3 & 6 default parent (TCLKIN) may not be always 293 * physically present, in such a case HWMOD enabling of 294 * clock would be failure with default parent. And timer 295 * probe thinks clock is already enabled, this leads to 296 * crash upon accessing timer 3 & 6 registers in probe. 297 * Fix by setting parent of both these timers to master 298 * oscillator clock. 299 */ 300 301 clk1 = clk_get_sys(NULL, "sys_clkin_ck"); 302 clk2 = clk_get_sys(NULL, "timer3_fck"); 303 clk_set_parent(clk2, clk1); 304 305 clk2 = clk_get_sys(NULL, "timer6_fck"); 306 clk_set_parent(clk2, clk1); 307 /* 308 * The On-Chip 32K RC Osc clock is not an accurate clock-source as per 309 * the design/spec, so as a result, for example, timer which supposed 310 * to get expired @60Sec, but will expire somewhere ~@40Sec, which is 311 * not expected by any use-case, so change WDT1 clock source to PRCM 312 * 32KHz clock. 313 */ 314 clk1 = clk_get_sys(NULL, "wdt1_fck"); 315 clk2 = clk_get_sys(NULL, "clkdiv32k_ick"); 316 clk_set_parent(clk1, clk2); 317 318 return 0; 319 } 320