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 23 #include "clock.h" 24 25 static struct ti_dt_clk am33xx_clks[] = { 26 DT_CLK(NULL, "clk_32768_ck", "clk_32768_ck"), 27 DT_CLK(NULL, "clk_rc32k_ck", "clk_rc32k_ck"), 28 DT_CLK(NULL, "virt_19200000_ck", "virt_19200000_ck"), 29 DT_CLK(NULL, "virt_24000000_ck", "virt_24000000_ck"), 30 DT_CLK(NULL, "virt_25000000_ck", "virt_25000000_ck"), 31 DT_CLK(NULL, "virt_26000000_ck", "virt_26000000_ck"), 32 DT_CLK(NULL, "sys_clkin_ck", "sys_clkin_ck"), 33 DT_CLK(NULL, "tclkin_ck", "tclkin_ck"), 34 DT_CLK(NULL, "dpll_core_ck", "dpll_core_ck"), 35 DT_CLK(NULL, "dpll_core_x2_ck", "dpll_core_x2_ck"), 36 DT_CLK(NULL, "dpll_core_m4_ck", "dpll_core_m4_ck"), 37 DT_CLK(NULL, "dpll_core_m5_ck", "dpll_core_m5_ck"), 38 DT_CLK(NULL, "dpll_core_m6_ck", "dpll_core_m6_ck"), 39 DT_CLK(NULL, "dpll_mpu_ck", "dpll_mpu_ck"), 40 DT_CLK(NULL, "dpll_mpu_m2_ck", "dpll_mpu_m2_ck"), 41 DT_CLK(NULL, "dpll_ddr_ck", "dpll_ddr_ck"), 42 DT_CLK(NULL, "dpll_ddr_m2_ck", "dpll_ddr_m2_ck"), 43 DT_CLK(NULL, "dpll_ddr_m2_div2_ck", "dpll_ddr_m2_div2_ck"), 44 DT_CLK(NULL, "dpll_disp_ck", "dpll_disp_ck"), 45 DT_CLK(NULL, "dpll_disp_m2_ck", "dpll_disp_m2_ck"), 46 DT_CLK(NULL, "dpll_per_ck", "dpll_per_ck"), 47 DT_CLK(NULL, "dpll_per_m2_ck", "dpll_per_m2_ck"), 48 DT_CLK(NULL, "dpll_per_m2_div4_wkupdm_ck", "dpll_per_m2_div4_wkupdm_ck"), 49 DT_CLK(NULL, "dpll_per_m2_div4_ck", "dpll_per_m2_div4_ck"), 50 DT_CLK(NULL, "adc_tsc_fck", "adc_tsc_fck"), 51 DT_CLK(NULL, "cefuse_fck", "cefuse_fck"), 52 DT_CLK(NULL, "clkdiv32k_ck", "clkdiv32k_ck"), 53 DT_CLK(NULL, "clkdiv32k_ick", "clkdiv32k_ick"), 54 DT_CLK(NULL, "dcan0_fck", "dcan0_fck"), 55 DT_CLK("481cc000.d_can", NULL, "dcan0_fck"), 56 DT_CLK(NULL, "dcan1_fck", "dcan1_fck"), 57 DT_CLK("481d0000.d_can", NULL, "dcan1_fck"), 58 DT_CLK(NULL, "pruss_ocp_gclk", "pruss_ocp_gclk"), 59 DT_CLK(NULL, "mcasp0_fck", "mcasp0_fck"), 60 DT_CLK(NULL, "mcasp1_fck", "mcasp1_fck"), 61 DT_CLK(NULL, "mmu_fck", "mmu_fck"), 62 DT_CLK(NULL, "smartreflex0_fck", "smartreflex0_fck"), 63 DT_CLK(NULL, "smartreflex1_fck", "smartreflex1_fck"), 64 DT_CLK(NULL, "sha0_fck", "sha0_fck"), 65 DT_CLK(NULL, "aes0_fck", "aes0_fck"), 66 DT_CLK(NULL, "rng_fck", "rng_fck"), 67 DT_CLK(NULL, "timer1_fck", "timer1_fck"), 68 DT_CLK(NULL, "timer2_fck", "timer2_fck"), 69 DT_CLK(NULL, "timer3_fck", "timer3_fck"), 70 DT_CLK(NULL, "timer4_fck", "timer4_fck"), 71 DT_CLK(NULL, "timer5_fck", "timer5_fck"), 72 DT_CLK(NULL, "timer6_fck", "timer6_fck"), 73 DT_CLK(NULL, "timer7_fck", "timer7_fck"), 74 DT_CLK(NULL, "usbotg_fck", "usbotg_fck"), 75 DT_CLK(NULL, "ieee5000_fck", "ieee5000_fck"), 76 DT_CLK(NULL, "wdt1_fck", "wdt1_fck"), 77 DT_CLK(NULL, "l4_rtc_gclk", "l4_rtc_gclk"), 78 DT_CLK(NULL, "l3_gclk", "l3_gclk"), 79 DT_CLK(NULL, "dpll_core_m4_div2_ck", "dpll_core_m4_div2_ck"), 80 DT_CLK(NULL, "l4hs_gclk", "l4hs_gclk"), 81 DT_CLK(NULL, "l3s_gclk", "l3s_gclk"), 82 DT_CLK(NULL, "l4fw_gclk", "l4fw_gclk"), 83 DT_CLK(NULL, "l4ls_gclk", "l4ls_gclk"), 84 DT_CLK(NULL, "clk_24mhz", "clk_24mhz"), 85 DT_CLK(NULL, "sysclk_div_ck", "sysclk_div_ck"), 86 DT_CLK(NULL, "cpsw_125mhz_gclk", "cpsw_125mhz_gclk"), 87 DT_CLK(NULL, "cpsw_cpts_rft_clk", "cpsw_cpts_rft_clk"), 88 DT_CLK(NULL, "gpio0_dbclk_mux_ck", "gpio0_dbclk_mux_ck"), 89 DT_CLK(NULL, "gpio0_dbclk", "gpio0_dbclk"), 90 DT_CLK(NULL, "gpio1_dbclk", "gpio1_dbclk"), 91 DT_CLK(NULL, "gpio2_dbclk", "gpio2_dbclk"), 92 DT_CLK(NULL, "gpio3_dbclk", "gpio3_dbclk"), 93 DT_CLK(NULL, "lcd_gclk", "lcd_gclk"), 94 DT_CLK(NULL, "mmc_clk", "mmc_clk"), 95 DT_CLK(NULL, "gfx_fclk_clksel_ck", "gfx_fclk_clksel_ck"), 96 DT_CLK(NULL, "gfx_fck_div_ck", "gfx_fck_div_ck"), 97 DT_CLK(NULL, "sysclkout_pre_ck", "sysclkout_pre_ck"), 98 DT_CLK(NULL, "clkout2_div_ck", "clkout2_div_ck"), 99 DT_CLK(NULL, "timer_32k_ck", "clkdiv32k_ick"), 100 DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"), 101 DT_CLK(NULL, "dbg_sysclk_ck", "dbg_sysclk_ck"), 102 DT_CLK(NULL, "dbg_clka_ck", "dbg_clka_ck"), 103 DT_CLK(NULL, "stm_pmd_clock_mux_ck", "stm_pmd_clock_mux_ck"), 104 DT_CLK(NULL, "trace_pmd_clk_mux_ck", "trace_pmd_clk_mux_ck"), 105 DT_CLK(NULL, "stm_clk_div_ck", "stm_clk_div_ck"), 106 DT_CLK(NULL, "trace_clk_div_ck", "trace_clk_div_ck"), 107 DT_CLK(NULL, "clkout2_ck", "clkout2_ck"), 108 DT_CLK("48300200.ehrpwm", "tbclk", "ehrpwm0_tbclk"), 109 DT_CLK("48302200.ehrpwm", "tbclk", "ehrpwm1_tbclk"), 110 DT_CLK("48304200.ehrpwm", "tbclk", "ehrpwm2_tbclk"), 111 { .node_name = NULL }, 112 }; 113 114 static const char *enable_init_clks[] = { 115 "dpll_ddr_m2_ck", 116 "dpll_mpu_m2_ck", 117 "l3_gclk", 118 "l4hs_gclk", 119 "l4fw_gclk", 120 "l4ls_gclk", 121 /* Required for external peripherals like, Audio codecs */ 122 "clkout2_ck", 123 }; 124 125 int __init am33xx_dt_clk_init(void) 126 { 127 struct clk *clk1, *clk2; 128 129 ti_dt_clocks_register(am33xx_clks); 130 131 omap2_clk_disable_autoidle_all(); 132 133 omap2_clk_enable_init_clocks(enable_init_clks, 134 ARRAY_SIZE(enable_init_clks)); 135 136 /* TRM ERRATA: Timer 3 & 6 default parent (TCLKIN) may not be always 137 * physically present, in such a case HWMOD enabling of 138 * clock would be failure with default parent. And timer 139 * probe thinks clock is already enabled, this leads to 140 * crash upon accessing timer 3 & 6 registers in probe. 141 * Fix by setting parent of both these timers to master 142 * oscillator clock. 143 */ 144 145 clk1 = clk_get_sys(NULL, "sys_clkin_ck"); 146 clk2 = clk_get_sys(NULL, "timer3_fck"); 147 clk_set_parent(clk2, clk1); 148 149 clk2 = clk_get_sys(NULL, "timer6_fck"); 150 clk_set_parent(clk2, clk1); 151 /* 152 * The On-Chip 32K RC Osc clock is not an accurate clock-source as per 153 * the design/spec, so as a result, for example, timer which supposed 154 * to get expired @60Sec, but will expire somewhere ~@40Sec, which is 155 * not expected by any use-case, so change WDT1 clock source to PRCM 156 * 32KHz clock. 157 */ 158 clk1 = clk_get_sys(NULL, "wdt1_fck"); 159 clk2 = clk_get_sys(NULL, "clkdiv32k_ick"); 160 clk_set_parent(clk1, clk2); 161 162 return 0; 163 } 164