drivers/clk/ti/clk-43xx.c

   1 /*
   2  * AM43XX 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 am43xx_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_disp_ck", "dpll_disp_ck"),
  44         DT_CLK(NULL, "dpll_disp_m2_ck", "dpll_disp_m2_ck"),
  45         DT_CLK(NULL, "dpll_per_ck", "dpll_per_ck"),
  46         DT_CLK(NULL, "dpll_per_m2_ck", "dpll_per_m2_ck"),
  47         DT_CLK(NULL, "dpll_per_m2_div4_wkupdm_ck", "dpll_per_m2_div4_wkupdm_ck"),
  48         DT_CLK(NULL, "dpll_per_m2_div4_ck", "dpll_per_m2_div4_ck"),
  49         DT_CLK(NULL, "adc_tsc_fck", "adc_tsc_fck"),
  50         DT_CLK(NULL, "clkdiv32k_ck", "clkdiv32k_ck"),
  51         DT_CLK(NULL, "clkdiv32k_ick", "clkdiv32k_ick"),
  52         DT_CLK(NULL, "dcan0_fck", "dcan0_fck"),
  53         DT_CLK(NULL, "dcan1_fck", "dcan1_fck"),
  54         DT_CLK(NULL, "pruss_ocp_gclk", "pruss_ocp_gclk"),
  55         DT_CLK(NULL, "mcasp0_fck", "mcasp0_fck"),
  56         DT_CLK(NULL, "mcasp1_fck", "mcasp1_fck"),
  57         DT_CLK(NULL, "smartreflex0_fck", "smartreflex0_fck"),
  58         DT_CLK(NULL, "smartreflex1_fck", "smartreflex1_fck"),
  59         DT_CLK(NULL, "sha0_fck", "sha0_fck"),
  60         DT_CLK(NULL, "aes0_fck", "aes0_fck"),
  61         DT_CLK(NULL, "rng_fck", "rng_fck"),
  62         DT_CLK(NULL, "timer1_fck", "timer1_fck"),
  63         DT_CLK(NULL, "timer2_fck", "timer2_fck"),
  64         DT_CLK(NULL, "timer3_fck", "timer3_fck"),
  65         DT_CLK(NULL, "timer4_fck", "timer4_fck"),
  66         DT_CLK(NULL, "timer5_fck", "timer5_fck"),
  67         DT_CLK(NULL, "timer6_fck", "timer6_fck"),
  68         DT_CLK(NULL, "timer7_fck", "timer7_fck"),
  69         DT_CLK(NULL, "wdt1_fck", "wdt1_fck"),
  70         DT_CLK(NULL, "l3_gclk", "l3_gclk"),
  71         DT_CLK(NULL, "dpll_core_m4_div2_ck", "dpll_core_m4_div2_ck"),
  72         DT_CLK(NULL, "l4hs_gclk", "l4hs_gclk"),
  73         DT_CLK(NULL, "l3s_gclk", "l3s_gclk"),
  74         DT_CLK(NULL, "l4ls_gclk", "l4ls_gclk"),
  75         DT_CLK(NULL, "clk_24mhz", "clk_24mhz"),
  76         DT_CLK(NULL, "cpsw_125mhz_gclk", "cpsw_125mhz_gclk"),
  77         DT_CLK(NULL, "cpsw_cpts_rft_clk", "cpsw_cpts_rft_clk"),
  78         DT_CLK(NULL, "dpll_clksel_mac_clk", "dpll_clksel_mac_clk"),
  79         DT_CLK(NULL, "gpio0_dbclk_mux_ck", "gpio0_dbclk_mux_ck"),
  80         DT_CLK(NULL, "gpio0_dbclk", "gpio0_dbclk"),
  81         DT_CLK(NULL, "gpio1_dbclk", "gpio1_dbclk"),
  82         DT_CLK(NULL, "gpio2_dbclk", "gpio2_dbclk"),
  83         DT_CLK(NULL, "gpio3_dbclk", "gpio3_dbclk"),
  84         DT_CLK(NULL, "gpio4_dbclk", "gpio4_dbclk"),
  85         DT_CLK(NULL, "gpio5_dbclk", "gpio5_dbclk"),
  86         DT_CLK(NULL, "mmc_clk", "mmc_clk"),
  87         DT_CLK(NULL, "gfx_fclk_clksel_ck", "gfx_fclk_clksel_ck"),
  88         DT_CLK(NULL, "gfx_fck_div_ck", "gfx_fck_div_ck"),
  89         DT_CLK(NULL, "timer_32k_ck", "clkdiv32k_ick"),
  90         DT_CLK(NULL, "timer_sys_ck", "sys_clkin_ck"),
  91         DT_CLK(NULL, "sysclk_div", "sysclk_div"),
  92         DT_CLK(NULL, "disp_clk", "disp_clk"),
  93         DT_CLK(NULL, "clk_32k_mosc_ck", "clk_32k_mosc_ck"),
  94         DT_CLK(NULL, "clk_32k_tpm_ck", "clk_32k_tpm_ck"),
  95         DT_CLK(NULL, "dpll_extdev_ck", "dpll_extdev_ck"),
  96         DT_CLK(NULL, "dpll_extdev_m2_ck", "dpll_extdev_m2_ck"),
  97         DT_CLK(NULL, "mux_synctimer32k_ck", "mux_synctimer32k_ck"),
  98         DT_CLK(NULL, "synctimer_32kclk", "synctimer_32kclk"),
  99         DT_CLK(NULL, "timer8_fck", "timer8_fck"),
 100         DT_CLK(NULL, "timer9_fck", "timer9_fck"),
 101         DT_CLK(NULL, "timer10_fck", "timer10_fck"),
 102         DT_CLK(NULL, "timer11_fck", "timer11_fck"),
 103         DT_CLK(NULL, "cpsw_50m_clkdiv", "cpsw_50m_clkdiv"),
 104         DT_CLK(NULL, "cpsw_5m_clkdiv", "cpsw_5m_clkdiv"),
 105         DT_CLK(NULL, "dpll_ddr_x2_ck", "dpll_ddr_x2_ck"),
 106         DT_CLK(NULL, "dpll_ddr_m4_ck", "dpll_ddr_m4_ck"),
 107         DT_CLK(NULL, "dpll_per_clkdcoldo", "dpll_per_clkdcoldo"),
 108         DT_CLK(NULL, "dll_aging_clk_div", "dll_aging_clk_div"),
 109         DT_CLK(NULL, "div_core_25m_ck", "div_core_25m_ck"),
 110         DT_CLK(NULL, "func_12m_clk", "func_12m_clk"),
 111         DT_CLK(NULL, "vtp_clk_div", "vtp_clk_div"),
 112         DT_CLK(NULL, "usbphy_32khz_clkmux", "usbphy_32khz_clkmux"),
 113         DT_CLK("48300200.ehrpwm", "tbclk", "ehrpwm0_tbclk"),
 114         DT_CLK("48302200.ehrpwm", "tbclk", "ehrpwm1_tbclk"),
 115         DT_CLK("48304200.ehrpwm", "tbclk", "ehrpwm2_tbclk"),
 116         DT_CLK("48306200.ehrpwm", "tbclk", "ehrpwm3_tbclk"),
 117         DT_CLK("48308200.ehrpwm", "tbclk", "ehrpwm4_tbclk"),
 118         DT_CLK("4830a200.ehrpwm", "tbclk", "ehrpwm5_tbclk"),
 119         DT_CLK("48300200.pwm", "tbclk", "ehrpwm0_tbclk"),
 120         DT_CLK("48302200.pwm", "tbclk", "ehrpwm1_tbclk"),
 121         DT_CLK("48304200.pwm", "tbclk", "ehrpwm2_tbclk"),
 122         DT_CLK("48306200.pwm", "tbclk", "ehrpwm3_tbclk"),
 123         DT_CLK("48308200.pwm", "tbclk", "ehrpwm4_tbclk"),
 124         DT_CLK("4830a200.pwm", "tbclk", "ehrpwm5_tbclk"),
 125         { .node_name = NULL },
 126 };
 127
 128 int __init am43xx_dt_clk_init(void)
 129 {
 130         struct clk *clk1, *clk2;
 131
 132         ti_dt_clocks_register(am43xx_clks);
 133
 134         omap2_clk_disable_autoidle_all();
 135
 136         /*
 137          * cpsw_cpts_rft_clk  has got the choice of 3 clocksources
 138          * dpll_core_m4_ck, dpll_core_m5_ck and dpll_disp_m2_ck.
 139          * By default dpll_core_m4_ck is selected, witn this as clock
 140          * source the CPTS doesnot work properly. It gives clockcheck errors
 141          * while running PTP.
 142          * clockcheck: clock jumped backward or running slower than expected!
 143          * By selecting dpll_core_m5_ck as the clocksource fixes this issue.
 144          * In AM335x dpll_core_m5_ck is the default clocksource.
 145          */
 146         clk1 = clk_get_sys(NULL, "cpsw_cpts_rft_clk");
 147         clk2 = clk_get_sys(NULL, "dpll_core_m5_ck");
 148         clk_set_parent(clk1, clk2);
 149
 150         return 0;
 151 }