arch/arm/cpu/armv7/am33xx/clock_am43xx.c

   1 /*
   2  * clock_am43xx.c
   3  *
   4  * clocks for AM43XX based boards
   5  * Derived from AM33XX based boards
   6  *
   7  * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
   8  *
   9  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 #include <common.h>
  13 #include <asm/arch/cpu.h>
  14 #include <asm/arch/clock.h>
  15 #include <asm/arch/hardware.h>
  16 #include <asm/arch/sys_proto.h>
  17 #include <asm/io.h>
  18
  19 struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
  20 struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
  21 struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
  22
  23 const struct dpll_regs dpll_mpu_regs = {
  24         .cm_clkmode_dpll        = CM_WKUP + 0x560,
  25         .cm_idlest_dpll         = CM_WKUP + 0x564,
  26         .cm_clksel_dpll         = CM_WKUP + 0x56c,
  27         .cm_div_m2_dpll         = CM_WKUP + 0x570,
  28 };
  29
  30 const struct dpll_regs dpll_core_regs = {
  31         .cm_clkmode_dpll        = CM_WKUP + 0x520,
  32         .cm_idlest_dpll         = CM_WKUP + 0x524,
  33         .cm_clksel_dpll         = CM_WKUP + 0x52C,
  34         .cm_div_m4_dpll         = CM_WKUP + 0x538,
  35         .cm_div_m5_dpll         = CM_WKUP + 0x53C,
  36         .cm_div_m6_dpll         = CM_WKUP + 0x540,
  37 };
  38
  39 const struct dpll_regs dpll_per_regs = {
  40         .cm_clkmode_dpll        = CM_WKUP + 0x5E0,
  41         .cm_idlest_dpll         = CM_WKUP + 0x5E4,
  42         .cm_clksel_dpll         = CM_WKUP + 0x5EC,
  43         .cm_div_m2_dpll         = CM_WKUP + 0x5F0,
  44 };
  45
  46 const struct dpll_regs dpll_ddr_regs = {
  47         .cm_clkmode_dpll        = CM_WKUP + 0x5A0,
  48         .cm_idlest_dpll         = CM_WKUP + 0x5A4,
  49         .cm_clksel_dpll         = CM_WKUP + 0x5AC,
  50         .cm_div_m2_dpll         = CM_WKUP + 0x5B0,
  51         .cm_div_m4_dpll         = CM_WKUP + 0x5B8,
  52 };
  53
  54 void setup_clocks_for_console(void)
  55 {
  56         u32 clkctrl, idlest = MODULE_CLKCTRL_IDLEST_DISABLED;
  57
  58         /* Do not add any spl_debug prints in this function */
  59         clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
  60                         CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
  61                         CD_CLKCTRL_CLKTRCTRL_SHIFT);
  62
  63         /* Enable UART0 */
  64         clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
  65                         MODULE_CLKCTRL_MODULEMODE_MASK,
  66                         MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
  67                         MODULE_CLKCTRL_MODULEMODE_SHIFT);
  68
  69         while ((idlest == MODULE_CLKCTRL_IDLEST_DISABLED) ||
  70                 (idlest == MODULE_CLKCTRL_IDLEST_TRANSITIONING)) {
  71                 clkctrl = readl(&cmwkup->wkup_uart0ctrl);
  72                 idlest = (clkctrl & MODULE_CLKCTRL_IDLEST_MASK) >>
  73                          MODULE_CLKCTRL_IDLEST_SHIFT;
  74         }
  75 }
  76
  77 void enable_basic_clocks(void)
  78 {
  79         u32 *const clk_domains[] = {
  80                 &cmper->l3clkstctrl,
  81                 &cmper->l3sclkstctrl,
  82                 &cmper->l4lsclkstctrl,
  83                 &cmwkup->wkclkstctrl,
  84                 &cmper->emifclkstctrl,
  85                 0
  86         };
  87
  88         u32 *const clk_modules_explicit_en[] = {
  89                 &cmper->l3clkctrl,
  90                 &cmper->l4lsclkctrl,
  91                 &cmper->l4fwclkctrl,
  92                 &cmwkup->wkl4wkclkctrl,
  93                 &cmper->l3instrclkctrl,
  94                 &cmper->l4hsclkctrl,
  95                 &cmwkup->wkgpio0clkctrl,
  96                 &cmwkup->wkctrlclkctrl,
  97                 &cmper->timer2clkctrl,
  98                 &cmper->gpmcclkctrl,
  99                 &cmper->elmclkctrl,
 100                 &cmper->mmc0clkctrl,
 101                 &cmper->mmc1clkctrl,
 102                 &cmwkup->wkup_i2c0ctrl,
 103                 &cmper->gpio1clkctrl,
 104                 &cmper->gpio2clkctrl,
 105                 &cmper->gpio3clkctrl,
 106                 &cmper->gpio4clkctrl,
 107                 &cmper->gpio5clkctrl,
 108                 &cmper->i2c1clkctrl,
 109                 &cmper->cpgmac0clkctrl,
 110                 &cmper->emiffwclkctrl,
 111                 &cmper->emifclkctrl,
 112                 &cmper->otfaemifclkctrl,
 113                 &cmper->qspiclkctrl,
 114                 0
 115         };
 116
 117         do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
 118
 119         /* Select the Master osc clk as Timer2 clock source */
 120         writel(0x1, &cmdpll->clktimer2clk);
 121 }