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![Lokesh Vutla](/assets/img/avatar_default.png)
Updating the Multiplier and Dividers value for all DPLLs. Safest OPP is read from DEV ATTRIBUTE register. Accoring to the value returned the MPU DPLL is locked. At different OPPs follwoing are the MPU locked frequencies. OPP50 300MHz OPP100 600MHz OPP120 720MHz OPPTB 800MHz OPPNT 1000MHz According to the latest DM following is the OPP table dependencies: VDD_CORE VDD_MPU OPP50 OPP50 OPP50 OPP100 OPP100 OPP50 OPP100 OPP100 OPP100 OPP120 So at different OPPs of MPU it is safest to lock CORE at OPP_NOM. Following are the DPLL locking frequencies at OPP NOM: Core locks at 1000MHz Per locks at 960MHz LPDDR2 locks at 266MHz DDR3 locks at 400MHz Touching AM33xx files also to get DPLL values specific to board but no functionality difference. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
/*
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* clock_am33xx.c
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*
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* clocks for AM33XX based boards
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*
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* Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/hardware.h>
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#include <asm/io.h>
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#define OSC (V_OSCK/1000000)
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struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
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struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
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struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
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struct cm_rtc *const cmrtc = (struct cm_rtc *)CM_RTC;
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const struct dpll_regs dpll_mpu_regs = {
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.cm_clkmode_dpll = CM_WKUP + 0x88,
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.cm_idlest_dpll = CM_WKUP + 0x20,
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.cm_clksel_dpll = CM_WKUP + 0x2C,
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.cm_div_m2_dpll = CM_WKUP + 0xA8,
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};
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const struct dpll_regs dpll_core_regs = {
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.cm_clkmode_dpll = CM_WKUP + 0x90,
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.cm_idlest_dpll = CM_WKUP + 0x5C,
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.cm_clksel_dpll = CM_WKUP + 0x68,
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.cm_div_m4_dpll = CM_WKUP + 0x80,
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.cm_div_m5_dpll = CM_WKUP + 0x84,
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.cm_div_m6_dpll = CM_WKUP + 0xD8,
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};
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const struct dpll_regs dpll_per_regs = {
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.cm_clkmode_dpll = CM_WKUP + 0x8C,
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.cm_idlest_dpll = CM_WKUP + 0x70,
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.cm_clksel_dpll = CM_WKUP + 0x9C,
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.cm_div_m2_dpll = CM_WKUP + 0xAC,
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};
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const struct dpll_regs dpll_ddr_regs = {
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.cm_clkmode_dpll = CM_WKUP + 0x94,
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.cm_idlest_dpll = CM_WKUP + 0x34,
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.cm_clksel_dpll = CM_WKUP + 0x40,
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.cm_div_m2_dpll = CM_WKUP + 0xA0,
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};
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struct dpll_params dpll_mpu_opp100 = {
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CONFIG_SYS_MPUCLK, OSC-1, 1, -1, -1, -1, -1};
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const struct dpll_params dpll_core_opp100 = {
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1000, OSC-1, -1, -1, 10, 8, 4};
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const struct dpll_params dpll_mpu = {
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MPUPLL_M_300, OSC-1, 1, -1, -1, -1, -1};
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const struct dpll_params dpll_core = {
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50, OSC-1, -1, -1, 1, 1, 1};
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const struct dpll_params dpll_per = {
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960, OSC-1, 5, -1, -1, -1, -1};
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const struct dpll_params *get_dpll_mpu_params(void)
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{
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return &dpll_mpu;
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}
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const struct dpll_params *get_dpll_core_params(void)
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{
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return &dpll_core;
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}
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const struct dpll_params *get_dpll_per_params(void)
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{
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return &dpll_per;
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}
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void setup_clocks_for_console(void)
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{
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clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
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CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
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CD_CLKCTRL_CLKTRCTRL_SHIFT);
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clrsetbits_le32(&cmper->l4hsclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
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CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
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CD_CLKCTRL_CLKTRCTRL_SHIFT);
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clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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clrsetbits_le32(&cmper->uart1clkctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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clrsetbits_le32(&cmper->uart2clkctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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clrsetbits_le32(&cmper->uart3clkctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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clrsetbits_le32(&cmper->uart4clkctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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clrsetbits_le32(&cmper->uart5clkctrl,
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MODULE_CLKCTRL_MODULEMODE_MASK,
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MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
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MODULE_CLKCTRL_MODULEMODE_SHIFT);
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}
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void enable_basic_clocks(void)
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{
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u32 *const clk_domains[] = {
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&cmper->l3clkstctrl,
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&cmper->l4fwclkstctrl,
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&cmper->l3sclkstctrl,
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&cmper->l4lsclkstctrl,
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&cmwkup->wkclkstctrl,
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&cmper->emiffwclkctrl,
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&cmrtc->clkstctrl,
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0
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};
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u32 *const clk_modules_explicit_en[] = {
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&cmper->l3clkctrl,
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&cmper->l4lsclkctrl,
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&cmper->l4fwclkctrl,
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&cmwkup->wkl4wkclkctrl,
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&cmper->l3instrclkctrl,
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&cmper->l4hsclkctrl,
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&cmwkup->wkgpio0clkctrl,
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&cmwkup->wkctrlclkctrl,
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&cmper->timer2clkctrl,
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&cmper->gpmcclkctrl,
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&cmper->elmclkctrl,
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&cmper->mmc0clkctrl,
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&cmper->mmc1clkctrl,
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&cmwkup->wkup_i2c0ctrl,
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&cmper->gpio1clkctrl,
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&cmper->gpio2clkctrl,
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&cmper->gpio3clkctrl,
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&cmper->i2c1clkctrl,
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&cmper->cpgmac0clkctrl,
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&cmper->spi0clkctrl,
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&cmrtc->rtcclkctrl,
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&cmper->usb0clkctrl,
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&cmper->emiffwclkctrl,
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&cmper->emifclkctrl,
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0
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};
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do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
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/* Select the Master osc 24 MHZ as Timer2 clock source */
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writel(0x1, &cmdpll->clktimer2clk);
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}
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