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https://github.com/AsahiLinux/u-boot
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52f7d8442e
In Errata 1.0.24, if the board is running at OPP50 and has a warm reset, the boot ROM sets the frequencies for OPP100. This patch attempts to drop the frequencies back to OPP50 as soon as possible in the SPL. Then later the voltages and frequencies up set higher. Cc: Enric Balletbo i Serra <eballetbo@iseebcn.com> Cc: Lars Poeschel <poeschel@lemonage.de> Signed-off-by: Steve Kipisz <s-kipisz2@ti.com> [trini: Adapt to current framework] Signed-off-by: Tom Rini <trini@ti.com>
146 lines
4 KiB
C
146 lines
4 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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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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