142 lines
4 KiB
C
142 lines
4 KiB
C
/*
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* linux/arch/arm/mach-omap2/clock.c
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*
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* Copyright (C) 2005-2008 Texas Instruments, Inc.
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* Copyright (C) 2004-2010 Nokia Corporation
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*
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* Contacts:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#undef DEBUG
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/io.h>
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#include <linux/bitops.h>
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#include <linux/of_address.h>
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#include <asm/cpu.h>
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#include <trace/events/power.h>
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#include "soc.h"
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#include "clockdomain.h"
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#include "clock.h"
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#include "cm.h"
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#include "cm2xxx.h"
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#include "cm3xxx.h"
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#include "cm-regbits-24xx.h"
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#include "cm-regbits-34xx.h"
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#include "common.h"
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u16 cpu_mask;
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/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
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#define OMAP3430_DPLL_FINT_BAND1_MIN 750000
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#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000
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#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000
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#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000
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/*
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* DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx.
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* From device data manual section 4.3 "DPLL and DLL Specifications".
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*/
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#define OMAP3PLUS_DPLL_FINT_MIN 32000
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#define OMAP3PLUS_DPLL_FINT_MAX 52000000
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struct ti_clk_ll_ops omap_clk_ll_ops = {
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.clkdm_clk_enable = clkdm_clk_enable,
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.clkdm_clk_disable = clkdm_clk_disable,
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.clkdm_lookup = clkdm_lookup,
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.cm_wait_module_ready = omap_cm_wait_module_ready,
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.cm_split_idlest_reg = cm_split_idlest_reg,
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};
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/**
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* omap2_clk_setup_ll_ops - setup clock driver low-level ops
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*
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* Sets up clock driver low-level platform ops. These are needed
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* for register accesses and various other misc platform operations.
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* Returns 0 on success, -EBUSY if low level ops have been registered
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* already.
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*/
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int __init omap2_clk_setup_ll_ops(void)
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{
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return ti_clk_setup_ll_ops(&omap_clk_ll_ops);
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}
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/*
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* OMAP2+ specific clock functions
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*/
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/**
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* ti_clk_init_features - init clock features struct for the SoC
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*
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* Initializes the clock features struct based on the SoC type.
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*/
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void __init ti_clk_init_features(void)
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{
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struct ti_clk_features features = { 0 };
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/* Fint setup for DPLLs */
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if (cpu_is_omap3430()) {
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features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
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features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
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features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX;
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features.fint_band2_min = OMAP3430_DPLL_FINT_BAND2_MIN;
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} else {
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features.fint_min = OMAP3PLUS_DPLL_FINT_MIN;
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features.fint_max = OMAP3PLUS_DPLL_FINT_MAX;
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}
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/* Bypass value setup for DPLLs */
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if (cpu_is_omap24xx()) {
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features.dpll_bypass_vals |=
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(1 << OMAP2XXX_EN_DPLL_LPBYPASS) |
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(1 << OMAP2XXX_EN_DPLL_FRBYPASS);
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} else if (cpu_is_omap34xx()) {
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features.dpll_bypass_vals |=
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(1 << OMAP3XXX_EN_DPLL_LPBYPASS) |
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(1 << OMAP3XXX_EN_DPLL_FRBYPASS);
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} else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx() ||
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soc_is_omap54xx() || soc_is_dra7xx()) {
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features.dpll_bypass_vals |=
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(1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
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(1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
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(1 << OMAP4XXX_EN_DPLL_MNBYPASS);
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}
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/* Jitter correction only available on OMAP343X */
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if (cpu_is_omap343x())
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features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
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/* Idlest value for interface clocks.
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* 24xx uses 0 to indicate not ready, and 1 to indicate ready.
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* 34xx reverses this, just to keep us on our toes
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* AM35xx uses both, depending on the module.
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*/
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if (cpu_is_omap24xx())
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features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
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else if (cpu_is_omap34xx())
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features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
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/* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */
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if (omap_rev() == OMAP3430_REV_ES1_0)
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features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;
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/* Errata I810 for omap5 / dra7 */
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if (soc_is_omap54xx() || soc_is_dra7xx())
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features.flags |= TI_CLK_ERRATA_I810;
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ti_clk_setup_features(&features);
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}
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