142 строки
3.9 KiB
C
142 строки
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* linux/arch/arm/mach-omap2/clock.c
|
|
*
|
|
* Copyright (C) 2005-2008 Texas Instruments, Inc.
|
|
* Copyright (C) 2004-2010 Nokia Corporation
|
|
*
|
|
* Contacts:
|
|
* Richard Woodruff <r-woodruff2@ti.com>
|
|
* Paul Walmsley
|
|
*/
|
|
#undef DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/export.h>
|
|
#include <linux/list.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/err.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/io.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/of_address.h>
|
|
#include <asm/cpu.h>
|
|
|
|
#include <trace/events/power.h>
|
|
|
|
#include "soc.h"
|
|
#include "clockdomain.h"
|
|
#include "clock.h"
|
|
#include "cm.h"
|
|
#include "cm2xxx.h"
|
|
#include "cm3xxx.h"
|
|
#include "cm-regbits-24xx.h"
|
|
#include "cm-regbits-34xx.h"
|
|
#include "common.h"
|
|
|
|
u16 cpu_mask;
|
|
|
|
/* DPLL valid Fint frequency band limits - from 34xx TRM Section 4.7.6.2 */
|
|
#define OMAP3430_DPLL_FINT_BAND1_MIN 750000
|
|
#define OMAP3430_DPLL_FINT_BAND1_MAX 2100000
|
|
#define OMAP3430_DPLL_FINT_BAND2_MIN 7500000
|
|
#define OMAP3430_DPLL_FINT_BAND2_MAX 21000000
|
|
|
|
/*
|
|
* DPLL valid Fint frequency range for OMAP36xx and OMAP4xxx.
|
|
* From device data manual section 4.3 "DPLL and DLL Specifications".
|
|
*/
|
|
#define OMAP3PLUS_DPLL_FINT_MIN 32000
|
|
#define OMAP3PLUS_DPLL_FINT_MAX 52000000
|
|
|
|
struct ti_clk_ll_ops omap_clk_ll_ops = {
|
|
.clkdm_clk_enable = clkdm_clk_enable,
|
|
.clkdm_clk_disable = clkdm_clk_disable,
|
|
.clkdm_lookup = clkdm_lookup,
|
|
.cm_wait_module_ready = omap_cm_wait_module_ready,
|
|
.cm_split_idlest_reg = cm_split_idlest_reg,
|
|
};
|
|
|
|
/**
|
|
* omap2_clk_setup_ll_ops - setup clock driver low-level ops
|
|
*
|
|
* Sets up clock driver low-level platform ops. These are needed
|
|
* for register accesses and various other misc platform operations.
|
|
* Returns 0 on success, -EBUSY if low level ops have been registered
|
|
* already.
|
|
*/
|
|
int __init omap2_clk_setup_ll_ops(void)
|
|
{
|
|
return ti_clk_setup_ll_ops(&omap_clk_ll_ops);
|
|
}
|
|
|
|
/*
|
|
* OMAP2+ specific clock functions
|
|
*/
|
|
|
|
/**
|
|
* ti_clk_init_features - init clock features struct for the SoC
|
|
*
|
|
* Initializes the clock features struct based on the SoC type.
|
|
*/
|
|
void __init ti_clk_init_features(void)
|
|
{
|
|
struct ti_clk_features features = { 0 };
|
|
/* Fint setup for DPLLs */
|
|
if (cpu_is_omap3430()) {
|
|
features.fint_min = OMAP3430_DPLL_FINT_BAND1_MIN;
|
|
features.fint_max = OMAP3430_DPLL_FINT_BAND2_MAX;
|
|
features.fint_band1_max = OMAP3430_DPLL_FINT_BAND1_MAX;
|
|
features.fint_band2_min = OMAP3430_DPLL_FINT_BAND2_MIN;
|
|
} else {
|
|
features.fint_min = OMAP3PLUS_DPLL_FINT_MIN;
|
|
features.fint_max = OMAP3PLUS_DPLL_FINT_MAX;
|
|
}
|
|
|
|
/* Bypass value setup for DPLLs */
|
|
if (cpu_is_omap24xx()) {
|
|
features.dpll_bypass_vals |=
|
|
(1 << OMAP2XXX_EN_DPLL_LPBYPASS) |
|
|
(1 << OMAP2XXX_EN_DPLL_FRBYPASS);
|
|
} else if (cpu_is_omap34xx()) {
|
|
features.dpll_bypass_vals |=
|
|
(1 << OMAP3XXX_EN_DPLL_LPBYPASS) |
|
|
(1 << OMAP3XXX_EN_DPLL_FRBYPASS);
|
|
} else if (soc_is_am33xx() || cpu_is_omap44xx() || soc_is_am43xx() ||
|
|
soc_is_omap54xx() || soc_is_dra7xx()) {
|
|
features.dpll_bypass_vals |=
|
|
(1 << OMAP4XXX_EN_DPLL_LPBYPASS) |
|
|
(1 << OMAP4XXX_EN_DPLL_FRBYPASS) |
|
|
(1 << OMAP4XXX_EN_DPLL_MNBYPASS);
|
|
}
|
|
|
|
/* Jitter correction only available on OMAP343X */
|
|
if (cpu_is_omap343x())
|
|
features.flags |= TI_CLK_DPLL_HAS_FREQSEL;
|
|
|
|
if (omap_type() == OMAP2_DEVICE_TYPE_GP)
|
|
features.flags |= TI_CLK_DEVICE_TYPE_GP;
|
|
|
|
/* Idlest value for interface clocks.
|
|
* 24xx uses 0 to indicate not ready, and 1 to indicate ready.
|
|
* 34xx reverses this, just to keep us on our toes
|
|
* AM35xx uses both, depending on the module.
|
|
*/
|
|
if (cpu_is_omap24xx())
|
|
features.cm_idlest_val = OMAP24XX_CM_IDLEST_VAL;
|
|
else if (cpu_is_omap34xx())
|
|
features.cm_idlest_val = OMAP34XX_CM_IDLEST_VAL;
|
|
|
|
/* On OMAP3430 ES1.0, DPLL4 can't be re-programmed */
|
|
if (omap_rev() == OMAP3430_REV_ES1_0)
|
|
features.flags |= TI_CLK_DPLL4_DENY_REPROGRAM;
|
|
|
|
/* Errata I810 for omap5 / dra7 */
|
|
if (soc_is_omap54xx() || soc_is_dra7xx())
|
|
features.flags |= TI_CLK_ERRATA_I810;
|
|
|
|
ti_clk_setup_features(&features);
|
|
}
|