b99db36cdf
arch/arm/mach-omap2/prcm.c and arch/arm/plat-omap/include/plat/prcm.h are now completely unused and can be removed. Signed-off-by: Paul Walmsley <paul@pwsan.com> Tested-by: Vaibhav Hiremath <hvaibhav@ti.com>
140 lines
3.7 KiB
C
140 lines
3.7 KiB
C
/*
|
|
* OMAP2xxx PRM module functions
|
|
*
|
|
* Copyright (C) 2010-2012 Texas Instruments, Inc.
|
|
* Copyright (C) 2010 Nokia Corporation
|
|
* Benoît Cousson
|
|
* Paul Walmsley
|
|
* Rajendra Nayak <rnayak@ti.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/err.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
|
|
#include "common.h"
|
|
#include <plat/cpu.h>
|
|
|
|
#include "vp.h"
|
|
#include "powerdomain.h"
|
|
#include "clockdomain.h"
|
|
#include "prm2xxx.h"
|
|
#include "cm2xxx_3xxx.h"
|
|
#include "prm-regbits-24xx.h"
|
|
|
|
/*
|
|
* omap2xxx_prm_reset_src_map - map from bits in the PRM_RSTST_WKUP
|
|
* hardware register (which are specific to the OMAP2xxx SoCs) to
|
|
* reset source ID bit shifts (which is an OMAP SoC-independent
|
|
* enumeration)
|
|
*/
|
|
static struct prm_reset_src_map omap2xxx_prm_reset_src_map[] = {
|
|
{ OMAP_GLOBALCOLD_RST_SHIFT, OMAP_GLOBAL_COLD_RST_SRC_ID_SHIFT },
|
|
{ OMAP_GLOBALWARM_RST_SHIFT, OMAP_GLOBAL_WARM_RST_SRC_ID_SHIFT },
|
|
{ OMAP24XX_SECU_VIOL_RST_SHIFT, OMAP_SECU_VIOL_RST_SRC_ID_SHIFT },
|
|
{ OMAP24XX_MPU_WD_RST_SHIFT, OMAP_MPU_WD_RST_SRC_ID_SHIFT },
|
|
{ OMAP24XX_SECU_WD_RST_SHIFT, OMAP_SECU_WD_RST_SRC_ID_SHIFT },
|
|
{ OMAP24XX_EXTWMPU_RST_SHIFT, OMAP_EXTWARM_RST_SRC_ID_SHIFT },
|
|
{ -1, -1 },
|
|
};
|
|
|
|
/**
|
|
* omap2xxx_prm_read_reset_sources - return the last SoC reset source
|
|
*
|
|
* Return a u32 representing the last reset sources of the SoC. The
|
|
* returned reset source bits are standardized across OMAP SoCs.
|
|
*/
|
|
static u32 omap2xxx_prm_read_reset_sources(void)
|
|
{
|
|
struct prm_reset_src_map *p;
|
|
u32 r = 0;
|
|
u32 v;
|
|
|
|
v = omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTST);
|
|
|
|
p = omap2xxx_prm_reset_src_map;
|
|
while (p->reg_shift >= 0 && p->std_shift >= 0) {
|
|
if (v & (1 << p->reg_shift))
|
|
r |= 1 << p->std_shift;
|
|
p++;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* omap2xxx_prm_dpll_reset - use DPLL reset to reboot the OMAP SoC
|
|
*
|
|
* Set the DPLL reset bit, which should reboot the SoC. This is the
|
|
* recommended way to restart the SoC. No return value.
|
|
*/
|
|
void omap2xxx_prm_dpll_reset(void)
|
|
{
|
|
omap2_prm_set_mod_reg_bits(OMAP_RST_DPLL3_MASK, WKUP_MOD,
|
|
OMAP2_RM_RSTCTRL);
|
|
/* OCP barrier */
|
|
omap2_prm_read_mod_reg(WKUP_MOD, OMAP2_RM_RSTCTRL);
|
|
}
|
|
|
|
int omap2xxx_clkdm_sleep(struct clockdomain *clkdm)
|
|
{
|
|
omap2_prm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
|
|
clkdm->pwrdm.ptr->prcm_offs,
|
|
OMAP2_PM_PWSTCTRL);
|
|
return 0;
|
|
}
|
|
|
|
int omap2xxx_clkdm_wakeup(struct clockdomain *clkdm)
|
|
{
|
|
omap2_prm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
|
|
clkdm->pwrdm.ptr->prcm_offs,
|
|
OMAP2_PM_PWSTCTRL);
|
|
return 0;
|
|
}
|
|
|
|
struct pwrdm_ops omap2_pwrdm_operations = {
|
|
.pwrdm_set_next_pwrst = omap2_pwrdm_set_next_pwrst,
|
|
.pwrdm_read_next_pwrst = omap2_pwrdm_read_next_pwrst,
|
|
.pwrdm_read_pwrst = omap2_pwrdm_read_pwrst,
|
|
.pwrdm_set_logic_retst = omap2_pwrdm_set_logic_retst,
|
|
.pwrdm_set_mem_onst = omap2_pwrdm_set_mem_onst,
|
|
.pwrdm_set_mem_retst = omap2_pwrdm_set_mem_retst,
|
|
.pwrdm_read_mem_pwrst = omap2_pwrdm_read_mem_pwrst,
|
|
.pwrdm_read_mem_retst = omap2_pwrdm_read_mem_retst,
|
|
.pwrdm_wait_transition = omap2_pwrdm_wait_transition,
|
|
};
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static struct prm_ll_data omap2xxx_prm_ll_data = {
|
|
.read_reset_sources = &omap2xxx_prm_read_reset_sources,
|
|
};
|
|
|
|
static int __init omap2xxx_prm_init(void)
|
|
{
|
|
if (!cpu_is_omap24xx())
|
|
return 0;
|
|
|
|
return prm_register(&omap2xxx_prm_ll_data);
|
|
}
|
|
subsys_initcall(omap2xxx_prm_init);
|
|
|
|
static void __exit omap2xxx_prm_exit(void)
|
|
{
|
|
if (!cpu_is_omap24xx())
|
|
return;
|
|
|
|
/* Should never happen */
|
|
WARN(prm_unregister(&omap2xxx_prm_ll_data),
|
|
"%s: prm_ll_data function pointer mismatch\n", __func__);
|
|
}
|
|
__exitcall(omap2xxx_prm_exit);
|