mirror of https://gitee.com/openkylin/linux.git
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/*
|
|
* OMAP4 clockdomain control
|
|
*
|
|
* Copyright (C) 2008-2010 Texas Instruments, Inc.
|
|
* Copyright (C) 2008-2010 Nokia Corporation
|
|
*
|
|
* Derived from mach-omap2/clockdomain.c written by 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 "clockdomain.h"
|
|
#include "cminst44xx.h"
|
|
#include "cm44xx.h"
|
|
|
|
static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1,
|
|
struct clockdomain *clkdm2)
|
|
{
|
|
omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit),
|
|
clkdm1->prcm_partition,
|
|
clkdm1->cm_inst, clkdm1->clkdm_offs +
|
|
OMAP4_CM_STATICDEP);
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1,
|
|
struct clockdomain *clkdm2)
|
|
{
|
|
omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit),
|
|
clkdm1->prcm_partition,
|
|
clkdm1->cm_inst, clkdm1->clkdm_offs +
|
|
OMAP4_CM_STATICDEP);
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1,
|
|
struct clockdomain *clkdm2)
|
|
{
|
|
return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition,
|
|
clkdm1->cm_inst, clkdm1->clkdm_offs +
|
|
OMAP4_CM_STATICDEP,
|
|
(1 << clkdm2->dep_bit));
|
|
}
|
|
|
|
static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)
|
|
{
|
|
struct clkdm_dep *cd;
|
|
u32 mask = 0;
|
|
|
|
for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
|
|
if (!omap_chip_is(cd->omap_chip))
|
|
continue;
|
|
if (!cd->clkdm)
|
|
continue; /* only happens if data is erroneous */
|
|
|
|
mask |= 1 << cd->clkdm->dep_bit;
|
|
atomic_set(&cd->wkdep_usecount, 0);
|
|
}
|
|
|
|
omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs +
|
|
OMAP4_CM_STATICDEP);
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_clkdm_sleep(struct clockdomain *clkdm)
|
|
{
|
|
omap4_cminst_clkdm_force_sleep(clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs);
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_clkdm_wakeup(struct clockdomain *clkdm)
|
|
{
|
|
omap4_cminst_clkdm_force_wakeup(clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs);
|
|
return 0;
|
|
}
|
|
|
|
static void omap4_clkdm_allow_idle(struct clockdomain *clkdm)
|
|
{
|
|
omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs);
|
|
}
|
|
|
|
static void omap4_clkdm_deny_idle(struct clockdomain *clkdm)
|
|
{
|
|
omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs);
|
|
}
|
|
|
|
static int omap4_clkdm_clk_enable(struct clockdomain *clkdm)
|
|
{
|
|
if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
|
|
return omap4_clkdm_wakeup(clkdm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_clkdm_clk_disable(struct clockdomain *clkdm)
|
|
{
|
|
bool hwsup = false;
|
|
|
|
hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
|
|
clkdm->cm_inst, clkdm->clkdm_offs);
|
|
|
|
if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
|
|
omap4_clkdm_sleep(clkdm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct clkdm_ops omap4_clkdm_operations = {
|
|
.clkdm_add_wkdep = omap4_clkdm_add_wkup_sleep_dep,
|
|
.clkdm_del_wkdep = omap4_clkdm_del_wkup_sleep_dep,
|
|
.clkdm_read_wkdep = omap4_clkdm_read_wkup_sleep_dep,
|
|
.clkdm_clear_all_wkdeps = omap4_clkdm_clear_all_wkup_sleep_deps,
|
|
.clkdm_add_sleepdep = omap4_clkdm_add_wkup_sleep_dep,
|
|
.clkdm_del_sleepdep = omap4_clkdm_del_wkup_sleep_dep,
|
|
.clkdm_read_sleepdep = omap4_clkdm_read_wkup_sleep_dep,
|
|
.clkdm_clear_all_sleepdeps = omap4_clkdm_clear_all_wkup_sleep_deps,
|
|
.clkdm_sleep = omap4_clkdm_sleep,
|
|
.clkdm_wakeup = omap4_clkdm_wakeup,
|
|
.clkdm_allow_idle = omap4_clkdm_allow_idle,
|
|
.clkdm_deny_idle = omap4_clkdm_deny_idle,
|
|
.clkdm_clk_enable = omap4_clkdm_clk_enable,
|
|
.clkdm_clk_disable = omap4_clkdm_clk_disable,
|
|
};
|