soc: actions: owl-sps: Factor out owl_sps_set_pg() for power-gating

Allow the SMP code to reuse PM domain code for CPU2/CPU3 wakeup.

Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Andreas Färber 2017-06-05 21:04:21 +02:00
parent aa9f800ded
commit 6932ec60cc
5 changed files with 70 additions and 31 deletions

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@ -1,8 +1,12 @@
if ARCH_ACTIONS || COMPILE_TEST
config OWL_PM_DOMAINS_HELPER
bool
config OWL_PM_DOMAINS
bool "Actions Semi SPS power domains"
depends on PM
select OWL_PM_DOMAINS_HELPER
select PM_GENERIC_DOMAINS
help
Say 'y' here to enable support for Smart Power System (SPS)

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@ -1 +1,2 @@
obj-$(CONFIG_OWL_PM_DOMAINS_HELPER) += owl-sps-helper.o
obj-$(CONFIG_OWL_PM_DOMAINS) += owl-sps.o

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@ -0,0 +1,51 @@
/*
* Actions Semi Owl Smart Power System (SPS) shared helpers
*
* Copyright 2012 Actions Semi Inc.
* Author: Actions Semi, Inc.
*
* Copyright (c) 2017 Andreas Färber
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/delay.h>
#include <linux/io.h>
#define OWL_SPS_PG_CTL 0x0
int owl_sps_set_pg(void __iomem *base, u32 pwr_mask, u32 ack_mask, bool enable)
{
u32 val;
bool ack;
int timeout;
val = readl(base + OWL_SPS_PG_CTL);
ack = val & ack_mask;
if (ack == enable)
return 0;
if (enable)
val |= pwr_mask;
else
val &= ~pwr_mask;
writel(val, base + OWL_SPS_PG_CTL);
for (timeout = 5000; timeout > 0; timeout -= 50) {
val = readl(base + OWL_SPS_PG_CTL);
if ((val & ack_mask) == (enable ? ack_mask : 0))
break;
udelay(50);
}
if (timeout <= 0)
return -ETIMEDOUT;
udelay(10);
return 0;
}
EXPORT_SYMBOL_GPL(owl_sps_set_pg);

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@ -12,15 +12,12 @@
* option) any later version.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/pm_domain.h>
#include <linux/soc/actions/owl-sps.h>
#include <dt-bindings/power/owl-s500-powergate.h>
#define OWL_SPS_PG_CTL 0x0
struct owl_sps_domain_info {
const char *name;
int pwr_bit;
@ -51,37 +48,12 @@ struct owl_sps_domain {
static int owl_sps_set_power(struct owl_sps_domain *pd, bool enable)
{
u32 val, pwr_mask, ack_mask;
int timeout;
bool ack;
u32 pwr_mask, ack_mask;
ack_mask = BIT(pd->info->ack_bit);
pwr_mask = BIT(pd->info->pwr_bit);
val = readl(pd->sps->base + OWL_SPS_PG_CTL);
ack = val & ack_mask;
if (ack == enable)
return 0;
if (enable)
val |= pwr_mask;
else
val &= ~pwr_mask;
writel(val, pd->sps->base + OWL_SPS_PG_CTL);
for (timeout = 5000; timeout > 0; timeout -= 50) {
val = readl(pd->sps->base + OWL_SPS_PG_CTL);
if ((val & ack_mask) == (enable ? ack_mask : 0))
break;
udelay(50);
}
if (timeout <= 0)
return -ETIMEDOUT;
udelay(10);
return 0;
return owl_sps_set_pg(pd->sps->base, pwr_mask, ack_mask, enable);
}
static int owl_sps_power_on(struct generic_pm_domain *domain)

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@ -0,0 +1,11 @@
/*
* Copyright (c) 2017 Andreas Färber
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef SOC_ACTIONS_OWL_SPS_H
#define SOC_ACTIONS_OWL_SPS_H
int owl_sps_set_pg(void __iomem *base, u32 pwr_mask, u32 ack_mask, bool enable);
#endif