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/*
* MPC85xx PM operators
*
* Copyright 2015 Freescale Semiconductor Inc.
*
* 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.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/fsl/guts.h>
#include <asm/io.h>
#include <asm/fsl_pm.h>
static struct ccsr_guts __iomem *guts;
static void mpc85xx_irq_mask(int cpu)
{
}
static void mpc85xx_irq_unmask(int cpu)
{
}
static void mpc85xx_cpu_die(int cpu)
{
u32 tmp;
tmp = (mfspr(SPRN_HID0) & ~(HID0_DOZE|HID0_SLEEP)) | HID0_NAP;
mtspr(SPRN_HID0, tmp);
/* Enter NAP mode. */
tmp = mfmsr();
tmp |= MSR_WE;
asm volatile(
"msync\n"
"mtmsr %0\n"
"isync\n"
:
: "r" (tmp));
}
static void mpc85xx_cpu_up_prepare(int cpu)
{
}
static void mpc85xx_freeze_time_base(bool freeze)
{
uint32_t mask;
mask = CCSR_GUTS_DEVDISR_TB0 | CCSR_GUTS_DEVDISR_TB1;
if (freeze)
setbits32(&guts->devdisr, mask);
else
clrbits32(&guts->devdisr, mask);
in_be32(&guts->devdisr);
}
static const struct of_device_id mpc85xx_smp_guts_ids[] = {
{ .compatible = "fsl,mpc8572-guts", },
{ .compatible = "fsl,p1020-guts", },
{ .compatible = "fsl,p1021-guts", },
{ .compatible = "fsl,p1022-guts", },
{ .compatible = "fsl,p1023-guts", },
{ .compatible = "fsl,p2020-guts", },
{ .compatible = "fsl,bsc9132-guts", },
{},
};
static const struct fsl_pm_ops mpc85xx_pm_ops = {
.freeze_time_base = mpc85xx_freeze_time_base,
.irq_mask = mpc85xx_irq_mask,
.irq_unmask = mpc85xx_irq_unmask,
.cpu_die = mpc85xx_cpu_die,
.cpu_up_prepare = mpc85xx_cpu_up_prepare,
};
int __init mpc85xx_setup_pmc(void)
{
struct device_node *np;
np = of_find_matching_node(NULL, mpc85xx_smp_guts_ids);
if (np) {
guts = of_iomap(np, 0);
of_node_put(np);
if (!guts) {
pr_err("Could not map guts node address\n");
return -ENOMEM;
}
}
qoriq_pm_ops = &mpc85xx_pm_ops;
return 0;
}
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