107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
/*
|
|
* 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;
|
|
}
|