linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * R-Car SYSC Power management support

 *

 * Copyright (C) 2014  Magnus Damm

 * Copyright (C) 2015-2017 Glider bvba

 */

​

#include <linux/clk/renesas.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/mm.h>

#include <linux/of_address.h>

#include <linux/pm_domain.h>

#include <linux/slab.h>

#include <linux/spinlock.h>

#include <linux/io.h>

#include <linux/soc/renesas/rcar-sysc.h>

​

#include "rcar-sysc.h"

​

/* SYSC Common */

#define SYSCSR          0x00    /* SYSC Status Register */

#define SYSCISR         0x04    /* Interrupt Status Register */

#define SYSCISCR        0x08    /* Interrupt Status Clear Register */

#define SYSCIER         0x0c    /* Interrupt Enable Register */

#define SYSCIMR         0x10    /* Interrupt Mask Register */

​

/* SYSC Status Register */

#define SYSCSR_PONENB       1   /* Ready for power resume requests */

#define SYSCSR_POFFENB      0   /* Ready for power shutoff requests */

​

/*

 * Power Control Register Offsets inside the register block for each domain

 * Note: The "CR" registers for ARM cores exist on H1 only

 *   Use WFI to power off, CPG/APMU to resume ARM cores on R-Car Gen2

 *   Use PSCI on R-Car Gen3

 */

#define PWRSR_OFFS      0x00    /* Power Status Register */

#define PWROFFCR_OFFS       0x04    /* Power Shutoff Control Register */

#define PWROFFSR_OFFS       0x08    /* Power Shutoff Status Register */

#define PWRONCR_OFFS        0x0c    /* Power Resume Control Register */

#define PWRONSR_OFFS        0x10    /* Power Resume Status Register */

#define PWRER_OFFS      0x14    /* Power Shutoff/Resume Error */

​

​

#define SYSCSR_RETRIES      100

#define SYSCSR_DELAY_US     1

​

#define PWRER_RETRIES       100

#define PWRER_DELAY_US      1

​

#define SYSCISR_RETRIES     1000

#define SYSCISR_DELAY_US    1

​

#define RCAR_PD_ALWAYS_ON   32  /* Always-on power area */

​

struct rcar_sysc_ch {

    u16 chan_offs;

    u8 chan_bit;

    u8 isr_bit;

};

​