linux-imx

/*

 * ti-sysc.c - Texas Instruments sysc interconnect target driver

 *

 * 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.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/io.h>

#include <linux/clk.h>

#include <linux/clkdev.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_domain.h>

#include <linux/pm_runtime.h>

#include <linux/reset.h>

#include <linux/of_address.h>

#include <linux/of_platform.h>

#include <linux/slab.h>

#include <linux/iopoll.h>

​

#include <linux/platform_data/ti-sysc.h>

​

#include <dt-bindings/bus/ti-sysc.h>

​

#define MAX_MODULE_SOFTRESET_WAIT       10000

​

static const char * const reg_names[] = { "rev", "sysc", "syss", };

​

enum sysc_clocks {

    SYSC_FCK,

    SYSC_ICK,

    SYSC_OPTFCK0,

    SYSC_OPTFCK1,

    SYSC_OPTFCK2,

    SYSC_OPTFCK3,

    SYSC_OPTFCK4,

    SYSC_OPTFCK5,

    SYSC_OPTFCK6,

    SYSC_OPTFCK7,

    SYSC_MAX_CLOCKS,

};

​

static const char * const clock_names[SYSC_ICK + 1] = { "fck", "ick", };

​

#define SYSC_IDLEMODE_MASK      3

#define SYSC_CLOCKACTIVITY_MASK     3

​

/**

 * struct sysc - TI sysc interconnect target module registers and capabilities

 * @dev: struct device pointer

 * @module_pa: physical address of the interconnect target module

 * @module_size: size of the interconnect target module

 * @module_va: virtual address of the interconnect target module

 * @offsets: register offsets from module base

 * @clocks: clocks used by the interconnect target module

 * @clock_roles: clock role names for the found clocks

 * @nr_clocks: number of clocks used by the interconnect target module

 * @legacy_mode: configured for legacy mode if set

 * @cap: interconnect target module capabilities

 * @cfg: interconnect target module configuration

 * @name: name if available

 * @revision: interconnect target module revision

 * @needs_resume: runtime resume needed on resume from suspend

 */

struct sysc {

    struct device *dev;

    u64 module_pa;

    u32 module_size;

    void __iomem *module_va;

    int offsets[SYSC_MAX_REGS];

    struct clk **clocks;

    const char **clock_roles;

    int nr_clocks;

    struct reset_control *rsts;

    const char *legacy_mode;

    const struct sysc_capabilities *cap;

    struct sysc_config cfg;

    struct ti_sysc_cookie cookie;

    const char *name;

    u32 revision;

    bool enabled;

    bool needs_resume;

    bool child_needs_resume;

    struct delayed_work idle_work;

};