linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * R-Car PWM Timer driver

 *

 * Copyright (C) 2015 Renesas Electronics Corporation

 */

​

#include <linux/clk.h>

#include <linux/err.h>

#include <linux/io.h>

#include <linux/log2.h>

#include <linux/math64.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/pwm.h>

#include <linux/slab.h>

​

#define RCAR_PWM_MAX_DIVISION   24

#define RCAR_PWM_MAX_CYCLE  1023

​

#define RCAR_PWMCR      0x00

#define  RCAR_PWMCR_CC0_MASK    0x000f0000

#define  RCAR_PWMCR_CC0_SHIFT   16

#define  RCAR_PWMCR_CCMD    BIT(15)

#define  RCAR_PWMCR_SYNC    BIT(11)

#define  RCAR_PWMCR_SS0     BIT(4)

#define  RCAR_PWMCR_EN0     BIT(0)

​

#define RCAR_PWMCNT     0x04

#define  RCAR_PWMCNT_CYC0_MASK  0x03ff0000

#define  RCAR_PWMCNT_CYC0_SHIFT 16

#define  RCAR_PWMCNT_PH0_MASK   0x000003ff

#define  RCAR_PWMCNT_PH0_SHIFT  0

​

struct rcar_pwm_chip {

    struct pwm_chip chip;

    void __iomem *base;

    struct clk *clk;

};

​

static inline struct rcar_pwm_chip *to_rcar_pwm_chip(struct pwm_chip *chip)

{

    return container_of(chip, struct rcar_pwm_chip, chip);

}

​

static void rcar_pwm_write(struct rcar_pwm_chip *rp, u32 data,

               unsigned int offset)

{

    writel(data, rp->base + offset);

}

​

static u32 rcar_pwm_read(struct rcar_pwm_chip *rp, unsigned int offset)

{

    return readl(rp->base + offset);

}

​

static void rcar_pwm_update(struct rcar_pwm_chip *rp, u32 mask, u32 data,

                unsigned int offset)

{

    u32 value;

​