linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * CS2000  --  CIRRUS LOGIC Fractional-N Clock Synthesizer & Clock Multiplier

 *

 * Copyright (C) 2015 Renesas Electronics Corporation

 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

 */

#include <linux/clk-provider.h>

#include <linux/delay.h>

#include <linux/clk.h>

#include <linux/i2c.h>

#include <linux/of_device.h>

#include <linux/module.h>

​

#define CH_MAX 4

#define RATIO_REG_SIZE 4

​

#define DEVICE_ID   0x1

#define DEVICE_CTRL 0x2

#define DEVICE_CFG1 0x3

#define DEVICE_CFG2 0x4

#define GLOBAL_CFG  0x5

#define Ratio_Add(x, nth)   (6 + (x * 4) + (nth))

#define Ratio_Val(x, nth)   ((x >> (24 - (8 * nth))) & 0xFF)

#define Val_Ratio(x, nth)   ((x & 0xFF) << (24 - (8 * nth)))

#define FUNC_CFG1   0x16

#define FUNC_CFG2   0x17

​

/* DEVICE_ID */

#define REVISION_MASK   (0x7)

#define REVISION_B2_B3  (0x4)

#define REVISION_C1 (0x6)

​

/* DEVICE_CTRL */

#define PLL_UNLOCK  (1 << 7)

#define AUXOUTDIS   (1 << 1)

#define CLKOUTDIS   (1 << 0)

​

/* DEVICE_CFG1 */

#define RSEL(x)     (((x) & 0x3) << 3)

#define RSEL_MASK   RSEL(0x3)

#define ENDEV1      (0x1)

​

/* DEVICE_CFG2 */

#define AUTORMOD    (1 << 3)

#define LOCKCLK(x)  (((x) & 0x3) << 1)

#define LOCKCLK_MASK    LOCKCLK(0x3)

#define FRACNSRC_MASK   (1 << 0)

#define FRACNSRC_STATIC     (0 << 0)

#define FRACNSRC_DYNAMIC    (1 << 1)

​

/* GLOBAL_CFG */

#define ENDEV2      (0x1)

​

/* FUNC_CFG1 */

#define CLKSKIPEN   (1 << 7)

#define REFCLKDIV(x)    (((x) & 0x3) << 3)

#define REFCLKDIV_MASK  REFCLKDIV(0x3)

​

/* FUNC_CFG2 */

#define LFRATIO_MASK    (1 << 3)

#define LFRATIO_20_12   (0 << 3)

#define LFRATIO_12_20   (1 << 3)

​

#define CH_SIZE_ERR(ch)     ((ch < 0) || (ch >= CH_MAX))

#define hw_to_priv(_hw)     container_of(_hw, struct cs2000_priv, hw)

#define priv_to_client(priv)    (priv->client)

#define priv_to_dev(priv)   (&(priv_to_client(priv)->dev))

​

#define CLK_IN  0

#define REF_CLK 1

#define CLK_MAX 2

​

struct cs2000_priv {

    struct clk_hw hw;

    struct i2c_client *client;

    struct clk *clk_in;

    struct clk *ref_clk;

​

    /* suspend/resume */

    unsigned long saved_rate;

    unsigned long saved_parent_rate;

};

​

static const struct of_device_id cs2000_of_match[] = {

    { .compatible = "cirrus,cs2000-cp", },

    {},

};

MODULE_DEVICE_TABLE(of, cs2000_of_match);

​

static const struct i2c_device_id cs2000_id[] = {

    { "cs2000-cp", },