linux-imx

/*

 * Driver for Silicon Labs Si514 Programmable Oscillator

 *

 * Copyright (C) 2015 Topic Embedded Products

 *

 * Author: Mike Looijmans <mike.looijmans@topic.nl>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/clk-provider.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

/* I2C registers */

#define SI514_REG_LP        0

#define SI514_REG_M_FRAC1   5

#define SI514_REG_M_FRAC2   6

#define SI514_REG_M_FRAC3   7

#define SI514_REG_M_INT_FRAC    8

#define SI514_REG_M_INT     9

#define SI514_REG_HS_DIV    10

#define SI514_REG_LS_HS_DIV 11

#define SI514_REG_OE_STATE  14

#define SI514_REG_RESET     128

#define SI514_REG_CONTROL   132

​

/* Register values */

#define SI514_RESET_RST     BIT(7)

​

#define SI514_CONTROL_FCAL  BIT(0)

#define SI514_CONTROL_OE    BIT(2)

​

#define SI514_MIN_FREQ      100000U

#define SI514_MAX_FREQ   250000000U

​

#define FXO       31980000U

​

#define FVCO_MIN    2080000000U

#define FVCO_MAX    2500000000U

​

#define HS_DIV_MAX  1022

​

struct clk_si514 {

    struct clk_hw hw;

    struct regmap *regmap;

    struct i2c_client *i2c_client;

};

#define to_clk_si514(_hw)   container_of(_hw, struct clk_si514, hw)

​

/* Multiplier/divider settings */

struct clk_si514_muldiv {