linux-imx

/*

 * WM831x clock control

 *

 * Copyright 2011-2 Wolfson Microelectronics PLC.

 *

 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

 *

 *  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.

 *

 */

​

#include <linux/clk-provider.h>

#include <linux/delay.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/platform_device.h>

#include <linux/mfd/wm831x/core.h>

​

struct wm831x_clk {

    struct wm831x *wm831x;

    struct clk_hw xtal_hw;

    struct clk_hw fll_hw;

    struct clk_hw clkout_hw;

    bool xtal_ena;

};

​

static int wm831x_xtal_is_prepared(struct clk_hw *hw)

{

    struct wm831x_clk *clkdata = container_of(hw, struct wm831x_clk,

                          xtal_hw);

​

    return clkdata->xtal_ena;

}

​

static unsigned long wm831x_xtal_recalc_rate(struct clk_hw *hw,

                         unsigned long parent_rate)

{

    struct wm831x_clk *clkdata = container_of(hw, struct wm831x_clk,

                          xtal_hw);

​

    if (clkdata->xtal_ena)

        return 32768;

    else

        return 0;

}

​

static const struct clk_ops wm831x_xtal_ops = {

    .is_prepared = wm831x_xtal_is_prepared,

    .recalc_rate = wm831x_xtal_recalc_rate,

};

​

static const struct clk_init_data wm831x_xtal_init = {

    .name = "xtal",

    .ops = &wm831x_xtal_ops,

};

​

static const unsigned long wm831x_fll_auto_rates[] = {

     2048000,

    11289600,

    12000000,