linux-imx

/*

 * Copyright (C) 2013 Pengutronix

 * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>

 *

 * 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.

 */

#include <linux/io.h>

#include <linux/clk-provider.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/slab.h>

​

#include <dt-bindings/clock/efm32-cmu.h>

​

#define CMU_HFPERCLKEN0     0x44

#define CMU_MAX_CLKS        37

​

static struct clk_hw_onecell_data *clk_data;

​

static void __init efm32gg_cmu_init(struct device_node *np)

{

    int i;

    void __iomem *base;

    struct clk_hw **hws;

​

    clk_data = kzalloc(struct_size(clk_data, hws, CMU_MAX_CLKS),

               GFP_KERNEL);

​

    if (!clk_data)

        return;

​

    hws = clk_data->hws;

​

    for (i = 0; i < CMU_MAX_CLKS; ++i)

        hws[i] = ERR_PTR(-ENOENT);

​

    base = of_iomap(np, 0);

    if (!base) {

        pr_warn("Failed to map address range for efm32gg,cmu node\n");

        return;

    }

​

    hws[clk_HFXO] = clk_hw_register_fixed_rate(NULL, "HFXO", NULL, 0,

                           48000000);

​

    hws[clk_HFPERCLKUSART0] = clk_hw_register_gate(NULL, "HFPERCLK.USART0",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 0, 0, NULL);

    hws[clk_HFPERCLKUSART1] = clk_hw_register_gate(NULL, "HFPERCLK.USART1",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 1, 0, NULL);

    hws[clk_HFPERCLKUSART2] = clk_hw_register_gate(NULL, "HFPERCLK.USART2",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 2, 0, NULL);

    hws[clk_HFPERCLKUART0] = clk_hw_register_gate(NULL, "HFPERCLK.UART0",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 3, 0, NULL);

    hws[clk_HFPERCLKUART1] = clk_hw_register_gate(NULL, "HFPERCLK.UART1",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 4, 0, NULL);

    hws[clk_HFPERCLKTIMER0] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER0",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 5, 0, NULL);

    hws[clk_HFPERCLKTIMER1] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER1",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 6, 0, NULL);

    hws[clk_HFPERCLKTIMER2] = clk_hw_register_gate(NULL, "HFPERCLK.TIMER2",

            "HFXO", 0, base + CMU_HFPERCLKEN0, 7, 0, NULL);