uboot-phytec

// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright 2016 Google Inc.

 */

​

#include <common.h>

#include <dm.h>

#include <errno.h>

#include <timer.h>

#include <asm/io.h>

#include <asm/arch/timer.h>

​

#define AST_TICK_TIMER  1

#define AST_TMC_RELOAD_VAL  0xffffffff

​

struct ast_timer_priv {

    struct ast_timer *regs;

    struct ast_timer_counter *tmc;

};

​

static struct ast_timer_counter *ast_get_timer_counter(struct ast_timer *timer,

                               int n)

{

    if (n > 3)

        return &timer->timers2[n - 4];

    else

        return &timer->timers1[n - 1];

}

​

static int ast_timer_probe(struct udevice *dev)

{

    struct ast_timer_priv *priv = dev_get_priv(dev);

    struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev);

​

    writel(AST_TMC_RELOAD_VAL, &priv->tmc->reload_val);

​

    /*

     * Stop the timer. This will also load reload_val into

     * the status register.

     */

    clrbits_le32(&priv->regs->ctrl1,

             AST_TMC_EN << AST_TMC_CTRL1_SHIFT(AST_TICK_TIMER));

    /* Start the timer from the fixed 1MHz clock. */

    setbits_le32(&priv->regs->ctrl1,

             (AST_TMC_EN | AST_TMC_1MHZ) <<

             AST_TMC_CTRL1_SHIFT(AST_TICK_TIMER));

​

    uc_priv->clock_rate = AST_TMC_RATE;

​

    return 0;

}

​

static int ast_timer_get_count(struct udevice *dev, u64 *count)

{

    struct ast_timer_priv *priv = dev_get_priv(dev);

​

    *count = AST_TMC_RELOAD_VAL - readl(&priv->tmc->status);

​

    return 0;

}

​

static int ast_timer_ofdata_to_platdata(struct udevice *dev)

{