linux-imx

/*

 * Sonics Silicon Backplane

 * Broadcom ChipCommon core driver

 *

 * Copyright 2005, Broadcom Corporation

 * Copyright 2006, 2007, Michael Buesch <m@bues.ch>

 * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>

 *

 * Licensed under the GNU/GPL. See COPYING for details.

 */

​

#include "ssb_private.h"

​

#include <linux/ssb/ssb.h>

#include <linux/ssb/ssb_regs.h>

#include <linux/export.h>

#include <linux/pci.h>

#include <linux/bcm47xx_wdt.h>

​

​

/* Clock sources */

enum ssb_clksrc {

    /* PCI clock */

    SSB_CHIPCO_CLKSRC_PCI,

    /* Crystal slow clock oscillator */

    SSB_CHIPCO_CLKSRC_XTALOS,

    /* Low power oscillator */

    SSB_CHIPCO_CLKSRC_LOPWROS,

};

​

​

static inline u32 chipco_write32_masked(struct ssb_chipcommon *cc, u16 offset,

                    u32 mask, u32 value)

{

    value &= mask;

    value |= chipco_read32(cc, offset) & ~mask;

    chipco_write32(cc, offset, value);

​

    return value;

}

​

void ssb_chipco_set_clockmode(struct ssb_chipcommon *cc,

                  enum ssb_clkmode mode)

{

    struct ssb_device *ccdev = cc->dev;

    struct ssb_bus *bus;

    u32 tmp;

​

    if (!ccdev)

        return;

    bus = ccdev->bus;

​

    /* We support SLOW only on 6..9 */

    if (ccdev->id.revision >= 10 && mode == SSB_CLKMODE_SLOW)

        mode = SSB_CLKMODE_DYNAMIC;

​

    if (cc->capabilities & SSB_CHIPCO_CAP_PMU)

        return; /* PMU controls clockmode, separated function needed */

    WARN_ON(ccdev->id.revision >= 20);

​

    /* chipcommon cores prior to rev6 don't support dynamic clock control */

    if (ccdev->id.revision < 6)

        return;