FreeBSD/Linux Kernel Cross Reference
sys/arm/freescale/imx/imx_ccmvar.h

     /*-
      * Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef IMX_CCMVAR_H
    #define IMX_CCMVAR_H
    
    /*
     * We need a clock management system that works across unrelated SoCs and
     * devices.  For now, to keep imx development moving, define some barebones
     * functionality that can be shared within the imx family by having each SoC
     * implement functions with a common name.
     *
     * The usb enable functions are best-effort.  They turn on the usb otg, host,
     * and phy clocks in a SoC-specific manner, but it may take a lot more than that
     * to make usb work on a given board.  In particular, it can require specific
     * pinmux setup of gpio pins connected to external phy parts, voltage regulators
     * and overcurrent detectors, and so on.  On such boards, u-boot or other early
     * board setup code has to handle those things.
     */
    
    uint32_t imx_ccm_ecspi_hz(void);
    uint32_t imx_ccm_ipg_hz(void);
    uint32_t imx_ccm_perclk_hz(void);
    uint32_t imx_ccm_sdhci_hz(void);
    uint32_t imx_ccm_uart_hz(void);
    uint32_t imx_ccm_ahb_hz(void);
    uint32_t imx_ccm_ipu_hz(void);
    
    void imx_ccm_usb_enable(device_t _usbdev);
    void imx_ccm_usbphy_enable(device_t _phydev);
    void imx_ccm_ssi_configure(device_t _ssidev);
    int imx_ccm_pll_video_enable(void);
    void imx_ccm_hdmi_enable(void);
    void imx_ccm_ipu_enable(int ipu);
    int  imx6_ccm_sata_enable(void);
    
    /* Routines to get and set the arm clock root divisor register. */
    uint32_t imx_ccm_get_cacrr(void);
    void     imx_ccm_set_cacrr(uint32_t _divisor);
    
    #endif

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