imx_ccmvar.h revision 283500 
1/*-
2 * Copyright (c) 2014 Ian Lepore <ian@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/arm/freescale/imx/imx_ccmvar.h 283500 2015-05-24 18:59:45Z ian $
27 */
28
29#ifndef	IMX_CCMVAR_H
30#define	IMX_CCMVAR_H
31
32/*
33 * We need a clock management system that works across unrelated SoCs and
34 * devices.  For now, to keep imx development moving, define some barebones
35 * functionality that can be shared within the imx family by having each SoC
36 * implement functions with a common name.
37 *
38 * The usb enable functions are best-effort.  They turn on the usb otg, host,
39 * and phy clocks in a SoC-specific manner, but it may take a lot more than that
40 * to make usb work on a given board.  In particular, it can require specific
41 * pinmux setup of gpio pins connected to external phy parts, voltage regulators
42 * and overcurrent detectors, and so on.  On such boards, u-boot or other early
43 * board setup code has to handle those things.
44 */
45
46uint32_t imx_ccm_ipg_hz(void);
47uint32_t imx_ccm_perclk_hz(void);
48uint32_t imx_ccm_sdhci_hz(void);
49uint32_t imx_ccm_uart_hz(void);
50uint32_t imx_ccm_ahb_hz(void);
51
52void imx_ccm_usb_enable(device_t _usbdev);
53void imx_ccm_usbphy_enable(device_t _phydev);
54void imx_ccm_ssi_configure(device_t _ssidev);
55
56#endif
57