linux-imx

/*

 * omap-ocp2scp.c - transform ocp interface protocol to scp protocol

 *

 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * Author: Kishon Vijay Abraham I <kishon@ti.com>

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */

​

#include <linux/io.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/err.h>

#include <linux/pm_runtime.h>

#include <linux/of.h>

#include <linux/of_platform.h>

​

#define OCP2SCP_TIMING 0x18

#define SYNC2_MASK 0xf

​

static int ocp2scp_remove_devices(struct device *dev, void *c)

{

    struct platform_device *pdev = to_platform_device(dev);

​

    platform_device_unregister(pdev);

​

    return 0;

}

​

static int omap_ocp2scp_probe(struct platform_device *pdev)

{

    int ret;

    u32 reg;

    void __iomem *regs;

    struct resource *res;

    struct device_node *np = pdev->dev.of_node;

​

    if (np) {

        ret = of_platform_populate(np, NULL, NULL, &pdev->dev);

        if (ret) {

            dev_err(&pdev->dev,

                "failed to add resources for ocp2scp child\n");

            goto err0;

        }

    }

​

    pm_runtime_enable(&pdev->dev);

    /*

     * As per AM572x TRM: http://www.ti.com/lit/ug/spruhz6/spruhz6.pdf

     * under section 26.3.2.2, table 26-26 OCP2SCP TIMING Caution;

     * As per OMAP4430 TRM: http://www.ti.com/lit/ug/swpu231ap/swpu231ap.pdf

     * under section 23.12.6.2.2 , Table 23-1213 OCP2SCP TIMING Caution;

     * As per OMAP4460 TRM: http://www.ti.com/lit/ug/swpu235ab/swpu235ab.pdf

     * under section 23.12.6.2.2, Table 23-1213 OCP2SCP TIMING Caution;