0133370f93
ocp2scp was not having pdata support which makes *musb* fail for non-dt
boot in OMAP platform. The pdata will have information about the devices
that is connected to ocp2scp. ocp2scp driver will now make use of this
information to create the devices that is attached to ocp2scp.
This is needed to fix MUSB regression caused by commit c9e4412a
(arm: omap: phy: remove unused functions from omap-phy-internal.c)
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
[tony@atomide.com: updated comments for regression info]
Signed-off-by: Tony Lindgren <tony@atomide.com>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
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* omap-ocp2scp.c - transform ocp interface protocol to scp protocol
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* Author: Kishon Vijay Abraham I <kishon@ti.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/pm_runtime.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_data/omap_ocp2scp.h>
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/**
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* _count_resources - count for the number of resources
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* @res: struct resource *
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*
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* Count and return the number of resources populated for the device that is
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* connected to ocp2scp.
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*/
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static unsigned _count_resources(struct resource *res)
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{
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int cnt = 0;
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while (res->start != res->end) {
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cnt++;
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res++;
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}
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return cnt;
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}
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static int ocp2scp_remove_devices(struct device *dev, void *c)
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{
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struct platform_device *pdev = to_platform_device(dev);
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platform_device_unregister(pdev);
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return 0;
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}
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static int __devinit omap_ocp2scp_probe(struct platform_device *pdev)
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{
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int ret;
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unsigned res_cnt, i;
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struct device_node *np = pdev->dev.of_node;
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struct platform_device *pdev_child;
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struct omap_ocp2scp_platform_data *pdata = pdev->dev.platform_data;
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struct omap_ocp2scp_dev *dev;
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if (np) {
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ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
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if (ret) {
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dev_err(&pdev->dev,
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"failed to add resources for ocp2scp child\n");
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goto err0;
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}
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} else if (pdata) {
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for (i = 0, dev = *pdata->devices; i < pdata->dev_cnt; i++,
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dev++) {
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res_cnt = _count_resources(dev->res);
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pdev_child = platform_device_alloc(dev->drv_name,
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PLATFORM_DEVID_AUTO);
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if (!pdev_child) {
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dev_err(&pdev->dev,
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"failed to allocate mem for ocp2scp child\n");
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goto err0;
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}
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ret = platform_device_add_resources(pdev_child,
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dev->res, res_cnt);
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if (ret) {
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dev_err(&pdev->dev,
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"failed to add resources for ocp2scp child\n");
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goto err1;
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}
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pdev_child->dev.parent = &pdev->dev;
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ret = platform_device_add(pdev_child);
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if (ret) {
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dev_err(&pdev->dev,
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"failed to register ocp2scp child device\n");
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goto err1;
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}
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}
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} else {
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dev_err(&pdev->dev, "OCP2SCP initialized without plat data\n");
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return -EINVAL;
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}
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pm_runtime_enable(&pdev->dev);
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return 0;
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err1:
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platform_device_put(pdev_child);
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err0:
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device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
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return ret;
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}
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static int __devexit omap_ocp2scp_remove(struct platform_device *pdev)
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{
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pm_runtime_disable(&pdev->dev);
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device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id omap_ocp2scp_id_table[] = {
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{ .compatible = "ti,omap-ocp2scp" },
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{}
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};
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MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
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#endif
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static struct platform_driver omap_ocp2scp_driver = {
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.probe = omap_ocp2scp_probe,
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.remove = __devexit_p(omap_ocp2scp_remove),
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.driver = {
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.name = "omap-ocp2scp",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
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},
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};
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module_platform_driver(omap_ocp2scp_driver);
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MODULE_ALIAS("platform: omap-ocp2scp");
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MODULE_AUTHOR("Texas Instruments Inc.");
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MODULE_DESCRIPTION("OMAP OCP2SCP driver");
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MODULE_LICENSE("GPL v2");
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