91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
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/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
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*
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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 version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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/* OF helpers for SLIMbus */
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#include <linux/slimbus/slimbus.h>
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#include <linux/irq.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/of_slimbus.h>
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int of_register_slim_devices(struct slim_controller *ctrl)
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{
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struct device_node *node;
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struct slim_boardinfo *binfo = NULL;
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struct slim_boardinfo *temp;
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int n = 0;
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int ret = 0;
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if (!ctrl->dev.of_node)
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return -EINVAL;
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for_each_child_of_node(ctrl->dev.of_node, node) {
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struct property *prop;
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struct slim_device *slim;
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char *name;
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prop = of_find_property(node, "elemental-addr", NULL);
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if (!prop || prop->length != 6) {
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dev_err(&ctrl->dev, "of_slim: invalid E-addr");
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continue;
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}
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name = kzalloc(SLIMBUS_NAME_SIZE, GFP_KERNEL);
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if (!name) {
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dev_err(&ctrl->dev, "of_slim: out of memory");
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ret = -ENOMEM;
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goto of_slim_err;
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}
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if (of_modalias_node(node, name, SLIMBUS_NAME_SIZE) < 0) {
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dev_err(&ctrl->dev, "of_slim: modalias failure on %s\n",
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node->full_name);
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kfree(name);
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continue;
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}
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slim = kzalloc(sizeof(struct slim_device), GFP_KERNEL);
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if (!slim) {
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dev_err(&ctrl->dev, "of_slim: out of memory");
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ret = -ENOMEM;
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kfree(name);
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goto of_slim_err;
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}
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memcpy(slim->e_addr, prop->value, 6);
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temp = krealloc(binfo, (n + 1) * sizeof(struct slim_boardinfo),
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GFP_KERNEL);
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if (!temp) {
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dev_err(&ctrl->dev, "out of memory");
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kfree(name);
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kfree(slim);
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ret = -ENOMEM;
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goto of_slim_err;
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}
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binfo = temp;
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slim->dev.of_node = of_node_get(node);
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slim->name = (const char *)name;
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binfo[n].bus_num = ctrl->nr;
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binfo[n].slim_slave = slim;
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n++;
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}
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ret = slim_register_board_info(binfo, n);
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if (!ret)
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goto of_slim_ret;
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of_slim_err:
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while (n-- > 0) {
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kfree(binfo[n].slim_slave->name);
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kfree(binfo[n].slim_slave);
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}
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of_slim_ret:
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kfree(binfo);
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return ret;
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}
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