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