7e42e7fed0
Slave devices can be added by listing them as child of a SLIMBUS controller of_node in the Device Tree. It is required to specify elemental address, and name of the slave device. Change-Id: Ie1b2f8fe58988f0237547a84f1bbb14ce4733eff Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* Copyright (c) 2012, Code Aurora Forum. 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;
|
|
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);
|
|
|
|
binfo = krealloc(binfo, (n + 1) * sizeof(struct slim_boardinfo),
|
|
GFP_KERNEL);
|
|
if (!binfo) {
|
|
dev_err(&ctrl->dev, "out of memory");
|
|
kfree(name);
|
|
kfree(slim);
|
|
return -ENOMEM;
|
|
}
|
|
slim->name = (const char *)name;
|
|
binfo[n].bus_num = ctrl->nr;
|
|
binfo[n].slim_slave = slim;
|
|
n++;
|
|
}
|
|
return slim_register_board_info(binfo, n);
|
|
of_slim_err:
|
|
n--;
|
|
while (n >= 0) {
|
|
kfree(binfo[n].slim_slave->name);
|
|
kfree(binfo[n].slim_slave);
|
|
}
|
|
kfree(binfo);
|
|
return ret;
|
|
}
|