2 * Copyright (C) 2006 Atmel Corporation
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include <asm/arch/platform.h>
32 static struct device_state device_state[NR_DEVICES];
34 static int claim_resource(const struct resource *res)
40 ret = gpio_set_func(res->u.gpio.gpio_dev,
46 ret = pm_enable_clock(res->u.clock.id, res->u.clock.index);
53 static void free_resource(const struct resource *res)
57 gpio_free(res->u.gpio.gpio_dev, res->u.gpio.start,
61 pm_disable_clock(res->u.clock.id, res->u.clock.index);
66 static int init_dev(const struct device *dev)
71 for (i = 0; i < dev->nr_resources; i++) {
72 ret = claim_resource(&dev->resource[i]);
81 free_resource(&dev->resource[i]);
86 const struct device *get_device(enum device_id devid)
88 struct device_state *devstate;
89 const struct device *dev;
94 devstate = &device_state[devid];
95 dev = &chip_device[devid];
97 flags = disable_interrupts();
98 if (devstate->refcount++)
106 return ret ? NULL : dev;
109 void put_device(const struct device *dev)
111 struct device_state *devstate;
112 unsigned long devid, flags;
114 devid = (unsigned long)(dev - chip_device) / sizeof(struct device);
115 devstate = &device_state[devid];
117 flags = disable_interrupts();
121 for (i = 0; i < dev->nr_resources; i++)
122 free_resource(&dev->resource[i]);