2 * Copyright (c) 2011, NVIDIA CORPORATION. All rights reserved.
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include <linux/device.h>
16 #include <linux/kernel.h>
17 #include <linux/notifier.h>
19 #include <linux/string.h>
21 #include <mach/gpio-tegra.h>
22 #include <mach/pinmux.h>
24 #include "board-pinmux.h"
27 struct tegra_board_pinmux_conf *confs[2];
29 static void tegra_board_pinmux_setup_gpios(void)
33 for (i = 0; i < ARRAY_SIZE(confs); i++) {
37 tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count);
41 static void tegra_board_pinmux_setup_pinmux(void)
45 for (i = 0; i < ARRAY_SIZE(confs); i++) {
49 tegra_pinmux_config_table(confs[i]->pgs, confs[i]->pg_count);
52 tegra_drive_pinmux_config_table(confs[i]->drives,
53 confs[i]->drive_count);
57 static int tegra_board_pinmux_bus_notify(struct notifier_block *nb,
58 unsigned long event, void *vdev)
61 static bool had_pinmux;
63 struct device *dev = vdev;
66 if (event != BUS_NOTIFY_BOUND_DRIVER)
69 devname = dev_name(dev);
71 if (!had_gpio && !strcmp(devname, GPIO_DEV)) {
72 tegra_board_pinmux_setup_gpios();
74 } else if (!had_pinmux && !strcmp(devname, PINMUX_DEV)) {
75 tegra_board_pinmux_setup_pinmux();
79 if (had_gpio && had_pinmux)
80 return NOTIFY_STOP_MASK;
85 static struct notifier_block nb = {
86 .notifier_call = tegra_board_pinmux_bus_notify,
89 static struct platform_device *devices[] = {
94 void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
95 struct tegra_board_pinmux_conf *conf_b)
100 bus_register_notifier(&platform_bus_type, &nb);
102 if (!of_machine_is_compatible("nvidia,tegra20"))
103 platform_add_devices(devices, ARRAY_SIZE(devices));