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104 lines
2.4 KiB
104 lines
2.4 KiB
/*
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* Copyright (c) 2011, NVIDIA CORPORATION. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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#include <linux/of.h>
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#include <linux/string.h>
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#include <mach/gpio-tegra.h>
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#include <mach/pinmux.h>
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#include "board-pinmux.h"
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#include "devices.h"
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struct tegra_board_pinmux_conf *confs[2];
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static void tegra_board_pinmux_setup_gpios(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(confs); i++) {
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if (!confs[i])
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continue;
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tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count);
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}
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}
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static void tegra_board_pinmux_setup_pinmux(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(confs); i++) {
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if (!confs[i])
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continue;
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tegra_pinmux_config_table(confs[i]->pgs, confs[i]->pg_count);
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if (confs[i]->drives)
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tegra_drive_pinmux_config_table(confs[i]->drives,
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confs[i]->drive_count);
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}
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}
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static int tegra_board_pinmux_bus_notify(struct notifier_block *nb,
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unsigned long event, void *vdev)
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{
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static bool had_gpio;
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static bool had_pinmux;
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struct device *dev = vdev;
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const char *devname;
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if (event != BUS_NOTIFY_BOUND_DRIVER)
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return NOTIFY_DONE;
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devname = dev_name(dev);
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if (!had_gpio && !strcmp(devname, GPIO_DEV)) {
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tegra_board_pinmux_setup_gpios();
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had_gpio = true;
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} else if (!had_pinmux && !strcmp(devname, PINMUX_DEV)) {
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tegra_board_pinmux_setup_pinmux();
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had_pinmux = true;
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}
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if (had_gpio && had_pinmux)
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return NOTIFY_STOP_MASK;
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else
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return NOTIFY_DONE;
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}
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static struct notifier_block nb = {
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.notifier_call = tegra_board_pinmux_bus_notify,
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};
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static struct platform_device *devices[] = {
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&tegra_gpio_device,
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&tegra_pinmux_device,
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};
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void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
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struct tegra_board_pinmux_conf *conf_b)
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{
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confs[0] = conf_a;
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confs[1] = conf_b;
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bus_register_notifier(&platform_bus_type, &nb);
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if (!of_machine_is_compatible("nvidia,tegra20"))
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platform_add_devices(devices, ARRAY_SIZE(devices));
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}
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