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-rw-r--r--arch/arm/mach-tegra/board-pinmux.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/board-pinmux.c b/arch/arm/mach-tegra/board-pinmux.c
new file mode 100644
index 00000000000..adc3efe979b
--- /dev/null
+++ b/arch/arm/mach-tegra/board-pinmux.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2011, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/string.h>
+
+#include <mach/gpio-tegra.h>
+#include <mach/pinmux.h>
+
+#include "board-pinmux.h"
+#include "devices.h"
+
+struct tegra_board_pinmux_conf *confs[2];
+
+static void tegra_board_pinmux_setup_gpios(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(confs); i++) {
+ if (!confs[i])
+ continue;
+
+ tegra_gpio_config(confs[i]->gpios, confs[i]->gpio_count);
+ }
+}
+
+static void tegra_board_pinmux_setup_pinmux(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(confs); i++) {
+ if (!confs[i])
+ continue;
+
+ tegra_pinmux_config_table(confs[i]->pgs, confs[i]->pg_count);
+
+ if (confs[i]->drives)
+ tegra_drive_pinmux_config_table(confs[i]->drives,
+ confs[i]->drive_count);
+ }
+}
+
+static int tegra_board_pinmux_bus_notify(struct notifier_block *nb,
+ unsigned long event, void *vdev)
+{
+ static bool had_gpio;
+ static bool had_pinmux;
+
+ struct device *dev = vdev;
+ const char *devname;
+
+ if (event != BUS_NOTIFY_BOUND_DRIVER)
+ return NOTIFY_DONE;
+
+ devname = dev_name(dev);
+
+ if (!had_gpio && !strcmp(devname, GPIO_DEV)) {
+ tegra_board_pinmux_setup_gpios();
+ had_gpio = true;
+ } else if (!had_pinmux && !strcmp(devname, PINMUX_DEV)) {
+ tegra_board_pinmux_setup_pinmux();
+ had_pinmux = true;
+ }
+
+ if (had_gpio && had_pinmux)
+ return NOTIFY_STOP_MASK;
+ else
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nb = {
+ .notifier_call = tegra_board_pinmux_bus_notify,
+};
+
+static struct platform_device *devices[] = {
+ &tegra_gpio_device,
+ &tegra_pinmux_device,
+};
+
+void tegra_board_pinmux_init(struct tegra_board_pinmux_conf *conf_a,
+ struct tegra_board_pinmux_conf *conf_b)
+{
+ confs[0] = conf_a;
+ confs[1] = conf_b;
+
+ bus_register_notifier(&platform_bus_type, &nb);
+
+ if (!of_machine_is_compatible("nvidia,tegra20"))
+ platform_add_devices(devices, ARRAY_SIZE(devices));
+}