net: rfkill: add generic gpio rfkill driver

This adds a new generic gpio rfkill driver to support rfkill switches
which are controlled by gpios. The driver also supports passing in
data about the clock for the radio, so that when rfkill is blocking,
it can disable the clock.

This driver assumes platform data is passed from the board files to
configure it for specific devices.

Original-patch-by: Anantha Idapalapati <aidapalapati@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/linux/rfkill-gpio.h b/include/linux/rfkill-gpio.h
new file mode 100644
index 000000000000..a175d0598033
--- /dev/null
+++ b/include/linux/rfkill-gpio.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2011, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+
+#ifndef __RFKILL_GPIO_H
+#define __RFKILL_GPIO_H
+
+#include <linux/types.h>
+#include <linux/rfkill.h>
+
+/**
+ * struct rfkill_gpio_platform_data - platform data for rfkill gpio device.
+ * for unused gpio's, the expected value is -1.
+ * @name:               name for the gpio rf kill instance
+ * @reset_gpio:         GPIO which is used for reseting rfkill switch
+ * @shutdown_gpio:      GPIO which is used for shutdown of rfkill switch
+ * @power_clk_name:     [optional] name of clk to turn off while blocked
+ */
+
+struct rfkill_gpio_platform_data {
+        char                    *name;
+        int                     reset_gpio;
+        int                     shutdown_gpio;
+        const char              *power_clk_name;
+        enum rfkill_type        type;
+};
+
+#endif /* __RFKILL_GPIO_H */