Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless

1 files changed, 107 insertions, 0 deletions

diff --git a/include/linux/pinctrl/machine.h b/include/linux/pinctrl/machine.h
new file mode 100644
index 000000000000..88863531d862
--- /dev/null
+++ b/include/linux/pinctrl/machine.h
@@ -0,0 +1,107 @@
+/*
+ * Machine interface for the pinctrl subsystem.
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ * Based on bits of regulator core, gpio core and clk core
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef __LINUX_PINMUX_MACHINE_H
+#define __LINUX_PINMUX_MACHINE_H
+
+/**
+ * struct pinmux_map - boards/machines shall provide this map for devices
+ * @name: the name of this specific map entry for the particular machine.
+ *	This is the second parameter passed to pinmux_get() when you want
+ *	to have several mappings to the same device
+ * @ctrl_dev: the pin control device to be used by this mapping, may be NULL
+ *	if you provide .ctrl_dev_name instead (this is more common)
+ * @ctrl_dev_name: the name of the device controlling this specific mapping,
+ *	the name must be the same as in your struct device*, may be NULL if
+ *	you provide .ctrl_dev instead
+ * @function: a function in the driver to use for this mapping, the driver
+ *	will lookup the function referenced by this ID on the specified
+ *	pin control device
+ * @group: sometimes a function can map to different pin groups, so this
+ *	selects a certain specific pin group to activate for the function, if
+ *	left as NULL, the first applicable group will be used
+ * @dev: the device using this specific mapping, may be NULL if you provide
+ *	.dev_name instead (this is more common)
+ * @dev_name: the name of the device using this specific mapping, the name
+ *	must be the same as in your struct device*, may be NULL if you
+ *	provide .dev instead
+ * @hog_on_boot: if this is set to true, the pin control subsystem will itself
+ *	hog the mappings as the pinmux device drivers are attached, so this is
+ *	typically used with system maps (mux mappings without an assigned
+ *	device) that you want to get hogged and enabled by default as soon as
+ *	a pinmux device supporting it is registered. These maps will not be
+ *	disabled and put until the system shuts down.
+ */
+struct pinmux_map {
+	const char *name;
+	struct device *ctrl_dev;
+	const char *ctrl_dev_name;
+	const char *function;
+	const char *group;
+	struct device *dev;
+	const char *dev_name;
+	const bool hog_on_boot;
+};
+
+/*
+ * Convenience macro to set a simple map from a certain pin controller and a
+ * certain function to a named device
+ */
+#define PINMUX_MAP(a, b, c, d) \
+	{ .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d }
+
+/*
+ * Convenience macro to map a system function onto a certain pinctrl device.
+ * System functions are not assigned to a particular device.
+ */
+#define PINMUX_MAP_SYS(a, b, c) \
+	{ .name = a, .ctrl_dev_name = b, .function = c }
+
+/*
+ * Convenience macro to map a function onto the primary device pinctrl device
+ * this is especially helpful on systems that have only one pin controller
+ * or need to set up a lot of mappings on the primary controller.
+ */
+#define PINMUX_MAP_PRIMARY(a, b, c) \
+	{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b, \
+	  .dev_name = c }
+
+/*
+ * Convenience macro to map a system function onto the primary pinctrl device.
+ * System functions are not assigned to a particular device.
+ */
+#define PINMUX_MAP_PRIMARY_SYS(a, b) \
+	{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b }
+
+/*
+ * Convenience macro to map a system function onto the primary pinctrl device,
+ * to be hogged by the pinmux core until the system shuts down.
+ */
+#define PINMUX_MAP_PRIMARY_SYS_HOG(a, b) \
+	{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b, \
+	  .hog_on_boot = true }
+
+
+#ifdef CONFIG_PINMUX
+
+extern int pinmux_register_mappings(struct pinmux_map const *map,
+				unsigned num_maps);
+
+#else
+
+static inline int pinmux_register_mappings(struct pinmux_map const *map,
+					   unsigned num_maps)
+{
+	return 0;
+}
+
+#endif /* !CONFIG_PINMUX */
+#endif