dirty fix to merging

1 files changed, 90 insertions, 0 deletions

diff --git a/include/linux/pinctrl/pinmux.h b/include/linux/pinctrl/pinmux.h
new file mode 100644
index 00000000..47e9237e
--- /dev/null
+++ b/include/linux/pinctrl/pinmux.h
@@ -0,0 +1,90 @@
+/*
+ * Interface the pinmux 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_PINCTRL_PINMUX_H
+#define __LINUX_PINCTRL_PINMUX_H
+
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include "pinctrl.h"
+
+#ifdef CONFIG_PINMUX
+
+struct pinctrl_dev;
+
+/**
+ * struct pinmux_ops - pinmux operations, to be implemented by pin controller
+ * drivers that support pinmuxing
+ * @request: called by the core to see if a certain pin can be made available
+ *	available for muxing. This is called by the core to acquire the pins
+ *	before selecting any actual mux setting across a function. The driver
+ *	is allowed to answer "no" by returning a negative error code
+ * @free: the reverse function of the request() callback, frees a pin after
+ *	being requested
+ * @list_functions: list the number of selectable named functions available
+ *	in this pinmux driver, the core will begin on 0 and call this
+ *	repeatedly as long as it returns >= 0 to enumerate mux settings
+ * @get_function_name: return the function name of the muxing selector,
+ *	called by the core to figure out which mux setting it shall map a
+ *	certain device to
+ * @get_function_groups: return an array of groups names (in turn
+ *	referencing pins) connected to a certain function selector. The group
+ *	name can be used with the generic @pinctrl_ops to retrieve the
+ *	actual pins affected. The applicable groups will be returned in
+ *	@groups and the number of groups in @num_groups
+ * @enable: enable a certain muxing function with a certain pin group. The
+ *	driver does not need to figure out whether enabling this function
+ *	conflicts some other use of the pins in that group, such collisions
+ *	are handled by the pinmux subsystem. The @func_selector selects a
+ *	certain function whereas @group_selector selects a certain set of pins
+ *	to be used. On simple controllers the latter argument may be ignored
+ * @disable: disable a certain muxing selector with a certain pin group
+ * @gpio_request_enable: requests and enables GPIO on a certain pin.
+ *	Implement this only if you can mux every pin individually as GPIO. The
+ *	affected GPIO range is passed along with an offset(pin number) into that
+ *	specific GPIO range - function selectors and pin groups are orthogonal
+ *	to this, the core will however make sure the pins do not collide.
+ * @gpio_disable_free: free up GPIO muxing on a certain pin, the reverse of
+ *	@gpio_request_enable
+ * @gpio_set_direction: Since controllers may need different configurations
+ *	depending on whether the GPIO is configured as input or output,
+ *	a direction selector function may be implemented as a backing
+ *	to the GPIO controllers that need pin muxing.
+ */
+struct pinmux_ops {
+	int (*request) (struct pinctrl_dev *pctldev, unsigned offset);
+	int (*free) (struct pinctrl_dev *pctldev, unsigned offset);
+	int (*list_functions) (struct pinctrl_dev *pctldev, unsigned selector);
+	const char *(*get_function_name) (struct pinctrl_dev *pctldev,
+					  unsigned selector);
+	int (*get_function_groups) (struct pinctrl_dev *pctldev,
+				  unsigned selector,
+				  const char * const **groups,
+				  unsigned * const num_groups);
+	int (*enable) (struct pinctrl_dev *pctldev, unsigned func_selector,
+		       unsigned group_selector);
+	void (*disable) (struct pinctrl_dev *pctldev, unsigned func_selector,
+			 unsigned group_selector);
+	int (*gpio_request_enable) (struct pinctrl_dev *pctldev,
+				    struct pinctrl_gpio_range *range,
+				    unsigned offset);
+	void (*gpio_disable_free) (struct pinctrl_dev *pctldev,
+				   struct pinctrl_gpio_range *range,
+				   unsigned offset);
+	int (*gpio_set_direction) (struct pinctrl_dev *pctldev,
+				   struct pinctrl_gpio_range *range,
+				   unsigned offset,
+				   bool input);
+};
+
+#endif /* CONFIG_PINMUX */
+
+#endif /* __LINUX_PINCTRL_PINMUX_H */