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    SubjectRe: [PATCH 1/2] drivers: create a pin control subsystem v9
    On Mon, Oct 03, 2011 at 10:17:42AM +0200, Linus Walleij wrote:
    [...]
    > diff --git a/include/linux/pinctrl/machine.h b/include/linux/pinctrl/machine.h
    > new file mode 100644
    > index 0000000..2cd4033
    > --- /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 regulator subsystem will itself
    ^^^^^^^^^
    s/regulator/pinmux?

    > + * hog the mappings as the pinmux device drivers are attched, 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_PINCTRL */

    s/!CONFIG_PINCTRL/CONFIG_PINMUX?

    > +#endif

    --
    Regards,
    Shawn



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