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https://gitee.com/bianbu-linux/linux-6.6
synced 2025-07-20 01:33:37 -04:00
813c2aee51
The Tosa device (Sharp SL-6000) has a mishmash driver set-up for the Toshiba TC6393xb MFD that includes a battery charger and touchscreen and has some kind of relationship to the SoC sound driver for the AC97 codec. Other devices define a chip like this but seem only half-implemented, not really handling battery charging etc. This patch switches the Toshiba MFD device to provide GPIO descriptors to the battery charger and SoC codec. As a result some descriptors need to be moved out of the Tosa boardfile and new one added: all SoC GPIO resources to these drivers now comes from the main boardfile, while the MFD provide GPIOs for its portions. As a result we can request one GPIO from our own GPIO chip and drop two hairy callbacks into the board file. This platform badly needs to have its drivers split up and converted to device tree probing to handle this quite complex relationship in an orderly manner. I just do my best in solving the GPIO descriptor part of the puzzle. Please don't ask me to fix everything that is wrong with these driver to todays standards, I am just trying to fix one aspect. I do try to use modern devres resource management and handle deferred probe using new functions where appropriate. Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Dirk Opfer <dirk@opfer-online.de> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Daniel Mack <daniel@zonque.org> Cc: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Lee Jones <lee.jones@linaro.org> Cc: Liam Girdwood <lgirdwood@gmail.com> Reviewed-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
127 lines
4.3 KiB
C
127 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_GPIO_MACHINE_H
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#define __LINUX_GPIO_MACHINE_H
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#include <linux/types.h>
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#include <linux/list.h>
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enum gpio_lookup_flags {
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GPIO_ACTIVE_HIGH = (0 << 0),
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GPIO_ACTIVE_LOW = (1 << 0),
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GPIO_OPEN_DRAIN = (1 << 1),
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GPIO_OPEN_SOURCE = (1 << 2),
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GPIO_PERSISTENT = (0 << 3),
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GPIO_TRANSITORY = (1 << 3),
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GPIO_PULL_UP = (1 << 4),
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GPIO_PULL_DOWN = (1 << 5),
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GPIO_LOOKUP_FLAGS_DEFAULT = GPIO_ACTIVE_HIGH | GPIO_PERSISTENT,
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};
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/**
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* struct gpiod_lookup - lookup table
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* @key: either the name of the chip the GPIO belongs to, or the GPIO line name
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* Note that GPIO line names are not guaranteed to be globally unique,
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* so this will use the first match found!
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* @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO, or
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* U16_MAX to indicate that @key is a GPIO line name
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* @con_id: name of the GPIO from the device's point of view
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* @idx: index of the GPIO in case several GPIOs share the same name
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* @flags: bitmask of gpio_lookup_flags GPIO_* values
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*
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* gpiod_lookup is a lookup table for associating GPIOs to specific devices and
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* functions using platform data.
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*/
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struct gpiod_lookup {
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const char *key;
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u16 chip_hwnum;
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const char *con_id;
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unsigned int idx;
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unsigned long flags;
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};
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struct gpiod_lookup_table {
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struct list_head list;
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const char *dev_id;
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struct gpiod_lookup table[];
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};
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/**
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* struct gpiod_hog - GPIO line hog table
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* @chip_label: name of the chip the GPIO belongs to
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* @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
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* @line_name: consumer name for the hogged line
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* @lflags: bitmask of gpio_lookup_flags GPIO_* values
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* @dflags: GPIO flags used to specify the direction and value
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*/
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struct gpiod_hog {
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struct list_head list;
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const char *chip_label;
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u16 chip_hwnum;
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const char *line_name;
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unsigned long lflags;
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int dflags;
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};
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/*
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* Helper for lookup tables with just one single lookup for a device.
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*/
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#define GPIO_LOOKUP_SINGLE(_name, _dev_id, _key, _chip_hwnum, _con_id, _flags) \
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static struct gpiod_lookup_table _name = { \
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.dev_id = _dev_id, \
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.table = { \
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GPIO_LOOKUP(_key, _chip_hwnum, _con_id, _flags), \
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{}, \
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}, \
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}
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/*
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* Simple definition of a single GPIO under a con_id
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*/
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#define GPIO_LOOKUP(_key, _chip_hwnum, _con_id, _flags) \
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GPIO_LOOKUP_IDX(_key, _chip_hwnum, _con_id, 0, _flags)
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/*
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* Use this macro if you need to have several GPIOs under the same con_id.
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* Each GPIO needs to use a different index and can be accessed using
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* gpiod_get_index()
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*/
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#define GPIO_LOOKUP_IDX(_key, _chip_hwnum, _con_id, _idx, _flags) \
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(struct gpiod_lookup) { \
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.key = _key, \
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.chip_hwnum = _chip_hwnum, \
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.con_id = _con_id, \
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.idx = _idx, \
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.flags = _flags, \
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}
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/*
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* Simple definition of a single GPIO hog in an array.
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*/
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#define GPIO_HOG(_chip_label, _chip_hwnum, _line_name, _lflags, _dflags) \
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(struct gpiod_hog) { \
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.chip_label = _chip_label, \
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.chip_hwnum = _chip_hwnum, \
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.line_name = _line_name, \
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.lflags = _lflags, \
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.dflags = _dflags, \
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}
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#ifdef CONFIG_GPIOLIB
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void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
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void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n);
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void gpiod_remove_lookup_table(struct gpiod_lookup_table *table);
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void gpiod_add_hogs(struct gpiod_hog *hogs);
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void gpiod_remove_hogs(struct gpiod_hog *hogs);
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#else /* ! CONFIG_GPIOLIB */
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static inline
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void gpiod_add_lookup_table(struct gpiod_lookup_table *table) {}
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static inline
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void gpiod_add_lookup_tables(struct gpiod_lookup_table **tables, size_t n) {}
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static inline
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void gpiod_remove_lookup_table(struct gpiod_lookup_table *table) {}
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static inline void gpiod_add_hogs(struct gpiod_hog *hogs) {}
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static inline void gpiod_remove_hogs(struct gpiod_hog *hogs) {}
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#endif /* CONFIG_GPIOLIB */
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#endif /* __LINUX_GPIO_MACHINE_H */
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