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![Linus Torvalds](/assets/img/avatar_default.png)
- Convert to use memblock_virt_alloc in DT code which supports bootmem arches. With this we can remove the arch specific early_init_dt_alloc_memory_arch() functions. - Enable running the DT unittests on UML - Use SPDX license tags on DT files - Fix early FDT kconfig ifdef logic - Clean-up unittest Makefile - Fix function comment for of_irq_parse_raw - Add missing documentation for linux,initrd-{start,end} properties - Clean-up of binding examples using uppercase hex - Add trivial devices W83773G and Infineon TLV493D-A1B6 - Add missing STM32 SoC bindings - Various small binding doc fixes -----BEGIN PGP SIGNATURE----- iQItBAABCAAXBQJac0m3EBxyb2JoQGtlcm5lbC5vcmcACgkQ+vtdtY28YcOmXA/9 G/ZySEtV2RnW/z8bckNnG98F9M/yxFwKARYb4HPDGr4C6fYy9IO3sQ25Gjn9GgQm RzcOk40P+3YQvkb5eyha6zYYxrBwKNHjRoJJWpCpNAolJrYRgPn7gB9GLxs15mc8 F1EdSrdJDsNxxrc44T6hJ2xfU/sY5Q7E9xVAKD9pStmENUhzyLnPuyT4UrqAnCVC 1tqBjYgmHWsQxzgO9tSM629xKxgBVLPjoOULN8vWTcN+5RFQSgB/MFv611SKXo2h cIDH7Hm61MBMvblGTtEkz1pi+mF62BOvaHJdYKdAF0i1HrjIyIEysHC6rKrlYsF1 B39HY8D+kIPr39OCdn6dONDtrWkmPSc/MYfqLjFDPIwgNtgDRkv9kugEi39/LTKP htpcD9zctRQLuDJtW+1TyQvNtEHEPY2QhRjKb1SdD4xK/phMcEhc8+sW88jFygtP xlNb12FCCjw83k801oX1QHgWR8mQg0cj2hrJxrMIJ+Hrb23TvBdN+wtPc6WkKjol zqHZ9vFK4z8LIPR6jPLsz9vAIBHcXKVWgSGSf41MhTSZYTOznR7HG1wgTcq4XMld VpKdWKbRa3B/ZqP01eCHmBLIt/f0pcieoa7b20uIf2PjWQmzRkaX9A0yfWrYsV/V JQogXMCSe7zfZBxrLRx37UP7hqMEIgWeTN+Ek0a4dOI= =v6gj -----END PGP SIGNATURE----- Merge tag 'devicetree-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull DeviceTree updates from Rob Herring: - Convert to use memblock_virt_alloc in DT code which supports bootmem arches. With this we can remove the arch specific early_init_dt_alloc_memory_arch() functions. - Enable running the DT unittests on UML - Use SPDX license tags on DT files - Fix early FDT kconfig ifdef logic - Clean-up unittest Makefile - Fix function comment for of_irq_parse_raw - Add missing documentation for linux,initrd-{start,end} properties - Clean-up of binding examples using uppercase hex - Add trivial devices W83773G and Infineon TLV493D-A1B6 - Add missing STM32 SoC bindings - Various small binding doc fixes * tag 'devicetree-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (23 commits) xtensa: remove arch specific early DT functions x86: remove arch specific early_init_dt_alloc_memory_arch nios2: remove arch specific early_init_dt_alloc_memory_arch mips: remove arch specific early_init_dt_alloc_memory_arch metag: remove arch specific early DT functions cris: remove arch specific early DT functions libfdt: remove unnecessary include directive from <linux/libfdt.h> of: unittest: refactor Makefile of/fdt: use memblock_virt_alloc for early alloc of: Use SPDX license tag for DT files of/fdt: Fix #ifdef dependency of early flattree declarations dt-bindings: h8300 clocksource: correct spelling of pulse dt-bindings: imx6q-pcie: Add required property for i.MX6SX mmc: Don't reference Linux-specific OF_GPIO_ACTIVE_LOW flag in DT binding dt-bindings: Use lower case hex in unit-addresses dt-bindings: display: panel: Fix compatible string for Toshiba LT089AC29000 dt-bindings: Add Infineon TLV493D-A1B6 dt-bindings: mailbox: ti,message-manager: Fix interrupt name error dt-bindings: chosen: Document linux,initrd-{start,end} dt-bindings: arm: document supported STM32 SoC family ...
157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* OF helpers for the GPIO API
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*
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* Copyright (c) 2007-2008 MontaVista Software, Inc.
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*
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* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
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*/
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#ifndef __LINUX_OF_GPIO_H
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#define __LINUX_OF_GPIO_H
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#include <linux/compiler.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/gpio.h>
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#include <linux/of.h>
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struct device_node;
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/*
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* This is Linux-specific flags. By default controllers' and Linux' mapping
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* match, but GPIO controllers are free to translate their own flags to
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* Linux-specific in their .xlate callback. Though, 1:1 mapping is recommended.
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*/
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enum of_gpio_flags {
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OF_GPIO_ACTIVE_LOW = 0x1,
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OF_GPIO_SINGLE_ENDED = 0x2,
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OF_GPIO_OPEN_DRAIN = 0x4,
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OF_GPIO_TRANSITORY = 0x8,
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};
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#ifdef CONFIG_OF_GPIO
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/*
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* OF GPIO chip for memory mapped banks
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*/
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struct of_mm_gpio_chip {
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struct gpio_chip gc;
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void (*save_regs)(struct of_mm_gpio_chip *mm_gc);
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void __iomem *regs;
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};
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static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc)
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{
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return container_of(gc, struct of_mm_gpio_chip, gc);
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}
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extern int of_get_named_gpio_flags(struct device_node *np,
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const char *list_name, int index, enum of_gpio_flags *flags);
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extern int of_mm_gpiochip_add_data(struct device_node *np,
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struct of_mm_gpio_chip *mm_gc,
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void *data);
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static inline int of_mm_gpiochip_add(struct device_node *np,
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struct of_mm_gpio_chip *mm_gc)
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{
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return of_mm_gpiochip_add_data(np, mm_gc, NULL);
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}
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extern void of_mm_gpiochip_remove(struct of_mm_gpio_chip *mm_gc);
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extern int of_gpio_simple_xlate(struct gpio_chip *gc,
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const struct of_phandle_args *gpiospec,
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u32 *flags);
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#else /* CONFIG_OF_GPIO */
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/* Drivers may not strictly depend on the GPIO support, so let them link. */
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static inline int of_get_named_gpio_flags(struct device_node *np,
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const char *list_name, int index, enum of_gpio_flags *flags)
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{
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if (flags)
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*flags = 0;
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return -ENOSYS;
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}
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static inline int of_gpio_simple_xlate(struct gpio_chip *gc,
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const struct of_phandle_args *gpiospec,
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u32 *flags)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_OF_GPIO */
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/**
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* of_gpio_named_count() - Count GPIOs for a device
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* @np: device node to count GPIOs for
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* @propname: property name containing gpio specifier(s)
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*
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* The function returns the count of GPIOs specified for a node.
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* Note that the empty GPIO specifiers count too. Returns either
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* Number of gpios defined in property,
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* -EINVAL for an incorrectly formed gpios property, or
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* -ENOENT for a missing gpios property
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*
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* Example:
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* gpios = <0
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* &gpio1 1 2
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* 0
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* &gpio2 3 4>;
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*
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* The above example defines four GPIOs, two of which are not specified.
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* This function will return '4'
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*/
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static inline int of_gpio_named_count(struct device_node *np, const char* propname)
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{
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return of_count_phandle_with_args(np, propname, "#gpio-cells");
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}
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/**
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* of_gpio_count() - Count GPIOs for a device
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* @np: device node to count GPIOs for
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*
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* Same as of_gpio_named_count, but hard coded to use the 'gpios' property
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*/
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static inline int of_gpio_count(struct device_node *np)
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{
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return of_gpio_named_count(np, "gpios");
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}
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static inline int of_get_gpio_flags(struct device_node *np, int index,
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enum of_gpio_flags *flags)
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{
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return of_get_named_gpio_flags(np, "gpios", index, flags);
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}
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/**
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* of_get_named_gpio() - Get a GPIO number to use with GPIO API
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* @np: device node to get GPIO from
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* @propname: Name of property containing gpio specifier(s)
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* @index: index of the GPIO
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*
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* Returns GPIO number to use with Linux generic GPIO API, or one of the errno
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* value on the error condition.
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*/
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static inline int of_get_named_gpio(struct device_node *np,
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const char *propname, int index)
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{
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return of_get_named_gpio_flags(np, propname, index, NULL);
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}
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/**
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* of_get_gpio() - Get a GPIO number to use with GPIO API
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* @np: device node to get GPIO from
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* @index: index of the GPIO
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*
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* Returns GPIO number to use with Linux generic GPIO API, or one of the errno
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* value on the error condition.
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*/
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static inline int of_get_gpio(struct device_node *np, int index)
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{
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return of_get_gpio_flags(np, index, NULL);
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}
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#endif /* __LINUX_OF_GPIO_H */
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