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![Linus Torvalds](/assets/img/avatar_default.png)
This contains the new HTE subsystem that has been in the works for a couple of months now. The infrastructure provided allows for drivers to register as hardware timestamp providers, while consumers will be able to request events that they are interested in (such as GPIOs and IRQs) to be timestamped by the hardware providers. Note that this currently supports only one provider, but there seems to be enough interest in this functionality and we expect to see more drivers added once this is merged. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEiOrDCAFJzPfAjcif3SOs138+s6EFAmKZ77ATHHRyZWRpbmdA bnZpZGlhLmNvbQAKCRDdI6zXfz6zoTgVD/4tdJptbwblr8CCP5jklb81quuKBFu4 2VaUpyGo4TDD4g0jchmAkmB0JsjO7mauURZ/vwWUfDx+uvsOJyf79smY/4OvL0v6 MdYFeXb1rqDX8SiZSnpa+PKNI96l9/l1sbkbj1PPIod8hJSgXsASRP4lF21U97ZY QTI7u3kMJsUEvZhbEs9E2TXPAUO4+M8HfogJuEoaVRyHdwVHY1+Z+jlUsVXRd1qU XpIaKKMWF07FWrs2QUAbdqIUc8cITlcP+ExCc35PMwZnemWHnVwvk0mVyC0XD39P PHGlQOR2zTwJmijCwFkKTwuhGufE6bbvKvdns6gyTUlbzpQ4vcjPfVubt9ehX3dp acEJp5WdJFUhFU4dhjsLGVVzwE/L7vsZ3RPPh1j/Hjt0wYPg/EYPLr/wz+0wbIxt z4AtQZBLwrXSxXUuGkzl139kx0lTEtQZvfiziwi8BWrl6aqeBcGSNYHFLs2rDUTh sap+aEYRQ4cGWYfLMhv3yRLkkTlGxDMmEPM9VWGJb96osBcfidvgT+SE5qwoz6yg yJyMWwCrjYvYl+ZHwfKE3pEE4z9mrs7VLgcW9yWOF4UwFLuH0DyIEtCx/I4Uk+QG 7F1HuV3mYZNlOwgJMZooSJ5Z9uzrn+eGzivhw4klJibFZBXqICCQjL5KvQ8wyuY7 60Ns9+912HV/tQ== =sOJn -----END PGP SIGNATURE----- Merge tag 'hte/for-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux Pull hardware timestamping subsystem from Thierry Reding: "This contains the new HTE (hardware timestamping engine) subsystem that has been in the works for a couple of months now. The infrastructure provided allows for drivers to register as hardware timestamp providers, while consumers will be able to request events that they are interested in (such as GPIOs and IRQs) to be timestamped by the hardware providers. Note that this currently supports only one provider, but there seems to be enough interest in this functionality and we expect to see more drivers added once this is merged" [ Linus Walleij mentions the Intel PMC in the Elkhart and Tiger Lake platforms as another future timestamp provider ] * tag 'hte/for-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux: dt-bindings: timestamp: Correct id path dt-bindings: Renamed hte directory to timestamp hte: Uninitialized variable in hte_ts_get() hte: Fix off by one in hte_push_ts_ns() hte: Fix possible use-after-free in tegra_hte_test_remove() hte: Remove unused including <linux/version.h> MAINTAINERS: Add HTE Subsystem hte: Add Tegra HTE test driver tools: gpio: Add new hardware clock type gpiolib: cdev: Add hardware timestamp clock type gpio: tegra186: Add HTE support gpiolib: Add HTE support dt-bindings: Add HTE bindings hte: Add Tegra194 HTE kernel provider drivers: Add hardware timestamp engine (HTE) subsystem Documentation: Add HTE subsystem guide
756 lines
21 KiB
C
756 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LINUX_GPIO_CONSUMER_H
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#define __LINUX_GPIO_CONSUMER_H
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#include <linux/bits.h>
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#include <linux/bug.h>
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#include <linux/compiler_types.h>
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#include <linux/err.h>
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struct device;
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struct gpio_desc;
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struct gpio_array;
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/**
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* struct gpio_descs - Struct containing an array of descriptors that can be
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* obtained using gpiod_get_array()
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*
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* @info: Pointer to the opaque gpio_array structure
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* @ndescs: Number of held descriptors
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* @desc: Array of pointers to GPIO descriptors
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*/
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struct gpio_descs {
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struct gpio_array *info;
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unsigned int ndescs;
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struct gpio_desc *desc[];
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};
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#define GPIOD_FLAGS_BIT_DIR_SET BIT(0)
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#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1)
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#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2)
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#define GPIOD_FLAGS_BIT_OPEN_DRAIN BIT(3)
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#define GPIOD_FLAGS_BIT_NONEXCLUSIVE BIT(4)
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/**
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* enum gpiod_flags - Optional flags that can be passed to one of gpiod_* to
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* configure direction and output value. These values
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* cannot be OR'd.
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*
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* @GPIOD_ASIS: Don't change anything
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* @GPIOD_IN: Set lines to input mode
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* @GPIOD_OUT_LOW: Set lines to output and drive them low
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* @GPIOD_OUT_HIGH: Set lines to output and drive them high
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* @GPIOD_OUT_LOW_OPEN_DRAIN: Set lines to open-drain output and drive them low
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* @GPIOD_OUT_HIGH_OPEN_DRAIN: Set lines to open-drain output and drive them high
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*/
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enum gpiod_flags {
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GPIOD_ASIS = 0,
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GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET,
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GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
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GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
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GPIOD_FLAGS_BIT_DIR_VAL,
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GPIOD_OUT_LOW_OPEN_DRAIN = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_OPEN_DRAIN,
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GPIOD_OUT_HIGH_OPEN_DRAIN = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_OPEN_DRAIN,
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};
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#ifdef CONFIG_GPIOLIB
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/* Return the number of GPIOs associated with a device / function */
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int gpiod_count(struct device *dev, const char *con_id);
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/* Acquire and dispose GPIOs */
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struct gpio_desc *__must_check gpiod_get(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
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const char *con_id,
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unsigned int idx,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
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const char *con_id,
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unsigned int index,
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enum gpiod_flags flags);
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struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_descs *__must_check gpiod_get_array_optional(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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void gpiod_put(struct gpio_desc *desc);
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void gpiod_put_array(struct gpio_descs *descs);
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struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
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const char *con_id,
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unsigned int idx,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_desc *__must_check
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devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
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unsigned int index, enum gpiod_flags flags);
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struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags);
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struct gpio_descs *__must_check
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devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
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enum gpiod_flags flags);
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void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
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void devm_gpiod_unhinge(struct device *dev, struct gpio_desc *desc);
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void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs);
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int gpiod_get_direction(struct gpio_desc *desc);
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int gpiod_direction_input(struct gpio_desc *desc);
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int gpiod_direction_output(struct gpio_desc *desc, int value);
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int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
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int gpiod_enable_hw_timestamp_ns(struct gpio_desc *desc, unsigned long flags);
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int gpiod_disable_hw_timestamp_ns(struct gpio_desc *desc, unsigned long flags);
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/* Value get/set from non-sleeping context */
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int gpiod_get_value(const struct gpio_desc *desc);
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int gpiod_get_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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void gpiod_set_value(struct gpio_desc *desc, int value);
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int gpiod_set_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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int gpiod_get_raw_value(const struct gpio_desc *desc);
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int gpiod_get_raw_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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void gpiod_set_raw_value(struct gpio_desc *desc, int value);
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int gpiod_set_raw_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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/* Value get/set from sleeping context */
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int gpiod_get_value_cansleep(const struct gpio_desc *desc);
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int gpiod_get_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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void gpiod_set_value_cansleep(struct gpio_desc *desc, int value);
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int gpiod_set_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc);
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int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value);
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int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap);
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int gpiod_set_config(struct gpio_desc *desc, unsigned long config);
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int gpiod_set_debounce(struct gpio_desc *desc, unsigned int debounce);
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int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
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void gpiod_toggle_active_low(struct gpio_desc *desc);
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int gpiod_is_active_low(const struct gpio_desc *desc);
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int gpiod_cansleep(const struct gpio_desc *desc);
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int gpiod_to_irq(const struct gpio_desc *desc);
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int gpiod_set_consumer_name(struct gpio_desc *desc, const char *name);
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/* Convert between the old gpio_ and new gpiod_ interfaces */
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struct gpio_desc *gpio_to_desc(unsigned gpio);
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int desc_to_gpio(const struct gpio_desc *desc);
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/* Child properties interface */
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struct fwnode_handle;
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struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
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const char *propname, int index,
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enum gpiod_flags dflags,
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const char *label);
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struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,
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const char *con_id, int index,
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enum gpiod_flags flags,
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const char *label);
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struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev,
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struct fwnode_handle *child,
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const char *con_id, int index,
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enum gpiod_flags flags,
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const char *label);
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#else /* CONFIG_GPIOLIB */
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#include <linux/kernel.h>
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static inline int gpiod_count(struct device *dev, const char *con_id)
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{
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return 0;
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}
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static inline struct gpio_desc *__must_check gpiod_get(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct gpio_desc *__must_check
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gpiod_get_index(struct device *dev,
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const char *con_id,
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unsigned int idx,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct gpio_desc *__must_check
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gpiod_get_optional(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline struct gpio_desc *__must_check
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gpiod_get_index_optional(struct device *dev, const char *con_id,
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unsigned int index, enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline struct gpio_descs *__must_check
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gpiod_get_array(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct gpio_descs *__must_check
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gpiod_get_array_optional(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline void gpiod_put(struct gpio_desc *desc)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(desc);
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}
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static inline void devm_gpiod_unhinge(struct device *dev,
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struct gpio_desc *desc)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(desc);
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}
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static inline void gpiod_put_array(struct gpio_descs *descs)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(descs);
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}
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static inline struct gpio_desc *__must_check
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devm_gpiod_get(struct device *dev,
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const char *con_id,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline
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struct gpio_desc *__must_check
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devm_gpiod_get_index(struct device *dev,
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const char *con_id,
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unsigned int idx,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct gpio_desc *__must_check
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devm_gpiod_get_optional(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline struct gpio_desc *__must_check
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devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
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unsigned int index, enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline struct gpio_descs *__must_check
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devm_gpiod_get_array(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline struct gpio_descs *__must_check
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devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
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enum gpiod_flags flags)
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{
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return NULL;
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}
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static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(desc);
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}
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static inline void devm_gpiod_put_array(struct device *dev,
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struct gpio_descs *descs)
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{
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might_sleep();
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/* GPIO can never have been requested */
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WARN_ON(descs);
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}
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static inline int gpiod_get_direction(const struct gpio_desc *desc)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_direction_input(struct gpio_desc *desc)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_direction_output(struct gpio_desc *desc, int value)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_enable_hw_timestamp_ns(struct gpio_desc *desc,
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unsigned long flags)
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{
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_disable_hw_timestamp_ns(struct gpio_desc *desc,
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unsigned long flags)
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{
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WARN_ON(desc);
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return -ENOSYS;
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}
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static inline int gpiod_get_value(const struct gpio_desc *desc)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return 0;
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}
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static inline int gpiod_get_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc_array);
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return 0;
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}
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static inline void gpiod_set_value(struct gpio_desc *desc, int value)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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}
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static inline int gpiod_set_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc_array);
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return 0;
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}
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static inline int gpiod_get_raw_value(const struct gpio_desc *desc)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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return 0;
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}
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static inline int gpiod_get_raw_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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struct gpio_array *array_info,
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unsigned long *value_bitmap)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc_array);
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return 0;
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}
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static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value)
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{
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/* GPIO can never have been requested */
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WARN_ON(desc);
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}
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static inline int gpiod_set_raw_array_value(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
struct gpio_array *array_info,
|
|
unsigned long *value_bitmap)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc_array);
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return 0;
|
|
}
|
|
static inline int gpiod_get_array_value_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
struct gpio_array *array_info,
|
|
unsigned long *value_bitmap)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc_array);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
}
|
|
static inline int gpiod_set_array_value_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
struct gpio_array *array_info,
|
|
unsigned long *value_bitmap)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc_array);
|
|
return 0;
|
|
}
|
|
static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return 0;
|
|
}
|
|
static inline int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
struct gpio_array *array_info,
|
|
unsigned long *value_bitmap)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc_array);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc,
|
|
int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
}
|
|
static inline int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
struct gpio_array *array_info,
|
|
unsigned long *value_bitmap)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc_array);
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpiod_set_config(struct gpio_desc *desc, unsigned long config)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_set_debounce(struct gpio_desc *desc, unsigned int debounce)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_set_transitory(struct gpio_desc *desc, bool transitory)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline void gpiod_toggle_active_low(struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
}
|
|
|
|
static inline int gpiod_is_active_low(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return 0;
|
|
}
|
|
static inline int gpiod_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpiod_to_irq(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int gpiod_set_consumer_name(struct gpio_desc *desc,
|
|
const char *name)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct gpio_desc *gpio_to_desc(unsigned gpio)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int desc_to_gpio(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(desc);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Child properties interface */
|
|
struct fwnode_handle;
|
|
|
|
static inline
|
|
struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
|
|
const char *propname, int index,
|
|
enum gpiod_flags dflags,
|
|
const char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline
|
|
struct gpio_desc *fwnode_gpiod_get_index(struct fwnode_handle *fwnode,
|
|
const char *con_id, int index,
|
|
enum gpiod_flags flags,
|
|
const char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline
|
|
struct gpio_desc *devm_fwnode_gpiod_get_index(struct device *dev,
|
|
struct fwnode_handle *fwnode,
|
|
const char *con_id, int index,
|
|
enum gpiod_flags flags,
|
|
const char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB */
|
|
|
|
static inline
|
|
struct gpio_desc *devm_fwnode_gpiod_get(struct device *dev,
|
|
struct fwnode_handle *fwnode,
|
|
const char *con_id,
|
|
enum gpiod_flags flags,
|
|
const char *label)
|
|
{
|
|
return devm_fwnode_gpiod_get_index(dev, fwnode, con_id, 0,
|
|
flags, label);
|
|
}
|
|
|
|
static inline
|
|
struct gpio_desc *devm_fwnode_get_index_gpiod_from_child(struct device *dev,
|
|
const char *con_id, int index,
|
|
struct fwnode_handle *child,
|
|
enum gpiod_flags flags,
|
|
const char *label)
|
|
{
|
|
return devm_fwnode_gpiod_get_index(dev, child, con_id, index,
|
|
flags, label);
|
|
}
|
|
|
|
static inline
|
|
struct gpio_desc *devm_fwnode_get_gpiod_from_child(struct device *dev,
|
|
const char *con_id,
|
|
struct fwnode_handle *child,
|
|
enum gpiod_flags flags,
|
|
const char *label)
|
|
{
|
|
return devm_fwnode_gpiod_get_index(dev, child, con_id, 0, flags, label);
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_OF_GPIO)
|
|
struct device_node;
|
|
|
|
struct gpio_desc *gpiod_get_from_of_node(const struct device_node *node,
|
|
const char *propname, int index,
|
|
enum gpiod_flags dflags,
|
|
const char *label);
|
|
|
|
#else /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */
|
|
|
|
struct device_node;
|
|
|
|
static inline
|
|
struct gpio_desc *gpiod_get_from_of_node(const struct device_node *node,
|
|
const char *propname, int index,
|
|
enum gpiod_flags dflags,
|
|
const char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB && CONFIG_OF_GPIO */
|
|
|
|
#ifdef CONFIG_GPIOLIB
|
|
struct device_node;
|
|
|
|
struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
|
|
const struct device_node *node,
|
|
const char *propname, int index,
|
|
enum gpiod_flags dflags,
|
|
const char *label);
|
|
|
|
#else /* CONFIG_GPIOLIB */
|
|
|
|
struct device_node;
|
|
|
|
static inline
|
|
struct gpio_desc *devm_gpiod_get_from_of_node(struct device *dev,
|
|
const struct device_node *node,
|
|
const char *propname, int index,
|
|
enum gpiod_flags dflags,
|
|
const char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB */
|
|
|
|
struct acpi_gpio_params {
|
|
unsigned int crs_entry_index;
|
|
unsigned int line_index;
|
|
bool active_low;
|
|
};
|
|
|
|
struct acpi_gpio_mapping {
|
|
const char *name;
|
|
const struct acpi_gpio_params *data;
|
|
unsigned int size;
|
|
|
|
/* Ignore IoRestriction field */
|
|
#define ACPI_GPIO_QUIRK_NO_IO_RESTRICTION BIT(0)
|
|
/*
|
|
* When ACPI GPIO mapping table is in use the index parameter inside it
|
|
* refers to the GPIO resource in _CRS method. That index has no
|
|
* distinction of actual type of the resource. When consumer wants to
|
|
* get GpioIo type explicitly, this quirk may be used.
|
|
*/
|
|
#define ACPI_GPIO_QUIRK_ONLY_GPIOIO BIT(1)
|
|
/* Use given pin as an absolute GPIO number in the system */
|
|
#define ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER BIT(2)
|
|
|
|
unsigned int quirks;
|
|
};
|
|
|
|
struct acpi_device;
|
|
|
|
#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_ACPI)
|
|
|
|
int acpi_dev_add_driver_gpios(struct acpi_device *adev,
|
|
const struct acpi_gpio_mapping *gpios);
|
|
void acpi_dev_remove_driver_gpios(struct acpi_device *adev);
|
|
|
|
int devm_acpi_dev_add_driver_gpios(struct device *dev,
|
|
const struct acpi_gpio_mapping *gpios);
|
|
|
|
struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin, char *label);
|
|
|
|
#else /* CONFIG_GPIOLIB && CONFIG_ACPI */
|
|
|
|
static inline int acpi_dev_add_driver_gpios(struct acpi_device *adev,
|
|
const struct acpi_gpio_mapping *gpios)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
static inline void acpi_dev_remove_driver_gpios(struct acpi_device *adev) {}
|
|
|
|
static inline int devm_acpi_dev_add_driver_gpios(struct device *dev,
|
|
const struct acpi_gpio_mapping *gpios)
|
|
{
|
|
return -ENXIO;
|
|
}
|
|
|
|
static inline struct gpio_desc *acpi_get_and_request_gpiod(char *path, unsigned int pin,
|
|
char *label)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB && CONFIG_ACPI */
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS)
|
|
|
|
int gpiod_export(struct gpio_desc *desc, bool direction_may_change);
|
|
int gpiod_export_link(struct device *dev, const char *name,
|
|
struct gpio_desc *desc);
|
|
void gpiod_unexport(struct gpio_desc *desc);
|
|
|
|
#else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
|
|
|
|
static inline int gpiod_export(struct gpio_desc *desc,
|
|
bool direction_may_change)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_export_link(struct device *dev, const char *name,
|
|
struct gpio_desc *desc)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline void gpiod_unexport(struct gpio_desc *desc)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
|
|
|
|
#endif
|