Merge tag 'gpio-v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for the v4.20 series:
Core changes:
- A patch series from Hans Verkuil to make it possible to
enable/disable IRQs on a GPIO line at runtime and drive GPIO lines
as output without having to put/get them from scratch.
The irqchip callbacks have been improved so that they can use only
the fastpatch callbacks to enable/disable irqs like any normal
irqchip, especially the gpiod_lock_as_irq() has been improved to be
callable in fastpath context.
A bunch of rework had to be done to achieve this but it is a big
win since I never liked to restrict this to slowpath. The only call
requireing slowpath was try_module_get() and this is kept at the
.request_resources() slowpath callback. In the GPIO CEC driver this
is a big win sine a single line is used for both outgoing and
incoming traffic, and this needs to use IRQs for incoming traffic
while actively driving the line for outgoing traffic.
- Janusz Krzysztofik improved the GPIO array API to pass a "cookie"
(struct gpio_array) and a bitmap for setting or getting multiple
GPIO lines at once.
This improvement orginated in a specific need to speed up an OMAP1
driver and has led to a much better API and real performance gains
when the state of the array can be used to bypass a lot of checks
and code when we want things to go really fast.
The previous code would minimize the number of calls down to the
driver callbacks assuming the CPU speed was orders of magnitude
faster than the I/O latency, but this assumption was wrong on
several platforms: what we needed to do was to profile and improve
the speed on the hot path of the array functions and this change is
now completed.
- Clean out the painful and hard to grasp BNF experiments from the
device tree bindings. Future approaches are looking into using JSON
schema for this purpose. (Rob Herring is floating a patch series.)
New drivers:
- The RCAR driver now supports r8a774a1 (RZ/G2M).
- Synopsys GPIO via CREGs driver.
Major improvements:
- Modernization of the EP93xx driver to use irqdomain and other
contemporary concepts.
- The ingenic driver has been merged into the Ingenic pin control
driver and removed from the GPIO subsystem.
- Debounce support in the ftgpio010 driver"
* tag 'gpio-v4.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (116 commits)
gpio: Clarify kerneldoc on gpiochip_set_chained_irqchip()
gpio: Remove unused 'irqchip' argument to gpiochip_set_cascaded_irqchip()
gpio: Drop parent irq assignment during cascade setup
mmc: pwrseq_simple: Fix incorrect handling of GPIO bitmap
gpio: fix SNPS_CREG kconfig dependency warning
gpiolib: Initialize gdev field before is used
gpio: fix kernel-doc after devres.c file rename
gpio: fix doc string for devm_gpiochip_add_data() to not talk about irq_chip
gpio: syscon: Fix possible NULL ptr usage
gpiolib: Show correct direction from the beginning
pinctrl: msm: Use init_valid_mask exported function
gpiolib: Add init_valid_mask exported function
GPIO: add single-register GPIO via CREG driver
dt-bindings: Document the Synopsys GPIO via CREG bindings
gpio: mockup: use device properties instead of platform_data
gpio: Slightly more helpful debugfs
gpio: omap: Remove set but not used variable 'dev'
gpio: omap: drop omap_gpio_list
Accept partial 'gpio-line-names' property.
gpio: omap: get rid of the conditional PM runtime calls
...
This commit is contained in:
Linus Torvalds
@@ -17,11 +17,20 @@ struct device;
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*/
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struct gpio_desc;
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/**
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* Opaque descriptor for a structure of GPIO array attributes. This structure
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* is attached to struct gpiod_descs obtained from gpiod_get_array() and can be
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* passed back to get/set array functions in order to activate fast processing
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* path if applicable.
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*/
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struct gpio_array;
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/**
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* Struct containing an array of descriptors that can be obtained using
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* gpiod_get_array().
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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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@@ -105,36 +114,46 @@ int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
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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, int *value_array);
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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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void gpiod_set_array_value(unsigned int array_size,
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struct gpio_desc **desc_array, int *value_array);
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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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int *value_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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int *value_array);
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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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int *value_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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void gpiod_set_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_array);
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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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int *value_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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int *value_array);
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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_debounce(struct gpio_desc *desc, unsigned debounce);
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int gpiod_set_transitory(struct gpio_desc *desc, bool transitory);
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@@ -331,7 +350,8 @@ static inline int gpiod_get_value(const struct gpio_desc *desc)
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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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int *value_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(1);
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@@ -342,12 +362,14 @@ static inline void gpiod_set_value(struct gpio_desc *desc, int value)
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/* GPIO can never have been requested */
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WARN_ON(1);
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}
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static inline void gpiod_set_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_array)
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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(1);
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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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@@ -357,7 +379,8 @@ static inline int gpiod_get_raw_value(const struct gpio_desc *desc)
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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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int *value_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(1);
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@@ -369,8 +392,9 @@ static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value)
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WARN_ON(1);
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}
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static inline int gpiod_set_raw_array_value(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_array)
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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(1);
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@@ -385,7 +409,8 @@ static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc)
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}
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static inline int gpiod_get_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_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(1);
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@@ -396,12 +421,14 @@ static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
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/* GPIO can never have been requested */
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WARN_ON(1);
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}
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static inline void gpiod_set_array_value_cansleep(unsigned int array_size,
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static inline int gpiod_set_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_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(1);
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return 0;
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}
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static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
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{
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@@ -411,7 +438,8 @@ static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
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}
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static inline int gpiod_get_raw_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_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(1);
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@@ -425,7 +453,8 @@ static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc,
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}
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static inline int gpiod_set_raw_array_value_cansleep(unsigned int array_size,
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struct gpio_desc **desc_array,
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int *value_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(1);
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