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pinctrl: core: Add generic pinctrl functions for managing groups

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We can add generic helpers for pin group handling for cases where the pin
controller driver does not need to use static arrays.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Tony Lindgren
2016-12-27 09:20:00 -08:00
committed by Linus Walleij
parent 2d22e5b006
commit c7059c5ac7
3 changed files with 228 additions and 0 deletions
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47
drivers/pinctrl/core.h
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@@ -24,6 +24,8 @@ struct pinctrl_gpio_range;
* controller
* @pin_desc_tree: each pin descriptor for this pin controller is stored in
* this radix tree
* @pin_group_tree: optionally each pin group can be stored in this radix tree
* @num_groups: optionally number of groups can be kept here
* @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
* ranges are added to this list at runtime
* @dev: the device entry for this pin controller
@@ -41,6 +43,8 @@ struct pinctrl_dev {
struct list_head node;
struct pinctrl_desc *desc;
struct radix_tree_root pin_desc_tree;
struct radix_tree_root pin_group_tree;
unsigned int num_groups;
struct list_head gpio_ranges;
struct device *dev;
struct module *owner;
@@ -161,6 +165,20 @@ struct pin_desc {
#endif
};
/**
* struct group_desc - generic pin group descriptor
* @name: name of the pin group
* @pins: array of pins that belong to the group
* @num_pins: number of pins in the group
* @data: pin controller driver specific data
*/
struct group_desc {
const char *name;
int *pins;
int num_pins;
void *data;
};
/**
* struct pinctrl_maps - a list item containing part of the mapping table
* @node: mapping table list node
@@ -173,6 +191,35 @@ struct pinctrl_maps {
unsigned num_maps;
};
#ifdef CONFIG_GENERIC_PINCTRL
int pinctrl_generic_get_group_count(struct pinctrl_dev *pctldev);
const char *pinctrl_generic_get_group_name(struct pinctrl_dev *pctldev,
unsigned int group_selector);
int pinctrl_generic_get_group_pins(struct pinctrl_dev *pctldev,
unsigned int group_selector,
const unsigned int **pins,
unsigned int *npins);
struct group_desc *pinctrl_generic_get_group(struct pinctrl_dev *pctldev,
unsigned int group_selector);
int pinctrl_generic_add_group(struct pinctrl_dev *pctldev, const char *name,
int *gpins, int ngpins, void *data);
int pinctrl_generic_remove_group(struct pinctrl_dev *pctldev,
unsigned int group_selector);
static inline int
pinctrl_generic_remove_last_group(struct pinctrl_dev *pctldev)
{
return pinctrl_generic_remove_group(pctldev, pctldev->num_groups - 1);
}
#endif /* CONFIG_GENERIC_PINCTRL */
struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np);
int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);