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gpio: regmap: Allow to allocate regmap-irq device 

GPIO controller often have support for IRQ: allow to easily allocate
both gpio-regmap and regmap-irq in one operation.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Link: https://lore.kernel.org/r/20250824-mdb-max7360-support-v14-5-435cfda2b1ea@bootlin.com
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Mathieu Dubois-Briand 2025-08-24 13:57:24 +02:00 committed by Lee Jones
parent d93a75d94b
commit 553b75d4bf
2 changed files with 38 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
drivers/gpio/gpio-regmap.c
View File

@ -32,6 +32,11 @@ struct gpio_regmap {
unsigned int reg_dir_in_base;
unsigned int reg_dir_out_base;
#ifdef CONFIG_REGMAP_IRQ
int regmap_irq_line;
struct regmap_irq_chip_data *irq_chip_data;
#endif
int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
unsigned int offset, unsigned int *reg,
unsigned int *mask);
@ -215,6 +220,7 @@ EXPORT_SYMBOL_GPL(gpio_regmap_get_drvdata);
*/
struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config)
{
struct irq_domain *irq_domain;
struct gpio_regmap *gpio;
struct gpio_chip *chip;
int ret;
@ -295,8 +301,22 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
if (ret < 0)
goto err_free_gpio;
if (config->irq_domain) {
ret = gpiochip_irqchip_add_domain(chip, config->irq_domain);
#ifdef CONFIG_REGMAP_IRQ
if (config->regmap_irq_chip) {
gpio->regmap_irq_line = config->regmap_irq_line;
ret = regmap_add_irq_chip_fwnode(dev_fwnode(config->parent), config->regmap,
config->regmap_irq_line, config->regmap_irq_flags,
0, config->regmap_irq_chip, &gpio->irq_chip_data);
if (ret)
goto err_free_gpio;
irq_domain = regmap_irq_get_domain(gpio->irq_chip_data);
} else
#endif
irq_domain = config->irq_domain;
if (irq_domain) {
ret = gpiochip_irqchip_add_domain(chip, irq_domain);
if (ret)
goto err_remove_gpiochip;
}
@ -317,6 +337,11 @@ EXPORT_SYMBOL_GPL(gpio_regmap_register);
*/
void gpio_regmap_unregister(struct gpio_regmap *gpio)
{
#ifdef CONFIG_REGMAP_IRQ
if (gpio->irq_chip_data)
regmap_del_irq_chip(gpio->regmap_irq_line, gpio->irq_chip_data);
#endif
gpiochip_remove(&gpio->gpio_chip);
kfree(gpio);
}

11
include/linux/gpio/regmap.h
View File

@ -40,6 +40,11 @@ struct regmap;
* @drvdata: (Optional) Pointer to driver specific data which is
* not used by gpio-remap but is provided "as is" to the
* driver callback(s).
* @regmap_irq_chip: (Optional) Pointer on an regmap_irq_chip structure. If
* set, a regmap-irq device will be created and the IRQ
* domain will be set accordingly.
* @regmap_irq_line (Optional) The IRQ the device uses to signal interrupts.
* @regmap_irq_flags (Optional) The IRQF_ flags to use for the interrupt.
*
* The ->reg_mask_xlate translates a given base address and GPIO offset to
* register and mask pair. The base address is one of the given register
@ -78,6 +83,12 @@ struct gpio_regmap_config {
int ngpio_per_reg;
struct irq_domain *irq_domain;
#ifdef CONFIG_REGMAP_IRQ
struct regmap_irq_chip *regmap_irq_chip;
int regmap_irq_line;
unsigned long regmap_irq_flags;
#endif
int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
unsigned int offset, unsigned int *reg,
unsigned int *mask);