[PATCH v6 3/8] gpio: regmap: Apply default resource callbacks for regmap IRQ chip

[Yu-Chun Lin <eleanor.lin@realtek.com>]

From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

When GPIO regmap creates an IRQ chip on behalf of the user, it also
takes an ownership of the respective callbacks and driver data.
With that being done, apply default resource callbacks that keep
tracking the IRQ requests and releases.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yu-Chun Lin <eleanor.lin@realtek.com>
---
Changes in this version:
- Move gpio_regmap_irq_reqres() and gpio_regmap_irq_relres() implementation
  from patch 2 to this patch.
- Add '_maybe_unused' to prevent build fail when CONFIG_REGMAP_IRQ is not
enabled.

 drivers/gpio/gpio-max7360.c |  7 ++++---
 drivers/gpio/gpio-regmap.c  | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpio-max7360.c b/drivers/gpio/gpio-max7360.c
index d12cf1dc8d57..07eda49f375b 100644
--- a/drivers/gpio/gpio-max7360.c
+++ b/drivers/gpio/gpio-max7360.c
@@ -127,7 +127,7 @@ static int max7360_handle_mask_sync(const int index,
 				    const unsigned int mask_buf,
 				    void *const irq_drv_data)
 {
-	struct regmap *regmap = irq_drv_data;
+	struct regmap *regmap = gpio_regmap_get_drvdata(irq_drv_data);
 	int ret;
 
 	for (unsigned int i = 0; i < MAX7360_MAX_GPIO; i++) {
@@ -170,7 +170,6 @@ static int max7360_gpio_probe(struct platform_device *pdev)
 
 			/* Create custom IRQ configuration. */
 			irq_chip = devm_kzalloc(dev, sizeof(*irq_chip), GFP_KERNEL);
-			gpio_config.regmap_irq_chip = irq_chip;
 			if (!irq_chip)
 				return -ENOMEM;
 
@@ -181,7 +180,9 @@ static int max7360_gpio_probe(struct platform_device *pdev)
 			irq_chip->num_irqs = MAX7360_MAX_GPIO;
 			irq_chip->irqs = max7360_regmap_irqs;
 			irq_chip->handle_mask_sync = max7360_handle_mask_sync;
-			irq_chip->irq_drv_data = regmap;
+
+			gpio_config.regmap_irq_chip = irq_chip;
+			gpio_config.drvdata = regmap;
 
 			for (unsigned int i = 0; i < MAX7360_MAX_GPIO; i++) {
 				ret = regmap_write_bits(regmap, MAX7360_REG_PWMCFG(i),
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
index 535bd9deaa71..658b892b624c 100644
--- a/drivers/gpio/gpio-regmap.c
+++ b/drivers/gpio/gpio-regmap.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/bits.h>
+#include <linux/compiler_attributes.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/io.h>
@@ -288,6 +289,16 @@ void gpio_regmap_relres_irq(struct gpio_regmap *gpio, unsigned int offset)
 }
 EXPORT_SYMBOL_GPL(gpio_regmap_relres_irq);
 
+static int __maybe_unused gpio_regmap_irq_reqres(void *irq_drv_data, irq_hw_number_t hwirq)
+{
+	return gpio_regmap_reqres_irq(irq_drv_data, hwirq);
+}
+
+static void __maybe_unused gpio_regmap_irq_relres(void *irq_drv_data, irq_hw_number_t hwirq)
+{
+	gpio_regmap_relres_irq(irq_drv_data, hwirq);
+}
+
 void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)
 {
 	return gpio->driver_data;
@@ -409,6 +420,9 @@ struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config
 #ifdef CONFIG_REGMAP_IRQ
 	if (config->regmap_irq_chip) {
 		gpio->regmap_irq_line = config->regmap_irq_line;
+		config->regmap_irq_chip->irq_reqres = gpio_regmap_irq_reqres;
+		config->regmap_irq_chip->irq_relres = gpio_regmap_irq_relres;
+		config->regmap_irq_chip->irq_drv_data = gpio;
 		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);
-- 
2.43.0