Merge tag 'gpio-fixes-for-v5.8-rc3' of... (93e0272a) · Commits · 戴 / test

drivers/gpio/gpio-pca953x.c

+94 −5

Original line number	Diff line number	Diff line
		@@ -107,6 +107,84 @@ static const struct i2c_device_id pca953x_id[] = {
		};
		MODULE_DEVICE_TABLE(i2c, pca953x_id);

		#ifdef CONFIG_GPIO_PCA953X_IRQ

		#include <linux/dmi.h>
		#include <linux/gpio.h>
		#include <linux/list.h>

		static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = {
		{
		/*
		* On Intel Galileo Gen 2 board the IRQ pin of one of
		* the I²C GPIO expanders, which has GpioInt() resource,
		* is provided as an absolute number instead of being
		* relative. Since first controller (gpio-sch.c) and
		* second (gpio-dwapb.c) are at the fixed bases, we may
		* safely refer to the number in the global space to get
		* an IRQ out of it.
		*/
		.matches = {
		DMI_EXACT_MATCH(DMI_BOARD_NAME, "GalileoGen2"),
		},
		},
		{}
		};

		#ifdef CONFIG_ACPI
		static int pca953x_acpi_get_pin(struct acpi_resource ares, void data)
		{
		struct acpi_resource_gpio *agpio;
		int *pin = data;

		if (acpi_gpio_get_irq_resource(ares, &agpio))
		*pin = agpio->pin_table[0];
		return 1;
		}

		static int pca953x_acpi_find_pin(struct device *dev)
		{
		struct acpi_device *adev = ACPI_COMPANION(dev);
		int pin = -ENOENT, ret;
		LIST_HEAD(r);

		ret = acpi_dev_get_resources(adev, &r, pca953x_acpi_get_pin, &pin);
		acpi_dev_free_resource_list(&r);
		if (ret < 0)
		return ret;

		return pin;
		}
		#else
		static inline int pca953x_acpi_find_pin(struct device *dev) { return -ENXIO; }
		#endif

		static int pca953x_acpi_get_irq(struct device *dev)
		{
		int pin, ret;

		pin = pca953x_acpi_find_pin(dev);
		if (pin < 0)
		return pin;

		dev_info(dev, "Applying ACPI interrupt quirk (GPIO %d)\n", pin);

		if (!gpio_is_valid(pin))
		return -EINVAL;

		ret = gpio_request(pin, "pca953x interrupt");
		if (ret)
		return ret;

		ret = gpio_to_irq(pin);

		/* When pin is used as an IRQ, no need to keep it requested */
		gpio_free(pin);

		return ret;
		}
		#endif

		static const struct acpi_device_id pca953x_acpi_ids[] = {
		{ "INT3491", 16 \| PCA953X_TYPE \| PCA_LATCH_INT, },
		{ }
		@@ -322,6 +400,7 @@ static const struct regmap_config pca953x_ai_i2c_regmap = {
		.writeable_reg = pca953x_writeable_register,
		.volatile_reg = pca953x_volatile_register,

		.disable_locking = true,
		.cache_type = REGCACHE_RBTREE,
		.max_register = 0x7f,
		};
		@@ -623,8 +702,6 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
		DECLARE_BITMAP(reg_direction, MAX_LINE);
		int level;

		pca953x_read_regs(chip, chip->regs->direction, reg_direction);

		if (chip->driver_data & PCA_PCAL) {
		/* Enable latch on interrupt-enabled inputs */
		pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask);
		@@ -635,7 +712,11 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
		pca953x_write_regs(chip, PCAL953X_INT_MASK, irq_mask);
		}

		/* Switch direction to input if needed */
		pca953x_read_regs(chip, chip->regs->direction, reg_direction);

		bitmap_or(irq_mask, chip->irq_trig_fall, chip->irq_trig_raise, gc->ngpio);
		bitmap_complement(reg_direction, reg_direction, gc->ngpio);
		bitmap_and(irq_mask, irq_mask, reg_direction, gc->ngpio);

		/* Look for any newly setup interrupt */
		@@ -734,14 +815,16 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid)
		struct gpio_chip *gc = &chip->gpio_chip;
		DECLARE_BITMAP(pending, MAX_LINE);
		int level;
		bool ret;

		if (!pca953x_irq_pending(chip, pending))
		return IRQ_NONE;
		mutex_lock(&chip->i2c_lock);
		ret = pca953x_irq_pending(chip, pending);
		mutex_unlock(&chip->i2c_lock);

		for_each_set_bit(level, pending, gc->ngpio)
		handle_nested_irq(irq_find_mapping(gc->irq.domain, level));

		return IRQ_HANDLED;
		return IRQ_RETVAL(ret);
		}

		static int pca953x_irq_setup(struct pca953x_chip *chip, int irq_base)
		@@ -752,6 +835,12 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, int irq_base)
		DECLARE_BITMAP(irq_stat, MAX_LINE);
		int ret;

		if (dmi_first_match(pca953x_dmi_acpi_irq_info)) {
		ret = pca953x_acpi_get_irq(&client->dev);
		if (ret > 0)
		client->irq = ret;
		}

		if (!client->irq)
		return 0;

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