drivers/mfd/mt6358-irq.c

Source file repositories/reference/linux-study-clean/drivers/mfd/mt6358-irq.c

File Facts

System
Linux kernel
Corpus path
drivers/mfd/mt6358-irq.c
Extension
.c
Size
7263 bytes
Lines
295
Domain
Driver Families
Bucket
drivers/mfd
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (ret) {
			dev_err(chip->dev,
				"Failed to read IRQ status, ret=%d\n", ret);
			return;
		}

		if (!irq_status)
			continue;

		status = irq_status;
		do {
			j = __ffs(status);

			hwirq = irqd->pmic_ints[top_gp].hwirq_base +
				MTK_PMIC_REG_WIDTH * i + j;

			virq = irq_find_mapping(chip->irq_domain, hwirq);
			if (virq)
				handle_nested_irq(virq);

			status &= ~BIT(j);
		} while (status);

		regmap_write(chip->regmap, sta_reg, irq_status);
	}
}

static irqreturn_t mt6358_irq_handler(int irq, void *data)
{
	struct mt6397_chip *chip = data;
	struct pmic_irq_data *irqd = chip->irq_data;
	unsigned int bit, i, top_irq_status = 0;
	int ret;

	ret = regmap_read(chip->regmap,
			  irqd->top_int_status_reg,
			  &top_irq_status);
	if (ret) {
		dev_err(chip->dev,
			"Failed to read status from the device, ret=%d\n", ret);
		return IRQ_NONE;
	}

	for (i = 0; i < irqd->num_top; i++) {
		bit = BIT(irqd->pmic_ints[i].top_offset);
		if (top_irq_status & bit) {
			mt6358_irq_sp_handler(chip, i);
			top_irq_status &= ~bit;
			if (!top_irq_status)
				break;
		}
	}

	return IRQ_HANDLED;
}

static int pmic_irq_domain_map(struct irq_domain *d, unsigned int irq,
			       irq_hw_number_t hw)
{
	struct mt6397_chip *mt6397 = d->host_data;

	irq_set_chip_data(irq, mt6397);
	irq_set_chip_and_handler(irq, &mt6358_irq_chip, handle_level_irq);
	irq_set_nested_thread(irq, 1);
	irq_set_noprobe(irq);

	return 0;
}

static const struct irq_domain_ops mt6358_irq_domain_ops = {
	.map = pmic_irq_domain_map,
	.xlate = irq_domain_xlate_twocell,
};

int mt6358_irq_init(struct mt6397_chip *chip)
{
	int i, j, ret;
	struct pmic_irq_data *irqd;

	switch (chip->chip_id) {
	case MT6357_CHIP_ID:
		chip->irq_data = &mt6357_irqd;
		break;

	case MT6358_CHIP_ID:
	case MT6366_CHIP_ID:
		chip->irq_data = &mt6358_irqd;
		break;

	case MT6359_CHIP_ID:

Annotation

Implementation Notes