Commit 2fd4fe19 authored by Biju Das's avatar Biju Das Committed by Geert Uytterhoeven
Browse files

pinctrl: renesas: rzg2l: Configure interrupt input mode 



Configure GPIO interrupt as input mode. Also if the bootloader sets
gpio interrupt pin as function, override it as gpio.

Signed-off-by: default avatarBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240206135115.151218-2-biju.das.jz@bp.renesas.com


Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
parent 97191e53

drivers/pinctrl/renesas/pinctrl-rzg2l.c

+35 −2
Original line number Diff line number Diff line
@@ -1894,6 +1894,26 @@ static const struct irq_chip rzg2l_gpio_irqchip = { 
	GPIOCHIP_IRQ_RESOURCE_HELPERS,

};



static int rzg2l_gpio_interrupt_input_mode(struct gpio_chip *chip, unsigned int offset)

{

	struct rzg2l_pinctrl *pctrl = gpiochip_get_data(chip);

	const struct pinctrl_pin_desc *pin_desc = &pctrl->desc.pins[offset];

	u64 *pin_data = pin_desc->drv_data;

	u32 off = RZG2L_PIN_CFG_TO_PORT_OFFSET(*pin_data);

	u8 bit = RZG2L_PIN_ID_TO_PIN(offset);

	u8 reg8;

	int ret;



	reg8 = readb(pctrl->base + PMC(off));

	if (reg8 & BIT(bit)) {

		ret = rzg2l_gpio_request(chip, offset);

		if (ret)

			return ret;

	}



	return rzg2l_gpio_direction_input(chip, offset);

}



static int rzg2l_gpio_child_to_parent_hwirq(struct gpio_chip *gc,

					    unsigned int child,

					    unsigned int child_type,
@@ -1903,16 +1923,24 @@ static int rzg2l_gpio_child_to_parent_hwirq(struct gpio_chip *gc, 
	struct rzg2l_pinctrl *pctrl = gpiochip_get_data(gc);

	unsigned long flags;

	int gpioint, irq;

	int ret;



	gpioint = rzg2l_gpio_get_gpioint(child, pctrl);

	if (gpioint < 0)

		return gpioint;



	ret = rzg2l_gpio_interrupt_input_mode(gc, child);

	if (ret)

		return ret;



	spin_lock_irqsave(&pctrl->bitmap_lock, flags);

	irq = bitmap_find_free_region(pctrl->tint_slot, RZG2L_TINT_MAX_INTERRUPT, get_order(1));

	spin_unlock_irqrestore(&pctrl->bitmap_lock, flags);

	if (irq < 0)

		return -ENOSPC;

	if (irq < 0) {

		ret = -ENOSPC;

		goto err;

	}



	pctrl->hwirq[irq] = child;

	irq += RZG2L_TINT_IRQ_START_INDEX;
@@ -1920,6 +1948,10 @@ static int rzg2l_gpio_child_to_parent_hwirq(struct gpio_chip *gc, 
	*parent_type = IRQ_TYPE_LEVEL_HIGH;

	*parent = RZG2L_PACK_HWIRQ(gpioint, irq);

	return 0;



err:

	rzg2l_gpio_free(gc, child);

	return ret;

}



static int rzg2l_gpio_populate_parent_fwspec(struct gpio_chip *chip,
@@ -1952,6 +1984,7 @@ static void rzg2l_gpio_irq_domain_free(struct irq_domain *domain, unsigned int v 


		for (i = 0; i < RZG2L_TINT_MAX_INTERRUPT; i++) {

			if (pctrl->hwirq[i] == hwirq) {

				rzg2l_gpio_free(gc, hwirq);

				spin_lock_irqsave(&pctrl->bitmap_lock, flags);

				bitmap_release_region(pctrl->tint_slot, i, get_order(1));

				spin_unlock_irqrestore(&pctrl->bitmap_lock, flags);