[PATCH 6/6 v2] RFT: gpio: uniphier: Restrict valid interrupts

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

The Uniphier GPIO can only create interrupt mappings on
GPIOs offset 0..23. Set the valid_mask in the struct
gpio_irqchip and clear bits 24..ngpios indicating that
these can not be mapped to interrupts.

Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Thierry Reding <treding@xxxxxxxxxx>
Cc: Brian Masney <masneyb@xxxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog RFT -> RTF v2:
- New patch to set the valid mask for the interrupts.
---
 drivers/gpio/gpio-uniphier.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpio/gpio-uniphier.c b/drivers/gpio/gpio-uniphier.c
index 86e8446215fc..9840fcf7de57 100644
--- a/drivers/gpio/gpio-uniphier.c
+++ b/drivers/gpio/gpio-uniphier.c
@@ -338,6 +338,7 @@ static int uniphier_gpio_probe(struct platform_device *pdev)
 	girq->child_to_parent_hwirq = uniphier_gpio_child_to_parent_hwirq;
 	girq->handler = handle_bad_irq;
 	girq->default_type = IRQ_TYPE_NONE;
+	girq->need_valid_mask = true;
 
 	uniphier_gpio_hw_init(priv);
 
@@ -345,6 +346,10 @@ static int uniphier_gpio_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+	/* Only GPIOs 0..UNIPHIER_GPIO_IRQ_MAX_NUM are valid for interrupts */
+	bitmap_clear(girq->valid_mask, UNIPHIER_GPIO_IRQ_MAX_NUM,
+		     ngpios - UNIPHIER_GPIO_IRQ_MAX_NUM);
+
 	platform_set_drvdata(pdev, priv);
 
 	return 0;
-- 
2.21.0