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authorLinus Walleij <linus.walleij@linaro.org>2019-09-04 17:01:04 +0300
committerLinus Walleij <linus.walleij@linaro.org>2019-09-11 03:09:37 +0300
commit5fbe5b5883f847363ff1b7280e8b1d2980526b8e (patch)
tree806efff2538fb4d6860cae617f4990f47481db7c /include/linux/gpio
parent4f78d91c722345de94a3c72da49b9d0d49cb76b8 (diff)
downloadlinux-5fbe5b5883f847363ff1b7280e8b1d2980526b8e.tar.xz
gpio: Initialize the irqchip valid_mask with a callback
After changing the valid_mask for the struct gpio_chip to detect the need and presence of a valid mask with the presence of a .init_valid_mask() callback to fill it in, we augment the gpio_irq_chip to use the same logic. Switch all driver using the gpio_irq_chio valid_mask over to this new method. This makes sure the valid_mask for the gpio_irq_chip gets filled in when we add the gpio_chip, which makes it a little easier to switch over drivers using the old way of setting up gpio_irq_chip over to the new method of passing the gpio_irq_chip along with the gpio_chip. (See drivers/gpio/TODO for details.) Cc: Joel Stanley <joel@jms.id.au> Cc: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Andrew Jeffery <andrew@aj.id.au> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Patrice Chotard <patrice.chotard@st.com> Link: https://lore.kernel.org/r/20190904140104.32426-1-linus.walleij@linaro.org
Diffstat (limited to 'include/linux/gpio')
-rw-r--r--include/linux/gpio/driver.h14
1 files changed, 10 insertions, 4 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index c667ad0c099d..f8245d67f070 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -202,11 +202,17 @@ struct gpio_irq_chip {
bool threaded;
/**
- * @need_valid_mask:
- *
- * If set core allocates @valid_mask with all bits set to one.
+ * @init_valid_mask: optional routine to initialize @valid_mask, to be
+ * used if not all GPIO lines are valid interrupts. Sometimes some
+ * lines just cannot fire interrupts, and this routine, when defined,
+ * is passed a bitmap in "valid_mask" and it will have ngpios
+ * bits from 0..(ngpios-1) set to "1" as in valid. The callback can
+ * then directly set some bits to "0" if they cannot be used for
+ * interrupts.
*/
- bool need_valid_mask;
+ void (*init_valid_mask)(struct gpio_chip *chip,
+ unsigned long *valid_mask,
+ unsigned int ngpios);
/**
* @valid_mask: