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gpio: Initialize the irqchip valid_mask with a callback

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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
This commit is contained in:
Linus Walleij 2019-09-04 16:01:04 +02:00
parent 4f78d91c72
commit 5fbe5b5883
8 changed files with 111 additions and 54 deletions
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14
include/linux/gpio/driver.h
View file

@ -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: