gpio: pca953x: use a per instance irq_chip structure

Browse source

When a system has two PCA953x GPIO expanders, the kernel complains with:

gpio gpiochip2: (0-0021): detected irqchip that is shared with multiple gpiochips: please fix the driver.

Indeed, there is a single instance of "struct irq_chip" that gets
re-used for both PCA953x instance. This commit moves the "struct
irq_chip" to be part of the "struct pca953x_chip", so that we have one
"struct irq_chip" per PCA953X instance.

As part of this, the name of the irq_chip is also made different on a
per-instance basis, now using the dev_name() of the I2C device. This
changes what is visible in /proc/interrupts.

Before:

 47:          0          0   pca953x  10 Edge      e0100000.sdhci cd
 48:          0          0   pca953x   6 Edge      e0101000.sdhci cd

After:

 47:          0          0    0-0020  10 Edge      e0100000.sdhci cd
 48:          2          0    0-0020   6 Edge      e0101000.sdhci cd

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

...

This commit is contained in:

Thomas Petazzoni 2019-01-16 10:31:58 +01:00 • committed by Linus Walleij

parent 7341fa7a6b

commit 5c4fee63c5

1 changed files with 12 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

25

drivers/gpio/gpio-pca953x.c

View file