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authorLinus Walleij <linus.walleij@linaro.org>2016-11-24 10:57:25 +0100
committerLinus Walleij <linus.walleij@linaro.org>2016-11-25 15:12:27 +0100
commitd245b3f9bd36f02fd641cba9931d8b4c77126e74 (patch)
treefa9984376f28c4f6b8883aff8a704178aa68412f /drivers/gpio/gpio-pcf857x.c
parent07d9a380680d1c0eb51ef87ff2eab5c994949e69 (diff)
downloadlinux-d245b3f9bd36f02fd641cba9931d8b4c77126e74.tar.bz2
gpio: simplify adding threaded interrupts
This tries to simplify the use of CONFIG_GPIOLIB_IRQCHIP when using threaded interrupts: add a new call gpiochip_irqchip_add_nested() to indicate that we're dealing with a nested rather than a chained irqchip, then create a separate gpiochip_set_nested_irqchip() to mirror the gpiochip_set_chained_irqchip() call to connect the parent and child interrupts. In the nested case gpiochip_set_nested_irqchip() does nothing more than call irq_set_parent() on each valid child interrupt, which has little semantic effect in the kernel, but this is probably still formally correct. Update all drivers using nested interrupts to use gpiochip_irqchip_add_nested() so we can now see clearly which these users are. The DLN2 driver can drop its specific hack with .irq_not_threaded as we now recognize whether a chip is threaded or not from its use of gpiochip_irqchip_add_nested() signature rather than from inspecting .can_sleep. We rename the .irq_parent to .irq_chained_parent since this parent IRQ is only really kept around for the chained interrupt handlers. Cc: Lars Poeschel <poeschel@lemonage.de> Cc: Octavian Purdila <octavian.purdila@intel.com> Cc: Daniel Baluta <daniel.baluta@intel.com> Cc: Bin Gao <bin.gao@linux.intel.com> Cc: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: Ajay Thomas <ajay.thomas.david.rajamanickam@intel.com> Cc: Semen Protsenko <semen.protsenko@globallogic.com> Cc: Alexander Stein <alexander.stein@systec-electronic.com> Cc: Phil Reid <preid@electromag.com.au> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-pcf857x.c')
-rw-r--r--drivers/gpio/gpio-pcf857x.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index d168410e2338..895af42a4513 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -378,9 +378,10 @@ static int pcf857x_probe(struct i2c_client *client,
/* Enable irqchip if we have an interrupt */
if (client->irq) {
- status = gpiochip_irqchip_add(&gpio->chip, &pcf857x_irq_chip,
- 0, handle_level_irq,
- IRQ_TYPE_NONE);
+ status = gpiochip_irqchip_add_nested(&gpio->chip,
+ &pcf857x_irq_chip,
+ 0, handle_level_irq,
+ IRQ_TYPE_NONE);
if (status) {
dev_err(&client->dev, "cannot add irqchip\n");
goto fail;
@@ -393,8 +394,8 @@ static int pcf857x_probe(struct i2c_client *client,
if (status)
goto fail;
- gpiochip_set_chained_irqchip(&gpio->chip, &pcf857x_irq_chip,
- client->irq, NULL);
+ gpiochip_set_nested_irqchip(&gpio->chip, &pcf857x_irq_chip,
+ client->irq);
gpio->irq_parent = client->irq;
}