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| author | Linus Walleij <linus.walleij@linaro.org> | 2013-11-26 12:33:41 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-02-03 09:11:58 +0100 |
| commit | f6f293112e3d747e5d39ff0d12793909c3946035 (patch) | |
| tree | 289c1a01a95644f4ed55888c450c16979cde8199 /drivers/gpio/gpio-pl061.c | |
| parent | 7808755d4b0ccdaa9e78edfc8cce94f51c5c8da4 (diff) | |
| download | linux-f6f293112e3d747e5d39ff0d12793909c3946035.tar.gz linux-f6f293112e3d747e5d39ff0d12793909c3946035.tar.bz2 linux-f6f293112e3d747e5d39ff0d12793909c3946035.zip | |
gpio: pl061: lock IRQs when starting them
This uses the new API for tagging GPIO lines as in use by
IRQs. This enforces a few semantic checks on how the underlying
GPIO line is used.
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Deepak Sikri <deepak.sikri@st.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-pl061.c')
| -rw-r--r-- | drivers/gpio/gpio-pl061.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index eba66c7efb18..93b51e339a27 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -231,11 +231,33 @@ static void pl061_irq_unmask(struct irq_data *d) spin_unlock(&chip->lock); } +static unsigned int pl061_irq_startup(struct irq_data *d) +{ + struct pl061_gpio *chip = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&chip->gc, irqd_to_hwirq(d))) + dev_err(chip->gc.dev, + "unable to lock HW IRQ %lu for IRQ\n", + irqd_to_hwirq(d)); + pl061_irq_unmask(d); + return 0; +} + +static void pl061_irq_shutdown(struct irq_data *d) +{ + struct pl061_gpio *chip = irq_data_get_irq_chip_data(d); + + pl061_irq_mask(d); + gpio_unlock_as_irq(&chip->gc, irqd_to_hwirq(d)); +} + static struct irq_chip pl061_irqchip = { .name = "pl061 gpio", .irq_mask = pl061_irq_mask, .irq_unmask = pl061_irq_unmask, .irq_set_type = pl061_irq_type, + .irq_startup = pl061_irq_startup, + .irq_shutdown = pl061_irq_shutdown, }; static int pl061_irq_map(struct irq_domain *d, unsigned int irq, |