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authorEtienne Carriere <etienne.carriere@st.com>2012-08-22 10:44:16 +0200
committerLinus Walleij <linus.walleij@linaro.org>2012-09-03 13:21:37 +0200
commit4921e7452c2c61e0caa1a5039456cbeed3f10324 (patch)
treea37597b49ed0fd5d6cf0360fe183a51a4b6d9ac0 /drivers/pinctrl
parentd5fff72db1d7cf1161deed54f6be6d2c96f2ad80 (diff)
downloadop-kernel-dev-4921e7452c2c61e0caa1a5039456cbeed3f10324.zip
op-kernel-dev-4921e7452c2c61e0caa1a5039456cbeed3f10324.tar.gz
pinctrl/nomadik: MASK_ON_SUSPEND
ux500 machines performs pins (GPIO) reconfiguration when entering in the suspended mode. This reconfiguration aims at reaching an ultra low power HW configuration. Due to this HW reconfiguration, some HW devices can change of HW state and have their output signals at level that could generate IRQs. If the non-wakeup IRQs are disabled but not yet masked (delayed interrupt disable feature from the generic irq layer), effective interrupts reach the system only because the system attempt to enter the suspended mode. To prevent such IRQs to trig, all irq chips embedded in ux500 platform should enable their IRQCHIP_MASK_ON_SUSPEND flag. Signed-off-by: Etienne Carriere <etienne.carriere@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/pinctrl-nomadik.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-nomadik.c b/drivers/pinctrl/pinctrl-nomadik.c
index d12df02..fae10b3 100644
--- a/drivers/pinctrl/pinctrl-nomadik.c
+++ b/drivers/pinctrl/pinctrl-nomadik.c
@@ -819,6 +819,7 @@ static struct irq_chip nmk_gpio_irq_chip = {
.irq_set_wake = nmk_gpio_irq_set_wake,
.irq_startup = nmk_gpio_irq_startup,
.irq_shutdown = nmk_gpio_irq_shutdown,
+ .flags = IRQCHIP_MASK_ON_SUSPEND,
};
static void __nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc,
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