| Message ID | 20210602110445.33536-4-krzysztof.kozlowski@canonical.com |
|---|---|
| State | New |
| Headers | show |
| Series | None | expand |
On Wed, 02 Jun 2021, Krzysztof Kozlowski wrote: > From: Krzysztof Kozlowski <krzk@kernel.org> > > Interrupt line can be configured on different hardware in different way, > even inverted. Therefore driver should not enforce specific trigger > type - edge falling - but instead rely on Devicetree to configure it. > > The Maxim 14577/77836 datasheets describe the interrupt line as active > low with a requirement of acknowledge from the CPU therefore the edge > falling is not correct. > > The interrupt line is shared between PMIC and charger driver, so using > level sensitive interrupt is here especially important to avoid races. > With an edge configuration in case if first PMIC signals interrupt > followed shortly after by the RTC, the interrupt might not be yet > cleared/acked thus the second one would not be noticed. > > Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> > Acked-by: Rob Herring <robh@kernel.org> > > --- > > Changes since v1: > 1. Add Ack > --- > Documentation/devicetree/bindings/mfd/max14577.txt | 4 ++-- > drivers/mfd/max14577.c | 6 +++--- > 2 files changed, 5 insertions(+), 5 deletions(-) Applied, thanks. -- Lee Jones [李琼斯] Senior Technical Lead - Developer Services Linaro.org │ Open source software for Arm SoCs Follow Linaro: Facebook | Twitter | Blog
diff --git a/Documentation/devicetree/bindings/mfd/max14577.txt b/Documentation/devicetree/bindings/mfd/max14577.txt index 92070b346756..be11943a0560 100644 --- a/Documentation/devicetree/bindings/mfd/max14577.txt +++ b/Documentation/devicetree/bindings/mfd/max14577.txt @@ -71,7 +71,7 @@ max14577@25 { compatible = "maxim,max14577"; reg = <0x25>; interrupt-parent = <&gpx1>; - interrupts = <5 IRQ_TYPE_NONE>; + interrupts = <5 IRQ_TYPE_LEVEL_LOW>; muic: max14577-muic { compatible = "maxim,max14577-muic"; @@ -106,7 +106,7 @@ max77836@25 { compatible = "maxim,max77836"; reg = <0x25>; interrupt-parent = <&gpx1>; - interrupts = <5 IRQ_TYPE_NONE>; + interrupts = <5 IRQ_TYPE_LEVEL_LOW>; muic: max77836-muic { compatible = "maxim,max77836-muic"; diff --git a/drivers/mfd/max14577.c b/drivers/mfd/max14577.c index be185e9d5f16..6c487fa14e9c 100644 --- a/drivers/mfd/max14577.c +++ b/drivers/mfd/max14577.c @@ -332,7 +332,7 @@ static int max77836_init(struct max14577 *max14577) } ret = regmap_add_irq_chip(max14577->regmap_pmic, max14577->irq, - IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED, + IRQF_ONESHOT | IRQF_SHARED, 0, &max77836_pmic_irq_chip, &max14577->irq_data_pmic); if (ret != 0) { @@ -418,14 +418,14 @@ static int max14577_i2c_probe(struct i2c_client *i2c, irq_chip = &max77836_muic_irq_chip; mfd_devs = max77836_devs; mfd_devs_size = ARRAY_SIZE(max77836_devs); - irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED; + irq_flags = IRQF_ONESHOT | IRQF_SHARED; break; case MAXIM_DEVICE_TYPE_MAX14577: default: irq_chip = &max14577_irq_chip; mfd_devs = max14577_devs; mfd_devs_size = ARRAY_SIZE(max14577_devs); - irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT; + irq_flags = IRQF_ONESHOT; break; }