1. Patchew
  2. linux
  3. [PATCH V2 0/4] gpio: sprd: Modification of UNISOC Platform EIC Driver
  4. View patch

[PATCH V2 2/4] gpio: sprd: Clear interrupt after set the interrupt type

Wenhua Lin posted 4 patches 2 years, 4 months ago
There is a newer version of this series
[PATCH V2 2/4] gpio: sprd: Clear interrupt after set the interrupt type
Posted by Wenhua Lin 2 years, 4 months ago 
The initialization state of the EIC module is a high level trigger.
If it is currently a high level, the interrupt condition is met at
this time, and the EIC interrupt has a latch capability, which will
cause an interrupt to occur after booting. To avoid this, When setting
the EIC interrupt trigger type, clear the interrupt once.

Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
---
 drivers/gpio/gpio-eic-sprd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index bfa8a4c7515a..96f1c7fd3988 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -375,29 +375,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_EDGE_FALLING:
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
+			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_EDGE_BOTH:
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_LEVEL_HIGH:
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_level_irq);
 			break;
 		case IRQ_TYPE_LEVEL_LOW:
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
 			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
+			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_level_irq);
 			break;
 		default:
@@ -410,29 +415,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_EDGE_FALLING:
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
+			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_EDGE_BOTH:
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_edge_irq);
 			break;
 		case IRQ_TYPE_LEVEL_HIGH:
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
+			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_level_irq);
 			break;
 		case IRQ_TYPE_LEVEL_LOW:
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
 			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
+			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
 			irq_set_handler_locked(data, handle_level_irq);
 			break;
 		default:
-- 
2.17.1
Re: [PATCH V2 2/4] gpio: sprd: Clear interrupt after set the interrupt type
Posted by Baolin Wang 2 years, 4 months ago 

On 9/21/2023 5:00 PM, Wenhua Lin wrote:
> The initialization state of the EIC module is a high level trigger.
> If it is currently a high level, the interrupt condition is met at
> this time, and the EIC interrupt has a latch capability, which will
> cause an interrupt to occur after booting. To avoid this, When setting
> the EIC interrupt trigger type, clear the interrupt once.

With Andy's comments,
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>

> Signed-off-by: Wenhua Lin <Wenhua.Lin@unisoc.com>
> ---
>   drivers/gpio/gpio-eic-sprd.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
> index bfa8a4c7515a..96f1c7fd3988 100644
> --- a/drivers/gpio/gpio-eic-sprd.c
> +++ b/drivers/gpio/gpio-eic-sprd.c
> @@ -375,29 +375,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_EDGE_FALLING:
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
> +			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_EDGE_BOTH:
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_LEVEL_HIGH:
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_level_irq);
>   			break;
>   		case IRQ_TYPE_LEVEL_LOW:
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTMODE, 1);
>   			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTPOL, 0);
> +			sprd_eic_update(chip, offset, SPRD_EIC_ASYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_level_irq);
>   			break;
>   		default:
> @@ -410,29 +415,34 @@ static int sprd_eic_irq_set_type(struct irq_data *data, unsigned int flow_type)
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_EDGE_FALLING:
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
> +			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_EDGE_BOTH:
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_edge_irq);
>   			break;
>   		case IRQ_TYPE_LEVEL_HIGH:
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 1);
> +			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_level_irq);
>   			break;
>   		case IRQ_TYPE_LEVEL_LOW:
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTBOTH, 0);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTMODE, 1);
>   			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTPOL, 0);
> +			sprd_eic_update(chip, offset, SPRD_EIC_SYNC_INTCLR, 1);
>   			irq_set_handler_locked(data, handle_level_irq);
>   			break;
>   		default:
Re: [PATCH V2 2/4] gpio: sprd: Clear interrupt after set the interrupt type
Posted by Andy Shevchenko 2 years, 4 months ago 
On Thu, Sep 21, 2023 at 05:00:25PM +0800, Wenhua Lin wrote:
> The initialization state of the EIC module is a high level trigger.

Here you use EIC, in other places eic. Can you, please, be consistent?

> If it is currently a high level, the interrupt condition is met at
> this time, and the EIC interrupt has a latch capability, which will
> cause an interrupt to occur after booting. To avoid this, When setting
> the EIC interrupt trigger type, clear the interrupt once.

-- 
With Best Regards,
Andy Shevchenko
Re: [PATCH V2 2/4] gpio: sprd: Clear interrupt after set the interrupt type
Posted by wenhua lin 2 years, 1 month ago 
On Thu, Sep 21, 2023 at 7:24 PM Andy Shevchenko <andy@kernel.org> wrote:
>
> On Thu, Sep 21, 2023 at 05:00:25PM +0800, Wenhua Lin wrote:
> > The initialization state of the EIC module is a high level trigger.
>
> Here you use EIC, in other places eic. Can you, please, be consistent?

Thank you very much for your review.
I will fix this issue in patch v3.

>
> > If it is currently a high level, the interrupt condition is met at
> > this time, and the EIC interrupt has a latch capability, which will
> > cause an interrupt to occur after booting. To avoid this, When setting
> > the EIC interrupt trigger type, clear the interrupt once.
>
> --
> With Best Regards,
> Andy Shevchenko
>
>

Patchew 2.1-devel-b67e4c2

© 2016 - 2026 Red Hat, Inc.