* [PATCH] regmap: irq: Make IRQ type support optional
@ 2018-12-28 11:23 Charles Keepax
2018-12-28 11:55 ` Charles Keepax
0 siblings, 1 reply; 4+ messages in thread
From: Charles Keepax @ 2018-12-28 11:23 UTC (permalink / raw)
To: broonie; +Cc: linux-kernel, patches
Currently only gpio-max77620 is using the type support in regmap IRQ,
but the implementation causes the irq_set_type operation to fail on all
other regmap IRQ chips. Avoid these regressions by skipping the type
handling on any chips that don't define a set of supported types.
Fixes: 1c2928e3e321 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
drivers/base/regmap/regmap-irq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 1bd1145ad8b5e..8c674f1ad0fc8 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -257,6 +257,9 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
int reg;
const struct regmap_irq_type *t = &irq_data->type;
+ if (!t->types_supported)
+ return 0;
+
if ((t->types_supported & type) != type)
return -ENOTSUPP;
--
2.11.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] regmap: irq: Make IRQ type support optional
2018-12-28 11:23 [PATCH] regmap: irq: Make IRQ type support optional Charles Keepax
@ 2018-12-28 11:55 ` Charles Keepax
2018-12-28 12:16 ` Vaittinen, Matti
0 siblings, 1 reply; 4+ messages in thread
From: Charles Keepax @ 2018-12-28 11:55 UTC (permalink / raw)
To: broonie, matti.vaittinen; +Cc: linux-kernel, patches
On Fri, Dec 28, 2018 at 11:23:58AM +0000, Charles Keepax wrote:
> Currently only gpio-max77620 is using the type support in regmap IRQ,
> but the implementation causes the irq_set_type operation to fail on all
> other regmap IRQ chips. Avoid these regressions by skipping the type
> handling on any chips that don't define a set of supported types.
>
> Fixes: 1c2928e3e321 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> ---
> drivers/base/regmap/regmap-irq.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
> index 1bd1145ad8b5e..8c674f1ad0fc8 100644
> --- a/drivers/base/regmap/regmap-irq.c
> +++ b/drivers/base/regmap/regmap-irq.c
> @@ -257,6 +257,9 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
> int reg;
> const struct regmap_irq_type *t = &irq_data->type;
>
> + if (!t->types_supported)
> + return 0;
> +
> if ((t->types_supported & type) != type)
> return -ENOTSUPP;
>
> --
> 2.11.0
+ Matti Vaittinen, apologies for forgetting to include you on the
original sending.
Thanks,
Charles
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH] regmap: irq: Make IRQ type support optional
2018-12-28 11:55 ` Charles Keepax
@ 2018-12-28 12:16 ` Vaittinen, Matti
2019-01-03 17:22 ` Charles Keepax
0 siblings, 1 reply; 4+ messages in thread
From: Vaittinen, Matti @ 2018-12-28 12:16 UTC (permalink / raw)
To: Charles Keepax, broonie; +Cc: linux-kernel, patches
Hello Charles,
Sending this mail form outlook web interface - so I won't inline any code :/
From: Charles Keepax [ckeepax@opensource.cirrus.com]
Sent: Friday, December 28, 2018 1:55 PM
> On Fri, Dec 28, 2018 at 11:23:58AM +0000, Charles Keepax wrote:
> > Currently only gpio-max77620 is using the type support in regmap IRQ,
> > but the implementation causes the irq_set_type operation to fail on all
> > other regmap IRQ chips. Avoid these regressions by skipping the type
> > handling on any chips that don't define a set of supported types.
> >
> > Fixes: 1c2928e3e321 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
> > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > ---
> > drivers/base/regmap/regmap-irq.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
> > index 1bd1145ad8b5e..8c674f1ad0fc8 100644
> > --- a/drivers/base/regmap/regmap-irq.c
> > +++ b/drivers/base/regmap/regmap-irq.c
> > @@ -257,6 +257,9 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
> > int reg;
> > const struct regmap_irq_type *t = &irq_data->type;
> >
> > + if (!t->types_supported)
> > + return 0;
> > +
> > if ((t->types_supported & type) != type)
> > return -ENOTSUPP;
> >
I got the bug-report from Geert and sent this patch yesterday:
https://lore.kernel.org/lkml/20181227084443.GA23991@localhost.localdomain/
Looking at these two options, I wonder if we shuld return -ENOTSUPP if we do support type setting, but for example only for edge, not level active IRQs - and if LEVEL_LOW or LEVEL_HIGH is requested? Well, I have no strong opinion and both of these should fix the regressions - sorry for the hassle!
I still wonder whether we should do as I suggested and only set the irq_set_type callback for chips which have non zero type_registers? I suggested that here:
https://lore.kernel.org/lkml/20181228080533.GC2461@localhost.localdomain/
> + Matti Vaittinen, apologies for forgetting to include you on the
> original sending.
No problem. Thanks for adding me now =)
Br,
Matti Vaittinen
--
Matti Vaittinen
ROHM Semiconductors
~~~ "I don't think so," said Rene Descartes. Just then, he vanished ~~~
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] regmap: irq: Make IRQ type support optional
2018-12-28 12:16 ` Vaittinen, Matti
@ 2019-01-03 17:22 ` Charles Keepax
0 siblings, 0 replies; 4+ messages in thread
From: Charles Keepax @ 2019-01-03 17:22 UTC (permalink / raw)
To: Vaittinen, Matti; +Cc: broonie, linux-kernel, patches
On Fri, Dec 28, 2018 at 12:16:17PM +0000, Vaittinen, Matti wrote:
> Hello Charles,
>
> Sending this mail form outlook web interface - so I won't inline any code :/
>
> From: Charles Keepax [ckeepax@opensource.cirrus.com]
> Sent: Friday, December 28, 2018 1:55 PM
>
> > On Fri, Dec 28, 2018 at 11:23:58AM +0000, Charles Keepax wrote:
> > > Currently only gpio-max77620 is using the type support in regmap IRQ,
> > > but the implementation causes the irq_set_type operation to fail on all
> > > other regmap IRQ chips. Avoid these regressions by skipping the type
> > > handling on any chips that don't define a set of supported types.
> > >
> > > Fixes: 1c2928e3e321 ("regmap: regmap-irq/gpio-max77620: add level-irq support")
> > > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > > ---
> > > drivers/base/regmap/regmap-irq.c | 3 +++
> > > 1 file changed, 3 insertions(+)
> > >
> > > diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
> > > index 1bd1145ad8b5e..8c674f1ad0fc8 100644
> > > --- a/drivers/base/regmap/regmap-irq.c
> > > +++ b/drivers/base/regmap/regmap-irq.c
> > > @@ -257,6 +257,9 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
> > > int reg;
> > > const struct regmap_irq_type *t = &irq_data->type;
> > >
> > > + if (!t->types_supported)
> > > + return 0;
> > > +
> > > if ((t->types_supported & type) != type)
> > > return -ENOTSUPP;
> > >
>
> I got the bug-report from Geert and sent this patch yesterday:
> https://lore.kernel.org/lkml/20181227084443.GA23991@localhost.localdomain/
>
> Looking at these two options, I wonder if we shuld return
> -ENOTSUPP if we do support type setting, but for example
> only for edge, not level active IRQs - and if LEVEL_LOW or
> LEVEL_HIGH is requested? Well, I have no strong opinion and
> both of these should fix the regressions - sorry for the hassle!
>
> I still wonder whether we should do as I suggested and only
> set the irq_set_type callback for chips which have non zero
> type_registers? I suggested that here:
> https://lore.kernel.org/lkml/20181228080533.GC2461@localhost.localdomain/
>
Yeah that does look like probably the best solution.
Thanks,
Charles
^ permalink raw reply [flat|nested] 4+ messages in thread
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2018-12-28 11:23 [PATCH] regmap: irq: Make IRQ type support optional Charles Keepax
2018-12-28 11:55 ` Charles Keepax
2018-12-28 12:16 ` Vaittinen, Matti
2019-01-03 17:22 ` Charles Keepax
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