RE: [PATCH v2] extcon: usbc-tusb320: Set interrupt polarity based on device-tree

["Chanwoo Choi" <cw00.choi@samsung.com>]

> -----Original Message-----
> From: Chanwoo Choi <cw00.choi@samsung.com>
> Sent: Monday, December 4, 2023 9:33 PM
> To: 'Lukas Funke' <lukas.funke-oss@weidmueller.com>; 'lkp@intel.com'
> <lkp@intel.com>; 'MyungJoo Ham' <myungjoo.ham@samsung.com>
> Cc: 'Lukas.Funke@weidmueller.com' <Lukas.Funke@weidmueller.com>; 'linux-
> kernel@vger.kernel.org' <linux-kernel@vger.kernel.org>; 'oe-kbuild-
> all@lists.linux.dev' <oe-kbuild-all@lists.linux.dev>; 'Lukas Funke'
> <lukas.funke@weidmueller.com>
> Subject: RE: [PATCH v2] extcon: usbc-tusb320: Set interrupt polarity based
> on device-tree
> 
> 
> 
> > -----Original Message-----
> > From: Chanwoo Choi <cw00.choi@samsung.com>
> > Sent: Monday, December 4, 2023 9:09 PM
> > To: 'Lukas Funke' <lukas.funke-oss@weidmueller.com>; 'lkp@intel.com'
> > <lkp@intel.com>; 'MyungJoo Ham' <myungjoo.ham@samsung.com>
> > Cc: 'Lukas.Funke@weidmueller.com' <Lukas.Funke@weidmueller.com>;
> > 'linux- kernel@vger.kernel.org' <linux-kernel@vger.kernel.org>;
> > 'oe-kbuild- all@lists.linux.dev' <oe-kbuild-all@lists.linux.dev>; 'Lukas
> Funke'
> > <lukas.funke@weidmueller.com>
> > Subject: RE: [PATCH v2] extcon: usbc-tusb320: Set interrupt polarity
> > based on device-tree
> >
> >
> >
> > > -----Original Message-----
> > > From: Lukas Funke <lukas.funke-oss@weidmueller.com>
> > > Sent: Wednesday, November 22, 2023 5:08 PM
> > > To: lkp@intel.com; MyungJoo Ham <myungjoo.ham@samsung.com>; Chanwoo
> > > Choi <cw00.choi@samsung.com>
> > > Cc: Lukas.Funke@weidmueller.com; linux-kernel@vger.kernel.org;
> > > lukas.funke- oss@weidmueller.com; oe-kbuild-all@lists.linux.dev;
> > > Lukas Funke <lukas.funke@weidmueller.com>
> > > Subject: [PATCH v2] extcon: usbc-tusb320: Set interrupt polarity
> > > based on device-tree
> > >
> > > From: Lukas Funke <Lukas.Funke@weidmueller.com>
> > >
> > > Remove 'IRQF_TRIGGER_FALLING' request which is not allowed on every
> > > interrupt controller (i.e. arm64 GIC). Replace flag by a request
> > > that depends on the actual device-tree setting.
> > >
> > > Reported-by: kernel test robot <lkp@intel.com>
> > > Closes: https://lore.kernel.org/oe-kbuild-all/202311221355.yxYpTIw3-
> > > lkp@intel.com/
> > > Signed-off-by: Lukas Funke <lukas.funke@weidmueller.com>
> > > ---
> > >  drivers/extcon/extcon-usbc-tusb320.c | 13 ++++++++++++-
> > >  1 file changed, 12 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/drivers/extcon/extcon-usbc-tusb320.c
> > > b/drivers/extcon/extcon- usbc-tusb320.c index
> > > 4d08c2123e59..140ab28dbd36 100644
> > > --- a/drivers/extcon/extcon-usbc-tusb320.c
> > > +++ b/drivers/extcon/extcon-usbc-tusb320.c
> > > @@ -17,6 +17,7 @@
> > >  #include <linux/usb/typec.h>
> > >  #include <linux/usb/typec_altmode.h>  #include <linux/usb/role.h>
> > > +#include <linux/irq.h>
> > >
> > >  #define TUSB320_REG8				0x8
> > >  #define TUSB320_REG8_CURRENT_MODE_ADVERTISE	GENMASK(7, 6)
> > > @@ -515,6 +516,8 @@ static int tusb320_probe(struct i2c_client
*client)
> > >  	const void *match_data;
> > >  	unsigned int revision;
> > >  	int ret;
> > > +	int irq_pol;
> > > +	struct irq_data *irq_d;
> > >
> > >  	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
> > >  	if (!priv)
> > > @@ -568,9 +571,17 @@ static int tusb320_probe(struct i2c_client
*client)
> > >  		 */
> > >  		tusb320_state_update_handler(priv, true);
> > >
> > > +	irq_d = irq_get_irq_data(client->irq);
> > > +	if (!irq_d) {
> > > +		dev_err(&client->dev, "Invalid IRQ: %d\n", client->irq);
> > > +		return -ENODEV;
> > > +	}
> > > +
> > > +	irq_pol = irqd_get_trigger_type(irq_d);
> > > +
> > >  	ret = devm_request_threaded_irq(priv->dev, client->irq, NULL,
> > >  					tusb320_irq_handler,
> > > -					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
> > > +					IRQF_ONESHOT | irq_pol,
> > >  					client->name, priv);
> > >  	if (ret)
> > >  		tusb320_typec_remove(priv);
> > > --
> > > 2.30.2
> >
> >
> > Applied it. Thanks.
> >
> >
> > Best Regards,
> > Chanwoo Choi
> 
> 
> In order to remove the build warning, I changed the variable type
> of 'irq_pol' as following:
> 
> 
> index 140ab28dbd36..cec1889549a6 100644
> --- a/drivers/extcon/extcon-usbc-tusb320.c
> +++ b/drivers/extcon/extcon-usbc-tusb320.c
> @@ -516,7 +516,7 @@ static int tusb320_probe(struct i2c_client *client)
>         const void *match_data;
>         unsigned int revision;
>         int ret;
> -       int irq_pol;
> +       u32 irq_pol;
>         struct irq_data *irq_d;
> 
>         priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
> 
> Best Regards,
> Chanwoo Choi


How about changing this patch as following?
When irq_getg_irq_data returns NULL, just use the IRQF_TRIGGER_FALLING flag
to support previous version. Because I didn't' check the all use-case
of this driver on DT. I think that better to keep the IRQF_TRIGGER_FALLING
flag
when irq_d is NULL.


diff --git a/drivers/extcon/extcon-usbc-tusb320.c
b/drivers/extcon/extcon-usbc-tusb320.c
index 4d08c2123e59..bd5ed8dd8fdd 100644
--- a/drivers/extcon/extcon-usbc-tusb320.c
+++ b/drivers/extcon/extcon-usbc-tusb320.c
@@ -17,6 +17,7 @@
 #include <linux/usb/typec.h>
 #include <linux/usb/typec_altmode.h>
 #include <linux/usb/role.h>
+#include <linux/irq.h>
 
 #define TUSB320_REG8				0x8
 #define TUSB320_REG8_CURRENT_MODE_ADVERTISE	GENMASK(7, 6)
@@ -515,6 +516,8 @@ static int tusb320_probe(struct i2c_client *client)
 	const void *match_data;
 	unsigned int revision;
 	int ret;
+	u32 irq_trigger_type;
+	struct irq_data *irq_d;
 
 	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -568,9 +571,15 @@ static int tusb320_probe(struct i2c_client *client)
 		 */
 		tusb320_state_update_handler(priv, true);
 
+	irq_d = irq_get_irq_data(client->irq);
+	if (irq_d)
+		irq_trigger_type = irqd_get_trigger_type(irq_d);
+	else
+		irq_trigger_type = IRQF_TRIGGER_FALLING;
+
 	ret = devm_request_threaded_irq(priv->dev, client->irq, NULL,
 					tusb320_irq_handler,
-					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+					IRQF_ONESHOT | irq_trigger_type,
 					client->name, priv);
 	if (ret)
 		tusb320_typec_remove(priv);
-- 
2.25.1