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[PATCH v2 4/8] powerpc/85xx: p2020: Move i8259 code into own function

Pali Rohár posted 8 patches 3 years, 1 month ago
There is a newer version of this series
[PATCH v2 4/8] powerpc/85xx: p2020: Move i8259 code into own function
Posted by Pali Rohár 3 years, 1 month ago 
Splits mpic and i8259 initialization codes into separate functions.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 arch/powerpc/platforms/85xx/p2020.c | 37 ++++++++++++++++-------------
 1 file changed, 21 insertions(+), 16 deletions(-)

diff --git a/arch/powerpc/platforms/85xx/p2020.c b/arch/powerpc/platforms/85xx/p2020.c
index d65d4c88ac47..b8584bf307b0 100644
--- a/arch/powerpc/platforms/85xx/p2020.c
+++ b/arch/powerpc/platforms/85xx/p2020.c
@@ -45,6 +45,7 @@
 #ifdef CONFIG_MPC85xx_DS
 
 #ifdef CONFIG_PPC_I8259
+
 static void mpc85xx_8259_cascade(struct irq_desc *desc)
 {
 	struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -55,27 +56,13 @@ static void mpc85xx_8259_cascade(struct irq_desc *desc)
 	}
 	chip->irq_eoi(&desc->irq_data);
 }
-#endif	/* CONFIG_PPC_I8259 */
 
-static void __init mpc85xx_ds_pic_init(void)
+static void __init mpc85xx_8259_init(void)
 {
-	struct mpic *mpic;
-#ifdef CONFIG_PPC_I8259
 	struct device_node *np;
 	struct device_node *cascade_node = NULL;
 	int cascade_irq;
-#endif
-
-	mpic = mpic_alloc(NULL, 0,
-		  MPIC_BIG_ENDIAN |
-		  MPIC_SINGLE_DEST_CPU,
-		0, 256, " OpenPIC  ");
-
-	BUG_ON(mpic == NULL);
-	mpic_init(mpic);
 
-#ifdef CONFIG_PPC_I8259
-	/* Initialize the i8259 controller */
 	for_each_node_by_type(np, "interrupt-controller")
 	    if (of_device_is_compatible(np, "chrp,iic")) {
 		cascade_node = np;
@@ -93,13 +80,31 @@ static void __init mpc85xx_ds_pic_init(void)
 		return;
 	}
 
-	DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
+	DBG("i8259: cascade mapped to irq %d\n", cascade_irq);
 
 	i8259_init(cascade_node, 0);
 	of_node_put(cascade_node);
 
 	irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
+}
+
 #endif	/* CONFIG_PPC_I8259 */
+
+static void __init mpc85xx_ds_pic_init(void)
+{
+	struct mpic *mpic;
+
+	mpic = mpic_alloc(NULL, 0,
+		  MPIC_BIG_ENDIAN |
+		  MPIC_SINGLE_DEST_CPU,
+		0, 256, " OpenPIC  ");
+
+	BUG_ON(mpic == NULL);
+	mpic_init(mpic);
+
+#ifdef CONFIG_PPC_I8259
+	mpc85xx_8259_init();
+#endif
 }
 
 #ifdef CONFIG_PCI
-- 
2.20.1
Re: [PATCH v2 4/8] powerpc/85xx: p2020: Move i8259 code into own function
Posted by Christophe Leroy 2 years, 11 months ago 

Le 24/12/2022 à 22:14, Pali Rohár a écrit :
> Splits mpic and i8259 initialization codes into separate functions.
> 
> Signed-off-by: Pali Rohár <pali@kernel.org>
> ---
>   arch/powerpc/platforms/85xx/p2020.c | 37 ++++++++++++++++-------------
>   1 file changed, 21 insertions(+), 16 deletions(-)
> 
> diff --git a/arch/powerpc/platforms/85xx/p2020.c b/arch/powerpc/platforms/85xx/p2020.c
> index d65d4c88ac47..b8584bf307b0 100644
> --- a/arch/powerpc/platforms/85xx/p2020.c
> +++ b/arch/powerpc/platforms/85xx/p2020.c
> @@ -45,6 +45,7 @@
>   #ifdef CONFIG_MPC85xx_DS
>   
>   #ifdef CONFIG_PPC_I8259
> +
>   static void mpc85xx_8259_cascade(struct irq_desc *desc)
>   {
>   	struct irq_chip *chip = irq_desc_get_chip(desc);
> @@ -55,27 +56,13 @@ static void mpc85xx_8259_cascade(struct irq_desc *desc)
>   	}
>   	chip->irq_eoi(&desc->irq_data);
>   }
> -#endif	/* CONFIG_PPC_I8259 */
>   
> -static void __init mpc85xx_ds_pic_init(void)
> +static void __init mpc85xx_8259_init(void)
>   {
> -	struct mpic *mpic;
> -#ifdef CONFIG_PPC_I8259
>   	struct device_node *np;
>   	struct device_node *cascade_node = NULL;
>   	int cascade_irq;
> -#endif
> -
> -	mpic = mpic_alloc(NULL, 0,
> -		  MPIC_BIG_ENDIAN |
> -		  MPIC_SINGLE_DEST_CPU,
> -		0, 256, " OpenPIC  ");
> -
> -	BUG_ON(mpic == NULL);
> -	mpic_init(mpic);
>   
> -#ifdef CONFIG_PPC_I8259
> -	/* Initialize the i8259 controller */
>   	for_each_node_by_type(np, "interrupt-controller")
>   	    if (of_device_is_compatible(np, "chrp,iic")) {
>   		cascade_node = np;
> @@ -93,13 +80,31 @@ static void __init mpc85xx_ds_pic_init(void)
>   		return;
>   	}
>   
> -	DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
> +	DBG("i8259: cascade mapped to irq %d\n", cascade_irq);
>   
>   	i8259_init(cascade_node, 0);
>   	of_node_put(cascade_node);
>   
>   	irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
> +}
> +
>   #endif	/* CONFIG_PPC_I8259 */
> +
> +static void __init mpc85xx_ds_pic_init(void)
> +{
> +	struct mpic *mpic;
> +
> +	mpic = mpic_alloc(NULL, 0,
> +		  MPIC_BIG_ENDIAN |
> +		  MPIC_SINGLE_DEST_CPU,
> +		0, 256, " OpenPIC  ");
> +
> +	BUG_ON(mpic == NULL);
> +	mpic_init(mpic);
> +
> +#ifdef CONFIG_PPC_I8259

Ca we minimise number of #ifdef CONFIG_PPC_I8259 by using 
IS_ENABLED(CONFIG_PPC_I8259) inside if/else ?

> +	mpc85xx_8259_init();
> +#endif
>   }
>   
>   #ifdef CONFIG_PCI
Re: [PATCH v2 4/8] powerpc/85xx: p2020: Move i8259 code into own function
Posted by Pali Rohár 2 years, 11 months ago 
On Monday 13 February 2023 20:06:27 Christophe Leroy wrote:
> 
> 
> Le 24/12/2022 à 22:14, Pali Rohár a écrit :
> > Splits mpic and i8259 initialization codes into separate functions.
> > 
> > Signed-off-by: Pali Rohár <pali@kernel.org>
> > ---
> >   arch/powerpc/platforms/85xx/p2020.c | 37 ++++++++++++++++-------------
> >   1 file changed, 21 insertions(+), 16 deletions(-)
> > 
> > diff --git a/arch/powerpc/platforms/85xx/p2020.c b/arch/powerpc/platforms/85xx/p2020.c
> > index d65d4c88ac47..b8584bf307b0 100644
> > --- a/arch/powerpc/platforms/85xx/p2020.c
> > +++ b/arch/powerpc/platforms/85xx/p2020.c
> > @@ -45,6 +45,7 @@
> >   #ifdef CONFIG_MPC85xx_DS
> >   
> >   #ifdef CONFIG_PPC_I8259
> > +
> >   static void mpc85xx_8259_cascade(struct irq_desc *desc)
> >   {
> >   	struct irq_chip *chip = irq_desc_get_chip(desc);
> > @@ -55,27 +56,13 @@ static void mpc85xx_8259_cascade(struct irq_desc *desc)
> >   	}
> >   	chip->irq_eoi(&desc->irq_data);
> >   }
> > -#endif	/* CONFIG_PPC_I8259 */
> >   
> > -static void __init mpc85xx_ds_pic_init(void)
> > +static void __init mpc85xx_8259_init(void)
> >   {
> > -	struct mpic *mpic;
> > -#ifdef CONFIG_PPC_I8259
> >   	struct device_node *np;
> >   	struct device_node *cascade_node = NULL;
> >   	int cascade_irq;
> > -#endif
> > -
> > -	mpic = mpic_alloc(NULL, 0,
> > -		  MPIC_BIG_ENDIAN |
> > -		  MPIC_SINGLE_DEST_CPU,
> > -		0, 256, " OpenPIC  ");
> > -
> > -	BUG_ON(mpic == NULL);
> > -	mpic_init(mpic);
> >   
> > -#ifdef CONFIG_PPC_I8259
> > -	/* Initialize the i8259 controller */
> >   	for_each_node_by_type(np, "interrupt-controller")
> >   	    if (of_device_is_compatible(np, "chrp,iic")) {
> >   		cascade_node = np;
> > @@ -93,13 +80,31 @@ static void __init mpc85xx_ds_pic_init(void)
> >   		return;
> >   	}
> >   
> > -	DBG("mpc85xxds: cascade mapped to irq %d\n", cascade_irq);
> > +	DBG("i8259: cascade mapped to irq %d\n", cascade_irq);
> >   
> >   	i8259_init(cascade_node, 0);
> >   	of_node_put(cascade_node);
> >   
> >   	irq_set_chained_handler(cascade_irq, mpc85xx_8259_cascade);
> > +}
> > +
> >   #endif	/* CONFIG_PPC_I8259 */
> > +
> > +static void __init mpc85xx_ds_pic_init(void)
> > +{
> > +	struct mpic *mpic;
> > +
> > +	mpic = mpic_alloc(NULL, 0,
> > +		  MPIC_BIG_ENDIAN |
> > +		  MPIC_SINGLE_DEST_CPU,
> > +		0, 256, " OpenPIC  ");
> > +
> > +	BUG_ON(mpic == NULL);
> > +	mpic_init(mpic);
> > +
> > +#ifdef CONFIG_PPC_I8259
> 
> Ca we minimise number of #ifdef CONFIG_PPC_I8259 by using 
> IS_ENABLED(CONFIG_PPC_I8259) inside if/else ?
> 
> > +	mpc85xx_8259_init();
> > +#endif

Ok, I can change code to:

+if (IS_ENABLED(CONFIG_PPC_I8259))
+    mpc85xx_8259_init();

I guess it should be equivalent.

> >   }
> >   
> >   #ifdef CONFIG_PCI

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