[PATCH v3 4/8] powerpc/85xx: p2020: Move i8259 code into own function

[Pali Rohár]

Splits mpic and i8259 initialization codes into separate functions.
Use 'if (IS_ENABLED(CONFIG_PPC_I8259))' instead of '#ifdef CONFIG_PPC_I8259'.

Signed-off-by: Pali Rohár <p...@kernel.org>
---
 arch/powerpc/platforms/85xx/p2020.c | 36 ++++++++++++++---------------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/powerpc/platforms/85xx/p2020.c 
b/arch/powerpc/platforms/85xx/p2020.c
index d65d4c88ac47..1cc468dc4caf 100644
--- a/arch/powerpc/platforms/85xx/p2020.c
+++ b/arch/powerpc/platforms/85xx/p2020.c
@@ -44,7 +44,6 @@
 
 #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 +54,13 @@ 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 +78,28 @@ 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);
+
+       if (IS_ENABLED(CONFIG_PPC_I8259))
+               mpc85xx_8259_init();
 }
 
 #ifdef CONFIG_PCI
-- 
2.20.1