Subject: [PATCH 4/7] powerpc/85xx: p2020: Unify .setup_arch and .init_IRQ callbacks

From: Pali Rohár <[email-masked]>
Date: Fri, 19 Aug 2022 21:15:54 +0200

Make just one .setup_arch and one .init_IRQ callback implementation for all
P2020 board code. This deduplicate repeated and same code.

Signed-off-by: Pali Rohár <[email-masked]>
---
 arch/powerpc/platforms/85xx/p2020.c | 97 +++++++++--------------------
 1 file changed, 30 insertions(+), 67 deletions(-)

diff --git a/arch/powerpc/platforms/85xx/p2020.c b/arch/powerpc/platforms/85xx/p2020.c
index d65d4c88ac47..d327e6c9b838 100644
--- a/arch/powerpc/platforms/85xx/p2020.c
+++ b/arch/powerpc/platforms/85xx/p2020.c
@@ -42,9 +42,8 @@
 #define DBG(fmt, args...)
 #endif
 
-#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);
@@ -55,37 +54,21 @@ 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 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;
 		break;
 	}
 
-	if (cascade_node == NULL) {
-		printk(KERN_DEBUG "Could not find i8259 PIC\n");
+	if (cascade_node == NULL)
 		return;
-	}
 
 	cascade_irq = irq_of_parse_and_map(cascade_node, 0);
 	if (!cascade_irq) {
@@ -93,12 +76,30 @@ 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 p2020_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	/* CONFIG_PPC_I8259 */
 }
 
@@ -138,58 +139,20 @@ static void __init mpc85xx_ds_uli_init(void)
 #endif
 }
 
-#endif /* CONFIG_MPC85xx_DS */
-
-#ifdef CONFIG_MPC85xx_RDB
-static void __init mpc85xx_rdb_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);
-}
-#endif /* CONFIG_MPC85xx_RDB */
-
 /*
  * Setup the architecture
  */
-#ifdef CONFIG_MPC85xx_DS
-static void __init mpc85xx_ds_setup_arch(void)
+static void __init p2020_setup_arch(void)
 {
-	if (ppc_md.progress)
-		ppc_md.progress("mpc85xx_ds_setup_arch()", 0);
-
 	swiotlb_detect_4g();
 	fsl_pci_assign_primary();
 	mpc85xx_ds_uli_init();
 	mpc85xx_smp_init();
 
-	printk("MPC85xx DS board from Freescale Semiconductor\n");
-}
-#endif /* CONFIG_MPC85xx_DS */
-
-#ifdef CONFIG_MPC85xx_RDB
-static void __init mpc85xx_rdb_setup_arch(void)
-{
-	if (ppc_md.progress)
-		ppc_md.progress("mpc85xx_rdb_setup_arch()", 0);
-
-	mpc85xx_smp_init();
-
-	fsl_pci_assign_primary();
-
 #ifdef CONFIG_QUICC_ENGINE
 	mpc85xx_qe_par_io_init();
-#endif	/* CONFIG_QUICC_ENGINE */
-
-	printk(KERN_INFO "MPC85xx RDB board from Freescale Semiconductor\n");
+#endif
 }
-#endif /* CONFIG_MPC85xx_RDB */
 
 #ifdef CONFIG_MPC85xx_DS
 machine_arch_initcall(p2020_ds, mpc85xx_common_publish_devices);
@@ -230,8 +193,8 @@ static int __init p2020_rdb_pc_probe(void)
 define_machine(p2020_ds) {
 	.name			= "P2020 DS",
 	.probe			= p2020_ds_probe,
-	.setup_arch		= mpc85xx_ds_setup_arch,
-	.init_IRQ		= mpc85xx_ds_pic_init,
+	.setup_arch		= p2020_setup_arch,
+	.init_IRQ		= p2020_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
@@ -246,8 +209,8 @@ define_machine(p2020_ds) {
 define_machine(p2020_rdb) {
 	.name			= "P2020 RDB",
 	.probe			= p2020_rdb_probe,
-	.setup_arch		= mpc85xx_rdb_setup_arch,
-	.init_IRQ		= mpc85xx_rdb_pic_init,
+	.setup_arch		= p2020_setup_arch,
+	.init_IRQ		= p2020_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
@@ -260,8 +223,8 @@ define_machine(p2020_rdb) {
 define_machine(p2020_rdb_pc) {
 	.name			= "P2020RDB-PC",
 	.probe			= p2020_rdb_pc_probe,
-	.setup_arch		= mpc85xx_rdb_setup_arch,
-	.init_IRQ		= mpc85xx_rdb_pic_init,
+	.setup_arch		= p2020_setup_arch,
+	.init_IRQ		= p2020_pic_init,
 #ifdef CONFIG_PCI
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 	.pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
-- 
2.20.1