[PATCH v5 09/13] powerpc/85xx: mpc85xx_ds: Move i8259 code into own file

Pali Rohár
2023-04-08T14:03:09Z

In order to share mpc85xx i8259 code between DS and P2020.
Prefix i8259 debug and error messages by i8259 word.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

---
Changes in v5:
* Add prefix for err/dbg messages
* Fix commit message
* Reduce includes
---
arch/powerpc/platforms/85xx/Makefile | 3 +-
arch/powerpc/platforms/85xx/mpc85xx.h | 6 +++
arch/powerpc/platforms/85xx/mpc85xx_8259.c | 63 ++++++++++++++++++++++
arch/powerpc/platforms/85xx/mpc85xx_ds.c | 46 ----------------
4 files changed, 71 insertions(+), 47 deletions(-)
create mode 100644 arch/powerpc/platforms/85xx/mpc85xx_8259.c

diff --git a/arch/powerpc/platforms/85xx/Makefile b/arch/powerpc/platforms/85xx/Makefile
index 93451850ed83..0a0011e8c63c 100644
--- a/arch/powerpc/platforms/85xx/Makefile
+++ b/arch/powerpc/platforms/85xx/Makefile
@@ -16,7 +16,8 @@ obj-$(CONFIG_MPC8540_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC8560_ADS) += mpc85xx_ads.o
obj-$(CONFIG_MPC85xx_CDS) += mpc85xx_cds.o
obj-$(CONFIG_MPC8536_DS) += mpc8536_ds.o
-obj-$(CONFIG_MPC85xx_DS) += mpc85xx_ds.o p2020.o
+obj8259-$(CONFIG_PPC_I8259) += mpc85xx_8259.o
+obj-$(CONFIG_MPC85xx_DS) += mpc85xx_ds.o p2020.o $(obj8259-y)
obj-$(CONFIG_MPC85xx_MDS) += mpc85xx_mds.o
obj-$(CONFIG_MPC85xx_RDB) += mpc85xx_rdb.o p2020.o
obj-$(CONFIG_P1010_RDB) += p1010rdb.o
diff --git a/arch/powerpc/platforms/85xx/mpc85xx.h b/arch/powerpc/platforms/85xx/mpc85xx.h
index 8f7b37c1de87..e792907ee3d5 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx.h
+++ b/arch/powerpc/platforms/85xx/mpc85xx.h
@@ -15,6 +15,12 @@ extern void mpc85xx_qe_par_io_init(void);
static inline void __init mpc85xx_qe_par_io_init(void) {}
#endif

+#ifdef CONFIG_PPC_I8259
+void __init mpc85xx_8259_init(void);
+#else
+static inline void __init mpc85xx_8259_init(void) {}
+#endif
+
void __init mpc85xx_ds_pic_init(void);
void __init mpc85xx_ds_setup_arch(void);
void __init mpc85xx_rdb_setup_arch(void);
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_8259.c b/arch/powerpc/platforms/85xx/mpc85xx_8259.c
new file mode 100644
index 000000000000..82e881606049
--- /dev/null
+++ b/arch/powerpc/platforms/85xx/mpc85xx_8259.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MPC85xx 8259 functions for DS Board Setup
+ *
+ * Author Xianghua Xiao (x.xiao@freescale.com)
+ * Roy Zang <tie-fei.zang@freescale.com>
+ * - Add PCI/PCI Exprees support
+ * Copyright 2007 Freescale Semiconductor Inc.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#include <asm/mpic.h>
+#include <asm/i8259.h>
+
+#include "mpc85xx.h"
+
+static void mpc85xx_8259_cascade(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned int cascade_irq = i8259_irq();
+
+ if (cascade_irq) {
+ generic_handle_irq(cascade_irq);
+ }
+ chip->irq_eoi(&desc->irq_data);
+}
+
+void __init mpc85xx_8259_init(void)
+{
+ struct device_node *np;
+ struct device_node *cascade_node = NULL;
+ int cascade_irq;
+
+ /* 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) {
+ pr_debug("i8259: Could not find i8259 PIC\n");
+ return;
+ }
+
+ cascade_irq = irq_of_parse_and_map(cascade_node, 0);
+ if (!cascade_irq) {
+ pr_err("i8259: Failed to map cascade interrupt\n");
+ return;
+ }
+
+ pr_debug("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);
+}
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ds.c b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
index af2cafec4f0a..db4cf76c0fd1 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ds.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ds.c
@@ -34,52 +34,6 @@

#include "mpc85xx.h"

-static void mpc85xx_8259_cascade(struct irq_desc *desc)
-{
- struct irq_chip *chip = irq_desc_get_chip(desc);
- unsigned int cascade_irq = i8259_irq();
-
- if (cascade_irq) {
- generic_handle_irq(cascade_irq);
- }
- chip->irq_eoi(&desc->irq_data);
-}
-
-static void __init mpc85xx_8259_init(void)
-{
- struct device_node *np;
- struct device_node *cascade_node = NULL;
- int cascade_irq;
-
- if (!IS_ENABLED(CONFIG_PPC_I8259))
- return;
-
- /* 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) {
- pr_debug("Could not find i8259 PIC\n");
- return;
- }
-
- cascade_irq = irq_of_parse_and_map(cascade_node, 0);
- if (!cascade_irq) {
- pr_err("Failed to map cascade interrupt\n");
- return;
- }
-
- pr_debug("mpc85xxds: 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);
-}
-
void __init mpc85xx_ds_pic_init(void)
{
struct mpic *mpic;
--
2.20.1