[RFC PATCH v1 14/21] ACPI: bus: Add acpi_riscv_init function

Sunil V L
2023-08-03T18:01:31Z

Add a new function for RISC-V to do any architecture
specific initialization. This function will be used
to create platform devices like APLIC, IMSIC MSI controller,
RISC-V IOMMU etc.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
---
drivers/acpi/bus.c | 1 +
drivers/acpi/riscv/Makefile | 2 +-
drivers/acpi/riscv/init.c | 12 ++++++++++++
include/linux/acpi.h | 6 ++++++
4 files changed, 20 insertions(+), 1 deletion(-)
create mode 100644 drivers/acpi/riscv/init.c

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 2fc2b43a4ed3..9a8c16170a4b 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -1388,6 +1388,7 @@ static int __init acpi_init(void)

pci_mmcfg_late_init();
acpi_arm_init();
+ acpi_riscv_init();
acpi_viot_early_init();
acpi_hest_init();
acpi_ghes_init();
diff --git a/drivers/acpi/riscv/Makefile b/drivers/acpi/riscv/Makefile
index 8b664190d172..3433a19c421d 100644
--- a/drivers/acpi/riscv/Makefile
+++ b/drivers/acpi/riscv/Makefile
@@ -1,2 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
-obj-y += rhct.o irqchip.o
+obj-y += rhct.o irqchip.o init.o
diff --git a/drivers/acpi/riscv/init.c b/drivers/acpi/riscv/init.c
new file mode 100644
index 000000000000..b5807bbdb171
--- /dev/null
+++ b/drivers/acpi/riscv/init.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023, Ventana Micro Systems Inc
+ * Author: Sunil V L <sunilvl@ventanamicro.com>
+ *
+ */
+
+#include <linux/acpi.h>
+
+void __init acpi_riscv_init(void)
+{
+}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 641dc4843987..d16739928888 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -1511,6 +1511,12 @@ void acpi_arm_init(void);
static inline void acpi_arm_init(void) { }
#endif

+#ifdef CONFIG_RISCV
+void acpi_riscv_init(void);
+#else
+static inline void acpi_riscv_init(void) { }
+#endif
+
#ifdef CONFIG_ACPI_PCC
void acpi_init_pcc(void);
#else
--
2.39.2