linux-kernel - [RFC PATCH v1 14/21] ACPI: bus: Add acpi_riscv

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Message-Id: <20230803175916.3174453-15-sunilvl@ventanamicro.com>
Date:   Thu,  3 Aug 2023 23:29:09 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     linux-doc@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-acpi@...r.kernel.org, linux-pci@...r.kernel.org
Cc:     Jonathan Corbet <corbet@....net>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Anup Patel <anup@...infault.org>,
        Marc Zyngier <maz@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Robert Moore <robert.moore@...el.com>,
        Haibo Xu <haibo1.xu@...el.com>,
        Andrew Jones <ajones@...tanamicro.com>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Atish Kumar Patra <atishp@...osinc.com>,
        Sunil V L <sunilvl@...tanamicro.com>
Subject: [RFC PATCH v1 14/21] ACPI: bus: Add acpi_riscv_init function

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@...tanamicro.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@...tanamicro.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