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Date:   Wed, 28 Sep 2022 13:37:22 -0000
From:   "irqchip-bot for Huacai Chen" <tip-bot2@linutronix.de>
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To:     linux-kernel@vger.kernel.org
Subject: [irqchip: irq/irqchip-next] irqchip: Make irqchip_init() usable on
 pure ACPI systems
Cc:     Huacai Chen <chenhuacai@loongson.cn>,
        Tiezhu Yang <yangtiezhu@loongson.cn>,
        Marc Zyngier <maz@kernel.org>, tglx@linutronix.de
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The following commit has been merged into the irq/irqchip-next branch of irqchip:

Commit-ID:     612d5494aef9bd2ab68d585a8c0ac2b16d12d520
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/612d5494aef9bd2ab68d585a8c0ac2b16d12d520
Author:        Huacai Chen <chenhuacai@loongson.cn>
AuthorDate:    Tue, 27 Sep 2022 20:45:57 +08:00
Committer:     Marc Zyngier <maz@kernel.org>
CommitterDate: Wed, 28 Sep 2022 14:11:28 +01:00

irqchip: Make irqchip_init() usable on pure ACPI systems

Pure ACPI systems (e.g., LoongArch) do not need OF_IRQ, but still
require irqchip_init() to perform the ACPI irqchip probing,
even when OF_IRQ isn't selected.

Relax the dependency to enable the generic irqchip support when
ACPI_GENERIC_GSI is configured.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Tested-by: Tiezhu Yang <yangtiezhu@loongson.cn>
[maz: revamped commit message]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220927124557.3246737-1-chenhuacai@loongson.cn
---
 drivers/irqchip/Kconfig | 2 +-
 include/linux/of_irq.h  | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 66b9fa4..93ad04d 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -3,7 +3,7 @@ menu "IRQ chip support"
 
 config IRQCHIP
 	def_bool y
-	depends on OF_IRQ
+	depends on (OF_IRQ || ACPI_GENERIC_GSI)
 
 config ARM_GIC
 	bool
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index 83fccd0..d6d3eae 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -37,9 +37,8 @@ extern unsigned int irq_create_of_mapping(struct of_phandle_args *irq_data);
 extern int of_irq_to_resource(struct device_node *dev, int index,
 			      struct resource *r);
 
-extern void of_irq_init(const struct of_device_id *matches);
-
 #ifdef CONFIG_OF_IRQ
+extern void of_irq_init(const struct of_device_id *matches);
 extern int of_irq_parse_one(struct device_node *device, int index,
 			  struct of_phandle_args *out_irq);
 extern int of_irq_count(struct device_node *dev);
@@ -57,6 +56,9 @@ extern struct irq_domain *of_msi_map_get_device_domain(struct device *dev,
 extern void of_msi_configure(struct device *dev, struct device_node *np);
 u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in);
 #else
+static inline void of_irq_init(const struct of_device_id *matches)
+{
+}
 static inline int of_irq_parse_one(struct device_node *device, int index,
 				   struct of_phandle_args *out_irq)
 {