From: Jianmin Lv <lvjianmin@loongson.cn>
To: Thomas Gleixner <tglx@linutronix.de>, Marc Zyngier <maz@kernel.org>
Cc: linux-kernel@vger.kernel.org, loongarch@lists.linux.dev,
Jiaxun Yang <jiaxun.yang@flygoat.com>,
Huacai Chen <chenhuacai@loongson.cn>,
Bjorn Helgaas <bhelgaas@google.com>, Len Brown <lenb@kernel.org>,
rafael@kernel.org, linux-pci@vger.kernel.org,
linux-acpi@vger.kernel.org
Subject: [PATCH V3 1/4] ACPI / PCI: fix LPIC irq model default PCI IRQ polarity
Date: Sun, 9 Oct 2022 14:44:28 +0800 [thread overview]
Message-ID: <20221009064431.18839-2-lvjianmin@loongson.cn> (raw)
In-Reply-To: <20221009064431.18839-1-lvjianmin@loongson.cn>
On LoongArch ACPI based systems, the irq trigger type of PCI devices
is high level, so high level triggered type is required to pass
to acpi_register_gsi when create irq mapping for PCI devices.
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
---
drivers/acpi/pci_irq.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index 08e15774fb9f..ff30ceca2203 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -387,13 +387,15 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
u8 pin;
int triggering = ACPI_LEVEL_SENSITIVE;
/*
- * On ARM systems with the GIC interrupt model, level interrupts
+ * On ARM systems with the GIC interrupt model, or LoongArch
+ * systems with the LPIC interrupt model, level interrupts
* are always polarity high by specification; PCI legacy
* IRQs lines are inverted before reaching the interrupt
* controller and must therefore be considered active high
* as default.
*/
- int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ?
+ int polarity = acpi_irq_model == ACPI_IRQ_MODEL_GIC ||
+ acpi_irq_model == ACPI_IRQ_MODEL_LPIC ?
ACPI_ACTIVE_HIGH : ACPI_ACTIVE_LOW;
char *link = NULL;
char link_desc[16];
--
2.31.1
next prev parent reply other threads:[~2022-10-09 6:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-09 6:44 [PATCH V3 0/4] irqchip: Support to set irq type for ACPI path Jianmin Lv
2022-10-09 6:44 ` Jianmin Lv [this message]
2022-10-19 16:05 ` [PATCH V3 1/4] ACPI / PCI: fix LPIC irq model default PCI IRQ polarity Bjorn Helgaas
2022-10-20 3:16 ` Jianmin Lv
2022-10-09 6:44 ` [PATCH V3 2/4] irqchip/loongson-pch-pic: fix translate callback for DT path Jianmin Lv
2022-10-09 6:44 ` [PATCH V3 3/4] irqchip/loongson-pch-pic: Support to set irq type for ACPI path Jianmin Lv
2022-10-09 6:44 ` [PATCH V3 4/4] irqchip/loongson-liointc: " Jianmin Lv
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