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| author | Icenowy Zheng <zhengxingda@iscas.ac.cn> | 2026-03-21 12:20:31 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-03-26 18:15:04 +0300 |
| commit | ed3772aa48cf84ae313156cfe6544e8cba5aa043 (patch) | |
| tree | 51c3b2af3cb3958f7d0e3f267e71f8693c91fa50 | |
| parent | 29c10a0af04e9b3eb7b06e72e9f75fccca45205e (diff) | |
| download | linux-ed3772aa48cf84ae313156cfe6544e8cba5aa043.tar.xz | |
irqchip/loongson-pch-lpc: Add OF init code
The OF-based MIPS Loongson-3 systems can also have a PCH LPC interrupt
controller.
Add OF-based initialization code for this driver.
Co-developed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Icenowy Zheng <zhengxingda@iscas.ac.cn>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://patch.msgid.link/20260321092032.3502701-6-zhengxingda@iscas.ac.cn
| -rw-r--r-- | drivers/irqchip/irq-loongson-pch-lpc.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-loongson-pch-lpc.c b/drivers/irqchip/irq-loongson-pch-lpc.c index 2bb6659e9a93..7117ca6fc2f0 100644 --- a/drivers/irqchip/irq-loongson-pch-lpc.c +++ b/drivers/irqchip/irq-loongson-pch-lpc.c @@ -13,6 +13,8 @@ #include <linux/irqchip/chained_irq.h> #include <linux/irqdomain.h> #include <linux/kernel.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> #include <linux/syscore_ops.h> #include "irq-loongson.h" @@ -224,6 +226,7 @@ free_priv: return -ENOMEM; } +#ifdef CONFIG_ACPI int __init pch_lpc_acpi_init(struct irq_domain *parent, struct acpi_madt_lpc_pic *acpi_pchlpc) { struct fwnode_handle *irq_handle; @@ -256,3 +259,35 @@ int __init pch_lpc_acpi_init(struct irq_domain *parent, struct acpi_madt_lpc_pic return 0; } +#endif /* CONFIG_ACPI */ + +#ifdef CONFIG_OF +static int __init pch_lpc_of_init(struct device_node *node, struct device_node *parent) +{ + struct fwnode_handle *irq_handle; + struct resource res; + int parent_irq, ret; + + if (of_address_to_resource(node, 0, &res)) + return -EINVAL; + + parent_irq = irq_of_parse_and_map(node, 0); + if (!parent_irq) { + pr_err("Failed to get the parent IRQ for LPC IRQs\n"); + return -EINVAL; + } + + irq_handle = of_fwnode_handle(node); + + ret = pch_lpc_init(res.start, resource_size(&res), irq_handle, + parent_irq); + if (ret) { + irq_dispose_mapping(parent_irq); + return ret; + } + + return 0; +} + +IRQCHIP_DECLARE(pch_lpc, "loongson,ls7a-lpc", pch_lpc_of_init); +#endif /* CONFIG_OF */ |