linux-kernel - [PATCH 1/7] irqchip/loongarch-avec: Adjust irqchip driver for 32BIT/64BIT

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Message-ID: <20251223080437.3367240-2-chenhuacai@loongson.cn>
Date: Tue, 23 Dec 2025 16:04:31 +0800
From: Huacai Chen <chenhuacai@...ngson.cn>
To: Thomas Gleixner <tglx@...utronix.de>
Cc: loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Xuefeng Li <lixuefeng@...ngson.cn>,
	Huacai Chen <chenhuacai@...il.com>,
	Jiaxun Yang <jiaxun.yang@...goat.com>,
	Huacai Chen <chenhuacai@...ngson.cn>
Subject: [PATCH 1/7] irqchip/loongarch-avec: Adjust irqchip driver for 32BIT/64BIT

csr_read64() is only available on 64BIT LoongArch platform, so use
recently added adaptive csr_read() instead, so as to make the driver
work on both 32BIT and 64BIT platform.

BTW, make avecintc_enable() be a no-op since it is only needed by 64BIT
platform.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>
---
 drivers/irqchip/irq-loongarch-avec.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/irqchip/irq-loongarch-avec.c b/drivers/irqchip/irq-loongarch-avec.c
index ba556c008cf3..fb8efde95393 100644
--- a/drivers/irqchip/irq-loongarch-avec.c
+++ b/drivers/irqchip/irq-loongarch-avec.c
@@ -58,11 +58,13 @@ struct avecintc_data {
 
 static inline void avecintc_enable(void)
 {
+#ifdef CONFIG_MACH_LOONGSON64
 	u64 value;
 
 	value = iocsr_read64(LOONGARCH_IOCSR_MISC_FUNC);
 	value |= IOCSR_MISC_FUNC_AVEC_EN;
 	iocsr_write64(value, LOONGARCH_IOCSR_MISC_FUNC);
+#endif
 }
 
 static inline void avecintc_ack_irq(struct irq_data *d)
@@ -167,7 +169,7 @@ void complete_irq_moving(void)
 	struct pending_list *plist = this_cpu_ptr(&pending_list);
 	struct avecintc_data *adata, *tdata;
 	int cpu, vector, bias;
-	uint64_t isr;
+	unsigned long isr;
 
 	guard(raw_spinlock)(&loongarch_avec.lock);
 
@@ -177,16 +179,16 @@ void complete_irq_moving(void)
 		bias = vector / VECTORS_PER_REG;
 		switch (bias) {
 		case 0:
-			isr = csr_read64(LOONGARCH_CSR_ISR0);
+			isr = csr_read(LOONGARCH_CSR_ISR0);
 			break;
 		case 1:
-			isr = csr_read64(LOONGARCH_CSR_ISR1);
+			isr = csr_read(LOONGARCH_CSR_ISR1);
 			break;
 		case 2:
-			isr = csr_read64(LOONGARCH_CSR_ISR2);
+			isr = csr_read(LOONGARCH_CSR_ISR2);
 			break;
 		case 3:
-			isr = csr_read64(LOONGARCH_CSR_ISR3);
+			isr = csr_read(LOONGARCH_CSR_ISR3);
 			break;
 		}
 
@@ -234,7 +236,7 @@ static void avecintc_irq_dispatch(struct irq_desc *desc)
 	chained_irq_enter(chip, desc);
 
 	while (true) {
-		unsigned long vector = csr_read64(LOONGARCH_CSR_IRR);
+		unsigned long vector = csr_read(LOONGARCH_CSR_IRR);
 		if (vector & IRR_INVALID_MASK)
 			break;
 
-- 
2.47.3