linux-kernel - [PATCH 2/4] irqchip/sifive-plic: Improve boot prints for multiple PLIC instances

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Date:   Sat, 16 May 2020 12:08:59 +0530
From:   Anup Patel <anup.patel@....com>
To:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>
Cc:     Atish Patra <atish.patra@....com>,
        Alistair Francis <Alistair.Francis@....com>,
        Anup Patel <anup@...infault.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <anup.patel@....com>
Subject: [PATCH 2/4] irqchip/sifive-plic: Improve boot prints for multiple PLIC instances

We improve PLIC banner to help distinguish multiple PLIC instances
in boot time prints.

Signed-off-by: Anup Patel <anup.patel@....com>
---
 drivers/irqchip/irq-sifive-plic.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 7dc23edb3267..2d3db927a551 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -284,6 +284,11 @@ static int __init plic_init(struct device_node *node,
 	u32 nr_irqs;
 	struct plic_priv *priv;
 	struct plic_handler *handler;
+	struct resource iores;
+
+	error = of_address_to_resource(node, 0, &iores);
+	if (error)
+		return error;
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -377,8 +382,10 @@ static int __init plic_init(struct device_node *node,
 		plic_cpuhp_setup_done = true;
 	}
 
-	pr_info("mapped %d interrupts with %d handlers for %d contexts.\n",
-		nr_irqs, nr_handlers, nr_contexts);
+	pr_info("interrupt-controller at 0x%llx "
+		"(interrupts=%d, contexts=%d, handlers=%d)\n",
+		(unsigned long long)iores.start, nr_irqs,
+		nr_contexts, nr_handlers);
 	set_handle_irq(plic_handle_irq);
 	return 0;
 
-- 
2.25.1