linux-kernel - [PATCH 1/1] irqchip: stm32-exti: add domain translate function

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Date:   Fri, 11 Jan 2019 14:58:52 +0100
From:   Loic Pallardy <loic.pallardy@...com>
To:     <tglx@...utronix.de>, <jason@...edaemon.net>,
        <marc.zyngier@....com>, <mcoquelin.stm32@...il.com>,
        <alexandre.torgue@...com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Loic Pallardy <loic.pallardy@...com>
Subject: [PATCH 1/1] irqchip: stm32-exti: add domain translate function

Domain translate function is needed to recover irq
configuration parameters from DT node

Signed-off-by: Loic Pallardy <loic.pallardy@...com>
---
 drivers/irqchip/irq-stm32-exti.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 6edfd4bfa169..717879028cc4 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -819,9 +819,27 @@ static int __init stm32_exti_init(const struct stm32_exti_drv_data *drv_data,
 	return ret;
 }
 
+static int stm32_exti_h_translate(struct irq_domain *d,
+				  struct irq_fwspec *fwspec,
+				  unsigned long *out_hwirq,
+				  unsigned int *out_type)
+{
+	if (is_of_node(fwspec->fwnode)) {
+		if (fwspec->param_count != 2)
+			return -EINVAL;
+
+		*out_hwirq = fwspec->param[0];
+		*out_type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK;
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
 static const struct irq_domain_ops stm32_exti_h_domain_ops = {
 	.alloc	= stm32_exti_h_domain_alloc,
 	.free	= irq_domain_free_irqs_common,
+	.translate = stm32_exti_h_translate,
 };
 
 static int
-- 
2.7.4