linux-kernel - [PATCH 1/5] irqchip/atmel-aic5: add support for sam9x60 rtt fixup

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Date:   Fri, 10 Apr 2020 19:26:55 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <a.zummo@...ertech.it>, <alexandre.belloni@...tlin.com>,
        <robh+dt@...nel.org>, <mark.rutland@....com>,
        <nicolas.ferre@...rochip.com>, <ludovic.desroches@...rochip.com>,
        <tglx@...utronix.de>, <jason@...edaemon.net>, <maz@...nel.org>
CC:     <linux-rtc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH 1/5] irqchip/atmel-aic5: add support for sam9x60 rtt fixup

Add support for SAM9X60 RTT fixup.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 drivers/irqchip/irq-atmel-aic-common.c | 36 +++++++++++++++++++++-------------
 drivers/irqchip/irq-atmel-aic5.c       |  8 +++++++-
 2 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index 072bd227b6c6..e8681133162b 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -169,21 +169,29 @@ void __init aic_common_rtt_irq_fixup(void)
 {
 	struct device_node *np;
 	void __iomem *regs;
+	static const  struct of_device_id aic_rtt_fixup_ids[] = {
+		{ .compatible = "atmel,at91sam9260-rtt", },
+		{ .compatible = "microchip,sam9x60-rtt", },
+	};
+	int i;
 
-	/*
-	 * The at91sam9263 SoC has 2 instances of the RTT block, hence we
-	 * iterate over the DT to find each occurrence.
-	 */
-	for_each_compatible_node(np, NULL, "atmel,at91sam9260-rtt") {
-		regs = of_iomap(np, 0);
-		if (!regs)
-			continue;
-
-		writel(readl(regs + AT91_RTT_MR) &
-		       ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN),
-		       regs + AT91_RTT_MR);
-
-		iounmap(regs);
+	for (i = 0; i < ARRAY_SIZE(aic_rtt_fixup_ids); i++) {
+		/*
+		 * The at91sam9263 SoC has 2 instances of the RTT block, hence
+		 * we iterate over the DT to find each occurrence.
+		 */
+		for_each_compatible_node(np, NULL,
+					 aic_rtt_fixup_ids[i].compatible) {
+			regs = of_iomap(np, 0);
+			if (!regs)
+				continue;
+
+			writel(readl(regs + AT91_RTT_MR) &
+			       ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN),
+			       regs + AT91_RTT_MR);
+
+			iounmap(regs);
+		}
 	}
 }
 
diff --git a/drivers/irqchip/irq-atmel-aic5.c b/drivers/irqchip/irq-atmel-aic5.c
index 29333497ba10..74a66cd05553 100644
--- a/drivers/irqchip/irq-atmel-aic5.c
+++ b/drivers/irqchip/irq-atmel-aic5.c
@@ -310,10 +310,16 @@ static void __init sama5d3_aic_irq_fixup(void)
 	aic_common_rtc_irq_fixup();
 }
 
+static void __init sam9x60_aic_irq_fixup(void)
+{
+	aic_common_rtc_irq_fixup();
+	aic_common_rtt_irq_fixup();
+}
+
 static const struct of_device_id aic5_irq_fixups[] __initconst = {
 	{ .compatible = "atmel,sama5d3", .data = sama5d3_aic_irq_fixup },
 	{ .compatible = "atmel,sama5d4", .data = sama5d3_aic_irq_fixup },
-	{ .compatible = "microchip,sam9x60", .data = sama5d3_aic_irq_fixup },
+	{ .compatible = "microchip,sam9x60", .data = sam9x60_aic_irq_fixup },
 	{ /* sentinel */ },
 };
 
-- 
2.7.4