linux-kernel - [PATCH v4 1/8] at91: dt: Adds support for the bus matrix declaration in the DT

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Message-Id: <1392199607-27452-2-git-send-email-jjhiblot@traphandler.com>
Date:	Wed, 12 Feb 2014 11:06:40 +0100
From:	Jean-Jacques Hiblot <jjhiblot@...phandler.com>
To:	nicolas.ferre@...el.com, plagnioj@...osoft.com,
	b.brezillon@...rkiz.com
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	gregory.clement@...e-electrons.com,
	Jean-Jacques Hiblot <jjhiblot@...phandler.com>
Subject: [PATCH v4 1/8] at91: dt: Adds support for the bus matrix declaration in the DT

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...phandler.com>
---
 arch/arm/mach-at91/setup.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index f7ca97b..b8d0b66 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -487,6 +487,28 @@ end:
 	of_node_put(np);
 }
 
+static struct of_device_id matrix_ids[] = {
+	{ .compatible = "atmel,at91sam9261-bus-matrix", },
+	{ /*sentinel*/ }
+};
+
+static void at91_dt_matrix(void)
+{
+	struct device_node *np;
+
+	np = of_find_matching_node(NULL, matrix_ids);
+	if (!np) {
+		pr_debug("AT91: unable to find compatible bus matrix controller node in dtb\n");
+		return;
+	}
+
+	at91_matrix_base = of_iomap(np, 0);
+	if (!at91_matrix_base)
+		panic("Impossible to ioremap at91_matrix_base\n");
+
+	of_node_put(np);
+}
+
 void __init at91rm9200_dt_initialize(void)
 {
 	at91_dt_ramc();
@@ -506,6 +528,7 @@ void __init at91_dt_initialize(void)
 	at91_dt_rstc();
 	at91_dt_ramc();
 	at91_dt_shdwc();
+	at91_dt_matrix();
 
 	/* Init clock subsystem */
 	at91_dt_clock_init();
-- 
1.8.5.3

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