linux-kernel - [PATCH RESEND 04/18] AT91: Rework ramc mapping code

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Message-Id: <1404398493-28907-5-git-send-email-maxime.ripard@free-electrons.com>
Date:	Thu,  3 Jul 2014 16:41:19 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	linux@...im.org.za, Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	dwmw2@...radead.org, dbaryshkov@...il.com
Cc:	Boris Brezillon <boris@...e-electrons.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Thomas Petazzoni <thomas@...e-electrons.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Maxime Ripard <maxime.ripard@...e-electrons.com>
Subject: [PATCH RESEND 04/18] AT91: Rework ramc mapping code

Adapt the ramc mapping code to handle multiple ram controllers in the DT.

Signed-off-by: Maxime Ripard <maxime.ripard@...e-electrons.com>
---
 arch/arm/mach-at91/setup.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index 9c4c7fb323fb..cc520596f23b 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -393,24 +393,26 @@ static void at91_dt_ramc(void)
 {
 	struct device_node *np;
 	const struct of_device_id *of_id;
+	int idx = 0;
 
-	np = of_find_matching_node(NULL, ramc_ids);
-	if (!np)
-		panic(pr_fmt("unable to find compatible ram controller node in dtb\n"));
+	for_each_matching_node(np, ramc_ids) {
+		at91_ramc_base[idx] = of_iomap(np, 0);
+		if (!at91_ramc_base[idx])
+			panic(pr_fmt("unable to map ramc[%d] cpu registers\n"), idx);
 
-	at91_ramc_base[0] = of_iomap(np, 0);
-	if (!at91_ramc_base[0])
-		panic(pr_fmt("unable to map ramc[0] cpu registers\n"));
-	/* the controller may have 2 banks */
-	at91_ramc_base[1] = of_iomap(np, 1);
+		idx++;
+	}
+
+	if (!idx)
+		panic(pr_fmt("unable to find compatible ram controller node in dtb\n"));
 
 	of_id = of_match_node(ramc_ids, np);
-	if (!of_id)
+	if (!of_id) {
 		pr_warn("ramc no standby function available\n");
-	else
-		at91_pm_set_standby(of_id->data);
+		return;
+	}
 
-	of_node_put(np);
+	at91_pm_set_standby(of_id->data);
 }
 
 static struct of_device_id shdwc_ids[] = {
-- 
2.0.1

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