linux-kernel - [PATCH 2/2] ARM: davinci: da850: configure CS2(aemif) for norflash

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Date:	Tue, 29 Jan 2013 10:49:56 +0530
From:	"Kumar, Anil" <anilkumar.v@...com>
To:	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	<davinci-linux-open-source@...ux.davincidsp.com>
CC:	<b-cousson@...com>, <tony@...mide.com>,
	<grant.likely@...retlab.ca>, <rob.herring@...xeda.com>,
	<linux@....linux.org.uk>, <nsekhar@...com>,
	<khilman@...prootsystems.com>, <hs@...x.de>, <anilkumar.v@...com>
Subject: [PATCH 2/2] ARM: davinci: da850: configure CS2(aemif) for norflash

Configure 16 bit data bus width for CS2(aemif) to use the norflash on
DA850.

Signed-off-by: Kumar, Anil <anilkumar.v@...com>
---
:100644 100644 37c27af... 540e284... M	arch/arm/mach-davinci/da8xx-dt.c
 arch/arm/mach-davinci/da8xx-dt.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index 37c27af..540e284 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -38,12 +38,29 @@ static void __init da8xx_init_irq(void)
 }
 
 #ifdef CONFIG_ARCH_DAVINCI_DA850
+#define DA8XX_AEMIF_CE2CFG_OFFSET       0x10
+#define DA8XX_AEMIF_ASIZE_16BIT         0x1
+
+static void __init da8xx_init_nor(void)
+{
+	void __iomem *aemif_addr;
+
+	aemif_addr = ioremap(DA8XX_AEMIF_CTL_BASE, SZ_32K);
+
+	/* Configure data bus width of CS2 to 16 bit */
+	writel(readl(aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET) |
+			DA8XX_AEMIF_ASIZE_16BIT,
+			aemif_addr + DA8XX_AEMIF_CE2CFG_OFFSET);
+
+	iounmap(aemif_addr);
+}
 
 static void __init da850_init_machine(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 
 	da8xx_uart_clk_enable();
+	da8xx_init_nor();
 }
 
 static const char *da850_boards_compat[] __initdata = {
-- 
1.7.4.1

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