ARM: SMDK6410: Add comments on ethernet connectivity
authorAndy Green <andy@warmcat.com>
Tue, 29 Dec 2009 14:40:43 +0000 (14:40 +0000)
committerBen Dooks <ben-linux@fluff.org>
Mon, 18 Jan 2010 02:41:04 +0000 (11:41 +0900)
LAN9115 Ethernet only works on SMDK6410 if certain switches
are set in specific ways.  Document the requirement.

Signed-off-by: Andy Green <andy@warmcat.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
arch/arm/mach-s3c6410/mach-smdk6410.c

index e7bae53..eb5de98 100644 (file)
@@ -155,6 +155,16 @@ static struct s3c_fb_platdata smdk6410_lcd_pdata __initdata = {
        .vidcon1        = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
 };
 
+/*
+ * Configuring Ethernet on SMDK6410
+ *
+ * Both CS8900A and LAN9115 chips share one chip select mediated by CFG6.
+ * The constant address below corresponds to nCS1
+ *
+ *  1) Set CFGB2 p3 ON others off, no other CFGB selects "ethernet"
+ *  2) CFG6 needs to be switched to "LAN9115" side
+ */
+
 static struct resource smdk6410_smsc911x_resources[] = {
        [0] = {
                .start = S3C64XX_PA_XM0CSN1,