[RFC 3/5] ARM: OMAP2+: Add AM3517 MUSB setup to pdata quirks.

[Adam Ford <aford173@gmail.com>]

The pin muxing and clock definitions for the MUSB controller are
not done through the same registers/pin mux options, so this
explicitly configures the registers and pin-mux options for MUSB
on AM3517-EVM

Signed-off-by: Adam Ford <aford173@gmail.com>

diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
index 7f02743edbe4..e0c7ac2c87c1 100644
--- a/arch/arm/mach-omap2/pdata-quirks.c
+++ b/arch/arm/mach-omap2/pdata-quirks.c
@@ -258,9 +258,28 @@ static void __init omap3_sbc_t3517_legacy_init(void)
 	omap3_sbc_t3517_wifi_init();
 }
 
+/* The pin muxing for AM3517 OTG isn't done through the normal means */
+static __init void am3517_evm_musb_init(void)
+{
+	u32 devconf2;
+
+	/*
+	 * Set up USB clock/mode in the DEVCONF2 register.
+	 */
+	devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2);
+
+	/* USB2.0 PHY reference clock is 13 MHz */
+	devconf2 &= ~(CONF2_REFFREQ | CONF2_OTGMODE | CONF2_PHY_GPIOMODE);
+	devconf2 |=  CONF2_REFFREQ_13MHZ | CONF2_SESENDEN | CONF2_VBDTCTEN
+			| CONF2_DATPOL;
+
+	omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
+}
+
 static void __init am3517_evm_legacy_init(void)
 {
 	am35xx_emac_reset();
+	am3517_evm_musb_init();
 }
 
 static struct platform_device omap3_rom_rng_device = {
-- 
2.17.1