From: Zumeng Chen Date: Wed, 20 Jun 2012 09:14:51 +0000 (+0800) Subject: ARM: omap3evm: enable VBUS switch for EHCI tranceiver X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=cb8ca5897;p=linux-beck.git ARM: omap3evm: enable VBUS switch for EHCI tranceiver This was chosen by following the trace on the schematic from component U131 and U134 to the CPEN pin on the USB3320 device. TWL4030.GPIO2-...->(T2_GPIO2_3V3)U131-..>nUSB2_EN-..>U134-..>EXP_nUSB2_1V8 which starts EHCI tranceiver USB3320. This will set TWL4030.GPIO2 as output pin to drive EHCI tranceiver. Signed-off-by: Zumeng Chen Signed-off-by: Tony Lindgren --- diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c index 1bfbe42bbedd..0fd4ae2fbb20 100644 --- a/arch/arm/mach-omap2/board-omap3evm.c +++ b/arch/arm/mach-omap2/board-omap3evm.c @@ -360,6 +360,17 @@ static int omap3evm_twl_gpio_setup(struct device *dev, platform_device_register(&leds_gpio); + /* Enable VBUS switch by setting TWL4030.GPIO2DIR as output + * for starting USB tranceiver + */ + if (get_omap3_evm_rev() >= OMAP3EVM_BOARD_GEN_2) { + u8 val; + + twl_i2c_read_u8(TWL4030_MODULE_GPIO, &val, REG_GPIODATADIR1); + val |= 0x04; /* TWL4030.GPIO2DIR BIT at GPIODATADIR1(0x9B) */ + twl_i2c_write_u8(TWL4030_MODULE_GPIO, val, REG_GPIODATADIR1); + } + return 0; }