From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zumeng Chen Subject: [PATCH V2 3/5] ARM: omap3evm: enable VBUS switch for EHCI tranceiver Date: Wed, 13 Jun 2012 09:44:08 +0800 Message-ID: <1339551850-20827-4-git-send-email-zumeng.chen@gmail.com> References: <1339551850-20827-1-git-send-email-zumeng.chen@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail.windriver.com ([147.11.1.11]:41296 "EHLO mail.windriver.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752081Ab2FMBom (ORCPT ); Tue, 12 Jun 2012 21:44:42 -0400 In-Reply-To: <1339551850-20827-1-git-send-email-zumeng.chen@gmail.com> Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: tony@atomide.com, jon-hunter@ti.com, grinberg@compulab.co.il, linux-omap@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, khilman@ti.com, khasim@ti.com, ajay.gupta@ti.com, hvaibhav@ti.com, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org From: Zumeng Chen 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: Ajay Kumar Gupta Signed-off-by: Zumeng Chen --- arch/arm/mach-omap2/board-omap3evm.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c index 3c91534..63bb865 100644 --- a/arch/arm/mach-omap2/board-omap3evm.c +++ b/arch/arm/mach-omap2/board-omap3evm.c @@ -360,6 +360,15 @@ 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; } -- 1.7.5.4