[PATCH 3/5] ARM: omap3evm: enable VBUS switch for EHCI tranceiver
From: Sergei Shtylyov <hidden>
Date: 2012-06-20 12:05:44
Also in:
linux-omap
Hello. On 20-06-2012 13:14, Zumeng Chen wrote:
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<redacted> --- arch/arm/mach-omap2/board-omap3evm.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
quoted hunk ↗ jump to hunk
diff --git a/arch/arm/mach-omap2/board-omap3evm.c b/arch/arm/mach-omap2/board-omap3evm.c index 1bfbe42..02d8047 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;
Empty line after declaration block wouldn't hurt...
+ 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; }
WBR, Sergei