diff options
| author | Thomas Abraham <t-abraham@ti.com> | 2009-01-04 09:41:09 +0530 |
|---|---|---|
| committer | Remy Bohmer <linux@bohmer.net> | 2009-01-28 19:57:30 +0100 |
| commit | a9d39ebe91ecdd5ac0a0cf56ea162a19773db8da (patch) | |
| tree | e6845eea25572ec267fe76fce934eaecd94b9f8e /board/davinci/dvevm/dvevm.c | |
| parent | a142896934c755e679ba87e227a8e449f39b0012 (diff) | |
usb : musb : Adding USB VBUS enable functionality for DM644x DVEVM
Adding USB VBUS enable functionality for DM644x DVEVM (TI DaVinci)
platform.
Signed-off-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: Swaminathan S <swami.iyer@ti.com>
Signed-off-by: Thomas Abraham <t-abraham@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
Diffstat (limited to 'board/davinci/dvevm/dvevm.c')
| -rw-r--r-- | board/davinci/dvevm/dvevm.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/board/davinci/dvevm/dvevm.c b/board/davinci/dvevm/dvevm.c index abf60b35b0..5dd081c275 100644 --- a/board/davinci/dvevm/dvevm.c +++ b/board/davinci/dvevm/dvevm.c @@ -101,3 +101,26 @@ int misc_init_r(void) return(0); } + +#ifdef CONFIG_USB_DAVINCI + +/* IO Expander I2C address and USB VBUS enable mask */ +#define IOEXP_I2C_ADDR 0x3A +#define IOEXP_VBUSEN_MASK 1 + +/* + * This function enables USB VBUS by writting to IO expander using I2C. + * Note that the I2C is already initialized at this stage. This + * function is used by davinci specific USB wrapper code. + */ +void enable_vbus(void) +{ + uchar data; /* IO Expander data to enable VBUS */ + + /* Write to IO expander to enable VBUS */ + i2c_read(IOEXP_I2C_ADDR, 0, 0, &data, 1); + data &= ~IOEXP_VBUSEN_MASK; + i2c_write(IOEXP_I2C_ADDR, 0, 0, &data, 1); +} +#endif + |