Add an interface to the palmas driver to enable the LDO9 power supply for the USB hub IC.
Signed-off-by: Dan Murphy dmurphy@ti.com --- drivers/power/palmas.c | 34 ++++++++++++++++++++++++++++++++++ include/palmas.h | 1 + 2 files changed, 35 insertions(+)
diff --git a/drivers/power/palmas.c b/drivers/power/palmas.c index 2d275a7..b800dd4 100644 --- a/drivers/power/palmas.c +++ b/drivers/power/palmas.c @@ -143,6 +143,40 @@ int twl603x_audio_power(u8 on) } #endif
+#ifdef CONFIG_PALMAS_USBPWR +int palmas_usb_poweron_ldo(void) +{ + u8 val = 0; + int err; + + /* TURN ON LDO's needed */ + val = RSC_STAT_ON | RSC_MODE_SLEEP | RSC_MODE_ACTIVE; + err = palmas_i2c_write_u8(TWL603X_CHIP_P1, SYSEN2_CTRL, val); + if (err) { + printf("palmas: could not turn 3v3 %s: err = %d\n", + val ? "on" : "off", err); + return err; + } + + /* set to 3.3V */ + val = LDO9_BYPASS; + err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDOUSB_VOLTAGE, val); + if (err) { + printf("palmas: could not set 3v3 %s: err = %d\n", + val ? "on" : "off", err); + return err; + } + + /* enable LDO USB */ + err = palmas_i2c_write_u8(TWL603X_CHIP_P1, LDOUSB_CTRL, val); + if (err) { + printf("palmas: could not enable 3v3 %s: err = %d\n", + val ? "on" : "off", err); + return err; + } +} +#endif + /* * Enable/disable back-up battery (or super cap) charging on TWL6035/37. * Please use defined BB_xxx values. diff --git a/include/palmas.h b/include/palmas.h index aff48b5..43887c2 100644 --- a/include/palmas.h +++ b/include/palmas.h @@ -130,5 +130,6 @@ int palmas_mmc1_poweron_ldo(void); int twl603x_mmc1_set_ldo9(u8 vsel); int twl603x_audio_power(u8 on); int twl603x_enable_bb_charge(u8 bb_fields); +int palmas_usb_poweron_ldo(void);
#endif /* PALMAS_H */