[U-Boot] [[PATCH v2 2/6] ARM: OMAP5: Power: Add USB LDO9 enable interface

[Dan Murphy]

Add an interface to the palmas driver to enable the
LDO9 power supply for the USB hub IC.

Signed-off-by: Dan Murphy <dmurphy at 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 */
-- 
1.7.9.5