mfd: omap-usb-tll: Configure ULPIAUTOIDLE

The idle mode needs to be only disabled for UTMIAUTOIDLE while
ULPIAUTOIDLE can be enabled.

This matches the TLL_CHANNEL_CONF_i register configuration for ehci-tll
in the Motorola Linux kernel tree for Wrigley 3G LTE modem on droid 4
and the modem still stays responsive.

Signed-off-by: Tony Lindgren <tony@atomide.com>
Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index 9d167c9af2c6..6f5300b0eb31 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -373,12 +373,13 @@ int omap_tll_init(struct usbhs_omap_platform_data *pdata)
                         } else if (pdata->port_mode[i] ==
                                         OMAP_EHCI_PORT_MODE_TLL) {
                                 /*
-                                 * Disable AutoIdle, BitStuffing
-                                 * and use SDR Mode
+                                 * Disable UTMI AutoIdle, BitStuffing
+                                 * and use SDR Mode. Enable ULPI AutoIdle.
                                  */
                                 reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
                                         | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
                                 reg |= OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF;
+                                reg |= OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE;
                         } else if (pdata->port_mode[i] ==
                                         OMAP_EHCI_PORT_MODE_HSIC) {
                                 /*