phy: tegra: xusb: Skip single function lane programming

Tegra186 USB2 pads and USB3 pads do not have hardware mux for changing
the pad function. For such "lanes", we can skip the lane mux register
programming.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 5b3b8863363ed79a87db6f49e98cb4e1ab337619..e3bc60cfe6a194fc3070db9e94c243f5850c0c53 100644 (file)
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2015, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2014-2016, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -313,6 +313,10 @@ static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
        const struct tegra_xusb_lane_soc *soc = lane->soc;
        u32 value;
 
+       /* skip single function lanes */
+       if (soc->num_funcs < 2)
+               return;
+
        /* choose function */
        value = padctl_readl(padctl, soc->offset);
        value &= ~(soc->mask << soc->shift);