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Subject[PATCH 2/5] phy: tegra: xusb: Skip single function lane programming
Date
From: JC Kuo <jckuo@nvidia.com>

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>
---
drivers/phy/tegra/xusb.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index 5b3b8863363e..e3bc60cfe6a1 100644
--- 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);
--
2.19.1
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