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phy: tegra: xusb: Skip single function lane programming

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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>
This commit is contained in:
JC Kuo 2019-02-21 16:46:31 +01:00 committed by Kishon Vijay Abraham I
parent 2b8d59296c
commit 3cffa0818d
1 changed files with 5 additions and 1 deletions
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6
drivers/phy/tegra/xusb.c
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@ -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);