Messages in this thread Patch in this message | | | From | Thierry Reding <> | Subject | [PATCH 2/5] phy: tegra: xusb: Skip single function lane programming | Date | Fri, 25 Jan 2019 12:25:22 +0100 |
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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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