diff options
| author | JC Kuo <jckuo@nvidia.com> | 2019-06-12 11:14:34 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 19:06:48 +0200 |
| commit | 85d854b421130b3f9a6bee50be9f159e578e6b6d (patch) | |
| tree | 400a1a3f1f0092f69b605ab1d19453e9886a9b29 /lib/test_string.c | |
| parent | cf0fcc7fe2008a8cf7c53ab6af2901a61204700e (diff) | |
clk: tegra210: fix PLLU and PLLU_OUT1
[ Upstream commit 0d34dfbf3023cf119b83f6470692c0b10c832495 ]
Full-speed and low-speed USB devices do not work with Tegra210
platforms because of incorrect PLLU/PLLU_OUT1 clock settings.
When full-speed device is connected:
[ 14.059886] usb 1-3: new full-speed USB device number 2 using tegra-xusb
[ 14.196295] usb 1-3: device descriptor read/64, error -71
[ 14.436311] usb 1-3: device descriptor read/64, error -71
[ 14.675749] usb 1-3: new full-speed USB device number 3 using tegra-xusb
[ 14.812335] usb 1-3: device descriptor read/64, error -71
[ 15.052316] usb 1-3: device descriptor read/64, error -71
[ 15.164799] usb usb1-port3: attempt power cycle
When low-speed device is connected:
[ 37.610949] usb usb1-port3: Cannot enable. Maybe the USB cable is bad?
[ 38.557376] usb usb1-port3: Cannot enable. Maybe the USB cable is bad?
[ 38.564977] usb usb1-port3: attempt power cycle
This commit fixes the issue by:
1. initializing PLLU_OUT1 before initializing XUSB_FS_SRC clock
because PLLU_OUT1 is parent of XUSB_FS_SRC.
2. changing PLLU post-divider to /2 (DIVP=1) according to Technical
Reference Manual.
Fixes: e745f992cf4b ("clk: tegra: Rework pll_u")
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'lib/test_string.c')
0 files changed, 0 insertions, 0 deletions