diff options
| author | Marcel Ziswiler <marcel@ziswiler.com> | 2018-02-23 02:04:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-25 17:13:10 +0300 |
| commit | eaab238dbb53206d2864074d0365a263a51054e2 (patch) | |
| tree | 5687be27cb330a45f0d0207ae3de712c13826220 | |
| parent | 2c440ef456c297c44c2fa5bc061f995ab7692344 (diff) | |
| download | linux-eaab238dbb53206d2864074d0365a263a51054e2.tar.xz | |
clk: tegra: Fix pll_u rate configuration
[ Upstream commit c35b518f9ba06c9de79fb3ff62eed7462d804995 ]
Turns out latest upstream U-Boot does not configure/enable pll_u which
leaves it at some default rate of 500 kHz:
root@apalis-t30:~# cat /sys/kernel/debug/clk/clk_summary | grep pll_u
pll_u 3 3 0 500000 0
Of course this won't quite work leading to the following messages:
[ 6.559593] usb 2-1: new full-speed USB device number 2 using tegra-
ehci
[ 11.759173] usb 2-1: device descriptor read/64, error -110
[ 27.119453] usb 2-1: device descriptor read/64, error -110
[ 27.389217] usb 2-1: new full-speed USB device number 3 using tegra-
ehci
[ 32.559454] usb 2-1: device descriptor read/64, error -110
[ 47.929777] usb 2-1: device descriptor read/64, error -110
[ 48.049658] usb usb2-port1: attempt power cycle
[ 48.759475] usb 2-1: new full-speed USB device number 4 using tegra-
ehci
[ 59.349457] usb 2-1: device not accepting address 4, error -110
[ 59.509449] usb 2-1: new full-speed USB device number 5 using tegra-
ehci
[ 70.069457] usb 2-1: device not accepting address 5, error -110
[ 70.079721] usb usb2-port1: unable to enumerate USB device
Fix this by actually allowing the rate also being set from within
the Linux kernel.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/clk/tegra/clk-pll.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/clk/tegra/clk-pll.c b/drivers/clk/tegra/clk-pll.c index b3855360d6bc..66d1fc7dff58 100644 --- a/drivers/clk/tegra/clk-pll.c +++ b/drivers/clk/tegra/clk-pll.c @@ -1145,6 +1145,8 @@ static const struct clk_ops tegra_clk_pllu_ops = { .enable = clk_pllu_enable, .disable = clk_pll_disable, .recalc_rate = clk_pll_recalc_rate, + .round_rate = clk_pll_round_rate, + .set_rate = clk_pll_set_rate, }; static int _pll_fixed_mdiv(struct tegra_clk_pll_params *pll_params, |