diff options
| author | Marcel Ziswiler <marcel@ziswiler.com> | 2018-02-23 00:04:51 +0100 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2018-03-12 13:59:06 +0100 |
| commit | c35b518f9ba06c9de79fb3ff62eed7462d804995 (patch) | |
| tree | f679ff477ef905b4a5b33938842517f94c5e8b67 /drivers/clk/tegra | |
| parent | clk: tegra: Specify VDE clock rate (diff) | |
| download | linux-c35b518f9ba06c9de79fb3ff62eed7462d804995.tar.xz linux-c35b518f9ba06c9de79fb3ff62eed7462d804995.zip | |
clk: tegra: Fix pll_u rate configuration
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>
Diffstat (limited to 'drivers/clk/tegra')
| -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 7c369e21c91c..830d1c87fa7c 100644 --- a/drivers/clk/tegra/clk-pll.c +++ b/drivers/clk/tegra/clk-pll.c @@ -1151,6 +1151,8 @@ 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, |