1 files changed, 60 insertions, 0 deletions
diff --git a/recipes-kernel/linux/linux-toradex-mainline-4.14/0019-clk-tegra-Fix-pll_u-rate-configuration.patch b/recipes-kernel/linux/linux-toradex-mainline-4.14/0019-clk-tegra-Fix-pll_u-rate-configuration.patch
new file mode 100644
index 0000000..9c846b2
--- /dev/null
+++ b/recipes-kernel/linux/linux-toradex-mainline-4.14/0019-clk-tegra-Fix-pll_u-rate-configuration.patch
@@ -0,0 +1,60 @@
+From 03f99b544b9e6e1e79bb73c9e35d3ea7047e706c Mon Sep 17 00:00:00 2001
+Message-Id: <03f99b544b9e6e1e79bb73c9e35d3ea7047e706c.1529072479.git.marcel.ziswiler@toradex.com>
+In-Reply-To: <fb4764e8eb658d35e8fc62ae79c77e1f6e2b0ef3.1529072479.git.marcel.ziswiler@toradex.com>
+References: <fb4764e8eb658d35e8fc62ae79c77e1f6e2b0ef3.1529072479.git.marcel.ziswiler@toradex.com>
+From: Marcel Ziswiler <marcel@ziswiler.com>
+Date: Fri, 23 Feb 2018 00:04:51 +0100
+Subject: [PATCH 19/27] 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>
+(cherry picked from commit c35b518f9ba06c9de79fb3ff62eed7462d804995)
+---
+ drivers/clk/tegra/clk-pll.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+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,
+-- 
+2.14.4
+