Hi Dmitry, Am Freitag, 27. April 2018, 01:58:14 CEST schrieb Dmitry Osipenko: > Hello, > > This series of patches fixes ULPI USB on Tegra20. The original problem > was reported by Marcel Ziswiler, he found that "ulpi-link" clock was > incorrectly set to CDEV2 instead of PLL_P_OUT4. Marcel made a patch > that changed the "ulpi-link" clock to PLL_P_OUT4 and that fixed issue > with the USB for the devices that have CDEV2 being enabled by bootloader. > The patch got into the kernel and later Marc Dietrich found that USB > stopped working on the "paz00" Tegra20 board. After a bit of discussion > was revealed that PLL_P_OUT4 is the parent clock of the CDEV2 and clock > driver was setting CDEV2's parent incorrectly. The parent clock is actually > determined by the pinmuxing config of CDEV2 pingroup. This patchset fixes > the parent of CDEV2 clock by making Tegra's pinctrl driver a clock provider, > providing CDEV1/2 clock muxes (thanks to Peter De Schrijver for the > suggestion), and then setting these clock muxes as parents for the CDEV1/2 > clocks. In the end Marcel's CDEV2->PLL_P_OUT4 change is reverted since > CDEV2 (aka MCLK2) is the actual clock source for "ulpi-link". > > Dmitry Osipenko (4): > clk: tegra20: Add DEV1/DEV2 OSC dividers > pinctrl: tegra20: Provide CDEV1/2 clock muxes > clk: tegra20: Set correct parents for CDEV1/2 clocks > ARM: dts: tegra20: Revert "Fix ULPI regression on Tegra20" > > arch/arm/boot/dts/tegra20.dtsi | 2 +- > drivers/clk/tegra/clk-tegra20.c | 18 +++++++++++---- > drivers/pinctrl/tegra/pinctrl-tegra.c | 11 --------- > drivers/pinctrl/tegra/pinctrl-tegra.h | 11 +++++++++ > drivers/pinctrl/tegra/pinctrl-tegra20.c | 30 ++++++++++++++++++++++++- > 5 files changed, 55 insertions(+), 17 deletions(-) Thanks for taking a look at this! Series is: Tested-by: Marc Dietrich <marvin24@xxxxxx> Marc -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
