From: Pali Roh�<pali@xxxxxxxxxx> commit 759dec2e3dfdbd261c41d2279f04f2351c971a49 upstream. Disable link training circuit in driver unbind sequence. We want to leave link training in the same state as it was before the driver was probed. Link: https://lore.kernel.org/r/20211130172913.9727-11-kabel@xxxxxxxxxx Signed-off-by: Pali Roh�<pali@xxxxxxxxxx> Signed-off-by: Marek Beh�abel@xxxxxxxxxx> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> Signed-off-by: Marek Beh�abel@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/pci/controller/pci-aardvark.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1725,6 +1725,11 @@ static int advk_pcie_remove(struct platf if (pcie->reset_gpio) gpiod_set_value_cansleep(pcie->reset_gpio, 1); + /* Disable link training */ + val = advk_readl(pcie, PCIE_CORE_CTRL0_REG); + val &= ~LINK_TRAINING_EN; + advk_writel(pcie, val, PCIE_CORE_CTRL0_REG); + /* Disable outbound address windows mapping */ for (i = 0; i < OB_WIN_COUNT; i++) advk_pcie_disable_ob_win(pcie, i);
