From: Pali Roh�r pali@kernel.org
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@kernel.org Signed-off-by: Pali Roh�r pali@kernel.org Signed-off-by: Marek Beh�n kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Marek Beh�n kabel@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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);