From: Pali Rohár 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 Rohár pali@kernel.org Signed-off-by: Marek Behún kabel@kernel.org Signed-off-by: Lorenzo Pieralisi lorenzo.pieralisi@arm.com Signed-off-by: Marek Behún kabel@kernel.org --- drivers/pci/controller/pci-aardvark.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 78bc57d57926..3f6919564434 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1725,6 +1725,11 @@ static int advk_pcie_remove(struct platform_device *pdev) 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);