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PCI: aardvark: Disable link training when unbinding driver 

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>
This commit is contained in:
Pali Rohár 2021-11-30 18:29:12 +01:00 committed by Lorenzo Pieralisi
parent 1f54391be8
commit 759dec2e3d
1 changed files with 5 additions and 0 deletions
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5
drivers/pci/controller/pci-aardvark.c
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@ -1741,6 +1741,11 @@ 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);