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PCI: aardvark: Disable link training when unbinding driver

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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);