Commit 759dec2e authored by Pali Rohár's avatar Pali Rohár Committed by Lorenzo Pieralisi
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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: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarMarek Behún <kabel@kernel.org>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
parent 1f54391b

drivers/pci/controller/pci-aardvark.c

+5 −0
Original line number Diff line number Diff line
@@ -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);