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| author | Pali Rohár <pali@kernel.org> | 2021-11-30 18:29:12 +0100 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2021-12-02 09:55:49 +0000 |
| commit | 759dec2e3dfdbd261c41d2279f04f2351c971a49 (patch) | |
| tree | 7d1249306fede80390c761ff61b319162a88942d | |
| parent | 1f54391be8ce0c981d312cb93acdc5608def576a (diff) | |
| download | linux-759dec2e3dfdbd261c41d2279f04f2351c971a49.tar.gz | |
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>
| -rw-r--r-- | drivers/pci/controller/pci-aardvark.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index 271ebecee965..e5c88f1c177b 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -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); |