diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch b/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch new file mode 100644 index 0000000000..8b7682c34e --- /dev/null +++ b/target/linux/generic/backport-5.10/850-v5.17-0010-PCI-aardvark-Disable-link-training-when-unbinding-dr.patch @@ -0,0 +1,39 @@ +From 759dec2e3dfdbd261c41d2279f04f2351c971a49 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:12 +0100 +Subject: [PATCH] PCI: aardvark: Disable link training when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +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> +--- + 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 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); +-- +2.34.1 + |