diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch b/target/linux/generic/backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch new file mode 100644 index 0000000000..1e9e74136c --- /dev/null +++ b/target/linux/generic/backport-5.15/850-v5.17-0009-PCI-aardvark-Assert-PERST-when-unbinding-driver.patch @@ -0,0 +1,33 @@ +From 1f54391be8ce0c981d312cb93acdc5608def576a Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> +Date: Tue, 30 Nov 2021 18:29:11 +0100 +Subject: [PATCH] PCI: aardvark: Assert PERST# when unbinding driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Put the PCIe card into reset by asserting PERST# signal when unbinding +driver. It doesn't make sense to leave the card working if it can't +communicate with the host. This should also save some power. + +Link: https://lore.kernel.org/r/20211130172913.9727-10-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 | 4 ++++ + 1 file changed, 4 insertions(+) + +--- a/drivers/pci/controller/pci-aardvark.c ++++ b/drivers/pci/controller/pci-aardvark.c +@@ -1738,6 +1738,10 @@ static int advk_pcie_remove(struct platf + /* Free config space for emulated root bridge */ + pci_bridge_emul_cleanup(&pcie->bridge); + ++ /* Assert PERST# signal which prepares PCIe card for power down */ ++ if (pcie->reset_gpio) ++ gpiod_set_value_cansleep(pcie->reset_gpio, 1); ++ + /* Disable outbound address windows mapping */ + for (i = 0; i < OB_WIN_COUNT; i++) + advk_pcie_disable_ob_win(pcie, i); |