diff options
| author | Pali Rohár <pali@kernel.org> | 2021-11-30 18:29:11 +0100 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2021-12-02 09:55:49 +0000 |
| commit | 1f54391be8ce0c981d312cb93acdc5608def576a (patch) | |
| tree | 1e8836e0204b92fd2e35869b2f0581365986260b /drivers/pci/controller/pci-aardvark.c | |
| parent | 2f040a17f5061457ae95035326d3159eddc1e5cc (diff) | |
| download | linux-1f54391be8ce0c981d312cb93acdc5608def576a.tar.bz2 | |
PCI: aardvark: Assert PERST# when unbinding driver
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>
Diffstat (limited to 'drivers/pci/controller/pci-aardvark.c')
| -rw-r--r-- | drivers/pci/controller/pci-aardvark.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index b3d89cb449b6..271ebecee965 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1737,6 +1737,10 @@ static int advk_pcie_remove(struct platform_device *pdev) /* 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); |