diff options
| author | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-10-21 11:45:16 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2021-11-04 14:34:23 -0500 |
| commit | 76afbdc76b801f459452fa71d3ea00b7f8afd0fc (patch) | |
| tree | 4eb21aa7bbe72d5363a5eda40233840e64705e2b /drivers/pci/controller | |
| parent | aed9d9e44926f63344c069b79890738c542bc513 (diff) | |
PCI: kirin: Add power_off support for Kirin 960 PHY
In order to prepare for module unload, add a power_off method for HiKey
960.
Link: https://lore.kernel.org/r/b095818b0d7fadae4cae200f481caf7a66e61fb4.1634812676.git.mchehab+huawei@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Xiaowei Song <songxiaowei@hisilicon.com>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/dwc/pcie-kirin.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c index 66e3aefcb817..6c9fb3f219ba 100644 --- a/drivers/pci/controller/dwc/pcie-kirin.c +++ b/drivers/pci/controller/dwc/pcie-kirin.c @@ -342,6 +342,18 @@ static int hi3660_pcie_phy_init(struct platform_device *pdev, return hi3660_pcie_phy_get_resource(phy); } +static int hi3660_pcie_phy_power_off(struct kirin_pcie *pcie) +{ + struct hi3660_pcie_phy *phy = pcie->phy_priv; + + /* Drop power supply for Host */ + regmap_write(phy->sysctrl, SCTRL_PCIE_CMOS_OFFSET, 0x00); + + hi3660_pcie_phy_clk_ctrl(phy, false); + + return 0; +} + /* * The non-PHY part starts here */ @@ -561,7 +573,6 @@ static int kirin_pcie_add_bus(struct pci_bus *bus) return 0; } - static struct pci_ops kirin_pci_ops = { .read = kirin_pcie_rd_own_conf, .write = kirin_pcie_wr_own_conf, @@ -715,8 +726,12 @@ static int kirin_pcie_power_on(struct platform_device *pdev, return 0; err: - if (kirin_pcie->type != PCIE_KIRIN_INTERNAL_PHY) + if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) { + hi3660_pcie_phy_power_off(kirin_pcie); + } else { + phy_power_off(kirin_pcie->phy); phy_exit(kirin_pcie->phy); + } return ret; } @@ -726,7 +741,7 @@ static int __exit kirin_pcie_remove(struct platform_device *pdev) struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev); if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) - return 0; + return hi3660_pcie_phy_power_off(kirin_pcie); phy_power_off(kirin_pcie->phy); phy_exit(kirin_pcie->phy); |