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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>
This commit is contained in:
Mauro Carvalho Chehab 2021-10-21 11:45:16 +01:00 committed by Bjorn Helgaas
parent aed9d9e449
commit 76afbdc76b
1 changed files with 18 additions and 3 deletions
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21
drivers/pci/controller/dwc/pcie-kirin.c
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@ -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);