lkml.org 
[lkml]   [2021]   [Jul]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 09/11] PCI: kirin: Add power_off support for Kirin 960 PHY
Date
In order to prepare for module unload, add a power_off method
for HiKey 960.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/pci/controller/dwc/pcie-kirin.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index dc6e38ee02b3..58a993a998f3 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -343,6 +343,18 @@ 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
*/
@@ -563,7 +575,6 @@ 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,
@@ -717,8 +728,12 @@ 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;
}
@@ -728,7 +743,7 @@ 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);
--
2.31.1
\
 
 \ /
  Last update: 2021-07-30 11:50    [W:1.076 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site