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PCI: rockchip: dw: Add runtime pm support

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Currently, the PCIe pd is in unsupported state which fails to power
down it even if not devices attached.This patch is required when the pcie
controller sits on a bus with its own power domain and clocks which are
controlled via a bus driver like simple pm bus.

Change-Id: Ic0fbaec82a25b92e9b874aa3003f0b18451985a6
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Shawn Lin
2024-10-14 10:29:44 +08:00
committed by Tao Huang
parent 7073ff96a5
commit 666775e30a
1 changed files with 6 additions and 0 deletions
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6
drivers/pci/controller/dwc/pcie-dw-rockchip.c
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@@ -18,6 +18,7 @@
#include <linux/of_pci.h>
#include <linux/phy/phy.h>
#include <linux/phy/pcie.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/rfkill-wlan.h>
@@ -1506,6 +1507,9 @@ static int rk_pcie_really_probe(void *p)
if (ret)
goto release_driver;
pm_runtime_enable(dev);
pm_runtime_get_sync(pci->dev);
reset_control_assert(rk_pcie->rsts);
udelay(10);
@@ -1591,6 +1595,8 @@ disable_phy:
disable_clk:
clk_bulk_disable_unprepare(rk_pcie->clk_cnt, rk_pcie->clks);
disable_vpcie3v3:
pm_runtime_put(dev);
pm_runtime_disable(dev);
rk_pcie_disable_power(rk_pcie);
release_driver:
if (IS_ENABLED(CONFIG_PCIE_RK_THREADED_INIT))