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PCI: rockchip: dw: Add kthread to probe PCIe devices

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It take quite a long time to wait for devices to be probed
in multi-RCs system and even longer to wait for timeout
if no devices attached. Use kthread to save the boot time.

Change-Id: Ib7060679287f0a08fbb9ff437947d8a47e775b75
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
This commit is contained in:
Shawn Lin
2020-12-21 15:17:12 +08:00
committed by Tao Huang
parent bdabd96dae
commit 79ac46bdea
1 changed files with 15 additions and 2 deletions
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17
drivers/pci/controller/dwc/pcie-dw-rockchip.c
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@@ -1061,6 +1061,8 @@ static const struct of_device_id rk_pcie_of_match[] = {
{}, {},
}; };
MODULE_DEVICE_TABLE(of, rk_pcie_of_match);
static const struct dw_pcie_ops dw_pcie_ops = { static const struct dw_pcie_ops dw_pcie_ops = {
.start_link = rk_pcie_establish_link, .start_link = rk_pcie_establish_link,
.link_up = rk_pcie_link_up, .link_up = rk_pcie_link_up,
@@ -1109,8 +1111,9 @@ static void rk_pcie_fast_link_setup(struct rk_pcie *rk_pcie)
rk_pcie_writel_apb(rk_pcie, PCIE_CLIENT_HOT_RESET_CTRL, val); rk_pcie_writel_apb(rk_pcie, PCIE_CLIENT_HOT_RESET_CTRL, val);
} }
static int rk_pcie_probe(struct platform_device *pdev) static int rk_pcie_really_probe(void *p)
{ {
struct platform_device *pdev = p;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct rk_pcie *rk_pcie; struct rk_pcie *rk_pcie;
struct dw_pcie *pci; struct dw_pcie *pci;
@@ -1246,7 +1249,17 @@ deinit_clk:
return ret; return ret;
} }
MODULE_DEVICE_TABLE(of, rk_pcie_of_match); static int rk_pcie_probe(struct platform_device *pdev)
{
struct task_struct *tsk;
tsk = kthread_run(rk_pcie_really_probe, pdev, "rk-pcie");
if (IS_ERR(tsk)) {
dev_err(&pdev->dev, "start rk-pcie thread failed\n");
return PTR_ERR(tsk);
}
return 0;
}
static int __maybe_unused rockchip_dw_pcie_suspend(struct device *dev) static int __maybe_unused rockchip_dw_pcie_suspend(struct device *dev)
{ {