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61 lines
1.6 KiB
61 lines
1.6 KiB
7 years ago
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From 287b9df160b6159f8d385424904f8bac501280c1 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Sat, 9 Jul 2016 10:58:16 +0100
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Subject: pci: mvebu: time out reset on link up
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If the port reports that the link is up while we are resetting, there's
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little point in waiting for the full duration.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/pci/host/pci-mvebu.c | 20 ++++++++++++++------
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1 file changed, 14 insertions(+), 6 deletions(-)
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--- a/drivers/pci/host/pci-mvebu.c
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+++ b/drivers/pci/host/pci-mvebu.c
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@@ -1167,6 +1167,7 @@ static int mvebu_pcie_powerup(struct mve
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if (port->reset_gpio) {
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u32 reset_udelay = PCI_PM_D3COLD_WAIT * 1000;
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+ unsigned int i;
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of_property_read_u32(port->dn, "reset-delay-us",
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&reset_udelay);
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@@ -1174,7 +1175,13 @@ static int mvebu_pcie_powerup(struct mve
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udelay(100);
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gpiod_set_value_cansleep(port->reset_gpio, 0);
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- msleep(reset_udelay / 1000);
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+ for (i = 0; i < reset_udelay; i += 1000) {
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+ if (mvebu_pcie_link_up(port))
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+ break;
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+ msleep(1);
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+ }
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+
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+ printk("%s: reset completed in %dus\n", port->name, i);
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}
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return 0;
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@@ -1261,15 +1268,16 @@ static int mvebu_pcie_probe(struct platf
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if (!child)
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continue;
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- ret = mvebu_pcie_powerup(port);
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- if (ret < 0)
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- continue;
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-
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port->base = mvebu_pcie_map_registers(pdev, child, port);
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if (IS_ERR(port->base)) {
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dev_err(dev, "%s: cannot map registers\n", port->name);
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port->base = NULL;
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- mvebu_pcie_powerdown(port);
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+ continue;
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+ }
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+
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+ ret = mvebu_pcie_powerup(port);
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+ if (ret < 0) {
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+ port->base = NULL;
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continue;
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}
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