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arm: a37xx: pci: Register controller also when no PCIe card is connected

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Allow access to config space of PCIe Root Port (which is always present on
the root bus) even when PCIe link is down or no card is connected.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2022-02-15 11:23:36 +01:00 committed by Stefan Roese
parent 2727e9dd27
commit 6c7ccb9700
1 changed files with 3 additions and 9 deletions
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12
drivers/pci/pci-aardvark.c
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@ -645,11 +645,8 @@ retry:
* @pcie: The PCI device to access
*
* Wait up to 1 second for link training to be accomplished.
*
* Return 1 (true) if link training ends up with link up success.
* Return 0 (false) if link training ends up with link up failure.
*/
static int pcie_advk_wait_for_link(struct pcie_advk *pcie)
static void pcie_advk_wait_for_link(struct pcie_advk *pcie)
{
int retries;
@ -657,15 +654,13 @@ static int pcie_advk_wait_for_link(struct pcie_advk *pcie)
for (retries = 0; retries < LINK_MAX_RETRIES; retries++) {
if (pcie_advk_link_up(pcie)) {
printf("PCIe: Link up\n");
return 0;
return;
}
udelay(LINK_WAIT_TIMEOUT);
}
printf("PCIe: Link down\n");
return -ETIMEDOUT;
}
/*
@ -898,8 +893,7 @@ static int pcie_advk_setup_hw(struct pcie_advk *pcie)
return -EINVAL;
/* Wait for PCIe link up */
if (pcie_advk_wait_for_link(pcie))
return -ENXIO;
pcie_advk_wait_for_link(pcie);
return 0;
}