[PATCH u-boot-marvell 2/3] arm: a37xx: pci: Register controller also when no PCIe card is connected

Pali Rohár
2022-02-15T10:24:36Z

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>
---
drivers/pci/pci-aardvark.c | 12 +++---------
1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/pci-aardvark.c b/drivers/pci/pci-aardvark.c
index ccaeecaca8e3..c795ef10b884 100644
--- a/drivers/pci/pci-aardvark.c
+++ b/drivers/pci/pci-aardvark.c
@@ -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;
}
--
2.20.1