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arm: a37xx: pci: Fix pcie_advk_link_up()

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Aardvark reports Disabled and Hot Reset LTSSM states as values >= 0x20.
Link is not up in these states, so fix pcie_advk_link_up() function.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2021-09-26 00:54:41 +02:00 committed by Stefan Roese
parent de72930433
commit 6b2771cb19
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/pci-aardvark.c
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@ -145,6 +145,7 @@
#define LTSSM_SHIFT 24
#define LTSSM_MASK 0x3f
#define LTSSM_L0 0x10
#define LTSSM_DISABLED 0x20
#define VENDOR_ID_REG (LMI_BASE_ADDR + 0x44)
/* PCIe core controller registers */
@ -569,7 +570,7 @@ static int pcie_advk_link_up(struct pcie_advk *pcie)
val = advk_readl(pcie, CFG_REG);
ltssm_state = (val >> LTSSM_SHIFT) & LTSSM_MASK;
return ltssm_state >= LTSSM_L0;
return ltssm_state >= LTSSM_L0 && ltssm_state < LTSSM_DISABLED;
}
/**