The Qualcomm Technologies QDF2432 SoC does not support accesses smaller
than 32 bits to the PCI configuration space. Register the appropriate
quirk.
Signed-off-by: Christopher Covington <cov@xxxxxxxxxxxxxx>
---
drivers/acpi/pci_mcfg.c | 8 ++++++++
drivers/pci/ecam.c | 10 ++++++++++
include/linux/pci-ecam.h | 1 +
3 files changed, 19 insertions(+)
diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
index 245b79f..212334f 100644
--- a/drivers/acpi/pci_mcfg.c
+++ b/drivers/acpi/pci_mcfg.c
@@ -96,6 +96,14 @@ static struct mcfg_fixup mcfg_quirks[] = {
THUNDER_ECAM_MCFG(2, 12),
THUNDER_ECAM_MCFG(2, 13),
#endif
+ { "QCOM ", "QDF2432 ", 1, 0, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 1, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 2, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 3, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 4, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 5, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 6, MCFG_BUS_ANY, &pci_32b_ops },
+ { "QCOM ", "QDF2432 ", 1, 7, MCFG_BUS_ANY, &pci_32b_ops },
};
static char mcfg_oem_id[ACPI_OEM_ID_SIZE];
diff --git a/drivers/pci/ecam.c b/drivers/pci/ecam.c
index 43ed08d..c3b3063 100644
--- a/drivers/pci/ecam.c
+++ b/drivers/pci/ecam.c
@@ -162,3 +162,13 @@ struct pci_ecam_ops pci_generic_ecam_ops = {
.write = pci_generic_config_write,
}
};
+
+/* ops for 32 bit config space access quirk */
+struct pci_ecam_ops pci_32b_ops = {
+ .bus_shift = 20,
+ .pci_ops = {
+ .map_bus = pci_ecam_map_bus,
+ .read = pci_generic_config_read32,
+ .write = pci_generic_config_write32,
+ }
+};
diff --git a/include/linux/pci-ecam.h b/include/linux/pci-ecam.h
index 35f0e81..a6cffb8 100644
--- a/include/linux/pci-ecam.h
+++ b/include/linux/pci-ecam.h
@@ -65,6 +65,7 @@ extern struct pci_ecam_ops pci_thunder_pem_ops;
#ifdef CONFIG_PCI_HOST_THUNDER_ECAM
extern struct pci_ecam_ops pci_thunder_ecam_ops;
#endif
+extern struct pci_ecam_ops pci_32b_ops;
#ifdef CONFIG_PCI_HOST_GENERIC
/* for DT-based PCI controllers that support ECAM */
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm
Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora
Forum, a Linux Foundation Collaborative Project.
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