[PATCHv2] PCI: QDF2432 32 bit config space accessors
From: Christopher Covington <hidden>
Date: 2016-09-21 22:38:25
Also in:
linux-acpi, linux-pci, lkml
Subsystem:
acpi, pci subsystem, the rest · Maintainers:
"Rafael J. Wysocki", Bjorn Helgaas, Linus Torvalds
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 <redacted> --- 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 */
--
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