[PATCH 1/2] powerpc/pci: Allow to disable filling deprecated pci-OF-bus-map
Pali Rohár
pali at kernel.org
Thu Aug 18 02:39:26 AEST 2022
Creating or filling pci-OF-bus-map property in the device-tree is
deprecated since May 2006 [1]. Allow to disable filling this property by
unsetting config option CONFIG_PPC_PCI_OF_BUS_MAP_FILL for remaining chrp
and powermac code.
Disabling of pci-OF-bus-map property allows to enable new option
CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT also for chrp and powermac.
[1] - https://lore.kernel.org/linuxppc-dev/1148016268.13249.14.camel@localhost.localdomain/
Signed-off-by: Pali Rohár <pali at kernel.org>
---
arch/powerpc/Kconfig | 12 +++++++++++-
arch/powerpc/kernel/pci_32.c | 6 ++++++
2 files changed, 17 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 5881441f7672..df2696c406ad 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -373,9 +373,19 @@ config PPC_DCR
depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
default y
+config PPC_PCI_OF_BUS_MAP_FILL
+ bool "Fill pci-OF-bus-map property in the device-tree"
+ depends on PPC32
+ depends on PPC_PMAC || PPC_CHRP
+ default y
+ help
+ This option creates and fills pci-OF-bus-map property in the
+ device-tree which is deprecated and is needed only for old
+ platforms.
+
config PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
depends on PPC32
- depends on !PPC_PMAC && !PPC_CHRP
+ depends on !PPC_PCI_OF_BUS_MAP_FILL
bool "Assign PCI bus numbers from zero individually for each PCI domain"
help
By default on PPC32 were PCI bus numbers unique across all PCI domains.
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c
index 433965bf37b4..ffc4e1928c80 100644
--- a/arch/powerpc/kernel/pci_32.c
+++ b/arch/powerpc/kernel/pci_32.c
@@ -64,6 +64,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_IBM, PCI_DEVICE_ID_IBM_CPC710_PCI64, fixu
#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP)
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP_FILL
+
static u8* pci_to_OF_bus_map;
static int pci_bus_count;
@@ -223,6 +225,8 @@ pci_create_OF_bus_map(void)
}
#endif
+#endif /* CONFIG_PPC_PCI_OF_BUS_MAP_FILL */
+
#endif /* defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP) */
void pcibios_setup_phb_io_space(struct pci_controller *hose)
@@ -264,6 +268,7 @@ static int __init pcibios_init(void)
}
#if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_CHRP)
+#ifdef CONFIG_PPC_PCI_OF_BUS_MAP_FILL
pci_bus_count = next_busno;
/* OpenFirmware based machines need a map of OF bus
@@ -272,6 +277,7 @@ static int __init pcibios_init(void)
*/
if (pci_assign_all_buses)
pcibios_make_OF_bus_map();
+#endif
#endif
/* Call common code to handle resource allocation */
--
2.20.1
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