diff options
| author | Pali Rohár <pali@kernel.org> | 2023-02-06 14:39:02 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-02-07 12:15:23 +0300 |
| commit | 5d2eb73aa0fd57844938a22bddc59f7bc8183924 (patch) | |
| tree | ed27a0247e70c5f3a68bba560b617866b9cbc25f /arch/powerpc/include/asm/pci-bridge.h | |
| parent | 34557b7504778e32b166cf46c6f774086124e845 (diff) | |
| download | linux-5d2eb73aa0fd57844938a22bddc59f7bc8183924.tar.xz | |
powerpc/pci: Add option for using pci_to_OF_bus_map
The "pci-OF-bus-map" property was declared deprecated in 2006 [1] and to
the best of everyone's knowledge is not used by anything anymore [2].
The creation of the property was disabled on powermac (arch/powerpc) in
2005 by commit 35499c0195e4 ("powerpc: Merge in 64-bit powermac
support."). But it is still created by default on CHRP.
On powermac the actual map (pci_to_OF_bus_map) is still used by default,
even though the device tree property is not created.
Add an option to enable/disable use of the pci_to_OF_bus_map, and
creation of the property (on CHRP).
Disabling the option allows enabling CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT
which allows "normal" bus numbering and more than 256 buses, like 64-bit
and other architectures.
Mark the new option as default n, the intention is that the option and
the code will be removed in a future release.
[1]: https://lore.kernel.org/linuxppc-dev/1148016268.13249.14.camel@localhost.localdomain/
[2]: https://lore.kernel.org/all/575f239205e8635add81c9f902b7d9db7beb83ea.camel@kernel.crashing.org/
Signed-off-by: Pali Rohár <pali@kernel.org>
[mpe: Reword commit & help text, shrink option name, rework to fix build errors]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230206113902.1857123-1-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include/asm/pci-bridge.h')
| -rw-r--r-- | arch/powerpc/include/asm/pci-bridge.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/pci-bridge.h b/arch/powerpc/include/asm/pci-bridge.h index e18c95f4e1d4..71c1d26f2400 100644 --- a/arch/powerpc/include/asm/pci-bridge.h +++ b/arch/powerpc/include/asm/pci-bridge.h @@ -176,8 +176,10 @@ extern int pci_device_from_OF_node(struct device_node *node, #endif #ifndef CONFIG_PPC64 -#ifdef CONFIG_PPC_CHRP +#ifdef CONFIG_PPC_PCI_OF_BUS_MAP extern void pci_create_OF_bus_map(void); +#else +static inline void pci_create_OF_bus_map(void) {} #endif #else /* CONFIG_PPC64 */ |