Hi,
This patch adds support for PCI to AArch64. It is based on my v6 patch
that adds support for creating generic host bridge structure from
device tree. With that in place, I was able to boot a platform that
has PCIe host bridge support and use a PCIe network card.
Changes from v5:
- Removed pcibios_fixup_bridge_ranges() as the week default version is fine.
- Removed the ALIGN() call in pcibios_align_resource()
- Stopped exporting pcibios_align_resource()
Changes from v4:
- Fixed the pci_domain_nr() implementation for arm64. Now we use
find_pci_host_bride() to find the host bridge before we retrieve
the domain number.
Changes from v3:
- Added Acks accumulated so far ;)
- Still carrying Catalin's patch for moving the PCI_IO_BASE until it
lands in linux-next or mainline, in order to ease applying the series
Changes from v2:
- Implement an arch specific version of pci_register_io_range() and
pci_address_to_pio().
- Return 1 from pci_proc_domain().
Changes from v1:
- Added Catalin's patch for moving the PCI_IO_BASE location and extend
its size to 16MB
- Integrated Arnd's version of pci_ioremap_io that uses a bitmap for
keeping track of assigned IO space and returns an io_offset. At the
moment the code is added in arch/arm64 but it can be moved in drivers/pci.
- Added a fix for the generic ioport_map() function when !CONFIG_GENERIC_IOMAP
as suggested by Arnd.
v5 thread here: https://lkml.org/lkml/2014/3/4/307
v4 thread here: https://lkml.org/lkml/2014/3/3/298
v3 thread here: https://lkml.org/lkml/2014/2/28/211
v2 thread here: https://lkml.org/lkml/2014/2/27/255
v1 thread here: https://lkml.org/lkml/2014/2/3/389
The API used is different from the one used by ARM architecture. There is
no pci_common_init_dev() function and no hw_pci structure, as that is no
longer needed. Once the last signature is added to the legal agreement, I
will post the host bridge driver code that I am using. Meanwhile, here
is an example of what the probe function looks like, posted as an example:
static int myhostbridge_probe(struct platform_device *pdev)
{
int err;
struct device_node *dev;
struct pci_host_bridge *bridge;
struct myhostbridge_port *pp;
resource_size_t lastbus;
dev = pdev->dev.of_node;
if (!of_device_is_available(dev)) {
pr_warn("%s: disabled\n", dev->full_name);
return -ENODEV;
}
pp = kzalloc(sizeof(struct myhostbridge_port), GFP_KERNEL);
if (!pp)
return -ENOMEM;
bridge = of_create_pci_host_bridge(&pdev->dev, &myhostbridge_ops, pp);
if (IS_ERR(bridge)) {
err = PTR_ERR(bridge);
goto bridge_create_fail;
}
err = myhostbridge_setup(bridge->bus);
if (err)
goto bridge_setup_fail;
/* We always enable PCI domains and we keep domain 0 backward
* compatible in /proc for video cards
*/
pci_add_flags(PCI_ENABLE_PROC_DOMAINS);
pci_add_flags(PCI_REASSIGN_ALL_BUS | PCI_REASSIGN_ALL_RSRC);
lastbus = pci_scan_child_bus(bridge->bus);
pci_bus_update_busn_res_end(bridge->bus, lastbus);
pci_assign_unassigned_bus_resources(bridge->bus);
pci_bus_add_devices(bridge->bus);
return 0;
bridge_setup_fail:
put_device(&bridge->dev);
device_unregister(&bridge->dev);
bridge_create_fail:
kfree(pp);
return err;
}
Best regards,
Liviu
Catalin Marinas (1):
arm64: Extend the PCI I/O space to 16MB
Liviu Dudau (2):
Fix ioport_map() for !CONFIG_GENERIC_IOMAP cases.
arm64: Add architecture support for PCI
Documentation/arm64/memory.txt | 16 ++--
arch/arm64/Kconfig | 19 ++++-
arch/arm64/include/asm/Kbuild | 1 +
arch/arm64/include/asm/io.h | 5 +-
arch/arm64/include/asm/pci.h | 49 ++++++++++++
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/pci.c | 173 +++++++++++++++++++++++++++++++++++++++++
include/asm-generic/io.h | 2 +-
8 files changed, 256 insertions(+), 10 deletions(-)
create mode 100644 arch/arm64/include/asm/pci.h
create mode 100644 arch/arm64/kernel/pci.c
--
1.9.0
Hello,
We will be holding a one-day, ARM kernel mini-summit at ELC this year in
San Jose[1]. The mini-summit will be Monday, April 28th, and ELC starts
on Tuesday.
The ARM summit brings together maintainers and developers in the ARM
community face to face to discuss current work and to plan for what is
coming next. To keep the group small and encourage open discussion the
event is invite-only.
To propose a discussion topic and/or request an invitation:
1) subscribe yourself to arm-summit-discuss(a)lists.infradead.org:
http://lists.infradead.org/mailman/listinfo/arm-summit-discuss
2) send your invite request and/or topic proposal to
arm-summit-discuss(a)lists.infradead.org with a subject prefix of
"[ARM ATTEND]". Also, please Cc the main linux-arm-kernel list.
All topics and invitation requests will be reviewed by the program
committee and decisions will be made by the end of March, so please get
your requests/topics in soon.
ARM mini-summit Program Committee,
Arnd Bergmann
Magnus Damm
Kevin Hilman
Simon Horman
Olof Johansson
Grant Likely
[1] http://events.linuxfoundation.org/events/embedded-linux-conference
Add AARCH64 specific support. This includes the following:
- AARCH64 perf registers definition and hooks,
- compat mode registers use, i.e. profiling a 32-bit binary on
a 64-bit system,
- unwinding using the dwarf information from the .debug_frame
section of the ELF binary,
- unwinding using the frame pointer information; in 64-bit and
compat modes.
Notes:
- the tools/perf change is submitted separately on LKML,
- support for unwinding using the dwarf information in compat
mode requires some changes to the libunwind code. Those changes
have been submitted on the libunwind ML and are in discussion.
Tested on ARMv7, ARMv8 and x86_64 platforms. The compat mode has been
tested on ARMv8 using statically built 32-bit binaries.
Jean Pihet (3):
ARM64: perf: add support for perf registers API
ARM64: perf: add support for frame pointer unwinding in compat mode
ARM64: perf: support dwarf unwinding in compat mode
arch/arm64/Kconfig | 2 +
arch/arm64/include/asm/compat.h | 2 +-
arch/arm64/include/asm/ptrace.h | 3 +-
arch/arm64/include/uapi/asm/Kbuild | 1 +
arch/arm64/include/uapi/asm/perf_regs.h | 40 ++++++++++++++++++
arch/arm64/kernel/Makefile | 1 +
arch/arm64/kernel/perf_event.c | 75 +++++++++++++++++++++++++++++----
arch/arm64/kernel/perf_regs.c | 44 +++++++++++++++++++
8 files changed, 158 insertions(+), 10 deletions(-)
create mode 100644 arch/arm64/include/uapi/asm/perf_regs.h
create mode 100644 arch/arm64/kernel/perf_regs.c
--
1.7.11.7
From: Mark Brown <broonie(a)linaro.org>
regmap should handle any byte ordering issues required, it is looking for
a byte stream from the bus, so don't set 16 bits per word. This is likely
to have tested out OK due to use of an unmerged SPI controller driver.
Signed-off-by: Mark Brown <broonie(a)linaro.org>
---
sound/soc/codecs/tlv320aic23-spi.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/sound/soc/codecs/tlv320aic23-spi.c b/sound/soc/codecs/tlv320aic23-spi.c
index 585aea436c6a..3b387e41d75d 100644
--- a/sound/soc/codecs/tlv320aic23-spi.c
+++ b/sound/soc/codecs/tlv320aic23-spi.c
@@ -25,7 +25,6 @@ static int aic23_spi_probe(struct spi_device *spi)
dev_dbg(&spi->dev, "probing tlv320aic23 spi device\n");
- spi->bits_per_word = 16;
spi->mode = SPI_MODE_0;
ret = spi_setup(spi);
if (ret < 0)
--
1.9.0
