linux.git/arch/mips/ath79, branch v4.19.115

Revert "MIPS: perf: ath79: Fix perfcount IRQ assignment"

2019-06-11T10:20:53+00:00

This reverts commit ca8648816e3dcc8dadba0e79a034f61c85eb206d which is
commit a1e8783db8e0d58891681bc1e6d9ada66eae8e20 upstream.

Petr writes:
	Karl has reported to me today, that he's experiencing weird
	reboot hang on his devices with 4.9.180 kernel and that he has
	bisected it down to my backported patch.

	I would like to kindly ask you for removal of this patch.  This
	patch should be reverted from all stable kernels up to 5.1,
	because perf counters were not broken on those kernels, and this
	patch won't work on the ath79 legacy IRQ code anyway, it needs
	new irqchip driver which was enabled on ath79 with commit
	51fa4f8912c0 ("MIPS: ath79: drop legacy IRQ code").

Reported-by: Petr Štetiar 
Cc: Kevin 'ldir' Darbyshire-Bryant 
Cc: John Crispin 
Cc: Marc Zyngier 
Cc: Paul Burton 
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Thomas Gleixner 
Cc: Jason Cooper 
Cc: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

MIPS: perf: ath79: Fix perfcount IRQ assignment

2019-05-16T17:41:24+00:00

[ Upstream commit a1e8783db8e0d58891681bc1e6d9ada66eae8e20 ]

Currently it's not possible to use perf on ath79 due to genirq flags
mismatch happening on static virtual IRQ 13 which is used for
performance counters hardware IRQ 5.

On TP-Link Archer C7v5:

           CPU0
  2:          0      MIPS   2  ath9k
  4:        318      MIPS   4  19000000.eth
  7:      55034      MIPS   7  timer
  8:       1236      MISC   3  ttyS0
 12:          0      INTC   1  ehci_hcd:usb1
 13:          0  gpio-ath79   2  keys
 14:          0  gpio-ath79   5  keys
 15:         31  AR724X PCI    1  ath10k_pci

 $ perf top
 genirq: Flags mismatch irq 13. 00014c83 (mips_perf_pmu) vs. 00002003 (keys)

On TP-Link Archer C7v4:

         CPU0
  4:          0      MIPS   4  19000000.eth
  5:       7135      MIPS   5  1a000000.eth
  7:      98379      MIPS   7  timer
  8:         30      MISC   3  ttyS0
 12:      90028      INTC   0  ath9k
 13:       5520      INTC   1  ehci_hcd:usb1
 14:       4623      INTC   2  ehci_hcd:usb2
 15:      32844  AR724X PCI    1  ath10k_pci
 16:          0  gpio-ath79  16  keys
 23:          0  gpio-ath79  23  keys

 $ perf top
 genirq: Flags mismatch irq 13. 00014c80 (mips_perf_pmu) vs. 00000080 (ehci_hcd:usb1)

This problem is happening, because currently statically assigned virtual
IRQ 13 for performance counters is not claimed during the initialization
of MIPS PMU during the bootup, so the IRQ subsystem doesn't know, that
this interrupt isn't available for further use.

So this patch fixes the issue by simply booking hardware IRQ 5 for MIPS PMU.

Tested-by: Kevin 'ldir' Darbyshire-Bryant 
Signed-off-by: Petr Štetiar 
Acked-by: John Crispin 
Acked-by: Marc Zyngier 
Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Thomas Gleixner 
Cc: Jason Cooper 
Signed-off-by: Sasha Levin

Merge tag 'mips_4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2018-08-14T02:24:32+00:00

Pull MIPS updates from Paul Burton:
"Here are the main MIPS changes for 4.19.

An overview of the general architecture changes:

- Massive DMA ops refactoring from Christoph Hellwig (huzzah for
deleting crufty code!).

- We introduce NT_MIPS_DSP & NT_MIPS_FP_MODE ELF notes &
corresponding regsets to expose DSP ASE & floating point mode state
respectively, both for live debugging & core dumps.

- We better optimize our code by hard-coding cpu_has_* macros at
compile time where their values are known due to the ISA revision
that the kernel build is targeting.

- The EJTAG exception handler now better handles SMP systems, where
it was previously possible for CPUs to clobber a register value
saved by another CPU.

- Our implementation of memset() gained a couple of fixes for MIPSr6
systems to return correct values in some cases where stores fault.

- We now implement ioremap_wc() using the uncached-accelerated cache
coherency attribute where supported, which is detected during boot,
and fall back to plain uncached access where necessary. The
MIPS-specific (and unused in tree) ioremap_uncached_accelerated() &
ioremap_cacheable_cow() are removed.

- The prctl(PR_SET_FP_MODE, ...) syscall is better supported for SMP
systems by reworking the way we ensure remote CPUs that may be
running threads within the affected process switch mode.

- Systems using the MIPS Coherence Manager will now set the
MIPS_IC_SNOOPS_REMOTE flag to avoid some unnecessary cache
maintenance overhead when flushing the icache.

- A few fixes were made for building with clang/LLVM, which now
sucessfully builds kernels for many of our platforms.

- Miscellaneous cleanups all over.

And some platform-specific changes:

- ar7 gained stubs for a few clock API functions to fix build
failures for some drivers.

- ath79 gained support for a few new SoCs, a few fixes & better
gpio-keys support.

- Ci20 now exposes its SPI bus using the spi-gpio driver.

- The generic platform can now auto-detect a suitable value for
PHYS_OFFSET based upon the memory map described by the device tree,
allowing us to avoid wasting memory on page book-keeping for
systems where RAM starts at a non-zero physical address.

- Ingenic systems using the jz4740 platform code now link their
vmlinuz higher to allow for kernels of a realistic size.

- Loongson32 now builds the kernel targeting MIPSr1 rather than
MIPSr2 to avoid CPU errata.

- Loongson64 gains a couple of fixes, a workaround for a write
buffering issue & support for the Loongson 3A R3.1 CPU.

- Malta now uses the piix4-poweroff driver to handle powering down.

- Microsemi Ocelot gained support for its SPI bus & NOR flash, its
second MDIO bus and can now be supported by a FIT/.itb image.

- Octeon saw a bunch of header cleanups which remove a lot of
duplicate or unused code"

* tag 'mips_4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (123 commits)
MIPS: Remove remnants of UASM_ISA
MIPS: netlogic: xlr: Remove erroneous check in nlm_fmn_send()
MIPS: VDSO: Force link endianness
MIPS: Always specify -EB or -EL when using clang
MIPS: Use dins to simplify __write_64bit_c0_split()
MIPS: Use read-write output operand in __write_64bit_c0_split()
MIPS: Avoid using array as parameter to write_c0_kpgd()
MIPS: vdso: Allow clang's --target flag in VDSO cflags
MIPS: genvdso: Remove GOT checks
MIPS: Remove obsolete MIPS checks for DST node "chosen@0"
MIPS: generic: Remove input symbols from defconfig
MIPS: Delete unused code in linux32.c
MIPS: Remove unused sys_32_mmap2
MIPS: Remove nabi_no_regargs
mips: dts: mscc: enable spi and NOR flash support on ocelot PCB123
mips: dts: mscc: Add spi on Ocelot
MIPS: Loongson: Merge load addresses
MIPS: Loongson: Set Loongson32 to MIPS32R1
MIPS: mscc: ocelot: add interrupt controller properties to GPIO controller
MIPS: generic: Select MIPS_AUTO_PFN_OFFSET
...

MIPS: ath79: enable uart during early_prink

2018-07-25T02:07:42+00:00

This patch ensures, that the pinmux register is properly setup for the
boot console UART when early_printk is enabled.

[paul.burton@mips.com:
  - s/poinmux/pinmux/
  - s/uart/UART/
  - Drop extraneous parentheses.]

Signed-off-by: Gabor Juhos 
Signed-off-by: John Crispin 
Signed-off-by: Paul Burton 
Cc: James Hogan 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org

MIPS: ath79: fix system restart

2018-07-25T01:57:49+00:00

This patch disables irq on reboot to fix hang issues that were observed
due to pending interrupts.

Signed-off-by: Felix Fietkau 
Signed-off-by: John Crispin 
Signed-off-by: Paul Burton 
Patchwork: https://patchwork.linux-mips.org/patch/19913/
Cc: James Hogan 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org

MIPS: ath79: add support for QCA953x QCA956x TP9343

2018-07-25T01:57:26+00:00

This patch adds support for 2 new types of QCA silicon. TP9343 is
essentially the same as the QCA956X but is licensed by TPLink.

Signed-off-by: Weijie Gao 
Signed-off-by: Matthias Schiffer 
Signed-off-by: John Crispin 
Signed-off-by: Paul Burton 
Patchwork: https://patchwork.linux-mips.org/patch/19911/
Cc: James Hogan 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org

MIPS: ath79: fix register address in ath79_ddr_wb_flush()

2018-07-20T17:17:04+00:00

ath79_ddr_wb_flush_base has the type void __iomem *, so register offsets
need to be a multiple of 4 in order to access the intended register.

Signed-off-by: Felix Fietkau 
Signed-off-by: John Crispin 
Signed-off-by: Paul Burton 
Fixes: 24b0e3e84fbf ("MIPS: ath79: Improve the DDR controller interface")
Patchwork: https://patchwork.linux-mips.org/patch/19912/
Cc: Alban Bedel 
Cc: James Hogan 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # 4.2+

mips: unify prom_putchar() declarations

2018-07-17T16:40:17+00:00

prom_putchar() is used centrally in early printk infrastructure therefore
at least MIPS should agree on the function return type.

[paul.burton@mips.com:
  - Include linux/types.h in asm/setup.h to gain the bool typedef before
    we start include asm/setup.h elsewhere.
  - Include asm/setup.h in all files that use or define prom_putchar().
  - Also standardise on signed rather than unsigned char argument.]

Signed-off-by: Alexander Sverdlin 
Signed-off-by: Paul Burton 
Patchwork: https://patchwork.linux-mips.org/patch/19842/
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Jonas Gorski 
Cc: Florian Fainelli 
Cc: Kate Stewart 
Cc: Philippe Ombredanne

MIPS: pb44: Fix i2c-gpio GPIO descriptor table

2018-06-18T21:19:50+00:00

I used bad names in my clumsiness when rewriting many board
files to use GPIO descriptors instead of platform data. A few
had the platform_device ID set to -1 which would indeed give
the device name "i2c-gpio".

But several had it set to >=0 which gives the names
"i2c-gpio.0", "i2c-gpio.1" ...

Fix the one affected board in the MIPS tree. Sorry.

Fixes: b2e63555592f ("i2c: gpio: Convert to use descriptors")
Reported-by: Simon Guinot 
Signed-off-by: Linus Walleij 
Reviewed-by: Paul Burton 
Cc: Ralf Baechle 
Cc: Wolfram Sang 
Cc: Simon Guinot 
Cc: linux-mips@linux-mips.org
Cc:  # 4.15+
Patchwork: https://patchwork.linux-mips.org/patch/19387/
Signed-off-by: James Hogan

Merge branch 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2017-11-15T01:52:21+00:00

Pull i2c updates from Wolfram Sang:
 "This contains two bigger than usual tree-wide changes this time. They
  all have proper acks, caused no merge conflicts in linux-next where
  they have been for a while. They are namely:

   - to-gpiod conversion of the i2c-gpio driver and its users (touching
     arch/* and drivers/mfd/*)

   - adding a sbs-manager based on I2C core updates to SMBus alerts
     (touching drivers/power/*)

  Other notable changes:

   - i2c_boardinfo can now carry a dev_name to be used when the device
     is created. This is because some devices in ACPI world need fixed
     names to find the regulators.

   - the designware driver got a long discussed overhaul of its PM
     handling. img-scb and davinci got PM support, too.

   - at24 driver has way better OF support. And it has a new maintainer.
     Thanks Bartosz for stepping up!

  The rest is regular driver updates and fixes"

* 'i2c/for-4.15' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (55 commits)
  ARM: sa1100: simpad: Correct I2C GPIO offsets
  i2c: aspeed: Deassert reset in probe
  eeprom: at24: Add OF device ID table
  MAINTAINERS: new maintainer for AT24 driver
  i2c: nuc900: remove platform_data, too
  i2c: thunderx: Remove duplicate NULL check
  i2c: taos-evm: Remove duplicate NULL check
  i2c: Make i2c_unregister_device() NULL-aware
  i2c: xgene-slimpro: Support v2
  i2c: mpc: remove useless variable initialization
  i2c: omap: Trigger bus recovery in lockup case
  i2c: gpio: Add support for named gpios in DT
  dt-bindings: i2c: i2c-gpio: Add support for named gpios
  i2c: gpio: Local vars in probe
  i2c: gpio: Augment all boardfiles to use open drain
  i2c: gpio: Enforce open drain through gpiolib
  gpio: Make it possible for consumers to enforce open drain
  i2c: gpio: Convert to use descriptors
  power: supply: sbs-message: fix some code style issues
  power: supply: sbs-battery: remove unchecked return var
  ...