linux-stable.git/drivers/spi, branch v5.4.4

spi: Fix NULL pointer when setting SPI_CS_HIGH for GPIO CS

2019-12-13T07:43:15+00:00

commit 15f794bd977a0135328fbdd8a83cc64c1d267b39 upstream.

Even if the flag use_gpio_descriptors is set, it is possible that
cs_gpiods was not allocated, which leads to a kernel crash.

Reported-by: "kernelci.org bot" 
Fixes: 3e5ec1db8bfe ("spi: Fix SPI_CS_HIGH setting when using native and GPIO CS")
Signed-off-by: Gregory CLEMENT 
Link: https://lore.kernel.org/r/20191024141309.22434-1-gregory.clement@bootlin.com
Signed-off-by: Mark Brown 
Cc: 
Signed-off-by: Greg Kroah-Hartman

spi: Fix SPI_CS_HIGH setting when using native and GPIO CS

2019-12-13T07:43:14+00:00

commit 3e5ec1db8bfee845d9f8560d1c64aeaccd586398 upstream.

When improving the CS GPIO support at core level, the SPI_CS_HIGH
has been enabled for all the CS lines used for a given SPI controller.

However, the SPI framework allows to have on the same controller native
CS and GPIO CS. The native CS may not support the SPI_CS_HIGH, so they
should not be setup automatically.

With this patch the setting is done only for the CS that will use a
GPIO as CS

Fixes: f3186dd87669 ("spi: Optionally use GPIO descriptors for CS GPIOs")
Cc: 
Signed-off-by: Gregory CLEMENT 
Link: https://lore.kernel.org/r/20191018152929.3287-1-gregory.clement@bootlin.com
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

spi: atmel: Fix CS high support

2019-12-13T07:43:13+00:00

commit 7cbb16b2122c09f2ae393a1542fed628505b9da6 upstream.

Until a few years ago, this driver was only used with CS GPIO. The
only exception is CS0 on AT91RM9200 which has to use internal CS. A
limitation of the internal CS is that they don't support CS High.

So by using the CS GPIO the CS high configuration was available except
for the particular case CS0 on RM9200.

When the support for the internal chip-select was added, the check of
the CS high support was not updated. Due to this the driver accepts
this configuration for all the SPI controller v2 (used by all SoCs
excepting the AT91RM9200) whereas the hardware doesn't support it for
infernal CS.

This patch fixes the test to match the hardware capabilities.

Fixes: 4820303480a1 ("spi: atmel: add support for the internal chip-select of the spi controller")
Cc: 
Signed-off-by: Gregory CLEMENT 
Link: https://lore.kernel.org/r/20191017141846.7523-3-gregory.clement@bootlin.com
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

spi: stm32-qspi: Fix kernel oops when unbinding driver

2019-12-13T07:43:13+00:00

commit 3c0af1dd2fe78adc02fe21f6cfe7d6cb8602573e upstream.

spi_master_put() must only be called in .probe() in case of error.

As devm_spi_register_master() is used during probe, spi_master_put()
mustn't be called in .remove() callback.

It fixes the following kernel WARNING/Oops when executing
echo "58003000.spi" > /sys/bus/platform/drivers/stm32-qspi/unbind :

------------[ cut here ]------------
WARNING: CPU: 1 PID: 496 at fs/kernfs/dir.c:1504 kernfs_remove_by_name_ns+0x9c/0xa4
kernfs: can not remove 'uevent', no directory
Modules linked in:
CPU: 1 PID: 496 Comm: sh Not tainted 5.3.0-rc1-00219-ga0e07bb51a37 #62
Hardware name: STM32 (Device Tree Support)
[] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[] (show_stack) from [] (dump_stack+0xb4/0xc8)
[] (dump_stack) from [] (__warn.part.3+0xbc/0xd8)
[] (__warn.part.3) from [] (warn_slowpath_fmt+0x68/0x8c)
[] (warn_slowpath_fmt) from [] (kernfs_remove_by_name_ns+0x9c/0xa4)
[] (kernfs_remove_by_name_ns) from [] (device_del+0x128/0x358)
[] (device_del) from [] (device_unregister+0x24/0x64)
[] (device_unregister) from [] (spi_unregister_controller+0x88/0xe8)
[] (spi_unregister_controller) from [] (release_nodes+0x1bc/0x200)
[] (release_nodes) from [] (device_release_driver_internal+0xec/0x1ac)
[] (device_release_driver_internal) from [] (unbind_store+0x60/0xd4)
[] (unbind_store) from [] (kernfs_fop_write+0xe8/0x1c4)
[] (kernfs_fop_write) from [] (__vfs_write+0x2c/0x1c0)
[] (__vfs_write) from [] (vfs_write+0xa4/0x184)
[] (vfs_write) from [] (ksys_write+0x58/0xd0)
[] (ksys_write) from [] (ret_fast_syscall+0x0/0x54)
Exception stack(0xdd289fa8 to 0xdd289ff0)
9fa0:                   0000006c 000e20e8 00000001 000e20e8 0000000d 00000000
9fc0: 0000006c 000e20e8 b6f87da0 00000004 0000000d 0000000d 00000000 00000000
9fe0: 00000004 bee639b0 b6f2286b b6eaf6c6
---[ end trace 1b15df8a02d76aef ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 496 at fs/kernfs/dir.c:1504 kernfs_remove_by_name_ns+0x9c/0xa4
kernfs: can not remove 'online', no directory
Modules linked in:
CPU: 1 PID: 496 Comm: sh Tainted: G        W         5.3.0-rc1-00219-ga0e07bb51a37 #62
Hardware name: STM32 (Device Tree Support)
[] (unwind_backtrace) from [] (show_stack+0x10/0x14)
[] (show_stack) from [] (dump_stack+0xb4/0xc8)
[] (dump_stack) from [] (__warn.part.3+0xbc/0xd8)
[] (__warn.part.3) from [] (warn_slowpath_fmt+0x68/0x8c)
[] (warn_slowpath_fmt) from [] (kernfs_remove_by_name_ns+0x9c/0xa4)
[] (kernfs_remove_by_name_ns) from [] (device_remove_attrs+0x20/0x5c)
[] (device_remove_attrs) from [] (device_del+0x134/0x358)
[] (device_del) from [] (device_unregister+0x24/0x64)
[] (device_unregister) from [] (spi_unregister_controller+0x88/0xe8)
[] (spi_unregister_controller) from [] (release_nodes+0x1bc/0x200)
[] (release_nodes) from [] (device_release_driver_internal+0xec/0x1ac)
[] (device_release_driver_internal) from [] (unbind_store+0x60/0xd4)
[] (unbind_store) from [] (kernfs_fop_write+0xe8/0x1c4)
[] (kernfs_fop_write) from [] (__vfs_write+0x2c/0x1c0)
[] (__vfs_write) from [] (vfs_write+0xa4/0x184)
[] (vfs_write) from [] (ksys_write+0x58/0xd0)
[] (ksys_write) from [] (ret_fast_syscall+0x0/0x54)
Exception stack(0xdd289fa8 to 0xdd289ff0)
9fa0:                   0000006c 000e20e8 00000001 000e20e8 0000000d 00000000
9fc0: 0000006c 000e20e8 b6f87da0 00000004 0000000d 0000000d 00000000 00000000
9fe0: 00000004 bee639b0 b6f2286b b6eaf6c6
---[ end trace 1b15df8a02d76af0 ]---
8<--- cut here ---
Unable to handle kernel NULL pointer dereference at virtual address 00000050
pgd = e612f14d
[00000050] *pgd=ff1f5835
Internal error: Oops: 17 [#1] SMP ARM
Modules linked in:
CPU: 1 PID: 496 Comm: sh Tainted: G        W         5.3.0-rc1-00219-ga0e07bb51a37 #62
Hardware name: STM32 (Device Tree Support)
PC is at kernfs_find_ns+0x8/0xfc
LR is at kernfs_find_and_get_ns+0x30/0x48
pc : []    lr : []    psr: 40010013
sp : dd289dac  ip : 00000000  fp : 00000000
r10: 00000000  r9 : def6ec58  r8 : dd289e54
r7 : 00000000  r6 : c0abb234  r5 : 00000000  r4 : c0d26a30
r3 : ddab5080  r2 : 00000000  r1 : c0abb234  r0 : 00000000
Flags: nZcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
Control: 10c5387d  Table: dd11c06a  DAC: 00000051
Process sh (pid: 496, stack limit = 0xe13a592d)
Stack: (0xdd289dac to 0xdd28a000)
9da0:                            c0d26a30 00000000 c0abb234 00000000 c02e4ac8
9dc0: 00000000 c0976b44 def6ec00 dea53810 dd289e54 c02e864c c0a61a48 c0a4a5ec
9de0: c0d630a8 def6ec00 c0d04c48 c02e86e0 def6ec00 de909338 c0d04c48 c05833b0
9e00: 00000000 c0638144 dd289e54 def59900 00000000 475b3ee5 def6ec00 00000000
9e20: def6ec00 def59b80 dd289e54 def59900 00000000 c05835f8 def6ec00 c0638dac
9e40: 0000000a dea53810 c0d04c48 c058c580 dea53810 def59500 def59b80 475b3ee5
9e60: ddc63e00 dea53810 dea3fe10 c0d63a0c dea53810 ddc63e00 dd289f78 dd240d10
9e80: 00000000 c0588a44 c0d59a20 0000000d c0d63a0c c0586840 0000000d dd240d00
9ea0: 00000000 00000000 ddc63e00 c02e64e8 00000000 00000000 c0d04c48 dd9bbcc0
9ec0: c02e6400 dd289f78 00000000 000e20e8 0000000d c0266b44 00000055 00000cc0
9ee0: 000000e3 000e3000 dd11c000 dd11c000 00000000 00000000 00000000 00000000
9f00: ffeee38c dff99688 00000000 475b3ee5 00000001 dd289fb0 ddab5080 ddaa5800
9f20: 00000817 000e30ec dd9e7720 475b3ee5 ddaa583c 0000000d dd9bbcc0 000e20e8
9f40: dd289f78 00000000 000e20e8 0000000d 00000000 c02694c0 00000000 00000000
9f60: c0d04c48 dd9bbcc0 00000000 00000000 dd9bbcc0 c0269710 00000000 00000000
9f80: 000a91f4 475b3ee5 0000006c 000e20e8 b6f87da0 00000004 c0101204 dd288000
9fa0: 00000004 c0101000 0000006c 000e20e8 00000001 000e20e8 0000000d 00000000
9fc0: 0000006c 000e20e8 b6f87da0 00000004 0000000d 0000000d 00000000 00000000
9fe0: 00000004 bee639b0 b6f2286b b6eaf6c6 600e0030 00000001 00000000 00000000
[] (kernfs_find_ns) from [] (0xdef6ec00)
Code: ebf8eeab c0dc50b8 e92d40f0 e292c000 (e1d035b0)
---[ end trace 1b15df8a02d76af1 ]---

Fixes: a88eceb17ac7 ("spi: stm32-qspi: add spi_master_put in release function")
Cc: 
Signed-off-by: Patrice Chotard 
Link: https://lore.kernel.org/r/20191004123606.17241-1-patrice.chotard@st.com
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

spi: spi-fsl-qspi: Clear TDH bits in FLSHCR register

2019-12-13T07:43:12+00:00

commit f6910679e17ad4915f008bd2c614d38052426f7c upstream.

Later versions of the QSPI controller (e.g. in i.MX6UL/ULL and i.MX7)
seem to have an additional TDH setting in the FLSHCR register, that
needs to be set in accordance with the access mode that is used (DDR
or SDR).

Previous bootstages such as BootROM or bootloader might have used the
DDR mode to access the flash. As we currently only use SDR mode, we
need to make sure the TDH bits are cleared upon initialization.

Fixes: 84d043185dbe ("spi: Add a driver for the Freescale/NXP QuadSPI controller")
Cc: 
Signed-off-by: Frieder Schrempf 
Acked-by: Han Xu 
Link: https://lore.kernel.org/r/20191007071933.26786-1-frieder.schrempf@kontron.de
Signed-off-by: Mark Brown 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'leds-for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds

2019-09-18T01:40:42+00:00

Pull LED updates from Jacek Anaszewski:
 "In this cycle we've finally managed to contribute the patch set
  sorting out LED naming issues. Besides that there are many changes
  scattered among various LED class drivers and triggers.

  LED naming related improvements:

   - add new 'function' and 'color' fwnode properties and deprecate
     'label' property which has been frequently abused for conveying
     vendor specific names that have been available in sysfs anyway

   - introduce a set of standard LED_FUNCTION* definitions

   - introduce a set of standard LED_COLOR_ID* definitions

   - add a new {devm_}led_classdev_register_ext() API with the
     capability of automatic LED name composition basing on the
     properties available in the passed fwnode; the function is
     backwards compatible in a sense that it uses 'label' data, if
     present in the fwnode, for creating LED name

   - add tools/leds/get_led_device_info.sh script for retrieving LED
     vendor, product and bus names, if applicable; it also performs
     basic validation of an LED name

   - update following drivers and their DT bindings to use the new LED
     registration API:

        - leds-an30259a, leds-gpio, leds-as3645a, leds-aat1290, leds-cr0014114,
          leds-lm3601x, leds-lm3692x, leds-lp8860, leds-lt3593, leds-sc27xx-blt

  Other LED class improvements:

   - replace {devm_}led_classdev_register() macros with inlines

   - allow to call led_classdev_unregister() unconditionally

   - switch to use fwnode instead of be stuck with OF one

  LED triggers improvements:

   - led-triggers:
        - fix dereferencing of null pointer
        - fix a memory leak bug

   - ledtrig-gpio:
        - GPIO 0 is valid

  Drop superseeded apu2/3 support from leds-apu since for apu2+ a newer,
  more complete driver exists, based on a generic driver for the AMD
  SOCs gpio-controller, supporting LEDs as well other devices:

   - drop profile field from priv data

   - drop iosize field from priv data

   - drop enum_apu_led_platform_types

   - drop superseeded apu2/3 led support

   - add pr_fmt prefix for better log output

   - fix error message on probing failure

  Other misc fixes and improvements to existing LED class drivers:

   - leds-ns2, leds-max77650:
        - add of_node_put() before return

   - leds-pwm, leds-is31fl32xx:
        - use struct_size() helper

   - leds-lm3697, leds-lm36274, leds-lm3532:
        - switch to use fwnode_property_count_uXX()

   - leds-lm3532:
        - fix brightness control for i2c mode
        - change the define for the fs current register
        - fixes for the driver for stability
        - add full scale current configuration
        - dt: Add property for full scale current.
        - avoid potentially unpaired regulator calls
        - move static keyword to the front of declarations
        - fix optional led-max-microamp prop error handling

   - leds-max77650:
        - add of_node_put() before return
        - add MODULE_ALIAS()
        - Switch to fwnode property API

   - leds-as3645a:
        - fix misuse of strlcpy

   - leds-netxbig:
        - add of_node_put() in netxbig_leds_get_of_pdata()
        - remove legacy board-file support

   - leds-is31fl319x:
        - simplify getting the adapter of a client

   - leds-ti-lmu-common:
        - fix coccinelle issue
        - move static keyword to the front of declaration

   - leds-syscon:
        - use resource managed variant of device register

   - leds-ktd2692:
        - fix a typo in the name of a constant

   - leds-lp5562:
        - allow firmware files up to the maximum length

   - leds-an30259a:
        - fix typo

   - leds-pca953x:
        - include the right header"

* tag 'leds-for-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds: (72 commits)
  leds: lm3532: Fix optional led-max-microamp prop error handling
  led: triggers: Fix dereferencing of null pointer
  leds: ti-lmu-common: Move static keyword to the front of declaration
  leds: lm3532: Move static keyword to the front of declarations
  leds: trigger: gpio: GPIO 0 is valid
  leds: pwm: Use struct_size() helper
  leds: is31fl32xx: Use struct_size() helper
  leds: ti-lmu-common: Fix coccinelle issue in TI LMU
  leds: lm3532: Avoid potentially unpaired regulator calls
  leds: syscon: Use resource managed variant of device register
  leds: Replace {devm_}led_classdev_register() macros with inlines
  leds: Allow to call led_classdev_unregister() unconditionally
  leds: lm3532: Add full scale current configuration
  dt: lm3532: Add property for full scale current.
  leds: lm3532: Fixes for the driver for stability
  leds: lm3532: Change the define for the fs current register
  leds: lm3532: Fix brightness control for i2c mode
  leds: Switch to use fwnode instead of be stuck with OF one
  leds: max77650: Switch to fwnode property API
  led: triggers: Fix a memory leak bug
  ...

Merge tag 'docs-5.4' of git://git.lwn.net/linux

2019-09-17T23:22:26+00:00

Pull documentation updates from Jonathan Corbet:
 "It's a somewhat calmer cycle for docs this time, as the churn of the
  mass RST conversion is happily mostly behind us.

   - A new document on reproducible builds.

   - We finally got around to zapping the documentation for hardware
     support that was removed in 2004; one doesn't want to rush these
     things.

   - The usual assortment of fixes, typo corrections, etc"

* tag 'docs-5.4' of git://git.lwn.net/linux: (67 commits)
  Documentation: kbuild: Add document about reproducible builds
  docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]
  Documentation: Add "earlycon=sbi" to the admin guide
  doc:lock: remove reference to clever use of read-write lock
  devices.txt: improve entry for comedi (char major 98)
  docs: mtd: Update spi nor reference driver
  doc: arm64: fix grammar dtb placed in no attributes region
  Documentation: sysrq: don't recommend 'S' 'U' before 'B'
  mailmap: Update email address for Quentin Perret
  docs: ftrace: clarify when tracing is disabled by the trace file
  docs: process: fix broken link
  Documentation/arm/samsung-s3c24xx: Remove stray U+FEFF character to fix title
  Documentation/arm/sa1100/assabet: Fix 'make assabet_defconfig' command
  Documentation/arm/sa1100: Remove some obsolete documentation
  docs/zh_CN: update Chinese howto.rst for latexdocs making
  Documentation: virt: Fix broken reference to virt tree's index
  docs: Fix typo on pull requests guide
  kernel-doc: Allow anonymous enum
  Documentation: sphinx: Don't parse socket() as identifier reference
  Documentation: sphinx: Add missing comma to list of strings
  ...

Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2019-09-16T22:52:38+00:00

Pull ARM SoC driver updates from Arnd Bergmann:
 "This contains driver changes that are tightly connected to SoC
  specific code. Aside from smaller cleanups and bug fixes, here is a
  list of the notable changes.

  New device drivers:

   - The Turris Mox router has a new "moxtet" bus driver for its
     on-board pluggable extension bus. The same platform also gains a
     firmware driver.

   - The Samsung Exynos family gains a new Chipid driver exporting using
     the soc device sysfs interface

   - A similar socinfo driver for Qualcomm Snapdragon chips.

   - A firmware driver for the NXP i.MX DSP IPC protocol using shared
     memory and a mailbox

  Other changes:

   - The i.MX reset controller driver now supports the NXP i.MX8MM chip

   - Amlogic SoC specific drivers gain support for the S905X3 and A311D
     chips

   - A rework of the TI Davinci framebuffer driver to allow important
     cleanups in the platform code

   - A couple of device drivers for removed ARM SoC platforms are
     removed. Most of the removals were picked up by other maintainers,
     this contains whatever was left"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (123 commits)
  bus: uniphier-system-bus: use devm_platform_ioremap_resource()
  soc: ti: ti_sci_pm_domains: Add support for exclusive and shared access
  dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared access
  firmware: ti_sci: Allow for device shared and exclusive requests
  bus: imx-weim: remove incorrect __init annotations
  fbdev: remove w90x900/nuc900 platform drivers
  spi: remove w90x900 driver
  net: remove w90p910-ether driver
  net: remove ks8695 driver
  firmware: turris-mox-rwtm: Add sysfs documentation
  firmware: Add Turris Mox rWTM firmware driver
  dt-bindings: firmware: Document cznic,turris-mox-rwtm binding
  bus: moxtet: fix unsigned comparison to less than zero
  bus: moxtet: remove set but not used variable 'dummy'
  ARM: scoop: Use the right include
  dt-bindings: power: add Amlogic Everything-Else power domains bindings
  soc: amlogic: Add support for Everything-Else power domains controller
  fbdev: da8xx: use resource management for dma
  fbdev: da8xx-fb: drop a redundant if
  fbdev: da8xx-fb: use devm_platform_ioremap_resource()
  ...

Merge branch 'spi-5.4' into spi-next

2019-09-15T09:32:06+00:00

Merge branch 'spi-5.3' into spi-linus

2019-09-15T09:32:04+00:00