Skip to content

L
linux
Switch branch/tag
  1. 26 Aug, 2015 4 commits
    • Shinobu Uehara's avatar
      pinctrl: sh-pfc: r8a7794: add USB pin groups · 580a7ee9
      Shinobu Uehara authored 
      Add USB0/1 pin groups to R8A7794 PFC driver.
Signed-off-by: default avatarShinobu Uehara <shinobu.uehara.xc@renesas.com>
[Sergei: rebased, renamed, added changelog.]
Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      580a7ee9
    • Geert Uytterhoeven's avatar
      pinctrl: at91: Use generic irq_{request,release}_resources() · 91d33cfe
      Geert Uytterhoeven authored 
      The at91-specific irq_{request,release}_resources() callbacks are
identical to the generic ones, modulo the bug fix in 5b76e79c
("gpiolib: irqchip: prevent driver unloading if gpio is used as irq
only").

Until commit 8b67a1f0 ("gpio: don't override irq_*_resources()
callbacks"), the buggy at91-specific callbacks were never used, though.

Hence drop the at91-specific ones in favor of the generic ones.
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      91d33cfe
    • Mika Westerberg's avatar
      pinctrl: cherryview: Use raw_spinlock for locking · 109fdf15
      Mika Westerberg authored 
      When running -rt kernel and an interrupt happens on a GPIO line controlled by
Intel Cherryview/Braswell pinctrl driver we get:

 BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
 in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/0
 Preemption disabled at:[<ffffffff81092e9f>] cpu_startup_entry+0x17f/0x480

 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.1.5-rt5 #16
  ...
 Call Trace:
  <IRQ>  [<ffffffff816283c6>] dump_stack+0x4a/0x61
  [<ffffffff81077e17>] ___might_sleep+0xe7/0x170
  [<ffffffff8162d6cf>] rt_spin_lock+0x1f/0x50
  [<ffffffff812e52ed>] chv_gpio_irq_ack+0x3d/0xa0
  [<ffffffff810a72f5>] handle_edge_irq+0x75/0x180
  [<ffffffff810a3457>] generic_handle_irq+0x27/0x40
  [<ffffffff812e57de>] chv_gpio_irq_handler+0x7e/0x110
  [<ffffffff810050aa>] handle_irq+0xaa/0x190
  ...

This is because desc->lock is raw_spinlock and is held when chv_gpio_irq_ack()
is called by the genirq core. chv_gpio_irq_ack() in turn takes pctrl->lock
which in -rt is an rt-mutex causing might_sleep() rightfully to complain about
sleeping function called from invalid context.

In order to keep -rt happy but at the same time make sure that register
accesses get serialized, convert the driver to use raw_spinlock instead.
Suggested-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      109fdf15
    • Mika Westerberg's avatar
      pinctrl: baytrail: Use raw_spinlock for locking · 78e1c896
      Mika Westerberg authored 
      The Intel Baytrail pinctrl driver implements irqchip callbacks which are
called with desc->lock raw_spinlock held. In mainline this is fine because
spinlock resolves to raw_spinlock. However, running the same code in -rt we
get:

 BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
 in_atomic(): 1, irqs_disabled(): 1, pid: 0, name: swapper/0
 Preemption disabled at:[<ffffffff81092e9f>] cpu_startup_entry+0x17f/0x480

 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.1.5-rt5 #13
  ...
 Call Trace:
  <IRQ>  [<ffffffff816283c6>] dump_stack+0x4a/0x61
  [<ffffffff81077e17>] ___might_sleep+0xe7/0x170
  [<ffffffff8162d6cf>] rt_spin_lock+0x1f/0x50
  [<ffffffff812e3b88>] byt_gpio_clear_triggering+0x38/0x60
  [<ffffffff812e3bc1>] byt_irq_mask+0x11/0x20
  [<ffffffff810a7013>] handle_level_irq+0x83/0x150
  [<ffffffff810a3457>] generic_handle_irq+0x27/0x40
  [<ffffffff812e3a5f>] byt_gpio_irq_handler+0x7f/0xc0
  [<ffffffff810050aa>] handle_irq+0xaa/0x190
  ...

This is because in -rt spinlocks are preemptible so taking the driver
private spinlock in irqchip callbacks causes might_sleep() to trigger.

In order to keep -rt happy but at the same time make sure that register
accesses get serialized, convert the driver to use raw_spinlock instead.

Also shorten the critical section a bit in few places.
Suggested-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      78e1c896
  3. 25 Aug, 2015 2 commits
  5. 24 Aug, 2015 1 commit
  7. 13 Aug, 2015 9 commits
  9. 11 Aug, 2015 1 commit
  11. 03 Aug, 2015 1 commit
  13. 28 Jul, 2015 4 commits
    • Wei Chen's avatar
      pinctrl: sirf: add power management support for atlas7 · 48356aa7
      Wei Chen authored 
      We had not implemented the pm interface of atlas7 pinctrl
and gpio drivers. So when system resumes from sleep, all
pin configuration and gpio status will be lost.

Now, we implement these interfaces to support pm.

At the same time, this patch also drops a lot of if-else
by look-up table for getting and setting pull.
Signed-off-by: default avatarWei Chen <Wei.Chen@csr.com>
Signed-off-by: default avatarBarry Song <Baohua.Song@csr.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      48356aa7
    • Linus Walleij's avatar
      pinctrl: nomadik: split stn8815 UART0 pin groups · 1051fade
      Linus Walleij authored 
      Split the UART pin groups so we can activate RX/TX, CTS/RTS and
the modem pins (DCD, DSR, RI, DTR) as three different groups
with function u0.
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      1051fade
    • Krzysztof Kozlowski's avatar
      MAINTAINERS: pinctrl: Move Thomas Abraham to CREDITS · dc9ab949
      Krzysztof Kozlowski authored 
      Thomas Abraham's Linaro email address bounces for several months. Also
there were no replies for several emails sent on LKML to his Samsung
address. Move his name to CREDITS.
Signed-off-by: default avatarKrzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Thomas Abraham <thomas.ab@samsung.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Link: http://lkml.org/lkml/2015/6/15/15Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      dc9ab949
    • Rob Herring's avatar
      pinctrl: kill off set_irq_flags usage · 9458120e
      Rob Herring authored 
      set_irq_flags is ARM specific with custom flags which have genirq
equivalents. Convert drivers to use the genirq interfaces directly, so we
can kill off set_irq_flags. The translation of flags is as follows:

IRQF_VALID -> !IRQ_NOREQUEST
IRQF_PROBE -> !IRQ_NOPROBE
IRQF_NOAUTOEN -> IRQ_NOAUTOEN

For IRQs managed by an irqdomain, the irqdomain core code handles clearing
and setting IRQ_NOREQUEST already, so there is no need to do this in
.map() functions and we can simply remove the set_irq_flags calls. Some
users also modify IRQ_NOPROBE and this has been maintained although it
is not clear that is really needed. There appears to be a great deal of
blind copy and paste of this code.
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Lee Jones <lee@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-rpi-kernel@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
      9458120e
  15. 27 Jul, 2015 9 commits
  17. 23 Jul, 2015 3 commits
  19. 17 Jul, 2015 6 commits
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7