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'->set_dev_mode()' callback of clockevent drivers gets called when core tries to
change 'mode' of a clockevent device. Clockevent drivers should change to the
requested mode unless mode isn't supported by driver.
Ideally, drivers shouldn't change state/mode of clockevent devices when the
requested mode isn't supported by driver and the clockevent device should
continue to work as if nothing happened.
But, few clockevent drivers are always disabling events from their
->set_dev_mode() callbacks and they stay disabled for 'default case' (we reach
here for unsupported modes only) as well.
For these drivers, clockevents core wouldn't be sure about state/mode of
clockevent device once ->set_dev_mode() failed and we *may* see some strange
behavior as the clockevent device isn't configured to the right mode by kernel
again.
This patch tries to make sure such drivers don't left events disabled for
unsupported modes.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org>
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Few clockevents drivers have 'switch cases' for ONESHOT or PERIODIC modes, when
these modes aren't supported by '.features' field of 'struct
clock_event_device'. These drivers are doing WARN()/BUG()/pr_err()/empty/etc for
these cases.
Its guaranteed that core wouldn't try to set PERIODIC/ONESHOT modes if they
aren't specified by '.features' field for a particular driver. And if this
happens due to some bug at driver/core, then we do have proper handling at core
level (i.e. WARN_ON_ONCE()) while calling ->set_dev_mode().
Drivers can be simplified by removing code around these unsupported cases and
fall-back to 'default case' and return -ENOSYS.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org>
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Clockevents core now supports ->set_dev_mode() (as a replacement to
->set_mode()), with capability to return error codes.
Migrate all ARM specific clockevent drivers to implement this new callback.
Drivers now return -ENOSYS when a unsupported mode is passed to their
->set_dev_mode() callbacks and return 0 on success.
Most of the changes are automated with help of Coccinelle
(http://coccinelle.lip6.fr/) and the ones left are around the switch block which
are handled manually.
Some drivers had a WARN()/BUG()/pr_err()/empty-implementation for unsupported
modes. These statements and unsupported modes are removed now as proper error
handling with a WARN_ON() is done at clockevents core.
A simplified version of the semantic patch is:
@@
identifier m,c,setmode;
@@
-void
+int
setmode(enum clock_event_mode m, struct clock_event_device *c);
@@
identifier setmode;
@@
-void
+int
setmode(enum clock_event_mode, struct clock_event_device *);
@fixret@
identifier m,c,setmode;
@@
-void
+int
setmode(enum clock_event_mode m, struct clock_event_device *c)
{
...
+ return 0;
}
@depends on fixret@
identifier ced;
identifier fixret.setmode;
@@
... struct clock_event_device ced = {
...,
-.set_mode
+.set_dev_mode
= setmode,
};
@depends on fixret@
expression ced;
identifier fixret.setmode;
@@
- ced->set_mode
+ ced->set_dev_mode
= setmode
@depends on fixret@
identifier fixret.setmode;
@@
{
.
-set_mode
+set_dev_mode
= setmode
}
@depends on fixret@
expression ced;
identifier fixret.setmode;
@@
- ced.set_mode
+ ced.set_dev_mode
= setmode
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Santosh Shukla <santosh.shukla@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform changes from Olof Johansson:
"New core SoC-specific changes.
New platforms:
* Introduction of a vendor, Hisilicon, and one of their SoCs with
some random numerical product name.
* Introduction of EFM32, embedded platform from Silicon Labs (ARMv7m,
i.e. !MMU).
* Marvell Berlin series of SoCs, which include the one in Chromecast.
* MOXA platform support, ARM9-based platform used mostly in
industrial products
* Support for Freescale's i.MX50 SoC.
Other work:
* Renesas work for new platforms and drivers, and conversion over to
more multiplatform-friendly device registration schemes.
* SMP support for Allwinner sunxi platforms.
* ... plus a bunch of other stuff across various platforms"
* tag 'soc-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (201 commits)
ARM: tegra: fix tegra_powergate_sequence_power_up() inline
ARM: msm_defconfig: Update for multi-platform
ARM: msm: Move MSM's DT based hardware to multi-platform support
ARM: msm: Only build timer.c if required
ARM: msm: Only build clock.c on proc_comm based platforms
ARM: ux500: Enable system suspend with WFI support
ARM: ux500: turn on PRINTK_TIME in u8500_defconfig
ARM: shmobile: r8a7790: Fix I2C controller names
ARM: msm: Simplify ARCH_MSM_DT config
ARM: msm: Add support for MSM8974 SoC
ARM: sunxi: select ARM_PSCI
MAINTAINERS: Update Allwinner sunXi maintainer files
ARM: sunxi: Select RESET_CONTROLLER
ARM: imx: improve the comment of CCM lpm SW workaround
ARM: imx: improve status check of clock gate
ARM: imx: add necessary interface for pfd
ARM: imx_v6_v7_defconfig: Select CONFIG_REGULATOR_PFUZE100
ARM: imx_v6_v7_defconfig: Select MX35 and MX50 device tree support
ARM: imx: Add cpu frequency scaling support
ARM i.MX35: Add devicetree support.
...
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This is a complex patch for refactoring CLPS711X serial driver.
Major changes:
- Eliminate <mach/hardware.h> usage.
- Devicetree support.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The 32 bit sched_clock interface now supports 64 bits. Upgrade to
the 64 bit function to allow us to remove the 32 bit registration
interface.
Cc: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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The sched_clock.h include is under include/linux now.
Cc: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
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The keyboard driver for the CLPS711X platform is missing, so there
is no need to call iotable_init() for this memory region.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch removes incorrect config symbols checking since these
symbols not contain "CONFIG_" prefix. Anyway, checking is unneeded
here and this patch remove it completely.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch removes support for the fortunet board.
This board is not maintained by long time and it seems
no one is not using it.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This is a partial revert of the patch:
"6597619f9c ARM: clps711x: Add support for SYSCON driver".
No reason to make SYSCON driver name unique to that processor.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Preparing to move the parsing of reboot= to generic kernel code forces
the change in reboot_mode handling to use the enum.
[akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
Signed-off-by: Robin Holt <holt@sgi.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Russ Anderson <rja@sgi.com>
Cc: Robin Holt <holt@sgi.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch adds support for SYSCON driver for CLPS711X targets.
At this time there are no users for this driver, but it is will
be used as start point to use in CLPS711X drivers and remove
<mach/xx> dependencies.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch provide control LCD backlight via PWM. GPIO is used
only for switch backlight ON and OFF.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch modify interrupt handler for processing all penging interrupts
at once.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch provide migration to using "mtd-ram" driver instead of using
special driver for handling NVRAM memory.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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We do not have driver for Up/Down digital potentiometer (DPOT), so
just define pins as GPIOs and export these pins to user.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This clock will be used in audio subsystem. Since audio cannot work
without PLL we should indicate this.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch removes dependency of NEED_MACH_MEMORY_H for CLPS711X-target.
Since some board may have memory holes, define ARCH_HAS_HOLES_MEMORYMODEL
for these boards.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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arch_initcall was been removed from GPIO driver, so this patch
re-add support for GPIO into boards as platform_device.
Since some drivers (spi, nand, etc.) is not support deferred probe,
separate machine init calls is used in board code to make proper
loading sequence.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.linaro.org/people/shawnguo/linux-2.6 into next/cleanup
From Shawn Guo:
The series cleans up ARCH_HAS_DECOMP_WDOG and arch_decomp_wdog which
are unused on ARM architecure. Samsung has some code setting up wdog
in arch_decomp_wdog(). But since CONFIG_S3C_BOOT_WATCHDOG is defined
nowhere, it will not run. Otherwise, system can not boot at all when
wdog is set up but no one pats it.
* tag 'cleanup-decompwdog-3.9' of git://git.linaro.org/people/shawnguo/linux-2.6:
ARM: samsung: remove unused arch_decomp_wdog() code
ARM: remove unused arch_decomp_wdog()
ARM: decompress: remove unused ARCH_HAS_DECOMP_WDOG
Signed-off-by: Olof Johansson <olof@lixom.net>
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With ARCH_HAS_DECOMP_WDOG removed from arch/arm/boot/compressed/decompress.c,
all the arch_decomp_wdog() definition at platform level is unneeded.
Remmove it.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Jason Cooper <jason@lakedaemon.net>
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Now that the only field in struct sys_timer is .init, delete the struct,
and replace the machine descriptor .timer field with the initialization
function itself.
This will enable moving timer drivers into drivers/clocksource without
having to place a public prototype of each struct sys_timer object into
include/linux; the intent is to create a single of_clocksource_init()
function that determines which timer driver to initialize by scanning
the device dtree, much like the proposed irqchip_init() at:
http://www.spinics.net/lists/arm-kernel/msg203686.html
Includes mach-omap2 fixes from Igor Grinberg.
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch moves the backlight controls for clps711x-framebuffer driver
to the board code. To control we use "generic-bl" driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
[olof: fixed space/tab whitespace in drivers/video/clps711xfb.c]
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch provide migration to using "gpio-nand" driver instead of using
special driver for handling NAND memory.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch moves the power management for clps711x-framebuffer driver
to the board code. To control we use "platform-lcd" driver.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch provide migration to using "gpio-nand" and "basic-mmio-gpio"
drivers instead of using special driver for handling NAND memory.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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CLPS711X-target CPU can have a several FIQ interrupts. With this patch
we adds handling for a one which will be used for ALSA PCM later.
Since FIQ have a separate handler we only add "mask" and "unmask" calls
which will used for enable/disable_irq functions.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch provide migration to using "physmap-flash" and "mtd-ram"
drivers instead of using special driver for handling memory.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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clps711x-framebuffer driver needs to be updated and this is a first step
to make driver better. With this patch we are convert clps711x-framebuffer
to platform device and load this driver from board code.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Instead of manually create LED class device, we will use "leds-gpio"
driver for LED control.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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This patch removes static mappings for ethernet devices. Now we will use
platform_driver for ethernet devices.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This patch make all virtual addresses definition via one macro.
This modification allows to avoid warning "BUG: mapping for 0x80000000
at 0xff000000 out of vmalloc space".
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Reworked IRQ subsystem to be able to use some interrupts
with "End of interrupt" handler.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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