linux-toradex.git/arch/arm/mach-omap2/timer.c, branch v4.1

ARM: OMAP2+: Remove bogus struct clk comparison for timer clock

2015-05-11T20:18:19+00:00

With recent changes to use determine_rate, the comparison of two
clocks won't work without clk_is_match that does __clk_get_hw
on the clocks first.

As we've been unconditionally already calling clk_set_parent
already because of the bogus comparison, let's just remove the
check as suggested by Stephen Boyd .

Cc: Michael Turquette 
Cc: Paul Walmsley 
Cc: Tero Kristo 
Cc: Tomeu Vizoso 
Acked-by: Stephen Boyd 
Signed-off-by: Tony Lindgren

Merge tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2015-02-17T17:15:46+00:00

Pull ARM SoC non-critical fixes from Olof Johansson:
 "Here's a small collection of fixes accrued during the last release
  that weren't considered severe enough to merge during the -rc series.

  A few of these are around resurrecting TI81xx support that's been
  broken for quite a while, the rest are smaller fixes -- most for PXA
  but a few across the board.

  There are also some updates to MAINTAINERS here, in particular for
  Broadcom platforms"

* tag 'fixes-non-critical-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (23 commits)
  MAINTAINERS: fix git repositories for Broadcom SoCs
  ARM: pxa: fix broken isa interrupts for zeus and viper
  ARM: DRA7: hwmod: Fix boot crash with DEBUG_LL enabled on UART3
  ARM: OMAP: DRA7: hwmod: Make gpmc software supervised as the smart idle is broken
  ARM: AM43xx: hwmod: set DSS submodule parent hwmods
  ARM: OMAP2+: hwmod: print error if wait_target_ready() failed
  MAINTAINERS: add maintainer for OMAP hwmod data
  ARM: OMAP2+: Disable omap3 PM init for ti81xx
  ARM: OMAP2+: Fix reboot for 81xx
  ARM: OMAP2+: Fix dm814 and dm816 for clocks and timer init
  ARM: OMAP2+: Fix ti81xx class type
  ARM: OMAP2+: Fix ti81xx devtype
  ARM: OMAP2+: Fix error handling for omap2_clk_enable_init_clocks
  MAINTAINERS: add a git entry for BMIPS-based BCM7xxx SoCs
  MAINTAINERS: add a git entry for BCM7xxx ARM-based SoCs
  MAINTAINERS: update Broadcom Cygnus SoC git tree
  MAINTAINERS: move BCM63xx ARM-based SoCs git tree
  hx4700: regulator: declare full constraints
  ARM: pxa: add regulator_has_full_constraints to spitz board file
  ARM: pxa: add regulator_has_full_constraints to poodle board file
  ...

ARM: OMAP2+: Fix dm814 and dm816 for clocks and timer init

2015-01-15T01:37:16+00:00

Fix dm814 and dm816 clocks and timer init.

Cc: Brian Hutchinson 
Cc: Paul Walmsley 
Cc: Tero Kristo 
Signed-off-by: Tony Lindgren

ARM: dra7xx: Fix counter frequency drift for AM572x errata i856

2015-01-05T23:48:03+00:00

Errata i856 for the AM572x (DRA7xx) points out that the 32.768KHz external
crystal is not enabled at power up.  Instead the CPU falls back to using
an emulation for the 32KHz clock which is SYSCLK1/610.  SYSCLK1 is usually
20MHz on boards so far (which gives an emulated frequency of 32.786KHz),
but can also be 19.2 or 27MHz which result in much larger drift.

Since this is used to drive the master counter at 32.768KHz * 375 /
2 = 6.144MHz, the emulated speed for 20MHz is of by 570ppm, or about 43
seconds per day, and more than the 500ppm NTP is able to tolerate.

Checking the CTRL_CORE_BOOTSTRAP register can determine if the CPU
is using the real 32.768KHz crystal or the emulated SYSCLK1/610, and
by known that the real counter frequency can be determined and used.
The real speed is then SYSCLK1 / 610 * 375 / 2 or SYSCLK1 * 75 / 244.

Signed-off-by: Len Sorensen 
Tested-by: Lokesh Vutla 
Signed-off-by: Tony Lindgren

ARM: omap5/dra7xx: Fix frequency typos

2015-01-05T23:48:03+00:00

The switch statement of the possible list of SYSCLK1 frequencies is
missing a 0 in 4 out of the 7 frequencies.

Fixes: fa6d79d27614 ("ARM: OMAP: Add initialisation for the real-time counter")
Cc: stable@vger.kernel.org # v3.7+
Signed-off-by: Len Sorensen 
Reviewed-by: Lokesh Vutla 
Acked-by: Nishanth Menon 
Signed-off-by: Tony Lindgren

ARM: OMAP2+: make of_device_ids const

2014-09-11T19:37:23+00:00

of_device_ids (i.e. compatible strings and the respective data) are not
supposed to change at runtime. All functions working with of_device_ids
provided by  work with const of_device_ids. So mark the
non-const function parameters and structs for OMAP2+ as const, too.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Tony Lindgren

Merge tag 'cleanup-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into next

2014-06-02T23:14:07+00:00

Pull ARM SoC cleanups from Olof Johansson:
 "Cleanups for 3.16.  Among these are:

   - a bunch of misc cleanups for Broadcom platforms, mostly
     housekeeping
   - enabling Common Clock Framework on the older s3c24xx Samsung
     chipsets
   - cleanup of the Versatile Express system controller code, moving it
     to syscon
   - power management cleanups for OMAP platforms

  plus a handful of other cleanups across the place"

* tag 'cleanup-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (87 commits)
  ARM: kconfig: allow PCI support to be selected with ARCH_MULTIPLATFORM
  clk: samsung: fix build error
  ARM: vexpress: refine dependencies for new code
  clk: samsung: clk-s3c2410-dlck: do not use PNAME macro as it declares __initdata
  cpufreq: exynos: Fix the compile error
  ARM: S3C24XX: move debug-macro.S into the common space
  ARM: S3C24XX: use generic DEBUG_UART_PHY/_VIRT in debug macro
  ARM: S3C24XX: trim down debug uart handling
  ARM: compressed/head.S: remove s3c24xx special case
  ARM: EXYNOS: Remove unnecessary inclusion of cpu.h
  ARM: EXYNOS: Migrate Exynos specific macros from plat to mach
  ARM: EXYNOS: Remove exynos_subsys registration
  ARM: EXYNOS: Remove duplicate lines in Makefile
  ARM: EXYNOS: use v7_exit_coherency_flush macro for cache disabling
  ARM: OMAP4: PRCM: remove references to cm-regbits-44xx.h from PRCM core files
  ARM: OMAP3/4: PRM: add support of late_init call to prm_ll_ops
  ARM: OMAP3/OMAP4: PRM: add prm_features flags and add IO wakeup under it
  ARM: OMAP3/4: PRM: provide io chain reconfig function through irq setup
  ARM: OMAP2+: PRM: remove unnecessary cpu_is_XXX calls from prm_init / exit
  ARM: OMAP2+: PRCM: cleanup some header includes
  ...

ARM: OMAP2+: raw read and write endian fix

2014-05-08T14:09:53+00:00

All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.

Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.

Signed-off-by: Victor Kamensky 
Signed-off-by: Taras Kondratiuk 
Signed-off-by: Tony Lindgren

ARM: OMAP2+: free use_gptimer_clksrc variable after boot

2014-05-06T00:35:03+00:00

The variable use_gptimer_clksrc is only used by two __init functions,
So we can freely free it after boot.

Signed-off-by: Oussama Ghorbel 
Signed-off-by: Tony Lindgren

ARM: OMAP2+: AM43x: Use gptimer as clocksource

2014-02-28T23:33:27+00:00

The SyncTimer in AM43x is clocked using the following two sources:
1) An inaccuarte 32k clock (CLK_32KHZ) derived from PER DPLL, causing system
   time to go slowly (~10% deviation).
2) external 32KHz RTC clock, which may not always be available on board like
   in the case of ePOS EVM

Use gptimer as clocksource instead, as is done in the case of AM335x
(which does not have a SyncTimer). With this, system time keeping works
accurately.

Signed-off-by: Rajendra Nayak 
Signed-off-by: Lokesh Vutla 
Signed-off-by: Tony Lindgren