522 Commits

Author SHA1 Message Date
Olof Johansson
ea36b02269 Merge branch 'clps711x/soc' into next/soc
From Alexander Shiyan, this is a series of cleanups of clps711x, movig it
closer to multiplatform and cleans up a bunch of old code.

* clps711x/soc:
  ARM: clps711x: Update defconfig
  ARM: clps711x: Add support for SYSCON driver
  ARM: clps711x: edb7211: Control LCD backlight via PWM
  ARM: clps711x: edb7211: Add support for I2C
  ARM: clps711x: Optimize interrupt handling
  ARM: clps711x: Add clocksource framework
  ARM: clps711x: Replace "arch_initcall" in common code with ".init_early"
  ARM: clps711x: Move specific definitions from hardware.h to boards files
  ARM: clps711x: p720t: Define PLD registers as GPIOs
  ARM: clps711x: autcpu12: Move remaining specific definitions to board file
  ARM: clps711x: autcpu12: Special driver for handling memory is removed
  ARM: clps711x: autcpu12: Add support for NOR flash
  ARM: clps711x: autcpu12: Move LCD DPOT definitions to board file
  ARM: clps711x: Set PLL clock to zero if we work from 13 mHz source
  ARM: clps711x: Remove NEED_MACH_MEMORY_H dependency
  ARM: clps711x: Re-add GPIO support
  GPIO: clps711x: Add DT support
  GPIO: clps711x: Rewrite driver for using generic GPIO code
  + Linux 3.10-rc4

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-11 15:57:51 -07:00
Arnd Bergmann
0b63cc3ce1 clk: spear: fix build error for spear3xx
This patch is required to be able to disable spear320 support
after the spear320_clk_init() prototype changed for the real
function but not for the dummy.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-11 14:31:37 -07:00
Sachin Kamat
5cd644d837 clk: exynos4: Add additional G2D clocks
Add G2D clocks for Exynos4x12 SoC and sclk_fimg2d required by G2D
IP.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2013-06-12 04:54:49 +09:00
Doug Anderson
071ff9a36c clk: samsung: Fix pll36xx_recalc_rate to handle kdiv properly
The KDIV value is often listed as unsigned but it needs to be treated
as a 16-bit signed value when using it in calculations.  Fix our rate
recalculation to do this correctly.

Before doing this, I tried setting EPLL on exynos5250 to:
  rate, m, p, s, k = 80000000, 107, 2, 4, 43691

This rate is exactly from the table in the exynos5250 user manual.

I read this back as 80750003 with:
  cat /sys/kernel/debug/clk/fin_pll/fout_epll/clk_rate

After this patch, it reads back as 80000003

Signed-off-by: Doug Anderson <dianders@chromium.org>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Reviewed-by: Vikas Sajjan <vikas.sajjan@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-11 09:51:26 -07:00
Shawn Guo
081c9025f4 clk: divider: do not propagate rate change request when unnecessary
If the current rate of parent clock is sufficient to provide child a
requested rate with a proper divider setting, the rate change request
should not be propagated.  Instead, changing the divider setting is good
enough to get child clock run at the requested rate.

On an imx6q clock configuration illustrated below,

  ahb --> ipg --> ipg_per
  132M    66M     66M

calling clk_set_rate(ipg_per, 22M) with the current
clk_divider_bestdiv() implementation will result in the rate change up
to ahb level like the following, because of the unnecessary/incorrect
rate change propagation.

  ahb --> ipg --> ipg_per
  66M     22M     22M

Fix the problem by trying to see if the requested rate can be achieved
by simply changing the divider value, and in that case return the
divider immediately from function clk_divider_bestdiv() as the best
one, so that all those unnecessary rate change propagation can be saved.

Reported-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-10 15:20:48 -07:00
Tushar Behera
589c603b2c clk: exynos5250: Add sclk_mpll to the parent list of mout_cpu clock
'mout_mpll' is added the list of parent clocks for 'mout_cpu'.
'mout_mpll' is an alias to the clock 'sclk_mpll'. Hence 'sclk_mpll'
should be added to the list of parent clocks.

This results in an error when cpufreq driver for EXYNOS5250 tries to
set 'mout_mpll' as a parent for 'mout_cpu'.

clk_set_parent: clk sclk_mpll can not be parent of clk mout_cpu

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-10 15:14:17 -07:00
Tushar Behera
39b72d89eb clk: exynos5250: Update cpufreq related clocks for EXYNOS5250
cpufreq driver for EXYNOS5250 is not a platform driver, hence we cannot
currently pass the clock names through a device tree node. Instead, we
need to make them available through a global alias.

cpufreq driver for EXYNOS5250 requires four clocks - 'armclk',
'mout_cpu', 'mout_mpll' and 'mout_apll'.

'armclk' has already been defined with an alias, 'mout_cpu', 'mout_mpll'
and 'mout_apll' are now defined with an alias.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-10 15:14:07 -07:00
Olof Johansson
e56c60c374 Merge tag 'zynq-clk-for-3.11' of git://git.xilinx.com/linux-xlnx into next/soc
From Michal Simek:
arm: Xilinx Zynq clock changes for v3.11

Change Xilinx Zynq DT clock description which reflects logical abstraction
of Zynq's clock tree.

- Refactor PLL driver
- Use new clock controller driver
- Change timer and uart drivers

* tag 'zynq-clk-for-3.11' of git://git.xilinx.com/linux-xlnx:
  clk: zynq: Remove deprecated clock code
  arm: zynq: Migrate platform to clock controller
  clk: zynq: Add clock controller driver
  clk: zynq: Factor out PLL driver

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-06-07 18:21:51 -07:00
Lai Jiangshan
72b5322f11 clk: remove notifier from list before freeing it
The @cn is stay in @clk_notifier_list after it is freed, it cause
memory corruption.

Example, if @clk is registered(first), unregistered(first),
registered(second), unregistered(second).

The freed @cn will be used when @clk is registered(second),
and the bug will be happened when @clk is unregistered(second):

[  517.040000] clk_notif_dbg clk_notif_dbg.1: clk_notifier_unregister()
[  517.040000] Unable to handle kernel paging request at virtual address 00df3008
[  517.050000] pgd = ed858000
[  517.050000] [00df3008] *pgd=00000000
[  517.060000] Internal error: Oops: 5 [#1] PREEMPT SMP ARM
[  517.060000] Modules linked in: clk_notif_dbg(O-) [last unloaded: clk_notif_dbg]
[  517.060000] CPU: 1 PID: 499 Comm: modprobe Tainted: G           O 3.10.0-rc3-00119-ga93cb29-dirty #85
[  517.060000] task: ee1e0180 ti: ee3e6000 task.ti: ee3e6000
[  517.060000] PC is at srcu_readers_seq_idx+0x48/0x84
[  517.060000] LR is at srcu_readers_seq_idx+0x60/0x84
[  517.060000] pc : [<c0052720>]    lr : [<c0052738>]    psr: 80070013
[  517.060000] sp : ee3e7d48  ip : 00000000  fp : ee3e7d6c
[  517.060000] r10: 00000000  r9 : ee3e6000  r8 : 00000000
[  517.060000] r7 : ed84fe4c  r6 : c068ec90  r5 : c068e430  r4 : 00000000
[  517.060000] r3 : 00df3000  r2 : 00000000  r1 : 00000002  r0 : 00000000
[  517.060000] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  517.060000] Control: 18c5387d  Table: 2d85804a  DAC: 00000015
[  517.060000] Process modprobe (pid: 499, stack limit = 0xee3e6238)
[  517.060000] Stack: (0xee3e7d48 to 0xee3e8000)
....
[  517.060000] [<c0052720>] (srcu_readers_seq_idx+0x48/0x84) from [<c0052790>] (try_check_zero+0x34/0xfc)
[  517.060000] [<c0052790>] (try_check_zero+0x34/0xfc) from [<c00528b0>] (srcu_advance_batches+0x58/0x114)
[  517.060000] [<c00528b0>] (srcu_advance_batches+0x58/0x114) from [<c0052c30>] (__synchronize_srcu+0x114/0x1ac)
[  517.060000] [<c0052c30>] (__synchronize_srcu+0x114/0x1ac) from [<c0052d14>] (synchronize_srcu+0x2c/0x34)
[  517.060000] [<c0052d14>] (synchronize_srcu+0x2c/0x34) from [<c0053a08>] (srcu_notifier_chain_unregister+0x68/0x74)
[  517.060000] [<c0053a08>] (srcu_notifier_chain_unregister+0x68/0x74) from [<c0375a78>] (clk_notifier_unregister+0x7c/0xc0)
[  517.060000] [<c0375a78>] (clk_notifier_unregister+0x7c/0xc0) from [<bf008034>] (clk_notif_dbg_remove+0x34/0x9c [clk_notif_dbg])
[  517.060000] [<bf008034>] (clk_notif_dbg_remove+0x34/0x9c [clk_notif_dbg]) from [<c02bb974>] (platform_drv_remove+0x24/0x28)
[  517.060000] [<c02bb974>] (platform_drv_remove+0x24/0x28) from [<c02b9bf8>] (__device_release_driver+0x8c/0xd4)
[  517.060000] [<c02b9bf8>] (__device_release_driver+0x8c/0xd4) from [<c02ba680>] (driver_detach+0x9c/0xc4)
[  517.060000] [<c02ba680>] (driver_detach+0x9c/0xc4) from [<c02b99c4>] (bus_remove_driver+0xcc/0xfc)
[  517.060000] [<c02b99c4>] (bus_remove_driver+0xcc/0xfc) from [<c02bace4>] (driver_unregister+0x54/0x78)
[  517.060000] [<c02bace4>] (driver_unregister+0x54/0x78) from [<c02bbb44>] (platform_driver_unregister+0x1c/0x20)
[  517.060000] [<c02bbb44>] (platform_driver_unregister+0x1c/0x20) from [<bf0081f8>] (clk_notif_dbg_driver_exit+0x14/0x1c [clk_notif_dbg])
[  517.060000] [<bf0081f8>] (clk_notif_dbg_driver_exit+0x14/0x1c [clk_notif_dbg]) from [<c00835e4>] (SyS_delete_module+0x200/0x28c)
[  517.060000] [<c00835e4>] (SyS_delete_module+0x200/0x28c) from [<c000edc0>] (ret_fast_syscall+0x0/0x48)
[  517.060000] Code: e5973004 e7911102 e0833001 e2881002 (e7933101)

Cc: stable@kernel.org
Reported-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Tested-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: shortened $SUBJECT]
2013-06-06 18:22:52 -07:00
Philippe Begnic
a6a3ec7b51 clk: ux500: Clocks definition for u8540
First clocks definition version of PRCMU and PRCC clocks for u8540 platform

Signed-off-by: Philippe Begnic <philippe.begnic@st.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-06 18:17:25 -07:00
Philippe Begnic
1237e598a9 clk: ux500: Pass clock base adresses in initcall for u8540 and u9540
Align on u8500 version, pass clock base address in clk_init functions
for u8540 and u9540.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Philippe Begnic <philippe.begnic@st.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-06 18:16:04 -07:00
Mikko Perttunen
88235988d7 clk: tegra114: Fix msenc clock register
The msenc clock's register was set to the usb3 clock's register.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-04 23:52:53 -07:00
Olof Johansson
85b9174fda mvebu clock restructuring for v3.11
- clk: mvebu
     - reorganize by SoC to remove built up #ifdefs
     - add clk flags per clock gate
 
 Note: this branch only depends on mvebu/pcie in order to prevent managing a
 tricky modify/remove file merge conflict.  By rebasing on mvebu/pcie, we are
 able to build the resolution into the patch series.  The change is small, and
 has been tested by the respective authors.
 
 depends:
  - mvebu/pcie
     - mvebu/of_pci
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Merge tag 'seb_clk-3.11' of git://git.infradead.org/users/jcooper/linux into next/soc

From Jason Cooper:
mvebu clock restructuring for v3.11

 - clk: mvebu
    - reorganize by SoC to remove built up #ifdefs
    - add clk flags per clock gate

* tag 'seb_clk-3.11' of git://git.infradead.org/users/jcooper/linux:
  clk: mvebu: disintegrate obsolete file
  ARM: mvebu: move DT boards to SoC-centric clock init
  ARM: kirkwood: move DT boards to SoC-centric clock init
  ARM: dove: move DT boards to SoC-centric clock init
  clk: mvebu: add Armada XP SoC-centric clock init
  clk: mvebu: add Armada 370 SoC-centric clock init
  clk: mvebu: add Kirkwood SoC-centric clock init
  clk: mvebu: add Dove SoC-centric clock init
  clk: mvebu: add common clock functions for core clk and clk gating
  clk: mvebu: introduce per-clock-gate flags
2013-05-31 23:23:25 -07:00
Olof Johansson
a640874bb6 mvebu pcie driver for v3.11 (round 2, bugfix)
- mvebu pcie
     - fix return value check in mvebu_pcie_probe()
 
 depends
  - mvebu/of_pci
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Merge tag 'pcie-3.11-2' of git://git.infradead.org/users/jcooper/linux into next/soc

PCI-e driver for mvebu.

* tag 'pcie-3.11-2' of git://git.infradead.org/users/jcooper/linux:
  pci: mvebu: fix return value check in mvebu_pcie_probe()
  arm: mvebu: PCIe support is now available on mvebu
  pci: PCIe driver for Marvell Armada 370/XP systems
  clk: mvebu: add more PCIe clocks for Armada XP
  clk: mvebu: create parent-child relation for PCIe clocks on Armada 370
  of/pci: Add of_pci_parse_bus_range() function
  of/pci: Add of_pci_get_devfn() function
  of/pci: Provide support for parsing PCI DT ranges property

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-05-31 23:13:24 -07:00
Prashant Gaikwad
061cec925f clk: tegra: Use common of_clk_init function
Use common of_clk_init() function for clocks initialization.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-31 12:57:25 -07:00
Alexandre Courbot
9139227d4c clk: tegra114: correctly output clk_32k
Tegra has a blink timer register that allows to modulate the
clk_32k clock before outputting it. Since clk_32k is presented to the
kernel as a fixed clock, make sure this register does not tamper with
the clock frequency and that clk_32k is outputted as-is, similarly to
what is done on t20 and t30.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-31 12:24:36 -07:00
Prashant Gaikwad
995968e40e clk: tegra: fix clk_out parents list
Number of parents for clk_out_2 and clk_out_3 was incorrectly set
to clk_out1_parents. Even though it did not break anything since the
size was same better to fix.

Signed-off-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-31 12:22:00 -07:00
Daniel Tang
7d1818fa66 clk: Add TI-Nspire clock drivers
This patch adds a basic clock driver for the TI-Nspire calculator
series.

Changes from v1:
* Removed filename in header comment
* Removed unnecessary #undef EXTRACT statement

Signed-off-by: Daniel Tang <dt.tangr@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: fixed $SUBJECT and changelog max width]
2013-05-31 12:07:45 -07:00
Fabio Estevam
d68c380590 clk: mxs: Include clk mxs header file
Fix the following sparse warnings:

drivers/clk/mxs/clk-imx28.c:72:5: warning: symbol 'mxs_saif_clkmux_select' was not declared. Should it be static?
drivers/clk/mxs/clk-imx28.c:156:12: warning: symbol 'mx28_clocks_init' was not declared. Should it be static?

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: fixed $SUBJECT line]
2013-05-30 18:27:24 -07:00
Jingoo Han
c0431037b4 clk: use platform_{get,set}_drvdata()
Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-30 18:19:34 -07:00
Tang Yuantian
4bcccf193d clk: mpc85xx: Update the compatible string
The compatible string of clock is changed from *-2 to *-2.0
on chassis 2. So updated it accordingly.

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: improved $SUBJECT line]
2013-05-30 11:55:35 -07:00
Tony Prisk
419e321df8 clk: vt8500: Fix unbalanced spinlock in vt8500_dclk_set_rate()
With the addition of a DVO clock, a bug is now evident in the vt8500
clock code:
[    0.290000] WARNING: at init/main.c:698 do_one_initcall+0x158/0x18c()
[    0.300000] initcall wm8505fb_driver_init+0x0/0xc returned with disabled int

This is caused by an unbalanced spinlock in vt8500_dclk_set_rate().
Replace the second call to spin_lock_irqsave() with spin_unlock_irqrestore().

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 16:13:58 -07:00
Giacomo A. Catenazzi
61fd58dc57 clk: sunxi: "cpu_data" is defined in header files of some architectures
In some architectures, the #define cpu_data is not a "macro-function",
so the compiler will substitute the identifier with probably something
wrong.

Signed-off-by: Giacomo A. Catenazzi <cate@cateee.net>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
[emilio@elopez.com.ar: use cpu_mux_data instead of this_cpu_data]
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 15:48:23 -07:00
Tushar Behera
0e56523fd7 clk: exynos5250: Add sclk_mpll to the parent list of mout_cpu clock
'mout_mpll' is added the list of parent clocks for 'mout_cpu'.
'mout_mpll' is an alias to the clock 'sclk_mpll'. Hence 'sclk_mpll'
should be added to the list of parent clocks.

This results in an error when cpufreq driver for EXYNOS5250 tries to
set 'mout_mpll' as a parent for 'mout_cpu'.

clk_set_parent: clk sclk_mpll can not be parent of clk mout_cpu

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 15:39:28 -07:00
Tushar Behera
37351fd562 clk: exynos5250: Update cpufreq related clocks for EXYNOS5250
cpufreq driver for EXYNOS5250 is not a platform driver, hence we cannot
currently pass the clock names through a device tree node. Instead, we
need to make them available through a global alias.

cpufreq driver for EXYNOS5250 requires four clocks - 'armclk',
'mout_cpu', 'mout_mpll' and 'mout_apll'.

'armclk' has already been defined with an alias, 'mout_cpu', 'mout_mpll'
and 'mout_apll' are now defined with an alias.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 15:39:17 -07:00
Marek Belisko
6532cb71fb clk: si5351: Set initial clkout rate when defined in platform data.
clock-frequency property from platform data was read but never used.
Apply defined rate when clock is registered.

Signed-off-by: Marek Belisko <marek.belisko@streamunlimited.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: add missing changelog]
Cc: stable@kernel.org

Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 15:09:24 -07:00
Marek Belisko
67e1e2268e clk: si5351: Fix clkout rate computation.
Rate was incorrectly computed because we read from wrong divider register.

Signed-off-by: Marek Belisko <marek.belisko@streamunlimited.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Cc: stable@kernel.org
2013-05-29 15:09:15 -07:00
Tony Prisk
65f2c58f0f clk: vt8500: Remove unnecessary divisor adjustment in vtwm_dclk_set_rate()
The divisor adjustment code to ensure that a divisor is not rounded down,
thereby giving a rate higher than requested, is unnecessary and in some
instances results in the actual rate being much lower than requested due to
rounding errors.

The test is already performed in vtwm_dclk_round_rate(), which is always
called when clk_set_rate is called. Due to rounding errors in the line:
divisor = parent_rate / rate (clk-vt8500.c:160) we will sometimes end up
adjusting the divisor twice - first in round_rate and then again in set_rate.

This patch removes the test/adjustment in vtwm_dclk_set_rate.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 14:47:17 -07:00
Tony Prisk
518d4709f1 clk: vt8500: Add support for clocks on the WM8850 SoCs
The WM8850 has a different PLL clock to the previous versions. This
patch adds support for the WM8850-style PLL clocks.

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 14:47:05 -07:00
Sebastian Hesselbarth
ea7e0bd7e7 clk: mvebu: disintegrate obsolete file
Switch from function-centric to soc-centric clock drivers now makes
a bunch of files obsolete. This deletes all files and Kconfig options
that are not required anymore.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:28:29 +00:00
Sebastian Hesselbarth
68be12bda2 clk: mvebu: add Armada XP SoC-centric clock init
This is moving core clock and clock gating init for Armada XP to
its own file and adds a Kconfig option. Also init functions are added
and declared so they get called on of_clk_init.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:59 +00:00
Sebastian Hesselbarth
6b72333d5b clk: mvebu: add Armada 370 SoC-centric clock init
This is moving core clock and clock gating init for Armada 370 to
its own file and adds a Kconfig option. Also init functions are added
and declared so they get called on of_clk_init.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:51 +00:00
Sebastian Hesselbarth
e89406c957 clk: mvebu: add Kirkwood SoC-centric clock init
This is moving core clock and clock gating init for Kirkwood to its
own file and adds a Kconfig option. Also init functions are added and
declared so they get called on of_clk_init.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:38 +00:00
Sebastian Hesselbarth
5d8401668e clk: mvebu: add Dove SoC-centric clock init
This is moving core clock and clock gating init for Dove to its own
file and adds a Kconfig option. Also init functions are added and
declared so they get called on of_clk_init.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:30 +00:00
Sebastian Hesselbarth
a45184099a clk: mvebu: add common clock functions for core clk and clk gating
Based on the current common functions for core clocks and clock
gating control, new common functions are joined in a single file.
Given the opportunity, names of functions and structs are unified,
and also a Kconfig entry is added.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:22 +00:00
Sebastian Hesselbarth
29020c9a40 clk: mvebu: introduce per-clock-gate flags
Clock gates found on MVEBU SoCs get registered by a common function.
To allow specific SoCs to provide tweaks introduce flags to the clock
gate descriptor instead of filling up the common function SoC specific
tweaks.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2013-05-29 19:20:04 +00:00
Sylwester Nawrocki
056f3d58db clk: samsung: Add CLK_IGNORE_UNUSED flag for the sysreg clocks
Currently no driver *) handles the sysreg clock, with an assumption
that this clock is always left in its default state (enabled).

Before commit 6e6aac7590f902d14d90bace3fd499
ARM: EXYNOS: Migrate clock support to common clock framework

the sysreg clock was not even defined and hence wasn't handled
explicitly in the kernel.

To restore the previous behaviour disable masking the sysreg clock
off in the clock core by default.

*) Except the Exynos4x12 FIMC-IS driver, which will be modified
   to not touch the sysreg clock.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 11:52:19 -07:00
Fabio Baltieri
f586938ba2 clk: ux500: clk-sysctrl: handle clocks with no parents
Fix clk_reg_sysctrl() to set main clock registers of new struct
clk_sysctrl even if the registered clock has no parents.

This fixes an issue where "ulpclk" was registered with all clk->reg_*
fields uninitialized, causing a -EINVAL error from clk_prepare().

Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 11:52:18 -07:00
Lee Jones
dd47044803 clk: ux500: Provide device enumeration number suffix for SMSC911x
First Ethernet device has a ".0" appended onto the device name. It
appears that we need this in order to obtain the correct clock.

Without this fix Ethernet does not function on Ux500 devices, which is a
regression.

Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: improved changelog]
2013-05-29 11:52:18 -07:00
Saravana Kannan
d41d580587 clk: Disable unused clocks after deferred probing is done
With deferred probing, late_initcall() is too soon to declare a clock as
unused. Wait for deferred probing to finish before declaring a clock as
unused. Since deferred probing is done in late_initcall(), do the unused
check to late_initcall_sync.

Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-29 00:52:20 -07:00
Axel Lin
bcc7fd20e2 clk: wm831x: Fix wm831x_clkout_get_parent
Current code looks strange because calling wm831x_clkout_set_parent() with 0 as
parent parameter, wm831x_clkout_get_parent() will return 1.

According to the datasheet:
R16528 (4090h) Clock Control1
        BIT 0: CLKOUT output source select
                0 = FLL output
                1 = 32.768kHz oscillator

Thus fix the entry order in wm831x_clkout_parents[] to make it has
the same meaning as the datasheet and make the return value
of wm831x_clkout_get_parent() consistent with the parent pass to
wm831x_clkout_set_parent().

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 23:50:52 -07:00
Axel Lin
6f8b314583 clk: wm831x: Fix update wrong register for enable/disable FLL
According to the datasheet, FLL Enable is controlled by
R16530 (4092h) FLL Control1
        BIT 0: FLL Enable
                0 = Disable
                1 = Enable

Thus the code should update WM831X_FLL_CONTROL_1 register rather than
WM831X_FLL_CONTROL_2 register.

Also fixes a trivial typo in dev_crit message.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 23:50:31 -07:00
Sebastian Hesselbarth
4564dbdadc clk: si5351: Allow to build without CONFIG_OF
With of_clk_provider stubs for CONFIG_OF not set, we can now also enable
clk-si5351 on those architectures.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:53:22 -07:00
Saravana Kannan
f8aa0bd5c9 clk: Fix race condition between clk_set_parent and clk_enable()
Without this patch, the following race condition is possible.
* clk-A has two parents - clk-X and clk-Y.
* All three are disabled and clk-X is current parent.
* Thread A: clk_set_parent(clk-A, clk-Y).
* Thread A: <snip execution flow>
* Thread A: Grabs enable lock.
* Thread A: Sees enable count of clk-A is 0, so doesn't enable clk-Y.
* Thread A: Updates clk-A SW parent to clk-Y
* Thread A: Releases enable lock.
* Thread B: clk_enable(clk-A).
* Thread B: clk_enable() enables clk-Y, then enabled clk-A and returns.

clk-A is now enabled in software, but not clocking in hardware since the
hardware parent is still clk-X.

The only way to avoid race conditions between clk_set_parent() and
clk_enable/disable() is to ensure that clk_enable/disable() calls don't
require changes to hardware enable state between changes to software clock
topology and hardware clock topology.

The options to achieve the above are:
1. Grab the enable lock before changing software/hardware topology and
   release it afterwards.
2. Keep the clock enabled for the duration of software/hardware topology
   change so that any additional enable/disable calls don't try to change
   the hardware state. Once the topology change is complete, the clock can
   be put back in its original enable state.

Option (1) is not an acceptable solution since the set_parent() ops might
need to sleep.

Therefore, this patch implements option (2).

This patch doesn't violate any API semantics. clk_disable() doesn't
guarantee that the clock is actually disabled. So, no clients of a clock
can assume that a clock is disabled after their last call to clk_disable().
So, enabling the clock during a parent change is not a violation of any API
semantics.

This also has the nice side effect of simplifying the error handling code.

Signed-off-by: Saravana Kannan <skannan@codeaurora.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: fixed up whitespace issue]
2013-05-28 22:50:32 -07:00
Jean-Francois Moine
9807362bfe clk: si5351: declare all device IDs for module loading
When the si5351 driver is a kernel module, it is loaded into memory
from its i2c device IDs, but not from its DT compatible properties.

This patch declares the i2c device IDs of all chip variants.

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:50:32 -07:00
Maxime Ripard
4f985b4c80 clk: sun5i: Add compatibles for Allwinner A13
The A13 has a lot less clocks than the one found in the Allwinner A10.
Add these stripped down clocks to the clock driver and in the
documentation.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:50:31 -07:00
Fabio Baltieri
20faa59e0f clk: ux500: abx500-clk: rename ux500 audio codec aliases
Change soc-audio related clk_register_clkdev() device names to reflect
the ones actually used in current snd-soc-mop500 and ab8500-codec
drivers.

Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:50:31 -07:00
Sebastian Hesselbarth
1a0483d2a4 clk: si5351: Allow user to define disabled state for every clock output
This patch adds platform data and DT bindings to allow to overwrite
the stored disabled state for each clock output.

Signed-off-by: Marek Belisko <marek.belisko@streamunlimited.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:50:31 -07:00
Tang Yuantian
555eae9735 clk: add PowerPC corenet clock driver support
This adds the clock driver for Freescale PowerPC corenet
series SoCs using common clock infrastructure.

Signed-off-by: Tang Yuantian <Yuantian.Tang@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-05-28 22:50:31 -07:00
Olof Johansson
ff753f43da Device tree patches for the Nomadik machine:
- Move clock registration to the device tree
 - Support probing the MTU timer from the device tree
 - Register user LED and user key in the device tree
 - Update defconfig to account for user LED and user key
 - Move pin control mappings to the device tree
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Merge tag 'nomadik-dt-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik into next/dt

From Linus Walleij:
Device tree patches for the Nomadik machine:
- Move clock registration to the device tree
- Support probing the MTU timer from the device tree
- Register user LED and user key in the device tree
- Update defconfig to account for user LED and user key
- Move pin control mappings to the device tree

* tag 'nomadik-dt-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik:
  ARM: nomadik: move the pin configuration to DT
  ARM: nomadik: add led and key for S8815
  ARM: nomadik: register clocksource from device tree
  ARM: nomadik: convert all clocks except timer to dt
  clocksource: nomadik-mtu: support of probe

Signed-off-by: Olof Johansson <olof@lixom.net>
2013-05-27 21:20:17 -07:00