ARM64: Hisilicon ARM64 SoC Updates for V4.2

- Added Hisilicon ARM64 SoC family support in Kconfig and defconfig

* tag 'hi6220-soc-for-4.2' of git://github.com/hisilicon/linux-hisi:
  arm64: Enable Hisilicon ARMv8 SoC family in Kconfig and defconfig

Update my mailbox to use kernel.org one for handling kernel community
maintenance traffic.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

Merge tag 'imx-soc-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/soc

The i.MX SoC updates for 4.2:
 - Add new SoC i.MX7D support, which integrates two Cortex-A7 and one
   Cortex-M4 cores.
 - Support suspend from IRAM on i.MX53, so that DDR pins can be set to
   high impedance for more power saving during suspend.
 - Move i.MX clock drivers from arch/arm/mach-imx to drivers/clk/imx.
 - Move i.MX GPT timer driver from arch/arm/mach-imx into
   drivers/clocksource.
 - A couple of clock driver update for VF610 and i.MX6Q.
 - A few random code correction and improvement.

* tag 'imx-soc-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: (44 commits)
  ARM: imx: imx7d requires anatop
  clocksource: timer-imx-gpt: remove include of <asm/mach/time.h>
  ARM: imx: move timer driver into drivers/clocksource
  ARM: imx: remove platform headers from timer driver
  ARM: imx: provide gpt device specific irq functions
  ARM: imx: get rid of variable timer_base
  ARM: imx: define gpt register offset per device type
  ARM: imx: move clock event variables into imx_timer
  ARM: imx: set up .set_next_event hook via imx_gpt_data
  ARM: imx: setup tctl register in device specific function
  ARM: imx: initialize gpt device type for DT boot
  ARM: imx: define an enum for gpt timer device type
  ARM: imx: move timer resources into a structure
  ARM: imx: use relaxed IO accessor in timer driver
  ARM: imx: make imx51/3 suspend optional
  ARM: clk-imx6q: refine sata's parent
  ARM: imx: clk-v610: Add clock for I2C2 and I2C3
  ARM: mach-imx: iomux-imx31: Use DECLARE_BITMAP
  ARM: imx: add imx7d clk tree support
  ARM: clk: imx: update pllv3 to support imx7
  ...

 Conflicts:
	arch/arm/mach-imx/Kconfig

* socfpga/soc:
  ARM: socfpga: support suspend to ram
  ARM: socfpga: add CPU_METHOD_OF_DECLARE for Arria 10
  ARM: socfpga: use CPU_METHOD_OF_DECLARE for socfpga_cyclone5

Add code that requests that the sdr controller go into
self-refresh mode.  This code is run from ocram.

Suspend-to-RAM and EDAC support are mutually exclusive on
SOCFPGA.  If the EDAC is enabled, it will prevent the
platform from going into suspend.

Example of how to request to suspend to ram:
 $ echo enabled > \
/sys/devices/soc/ffc02000.serial0/tty/ttyS0/power/wakeup

 $ echo -n mem > /sys/power/state
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

Add boot_secondary implementation for the Arria10 platform. Bringing up
the secondary core on the Arria 10 platform is pretty similar to the
Cyclone/Arria 5 platform, with the exception of the following differences:

- Register offset to bringup CPU1 out of reset is different.
- The cpu1-start-addr for Arria10 contains an additional nibble.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

Convert cyclone5/arria5 to use CPU_METHOD_OF_DECLARE for smp operations.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>

This patch introduces ARCH_HISI to enable Hisilicon SoC family in
Kconfig and defconfig.
Signed-off-by: Bintian Wang <bintian.wang@huawei.com>
Acked-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Reviewed-by: Wei Xu <xuwei5@hisilicon.com>
Tested-by: Will Deacon <will.deacon@arm.com>
Tested-by: Tyler Baker <tyler.baker@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

Like i.MX6, the i.MX7 code calls into the anatop driver, which fails
if that is disabled:

arch/arm/mach-imx/built-in.o: In function `imx7d_init_machine':
arch/arm/mach-imx/mach-imx7d.c:24: undefined reference to `imx_anatop_init'
arch/arm/mach-imx/built-in.o: In function `imx7d_init_irq':
arch/arm/mach-imx/mach-imx7d.c:29: undefined reference to `imx_init_revision_from_anatop'

This patch ensures that for an imx7-only build, we still get anatop
built-in, matching what we do for imx6. We also need to select
HAVE_IMX_MMDC, as that is needed by the anatop code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

The include of <asm/mach/time.h> is not needed at all, and causes build
error in some cases.  Remove it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

After the cleanup on imx timer driver, now it's ready to be moved into
drivers/clocksource/.  Let's do it.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

With the cleanup done before, the platform specific headers now can be
removed.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

It splits irq enable/disable/acknowledge operations into device specific
functions as the hooks in imx_gpt_data, so that we can save the use of
timer_is_xxx() and cpu_is_xxx() checking in these irq functions.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

We now have pointer to imx_timer structure available where timer base
address is needed, so we can just kill global timer_base by using
imxtm->base instead.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

It defines offset of gpt registers TSTAT, TCN and TCMP per device
type in imx_gpt_data, so that these registers can be accessed in an
way without timer_is_v2() checking.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Since we now have imx_timer structure, it makes more sense to move those
clock event related variables into the structure, so that we can save
some global variables.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Set up .set_next_event hook via imx_gpt_data, so that we can save the
use of timer_is_v2().
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

It creates a gpt device speicific data structure and adds function hook
gpt_setup_tctl in there to set up gpt TCTL register.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Use different initialization function in CLOCKSOURCE_OF_DECLARE() to
initialize gpt device type for DT boot.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Define an enum for gpt timer device type in include/soc/imx/timer.h to
tell the gpt block differences among SoCs.  Update non-DT users (clock
drivers) to pass the device type.

As we now have include/soc/imx/timer.h, the declaration of
mxc_timer_init() is moved into there as the best fit.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Instead of passing around as individual argument, let's move timer
resources like irq and clocks together with base address into a data
structure, and pass pointer of the structure as argument to simplify
the function call interface.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Replace the __raw_readl/__raw_writel with readl_relaxed/writel_relaxed
which is endian-safe, as a step of moving the driver code into folder
drivers/clocksource.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

A recent change to the imx53 power management caused a build
regression when CONFIG_SOC_IMX53 is disabled:

mach-imx/built-in.o:(.init.rodata+0x60): undefined reference to `imx53_suspend'
mach-imx/built-in.o:(.init.rodata+0x64): undefined reference to `imx53_suspend_sz'

This avoids the problem by compiling the code in question
conditionally on the presence of CONFIG_SOC_IMX53. For
consistency, I'm also changing the same thing for
CONFIG_SOC_IMX51.

An additional benefit of this approach is reduced code size
for kernels that only include support for one of the two
SoCs.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 1579c7b9 ("ARM: imx53: Set DDR pins to high impedance when in suspend to RAM.")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

According to IMX6D/Q RM, table 18-3, sata clock's parent is ahb, not ipg.
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Add support for clock gating of I2C2 and I2C3.
We use I2C2 in a (not yet mainlined) device tree.
Signed-off-by: Mirza Krak <mirza.krak@hostmobility.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Use the generic mechanism to declare a bitmap instead of unsigned long.
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Add i.MX7D clk tree support.

Enable all clock to bring up imx7.
Clock framework need be modified a little since imx7d
change clock design. otherwise system will halt and block the
other part upstream.

All clock refine need wait for Dong Aisheng's patch
clk: support clocks which requires parent clock on during operation
Or other solution ready.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Add type IMX_PLLV3_ENET_IMX7
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Enabled DAP (debug access port) by default. This enables the hw-
breakpoint framework to make use of the breakpoints and watchpoints
supported by hardware.

[    0.215805] hw-breakpoint: found 2 (+1 reserved) breakpoint and 1 watchpoint registers.
[    0.224624] hw-breakpoint: maximum watchpoint size is 4 bytes.

Without this clock, the hw-breakpoint driver claims an undefined
instruction during initialization:
[    0.227380] hw-breakpoint: Debug register access (0xee003e17) caused undefined instruction on CPU 0
[    0.227519] hw-breakpoint: CPU 0 failed to disable vector catch
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

In order to save power the DDR pins should be put into high
impedance when in suspend to RAM.

This requires manually requesting self refresh (rather than using the
automatic mode implemented by the CCM / ESDCTL), followed by
reconfiguring the IOMUXC.

Of course the code to do this cannot itself run from DDR so the
code is copied to and executed from internal memory.

In my tests using a custom i.MX53 board with LPDDR2 RAM
this reduced the suspend power consumption from 200mW to 60mW.
Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Add i.MX7D MSL support.
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Add low level uart debug support for imx7d
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Bai Ping <b51503@freescale.com>
Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Include the "common.h" header file to fix the following sparse warning:

arch/arm/mach-imx/mmdc.c:66:5: warning: symbol 'imx_mmdc_get_ddr_type' was not declared. Should it be static?
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Include the "clk.h" header file to fix the following sparse warning:

drivers/clk/imx/clk-cpu.c:77:12: warning: symbol 'imx_clk_cpu' was not declared. Should it be static?
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

The comments were corrected as the following to reflect
the real situation of Freescale MXC timer IP block.
There are totally 4 version of the timer on Freescale i.MX SoCs.
Signed-off-by: Shenwei Wang <shenwei.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Removed the duplicated function declaration of mxc_timer_init
which was already declared in drivers/clk/imx/clk.h.
Signed-off-by: Shenwei Wang <shenwei.wang@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

The irq_domain_ops are not modified by the driver and the irqdomain core
code accepts pointer to a const data.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

The definition of do_div uses unsigned long long
variable as its first parameter, better to pass
a u64 variable as first parameter when calling
do_div function.
Signed-off-by: Anson Huang <b20788@freescale.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Commit 4631960d26da ("ARM: imx6: set initial power mode in pm function")
moves imx6_set_lpm() from clock init function into
imx6_pm_common_init().  This causes a hang when cpuidle support is
enabled.  The reason for that is ARM core clock is shut down
unexpectedly by WAIT mode.  It happens with the following call stack:

    cpuidle_register_governor()
        cpuidle_switch_governor()
            cpuidle_uninstall_idle_handler()
                synchronize_sched()
                    wait_rcu_gp()
                        wait_for_completion()

When wait_for_completion() is called as above, all cores are idle/WFI.
Hence, the reset value of CCM_CLPCR_LPM - WAIT mode, will trigger a
hardware shutdown of the ARM core clock.

To fix the regression, we need to ensure that CCM_CLPCR_LPM is
initialized into RUN mode earlier than cpuidle governor registration,
which is a postcore_initcall.  This patch creates function
imx6_pm_ccm_init() to map CCM block and initialize CCM_CLPCR_LPM into
RUN mode, and have the function called from machine .init_irq hook,
which should be early enough.
Reported-by: Kevin Hilman <khilman@kernel.org>
Fixes: 8fb76a07 ("ARM: imx6: set initial power mode in pm function")
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Tyler Baker <tyler.baker@linaro.org>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

EPIT provides another timer implementation besides the default GPT
timer.  The imx35 clock driver will use EPIT timer when option
CONFIG_MXC_USE_EPIT is enabled.  However, initializing timers from
clock driver is a workaround solution and causes problem when we move
clock drivers into driver/clk.

Let's simply drop the EPIT initialization from there.  If people really
want this EPIT option, EPIT timer driver needs to be reworked to do the
initialization in a standard way - use CLOCKSOURCE_OF_DECLARE() with
device tree support.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>