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124 Commits (335d2828a9000fab6f3895f261e3281342f51f5b)

Author SHA1 Message Date
Claudiu Beznea c406e53521 ARM: at91: pm: use of_device_id array to find the proper shdwc node
commit ec6e618c8c upstream.

Use of_device_id array to find the proper shdwc compatibile node.
SAM9X60's shdwc changes were not integrated when
commit eaedc0d379 ("ARM: at91: pm: add ULP1 support for SAM9X60")
was integrated.

Fixes: eaedc0d379 ("ARM: at91: pm: add ULP1 support for SAM9X60")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1576062248-18514-3-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-14 16:34:16 -05:00
Claudiu Beznea 69f08f44b4 ARM: at91: pm: use SAM9X60 PMC's compatible
commit 6b9dfd986a upstream.

SAM9X60 PMC's has a different PMC. It was not integrated at the moment
commit 01c7031cfa ("ARM: at91: pm: initial PM support for SAM9X60")
was published.

Fixes: 01c7031cfa ("ARM: at91: pm: initial PM support for SAM9X60")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1576062248-18514-2-git-send-email-claudiu.beznea@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-14 16:34:16 -05:00
Olof Johansson abd6aa55d7 AT91 SoC for 5.3
- fix a pm.c warning with W=1
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Merge tag 'at91-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/soc

AT91 SoC for 5.3

 - fix a pm.c warning with W=1

* tag 'at91-5.3-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  arm: add missing include platform-data/atmel.h

Signed-off-by: Olof Johansson <olof@lixom.net>
2019-06-25 05:50:31 -07:00
Philippe Mazenauer 95701b1c3c arm: add missing include platform-data/atmel.h
Include corresponding headerfile <linux/platform-data/atmel.h> for
function at91_suspend_entering_slow_clock().

../arch/arm/mach-at91/pm.c:279:5: warning: no previous prototype for ‘at91_suspend_entering_slow_clock’ [-Wmissing-prototypes]
 int at91_suspend_entering_slow_clock(void)
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Philippe Mazenauer <philippe.mazenauer@outlook.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2019-06-20 12:15:47 +02:00
Thomas Gleixner 2874c5fd28 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 3029 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:32 -07:00
Olof Johansson faff3fcf01 AT91 SoC for 5.2
- PM changes for SAM9X60
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Merge tag 'at91-5.2-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux into arm/late

AT91 SoC for 5.2

 - PM changes for SAM9X60

* tag 'at91-5.2-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  ARM: at91: pm: do not disable/enable PLLA for ULP modes
  ARM: at91: pm: disable RC oscillator in ULP0
  ARM: at91: pm: add ULP1 support for SAM9X60
  ARM: at91: pm: add support for per SoC wakeup source configuration
  ARM: at91: pm: keep at91_pm_backup_init() only for SAMA5D2 SoCs
  ARM: at91: pm: initial PM support for SAM9X60
  dt-bindings: arm: atmel: add binding for SAM9X60 SoC
  ARM: at91: pm: introduce at91_soc_pm structure

Signed-off-by: Olof Johansson <olof@lixom.net>
2019-05-16 11:05:11 -07:00
Peng Hao ba5e60c9b7 arm/mach-at91/pm : fix possible object reference leak
of_find_device_by_node() takes a reference to the struct device
when it finds a match via get_device. When returning error we should
call put_device.

Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-04-04 12:00:24 +02:00
Claudiu Beznea eaedc0d379 ARM: at91: pm: add ULP1 support for SAM9X60
Add ULP1 support for SAM9X60. In pm_suspend.S enable RC oscillator in
PMC if it is not enabled. At resume the state before suspend is
restored.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-03-28 11:05:53 +01:00
Claudiu Beznea a958156dac ARM: at91: pm: add support for per SoC wakeup source configuration
Add support for per SoC wakeup source configuration. In this way
we could have per SoC wakeup sources, shutdown controller and power
management controller configurations for ULP1 power management mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-03-28 11:05:53 +01:00
Claudiu Beznea 2fa86e5200 ARM: at91: pm: keep at91_pm_backup_init() only for SAMA5D2 SoCs
In at91_pm_backup_init() return if it is not about SAMA5D2 SoCs.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-03-28 11:05:53 +01:00
Claudiu Beznea 01c7031cfa ARM: at91: pm: initial PM support for SAM9X60
Add initial PM support for SAM9X60. This include idle, WFI and ULP0.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-03-28 11:05:53 +01:00
Claudiu Beznea c3f5b8fde7 ARM: at91: pm: introduce at91_soc_pm structure
To have per SoC PM information add a new structure which embed
a member of type struct at91_pm_data. This will allow easy addition
of new information without contaminate struct at91_pm_data that is
passed to the last phase suspend function (at91_suspend_sram_fn).

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
2019-03-28 11:05:52 +01:00
zhong jiang 95590a6286 ARM: at91: pm: call put_device instead of of_node_put in at91_pm_config_ws
of_find_device_by_node takes a reference to the struct device when it
finds a match via get_device. but it fails to put_device in
at91_pm_config_ws, for_each_matching_node_and_match will get and put
the node properly, there is no need to call the of_put_node. Therefore,
just call put_device instead of of_node_put in at91_pm_config_ws.

Fixes: d7484f5c6b ("ARM: at91: pm: configure wakeup sources for ULP1 mode")
Suggested-by: Claudiu Beznea <Claudiu.Beznea@microchip.com>
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-09-25 12:26:17 +02:00
Claudiu Beznea 1e1f808f9d ARM: at91: pm: remove pm_bu initialization in at91_pm_backup_init()
There is no need to initialize pm_bu since it is used only if backup
mode is selected. In case backup mode initialization fails (which means
pm_bu is invalid) the ULP0 mode will be selected.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-08-27 17:10:13 +02:00
Linus Torvalds 2f34a64aea ARM: Device-tree updates
Business as usual -- the bulk of our changes are to devicetree files
 with new hardware support, new SoCs and platforms, and new board types.
 
 New SoCs/platforms:
  - Raspberry Pi Compute Module (CM1) and IO board
  - i.MX6SSL from NXP
  - Renesas RZ/N1D SoC (R9A06G032), Dual Cortex-A7 with Ethernet, CAN and
    PLC interfaces
  - TI AM654 SoC, Quad Cortex-A53, safety subsystem with Cortex-R5
    controllers, communication and PRU subsystem and lots of other
    interfaces (PCIe, USB3, etc).
 
 New boards and systems:
  - Several Atmel at91-based boards from Laird
  - Marvell Armada388-based Helios4 board from SolidRun
  - Samsung Aires-based phones (s5pv210)
  - Allwinner A64-based Pinebook laptop
 
 In addition to the above, there's the usual amount of new devices
 described on existing platforms, fixes and tweaks and new minor variants
 of boards/platforms.
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Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM device-tree updates from Olof Johansson:
 "Business as usual -- the bulk of our changes are to devicetree files
  with new hardware support, new SoCs and platforms, and new board
  types.

  New SoCs/platforms:
   - Raspberry Pi Compute Module (CM1) and IO board
   - i.MX6SSL from NXP
   - Renesas RZ/N1D SoC (R9A06G032), Dual Cortex-A7 with Ethernet, CAN
     and PLC interfaces
   - TI AM654 SoC, Quad Cortex-A53, safety subsystem with Cortex-R5
     controllers, communication and PRU subsystem and lots of other
     interfaces (PCIe, USB3, etc).

  New boards and systems:
   - Several Atmel at91-based boards from Laird
   - Marvell Armada388-based Helios4 board from SolidRun
   - Samsung Aires-based phones (s5pv210)
   - Allwinner A64-based Pinebook laptop

  In addition to the above, there's the usual amount of new devices
  described on existing platforms, fixes and tweaks and new minor
  variants of boards/platforms"

* tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (478 commits)
  arm64: dts: sdm845: Add tsens nodes
  arm64: dts: msm8996: thermal: Initialise via DT and add second controller
  arm64: dts: sprd: Add one suspend timer
  arm64: dts: sprd: Add SC27XX ADC device
  arm64: dts: sprd: Add SC27XX eFuse device
  arm64: dts: sprd: Add SC27XX vibrator device
  arm64: dts: sprd: Add SC27XX breathing light controller device
  arm64: dts: meson-axg: add spdif-dit codec
  arm64: dts: meson-axg: add lineout codec
  arm64: dts: meson-axg: add linein codec
  arm64: dts: meson-axg: add tdm interfaces
  arm64: dts: meson-axg: add tdmout formatters
  arm64: dts: meson-axg: add tdmin formatters
  arm64: dts: meson-axg: add spdifout
  arm64: dts: rockchip: add led support for Firefly-RK3399
  arm64: dts: rockchip: remove deprecated Type-C PHY properties on rk3399
  arm64: dts: rockchip: add power button support for Firefly-RK3399
  ARM: dts: aspeed: Add coprocessor interrupt controller
  arm64: dts: meson-axg: add audio arb reset controller
  arm64: dts: meson-axg: add usb power regulator
  ...
2018-08-23 14:02:22 -07:00
Claudiu Beznea d7484f5c6b ARM: at91: pm: configure wakeup sources for ULP1 mode
Since for ULP1 PM mode of SAMA5D2 the wakeup sources are limited and
well known add a method to check if these wakeup sources are defined by
user (either via DT or filesystem). In case there are no wakeup sources
defined for ULP1 the PM suspend will fail, otherwise these will be
configured in fast startup registers of PMC. Since wakeup sources of
ULP1 need also to be configured in SHDWC registers the code was a bit
changed to map the SHDWC also in case ULP1 is requested by user (this
was done in the initialization phase). In case the ULP1 initialization
fails the ULP0 mode is used (this mode was also used in case backup mode
initialization failed).

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-17 15:08:12 +02:00
Wenyou Yang 5b56c182ed ARM: at91: pm: Add ULP1 mode support
In the ULP1 mode, in order to achieve the lowest power consumption
with the system in retention mode and be able to resume on the wake
up events, all the clocks are shut off, inclusive the embedded 12MHz
RC oscillator, and the number of wake up sources is limited as well.
When the wake up event is asserted, the embedded 12MHz RC oscillator
restarts automatically.

The ULP1 (Ultra Low-power mode 1) is introduced by SAMA5D2.

The previous size of pm_suspend.o was 2148 bytes. With the addition of
ULP1 mode the new size of pm_suspend.o raised at 2456 bytes.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
[claudiu.beznea@microchip.com: aligned with 4.18-rc1]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-17 15:08:02 +02:00
Claudiu Beznea 514e2a294a ARM: at91: pm: Use ULP0 naming instead of slow clock
Switch to use ULP0 naming instead of slow clock naming for power modes, to
be as closed as possible to datasheet. This commit does the necessary
renaming and macro addition to be as close as possible to the namings
from [1].

[1] https://lore.kernel.org/lkml/1470650705-31418-3-git-send-email-wenyou.yang@atmel.com

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-07-17 15:07:45 +02:00
Alexandre Belloni 91f87180e1 ARM: at91: fix USB clock detection handling
Add more compatibles to be able to correct the USB clock detection.

at91sam9261 and at91sam9263 have the same PMC_SCSR layout as at91sam9260.
at91sam9rl doesn't have any USB clock.

Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2018-06-20 11:50:28 +02:00
Alexandre Belloni 093d79f62a ARM: at91: Replace uses of virt_to_phys with __pa_symbol
The PM code wrongly uses virt_to_phys() instead of __pa_symbol() and was
not updated by commit 64fc2a947a ("ARM: 8641/1: treewide: Replace uses of
virt_to_phys with __pa_symbol") because it was not yet in tree.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2017-09-18 10:05:38 +02:00
Arnd Bergmann dbeb0c8e84 ARM: at91: don't select CONFIG_ARM_CPU_SUSPEND for old platforms
My previous patch fixed a link error for all at91 platforms when
CONFIG_ARM_CPU_SUSPEND was not set, however this caused another
problem on a configuration that enabled CONFIG_ARCH_AT91 but none
of the individual SoCs, and that also enabled CPU_ARM720 as
the only CPU:

warning: (ARCH_AT91 && SOC_IMX23 && SOC_IMX28 && ARCH_PXA && MACH_MVEBU_V7 && SOC_IMX6 && ARCH_OMAP3 && ARCH_OMAP4 && SOC_OMAP5 && SOC_AM33XX && SOC_DRA7XX && ARCH_EXYNOS3 && ARCH_EXYNOS4 && EXYNOS5420_MCPM && EXYNOS_CPU_SUSPEND && ARCH_VEXPRESS_TC2_PM && ARM_BIG_LITTLE_CPUIDLE && ARM_HIGHBANK_CPUIDLE && QCOM_PM) selects ARM_CPU_SUSPEND which has unmet direct dependencies (ARCH_SUSPEND_POSSIBLE)
arch/arm/kernel/sleep.o: In function `cpu_resume':
(.text+0xf0): undefined reference to `cpu_arm720_suspend_size'
arch/arm/kernel/suspend.o: In function `__cpu_suspend_save':
suspend.c:(.text+0x134): undefined reference to `cpu_arm720_do_suspend'

This improves the hack some more by only selecting ARM_CPU_SUSPEND
for the part that requires it, and changing pm.c to drop the
contents of unused init functions so we no longer refer to
cpu_resume on at91 platforms that don't need it.

Fixes: cc7a938f5f ("ARM: at91: select CONFIG_ARM_CPU_SUSPEND")
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-08-23 17:31:39 +02:00
Olof Johansson 5a55029f46 SoC for 4.13:
- New suspend/resume mode for sama5d2
  - Initial support for armv7m based SoCs
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Merge tag 'at91-ab-4.13-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux into next/soc

SoC for 4.13:

 - New suspend/resume mode for sama5d2
 - Initial support for armv7m based SoCs

* tag 'at91-ab-4.13-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux:
  ARM: at91: remove atmel_nand_data
  ARM: at91: fix at91_suspend_entering_slow_clock link error
  ARM: at91: debug: add samv7x support
  ARM: at91: add armv7m SoC detection
  ARM: at91: handle CONFIG_PM for armv7m configurations
  ARM: at91: Add armv7m support
  ARM: at91: Document armv7m compatibles
  ARM: at91: Documentation: add armv7m families
  ARM: at91: pm: fallback to slowclock when backup mode fails
  ARM: at91: pm: allow selecting standby and suspend modes
  ARM: at91: pm: Add sama5d2 backup mode

Signed-off-by: Olof Johansson <olof@lixom.net>
2017-06-18 22:53:20 -07:00
Arnd Bergmann 0527873b29 ARM: remove duplicate 'const' annotations'
gcc-7 warns about some declarations that are more 'const' than necessary:

arch/arm/mach-at91/pm.c:338:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier]
 static const struct of_device_id const ramc_ids[] __initconst = {
arch/arm/mach-bcm/bcm_kona_smc.c:36:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier]
 static const struct of_device_id const bcm_kona_smc_ids[] __initconst = {
arch/arm/mach-spear/time.c:207:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier]
 static const struct of_device_id const timer_of_match[] __initconst = {
arch/arm/mach-omap2/prm_common.c:714:34: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier]
 static const struct of_device_id const omap_prcm_dt_match_table[] __initconst = {
arch/arm/mach-omap2/vc.c:562:35: error: duplicate 'const' declaration specifier [-Werror=duplicate-decl-specifier]
 static const struct i2c_init_data const omap4_i2c_timing_data[] __initconst = {

The ones in arch/arm were apparently all introduced accidentally by one
commit that correctly marked a lot of variables as __initconst.

Fixes: 19c233b79d ("ARM: appropriate __init annotation for const data")
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-05-19 10:12:55 +02:00
Alexandre Belloni 287322386d ARM: at91: pm: fallback to slowclock when backup mode fails
If the backup sram allocation fails, ensure we can suspend by falling back
to the usual slow clock mode.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
2017-05-15 11:55:33 +02:00
Alexandre Belloni 7693e18e8c ARM: at91: pm: allow selecting standby and suspend modes
While we can only select between "standby" and "mem" states for power
management, the atmel platforms can actually support more modes.

For both standby and mem, allow selecting which mode will be used using the
atmel.pm_modes kernel parameter.
By default, keep the current modes.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
2017-05-15 11:55:24 +02:00
Alexandre Belloni 24a0f5c539 ARM: at91: pm: Add sama5d2 backup mode
The sama5d2 has a mode were it is possible to cut power to the SoC while
keeping the RAM in self refresh.
Resuming from that mode needs support in the firmware/bootloader.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
2017-05-15 11:55:17 +02:00
Alexandre Belloni e56d75a9cf ARM: at91: pm: Remove at91_pm_set_standby
Merge at91_pm_set_standby() in at91_dt_ramc as this is the only callsite.
That moves it to the init section.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:09 +02:00
Alexandre Belloni 1346919285 ARM: at91: pm: Merge all at91sam9*_pm_init
The PM initialization is now identical for all at91sam9. Merge the
functions.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:09 +02:00
Alexandre Belloni 13f16017d3 ARM: at91: pm: Tie the USB clock mask to the pmc
The USB clocks mask (uhp_udp_mask) depends on the pmc. Tie it to the pmc id
instead of the SoC.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:08 +02:00
Alexandre Belloni aab02d611f ARM: at91: pm: Tie the memory controller type to the ramc id
Instead of relying on the SoC type to select the memory controller type,
use the device tree ids as they are parsed anyway.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:08 +02:00
Alexandre Belloni 56387634b7 ARM: at91: pm: Workaround DDRSDRC self-refresh bug with LPDDR1 memories.
As already explained for pm_suspend.S, the DDRSDR controller fails to put
LPDDR1 memories in self-refresh. Force the controller to think it has DDR2
memories during the self-refresh period, as the DDR2 self-refresh spec is
equivalent to LPDDR1, and is correctly implemented in the controller.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:07 +02:00
Alexandre Belloni 5a2d4f053f ARM: at91: pm: Simplify at91rm9200_standby
Since 2008, AT91_MC_SDRAMC_LPR is set to 0 at kernel initialization. There
is no use saving, changing and restoring it.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:06 +02:00
Alexandre Belloni 65cc1a59d1 ARM: at91: pm: Use struct at91_pm_data in pm_suspend.S
The number of register we can safely pass to at91_pm_suspend_in_sram is
limited. Instead, pass the address to the at91_pm_data structure.

The offsets are automatically generated to avoid hardcoding them.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:05 +02:00
Alexandre Belloni 9e07c3ce2c ARM: at91: pm: Move global variables into at91_pm_data
Instead of having separate global variables to hold IP addresses, move them
to struct at91_pm_data.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:05 +02:00
Alexandre Belloni 4d767bc3c3 ARM: at91: pm: Move at91_ramc_read/write to pm.c
Those macros are only used in pm.c, move them there so we can remove the
test on __ASSEMBLY__.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:04 +02:00
Alexandre Belloni 9824c447aa ARM: at91: pm: Cleanup headers
Remove unnecessary header inclusions and reorder the remaining ones.

Acked-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-31 20:36:04 +02:00
Nicolas Ferre 60b89f1928 ARM: at91: pm: cpu_idle: switch DDR to power-down mode
On some DDR controllers, compatible with the sama5d3 one,
the sequence to enter/exit/re-enter the self-refresh mode adds
more constrains than what is currently written in the at91_idle
driver. An actual access to the DDR chip is needed between exit
and re-enter of this mode which is somehow difficult to implement.
This sequence can completely hang the SoC. It is particularly
experienced on parts which embed a L2 cache if the code run
between IDLE calls fits in it...

Moreover, as the intention is to enter and exit pretty rapidly
from IDLE, the power-down mode is a good candidate.

So now we use power-down instead of self-refresh. As we can
simplify the code for sama5d3 compatible DDR controllers,
we instantiate a new sama5d3_ddr_standby() function.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: <stable@vger.kernel.org> # v4.1+
Fixes: 017b5522d5 ("ARM: at91: Add new binding for sama5d3-ddramc")
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-03-14 11:09:50 +01:00
Alexandre Belloni 6cc7fbdf8d ARM: at91: pm: remove useless extern definition
at91_ramc_base is local to pm.c, remove its definition in pm.h

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2017-01-11 13:21:24 +01:00
Ben Dooks ab6778eee5 ARM: at91: fix warnings in pm.c
Fix a pair of missing statics on un-exported functions and
include <linux/platform_data/atmel.h> to provide the declaration
of at91_suspend_entering_slow_clock() to fix the following
sparse warnings:

arch/arm/mach-at91/pm.c:127:5: warning: symbol 'at91_suspend_entering_slow_clock' was not declared. Should it be static?
arch/arm/mach-at91/pm.c:358:6: warning: symbol 'at91rm9200_idle' was not declared. Should it be static?
arch/arm/mach-at91/pm.c:367:6: warning: symbol 'at91sam9_idle' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-06-21 17:32:31 +02:00
Alexandre Belloni fbc7edca5a ARM: at91: pm: move idle functions to pm.c
Avoid using code from clk/at91 for PM.
This also has the bonus effect of setting arm_pm_idle for sama5 platforms.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-02-17 17:53:02 +01:00
Alexandre Belloni 5737b73e19 ARM: at91: pm: find and remap the pmc
To avoid relying on at91_pmc_read(), find the pmc node and remap it
locally.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-02-17 17:53:01 +01:00
Alexandre Belloni 997ff83b55 ARM: at91: pm: simply call at91_pm_init
at91_pm_init() doesn't return a value, as is the case for its callers,
simply call it instead of returning its non-existent return value.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2016-02-17 17:53:01 +01:00
Ludovic Desroches 8423536fe4 ARM: at91: fix pinctrl driver selection
Move the selection of the pinctrl driver to SoC family level since we
have two pinctrl drivers. It is useless to select one which is not
compatible with the SoC.

[abelloni: fixed pm.c when only sama2d2 is selected]
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-12-04 18:54:53 +01:00
Vladimir Zapolskiy 7385817359 genalloc: add name arg to gen_pool_get() and devm_gen_pool_create()
This change modifies gen_pool_get() and devm_gen_pool_create() client
interfaces adding one more argument "name" of a gen_pool object.

Due to implementation gen_pool_get() is capable to retrieve only one
gen_pool associated with a device even if multiple gen_pools are created,
fortunately right at the moment it is sufficient for the clients, hence
provide NULL as a valid argument on both producer devm_gen_pool_create()
and consumer gen_pool_get() sides.

Because only one created gen_pool per device is addressable, explicitly
add a restriction to devm_gen_pool_create() to create only one gen_pool
per device, this implies two possible error codes returned by the
function, account it on client side (only misc/sram).  This completes
client side changes related to genalloc updates.

[akpm@linux-foundation.org: gen_pool_get() cleanup]
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-09-04 16:54:41 -07:00
Nicolas Pitre 19c233b79d ARM: appropriate __init annotation for const data
Init data marked const should be annotated with __initconst for
correctness and not __initdata.  In some cases the array gathering
references to that data has to be marked const as well. This fixes
LTO builds that otherwise fail with section mismatch errors.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
2015-07-28 13:55:27 +02:00
Vladimir Zapolskiy 0030edf296 genalloc: rename dev_get_gen_pool() to gen_pool_get()
To be consistent with other genalloc interface namings, rename
dev_get_gen_pool() to gen_pool_get().  The original omitted "dev_" prefix
is removed, since it points to argument type of the function, and so it
does not bring any useful information.

[akpm@linux-foundation.org: update arch/arm/mach-socfpga/pm.c]
Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Mark Brown <broonie@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Alan Tull <atull@opensource.altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-06-30 19:45:01 -07:00
Alexandre Belloni d7d45f2555 ARM: at91/pm: use the atmel-mc syscon defines
Use the defines from atmel-mc.h instead of at91rm9200_sdramc.h

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-05-20 16:37:44 +02:00
Arnd Bergmann 89522f0f8b Fourth batch of cleanup for 4.1:
- 1 issues revealed by the kbuild test robot fixed
 - move of some functions and macros into relevant files to be able to
   streamline the at91 specific header afterwards
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Merge tag 'at91-cleanup4_bis' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/multiplatform

Pull "Fourth batch of cleanup for 4.1" from Nicolas Ferre:

- 1 issues revealed by the kbuild test robot fixed
- move of some functions and macros into relevant files to be able to
  streamline the at91 specific header afterwards

* tag 'at91-cleanup4_bis' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91:
  ARM: at91/pm: move AT91_MEMCTRL_* to pm.h
  ARM: at91/pm: move the standby functions to pm.c
  ARM: at91: fix pm_suspend.S compilation when ARMv6 is selected
2015-04-14 01:50:21 +02:00
Alexandre Belloni a18d0699dd ARM: at91/pm: move the standby functions to pm.c
The standby functions are now only used in pm.c, move them there.

Also, they are not inlined as a pointer to those functions is passed to the
cpuidle driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-04-05 21:59:51 +02:00
Alexandre Belloni 23b8408246 ARM: at91: remove hardware.h
hardware.h is now mostyl unused, move the remaining declarations to pm.c and
remove it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-19 16:37:45 +01:00