Commit Graph

1262 Commits

Author SHA1 Message Date
Clément Léger
f2f5cf78a3 ARM: at91: pm: add support for sama5d2 secure suspend
When running with OP-TEE, the suspend control is handled securely.
Suspend can be entered using PSCI support. Since the sama5d2 supports
multiple suspend modes, add a new CONFIG_ATMEL_SECURE_PM which will
send a SMC call to select the suspend mode at init time.

"atmel.pm_modes" boot argument is still supported for compatibility
purposes but the standby value is actually ignored since PSCI suspend
is used and it only support one mode (suspend).

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 14:50:50 +03:00
Clément Léger
0c9fd82117 ARM: at91: add code to handle secure calls
Since OP-TEE now has a more complete support for sama5d2, add necessary
code to perform SMC calls. The detection of OP-TEE is based on a
specific device-tree node path (/firmware/optee) such has done by some
other SoC. A check is added to avoid doing SMC calls without having
OP-TEE.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 14:50:20 +03:00
Claudiu Beznea
f611af4c3b ARM: at91: Kconfig: implement PIT64B selection
Implement PIT64B selection thus it will be available for the necessary
targets (at the moment SAM9X60 and SAMA7G5) w/o the necessity to
specify it via defconfig. With this the current CONFIG_TIMER_OF
dependency of PIT64B driver could be removed.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 11:06:29 +03:00
Claudiu Beznea
b7fc72c633 ARM: at91: pm: add quirks for pm
SoCs supporting ULP0 or ULP1 modes and variants of Cadence Ethernet IP
(controlled by macb driver) may behave buggy when Wake-on-Lan (WoL) is
configured and WoL packet is received while in ULP0/ULP1. On some SoCs
Ethernet interface is not working after resume. On other SoCs the CPU
goes to abort on resume path when switching execution from internal SRAM
to DRAM. For ULP1 + WoL the issue is related a particular restart
sequence of the internal clocks when resuming. These clocks are
automatically managed by PMC and may happen that GMAC peripheral clock
is restarted few clock cycles before internal clocks causing blocking
of Ethernet's DMA. As a consequence Ethernet TX transactions are stopped
and RX transactions are partially stopped (packets are received by MAC,
RX counters incremented but the data is not transferred to DRAM). The
workaround for this is to disable Ethernet's peripheral clock when
going to ULP1. Same behavior has been reproduced on ULP0 for some
platforms (SAMA5D2, SAMA5D3) and the same workaround solves the issue.

The problem has been solved on pm.c as quirk to avoid polluting the
MACB driver with AT91 specific issues as this driver is generic to
multiple vendors.

At probe pointers to struct device_node are retrieved and on the
at91_pm_enter() the quirk specifics are applied: for all Ethernet
interfaces that were parsed the peripheral clocks are disabled. A
special handling is done for modes in dns_modes mask as these are
considered modes that blocks the system if WoL packet are received
but for which applying quirk will lead to not waking up on WoL
packets: in situation where Ethernet interface(s) has suspend mode
in dns_modes mask and Ethernet interface(s) is the only available
wakeup source the suspend is canceled.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 11:06:21 +03:00
Claudiu Beznea
9750d3b4d2 ARM: at91: pm: use kernel documentation style
Use kernel documentation style. Along with it fix the naming of
struct at91_pm_sfrbu_regs in documentation.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 11:06:20 +03:00
Claudiu Beznea
b568c71de7 ARM: at91: pm: introduce macros for pm mode replacement
Introduce macros to replace standby/suspend mode if they depends on
controllers that failed to map (or other errors). Macros keep track
of the complementary mode to avoid having set the same AT91 PM mode
for both suspend and standby.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 11:06:19 +03:00
Claudiu Beznea
22cbf0776d ARM: at91: pm: keep documentation inline with structure members
Move documentation of bu to keep the same order as in the structure
itself.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
2022-05-12 11:06:18 +03:00
Claudiu Beznea
f8e0f301c4 ARM: at91: Kconfig: select PM_OPP
Select PM_OPP. This is requested for CPUFreq driver.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220113144900.906370-6-claudiu.beznea@microchip.com
2022-02-25 12:36:26 +01:00
Claudiu Beznea
9584e7263e ARM: at91: PM: add cpu idle support for sama7g5
Add CPU idle support for SAMA7G5. Support will make use of PMC_CPU_RATIO
register to divide the CPU clock by 16 before switching it to idle and
use automatic self-refresh option of DDR controller.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220113144900.906370-5-claudiu.beznea@microchip.com
2022-02-25 12:36:25 +01:00
Claudiu Beznea
9a0775c9cd ARM: at91: ddr: fix typo to align with datasheet naming
Fix typo on UDDRC_PWRCTL.SELFREF_SW bitmask to align with datasheet
naming.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20220113144900.906370-4-claudiu.beznea@microchip.com
2022-02-25 12:36:25 +01:00
Wan Jiabing
bb29e40910 ARM: at91: pm: Add of_node_put() before goto
Fix following coccicheck warning:
./arch/arm/mach-at91/pm.c:643:1-33: WARNING: Function
for_each_matching_node_and_match should have of_node_put() before goto

Early exits from for_each_matching_node_and_match should decrement the
node reference counter.

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211014084555.21422-1-wanjiabing@vivo.com
2021-12-08 14:01:16 +01:00
Linus Torvalds
2219b0ceef ARM: SoC updates for v5.16
The SoC updates this time are mainly removing obsolete code from the
 OMAP2 platform, another step in the eternal cleanup of that platform.
 
 There are two new SoCs getting added: STMicroelectronics stm32mp13 and
 Microchip lan966. Both fit into existing platforms and require minimal
 changes here.
 
 A couple of MAINTAINER file updates relate to those changes, and
 update some file paths.
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Merge tag 'soc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC updates from Arnd Bergmann:
 "The SoC updates this time are mainly removing obsolete code from the
  OMAP2 platform, another step in the eternal cleanup of that platform.

  There are two new SoCs getting added: STMicroelectronics stm32mp13 and
  Microchip lan966. Both fit into existing platforms and require minimal
  changes here.

  A couple of MAINTAINER file updates relate to those changes, and
  update some file paths"

* tag 'soc-5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (28 commits)
  MAINTAINERS: Update BCM7XXX entry with additional patterns
  MAINTAINERS: add pinctrl-apple-gpio to ARM/APPLE MACHINE
  MAINTAINERS: Add pasemi i2c to ARM/APPLE MACHINE
  ARM: SPEAr: Update MAINTAINERS entries
  ARM: OMAP2+: Drop unused CM defines for am3
  ARM: OMAP2+: Drop unused CM and SCRM defines for omap4
  ARM: OMAP2+: Drop unused CM and SCRM defines for omap5
  ARM: OMAP2+: Drop unused CM defines for dra7
  ARM: OMAP2+: Drop unused PRM defines for am3
  ARM: OMAP2+: Drop unused PRM defines for am4
  ARM: OMAP2+: Drop unused PRM defines for omap4
  ARM: OMAP2+: Drop unused PRM defines for omap5
  ARM: OMAP2+: Drop unused PRM defines for dra7
  ARM: OMAP2+: Fix comment typo
  ARM: OMAP2+: Fix typo in some comments
  ARM: at91: add basic support for new SoC family lan966
  dt-bindings: arm: at91: Document lan966 pcb8291 and pcb8290 boards
  ARM: at91: Documentation: add lan966 family
  ARM: at91: Documentation: add sama7g5 family
  MAINTAINERS: add an entry for NXP S32G boards
  ...
2021-11-03 16:48:32 -07:00
Kavyasree Kotagiri
3efc443121 ARM: at91: add basic support for new SoC family lan966
This patch introduces Microchip LAN966 ARMv7 based SoC family
of multiport gigabit AVB/TSN-capable ethernet switches.
It supports two SKUs: 4-port LAN9662 with multiprotocol
processing support and 8-port LAN9668 switch.

LAN966 family includes copper and serial ethernet interfaces,
peripheral interfaces such as PCIe, USB, TWI, SPI, UART, QSPI,
SD/eMMC, Parallel Interface (PI) as well as synchronization
and trigger inputs/outputs.

Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[nicolas.ferre@microchip.com: merged patches for this SoC introduction]
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210831102138.2476-1-kavyasree.kotagiri@microchip.com
Link: https://lore.kernel.org/r/20211004105926.5696-5-kavyasree.kotagiri@microchip.com
2021-10-04 14:50:18 +02:00
Claudiu Beznea
d8d667ee02 ARM: at91: pm: preload base address of controllers in tlb
In suspend/resume procedure for AT91 architecture different controllers
(PMC, SHDWC, RAM, RAM PHY, SFRBU) are accessed to do the proper settings
for power saving. Commit f0bbf17958 ("ARM: at91: pm: add self-refresh
support for sama7g5") introduced the access to RAMC PHY controller for
SAMA7G5. The access to this controller is done after RAMC ports are
closed, thus any TLB walk necessary for RAMC PHY virtual address will
fail. In the development branch this was not encountered. However, on
current kernel the issue is reproducible.

To solve the issue the previous mechanism of pre-loading the TLB with
the RAMC PHY virtual address has been used. However, only the addition
of this new pre-load breaks the functionality for ARMv5 based
devices (SAM9X60). This behavior has been encountered previously
while debugging this code and using the same mechanism for pre-loading
address for different controllers (e.g. pin controller, the assumption
being that other requested translations are replaced from TLB).

To solve this new issue the TLB flush + the extension of pre-loading
the rest of controllers to TLB (e.g. PMC, RAMC) has been added. The
rest of the controllers should have been pre-loaded previously, anyway.

Fixes: f0bbf17958 ("ARM: at91: pm: add self-refresh support for sama7g5")
Depends-on: e42cbbe5c9 ("ARM: at91: pm: group constants and addresses loading")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210930154219.2214051-4-claudiu.beznea@microchip.com
2021-10-04 12:08:34 +02:00
Claudiu Beznea
e42cbbe5c9 ARM: at91: pm: group constants and addresses loading
Group constants and addresses loading. This commit prepares the field for
the next one.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210930154219.2214051-3-claudiu.beznea@microchip.com
2021-10-04 11:54:20 +02:00
Claudiu Beznea
ac809e7879 ARM: at91: pm: switch backup area to vbat in backup mode
Backup area is now switched to VDDIN33 at boot (with the help of
bootloader). When switching to backup mode we need to switch backup area
to VBAT as all the other power sources are cut off. The resuming from
backup mode is done with the help of bootloader, so there is no need to
do something particular in Linux to restore backup area power source.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210830100927.22711-1-claudiu.beznea@microchip.com
2021-09-14 17:05:40 +02:00
Claudiu Beznea
1605de1b3c ARM: at91: pm: do not panic if ram controllers are not enabled
In case PM is enabled but there is no RAM controller information
in DT the code will panic. Avoid such scenarios by not initializing
platform specific PM code in case RAM controller is not provided
via DT.

Reported-by: Eugen Hristev <eugen.hristev@microchip.com>
Fixes: 827de1f123 ("ARM: at91: remove at91_dt_initialize and machine init_early()")
Fixes: 892e1f4a3a ("ARM: at91: pm: add sama7g5 ddr phy controller")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210823131915.23857-2-claudiu.beznea@microchip.com
2021-09-14 16:52:26 +02:00
Claudiu Beznea
ad9bc2e35c ARM: at91: pm: add sama7g5 shdwc
Add SAMA7G5 SHDWC.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-25-claudiu.beznea@microchip.com
2021-07-19 14:32:13 +02:00
Claudiu Beznea
6501330f9f ARM: at91: pm: add pm support for SAMA7G5
Add support for SAMA7G5 power management modes: standby, ulp0, ulp1, backup.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-24-claudiu.beznea@microchip.com
2021-07-19 14:32:13 +02:00
Eugen Hristev
9d464cc5ac ARM: at91: sama7: introduce sama7 SoC family
Introduce new family of SoCs, sama7, and first SoC, sama7g5.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
[claudiu.beznea@microchip.com: keep only the sama7_dt]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-23-claudiu.beznea@microchip.com
2021-07-19 14:32:13 +02:00
Claudiu Beznea
ccdbdf33bd ARM: at91: pm: add sama7g5's pmc
Add SAMA7G5's PMC to compatible list.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-22-claudiu.beznea@microchip.com
2021-07-19 14:32:13 +02:00
Claudiu Beznea
f205adb608 ARM: at91: pm: add backup mode support for SAMA7G5
Adapt at91_pm_backup_init() to work for SAMA7G5. Also, set the LPM pin
to shutdown controller. This will signal to PMIC that it needs to switch
to the state corresponding to backup mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-21-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
d2d4716d83 ARM: at91: pm: save ddr phy calibration data to securam
The resuming from backup mode is done with the help of bootloader.
The bootloader reconfigure the DDR controller and DDR PHY controller.
To speed-up the resuming process save the PHY calibration data into
SECURAM before suspending (securam is powered on backup mode).
This data will be later used by bootloader in DDR PHY reconfiguration
process. Also, in the process or recalibration the first 8 words of
the memory may get corrupted. To solve this, these 8 words are saved
in the securam and restored by bootloader in the process of PHY
configuration.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-20-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
892e1f4a3a ARM: at91: pm: add sama7g5 ddr phy controller
SAMA7G5 self-refresh procedure accesses also the DDR PHY registers.
Adapt the code so that the at91_dt_ramc() to look also for DDR PHYs,
in case it is mandatory.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-19-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
2c26cb4d69 ARM: at91: pm: add sama7g5 ddr controller
Add SAMA7G5 DDR controller to the list of DDR controller compatibles.
At the moment there is no standby support. Adapt the code for this.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-18-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
5b0bef872c ARM: at91: pm: wait for ddr power mode off
Wait for DDR power mode off before shutting down the core.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-16-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
475be50fc1 ARM: at91: pm: add support for 2.5V LDO regulator control
Add support to disable/enable 2.5V LDO regulator when entering/exiting
any ULP mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-15-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
28eb1d40fe ARM: at91: pm: add support for MCK1..4 save/restore for ulp modes
Add support for MCK1..4 save restore for ULP modes.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-14-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
f0bbf17958 ARM: at91: pm: add self-refresh support for sama7g5
Add self-refresh support for SAMA7G5.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-13-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
15126bb61b ARM: at91: pm: add support for waiting MCK1..4
SAMA7G5 has 5 master clocks 0..4. MCK0 is controlled differently than
MCK 1..4. MCK 1..4 should also be saved/restored in the last phase of
suspend/resume. Thus, adapt wait_mckrdy to support also MCK1..4.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-10-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
e3821ed476 ARM: at91: pm: s/CONFIG_SOC_SAM9X60/CONFIG_HAVE_AT91_SAM9X60_PLL/g
Replace CONFIG_SOC_SAM9X60 with CONFIG_HAVE_AT91_SAM9X60_PLL as the
SAM9X60's PLL is also present on SAMA7G5.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-9-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
87e1b30c29 ARM: at91: pm: avoid push and pop on stack while memory is in self-refersh
For the previous AT91 RAM controller and self-refresh procedure this
had no side effects. However, for SAMA7G5 the self-refresh procedure
doesn't allow this anymore as the RAM controller ports are closed
before switching it to self-refresh. This commits prepares the code
for the following ones adding self-refresh and PM support for SAMA7G5.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-8-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
29cdf077a9 ARM: at91: pm: use r7 instead of tmp1
Use r7 instead of tmp1 in macros. This prepares the filed for
next commits.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-7-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
629ba8ee03 ARM: at91: pm: do not initialize pdev
There is no need to initialize pdev.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-6-claudiu.beznea@microchip.com
2021-07-19 14:32:12 +02:00
Claudiu Beznea
404956f47c ARM: at91: pm: check for different controllers in at91_pm_modes_init()
at91_pm_modes_init() checks for proper nodes in device tree and maps
them accordingly. Up to SAMA7G5 all AT91 SoCs had the same mapping
b/w power saving modes and different controllers needed in the
final/first steps of suspend/resume. SAMA7G5 is not aligned with the
old SoCs thus the code is adapted for this. This patch prepares
the field for next commits.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-5-claudiu.beznea@microchip.com
2021-07-19 14:32:11 +02:00
Claudiu Beznea
0a7a2443c7 ARM: at91: pm: document at91_soc_pm structure
Document at91_soc_pm structure.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-4-claudiu.beznea@microchip.com
2021-07-19 14:32:11 +02:00
Claudiu Beznea
fe4c09e568 ARM: at91: pm: move the setup of soc_pm.bu->suspended
Move the setup of soc_pm.bu->suspended in platform_suspend::begin
function so that the PMC code in charge with clocks suspend/resume
to differentiate b/w standard PM mode and backup mode.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-3-claudiu.beznea@microchip.com
2021-07-19 14:32:11 +02:00
Claudiu Beznea
f19dd1df9e ARM: at91: pm: move pm_bu to soc_pm data structure
Move pm_bu to soc_pm data structure.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210415105010.569620-2-claudiu.beznea@microchip.com
2021-07-19 14:32:11 +02:00
Eugen Hristev
56bc296591 ARM: at91: add new SoC sama7g5
Add new SoC from at91 family : sama7g5

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
[claudiu.beznea@microchip.com: Select PLL, generic clock and UTMI support, add PM configs]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210409113116.482199-1-eugen.hristev@microchip.com
Link: https://lore.kernel.org/r/20210719080317.1045832-2-claudiu.beznea@microchip.com
2021-07-19 14:32:11 +02:00
Lee Jones
41dbf4a146 ARM: at91: pm: Move prototypes to mutually included header
Both the caller and the supplier's source file should have access to
the include file containing the prototypes.

Fixes the following W=1 kernel build warning(s):

 drivers/pinctrl/pinctrl-at91.c:1637:6: warning: no previous prototype for ‘at91_pinctrl_gpio_suspend’ [-Wmissing-prototypes]
 1637 | void at91_pinctrl_gpio_suspend(void)
 | ^~~~~~~~~~~~~~~~~~~~~~~~~
 drivers/pinctrl/pinctrl-at91.c:1661:6: warning: no previous prototype for ‘at91_pinctrl_gpio_resume’ [-Wmissing-prototypes]
 1661 | void at91_pinctrl_gpio_resume(void)
 | ^~~~~~~~~~~~~~~~~~~~~~~~

Cc: Russell King <linux@armlinux.org.uk>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210303124149.3149511-1-lee.jones@linaro.org
2021-03-26 18:20:49 +01:00
Arnd Bergmann
d30337da86 ARM: at91: use proper asm syntax in pm_suspend
Compiling with the clang integrated assembler warns about
a recently added instruction:

<instantiation>:14:13: error: unknown token in expression
 ldr tmp1, =#0x00020010UL
arch/arm/mach-at91/pm_suspend.S:542:2: note: while in macro instantiation
 at91_plla_enable

Remove the extra '#' character that is not used for the 'ldr'
instruction when doing an indirect load of a constant.

Fixes: 4fd36e4583 ("ARM: at91: pm: add plla disable/enable support for sam9x60")
Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20210204160129.2249394-1-arnd@kernel.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-02-08 15:54:05 +01:00
Alexandre Belloni
faf6dc64c4 ARM: at91: pm: remove unnecessary at91sam9x60_idle
cpu_do_idle() is already the default action for arm_pm_idle, there is no
need to open code it.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20200804115622.63232-1-alexandre.belloni@bootlin.com
2020-08-17 11:18:59 +02:00
Claudiu Beznea
e222f94351 ARM: at91: pm: of_node_put() after its usage
Put node after it has been used.

Fixes: 13f16017d3 ("ARM: at91: pm: Tie the USB clock mask to the pmc")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1596616610-15460-4-git-send-email-claudiu.beznea@microchip.com
2020-08-17 11:18:17 +02:00
Claudiu Beznea
39add36049 ARM: at91: pm: add per soc validation of pm modes
Not all SoCs supports all the PM mode. User may end up settings,
e.g. backup mode, on a non SAMA5D2 device, but the mode to not be valid.
If backup mode is used on a devices not supporting it there will be no
way of resuming other than rebooting.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1596616610-15460-3-git-send-email-claudiu.beznea@microchip.com
2020-08-17 11:18:17 +02:00
Claudiu Beznea
e70bfc2fa8 ARM: at91: pm: add support for ULP0 fast wakeup
ULP0 fast improves suspend/resume time with few milliseconds the drawback
being the power consumption. The mean values measured for suspend/resume
time are as follows (measured on SAMA5D2 Xplained board), ULP0 compared
with fast ULP0:
- ulp0 fast: suspend time: 169 ms, resume time: 216 ms
- ulp0     : suspend time: 197 ms, resume time: 258 ms

Current consumption while suspended (measured on SAMA5D2 Xplained board):
- ulp0 fast: 730uA
- ulp0     : 270uA

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1596616610-15460-2-git-send-email-claudiu.beznea@microchip.com
2020-08-17 11:18:17 +02:00
Alexander A. Klimov
f3a49f1784 ARM: at91: Replace HTTP links with HTTPS ones
Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200713065859.31770-1-grandmaster@al2klimov.de
2020-07-18 00:59:26 +02:00
yu kuai
f87a4f022c ARM: at91: pm: add missing put_device() call in at91_pm_sram_init()
if of_find_device_by_node() succeed, at91_pm_sram_init() doesn't have
a corresponding put_device(). Thus add a jump target to fix the exception
handling for this function implementation.

Fixes: d2e4679055 ("ARM: at91: pm: use the mmio-sram pool to access SRAM")
Signed-off-by: yu kuai <yukuai3@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20200604123301.3905837-1-yukuai3@huawei.com
2020-07-18 00:58:07 +02:00
Linus Torvalds
0e8fb69f28 ARM: SoC updates
The code changes are mostly for 32-bit platforms and include:
 
 - Lots of updates for the Nvidia Tegra platform, including
   cpuidle, pmc, and dt-binding changes
 
 - Microchip at91 power management updates for the recently added
   sam9x60 SoC
 
 - Treewide setup_irq deprecation by afzal mohammed
 
 - STMicroelectronics stm32 gains earlycon support
 
 - Renesas platforms with Cortex-A9 can now use the global timer
 
 - Some TI OMAP2+ platforms gain cpuidle support
 
 - Various cleanups for the i.MX6 and Orion platforms, as well as
   Kconfig files across all platforms
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'arm-soc-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC updates from Arnd Bergmann:
 "The code changes are mostly for 32-bit platforms and include:

   - Lots of updates for the Nvidia Tegra platform, including cpuidle,
     pmc, and dt-binding changes

   - Microchip at91 power management updates for the recently added
     sam9x60 SoC

   - Treewide setup_irq deprecation by afzal mohammed

   - STMicroelectronics stm32 gains earlycon support

   - Renesas platforms with Cortex-A9 can now use the global timer

   - Some TI OMAP2+ platforms gain cpuidle support

   - Various cleanups for the i.MX6 and Orion platforms, as well as
     Kconfig files across all platforms"

* tag 'arm-soc-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (75 commits)
  ARM: qcom: Add support for IPQ40xx
  ARM: mmp: replace setup_irq() by request_irq()
  ARM: cns3xxx: replace setup_irq() by request_irq()
  ARM: spear: replace setup_irq() by request_irq()
  ARM: ep93xx: Replace setup_irq() by request_irq()
  ARM: iop32x: replace setup_irq() by request_irq()
  arm: mach-dove: Mark dove_io_desc as __maybe_unused
  ARM: orion: replace setup_irq() by request_irq()
  ARM: debug: stm32: add UART early console support for STM32MP1
  ARM: debug: stm32: add UART early console support for STM32H7
  ARM: debug: stm32: add UART early console configuration for STM32F7
  ARM: debug: stm32: add UART early console configuration for STM32F4
  cpuidle: tegra: Disable CC6 state if LP2 unavailable
  cpuidle: tegra: Squash Tegra114 driver into the common driver
  cpuidle: tegra: Squash Tegra30 driver into the common driver
  cpuidle: Refactor and move out NVIDIA Tegra20 driver into drivers/cpuidle
  ARM: tegra: cpuidle: Remove unnecessary memory barrier
  ARM: tegra: cpuidle: Make abort_flag atomic
  ARM: tegra: cpuidle: Handle case where secondary CPU hangs on entering LP2
  ARM: tegra: Make outer_disable() open-coded
  ...
2020-04-03 15:02:35 -07:00
Masahiro Yamada
d198b34f38 .gitignore: add SPDX License Identifier
Add SPDX License Identifier to all .gitignore files.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-25 11:50:48 +01:00
Claudiu Beznea
bb1a0e87e1 ARM: at91: pm: add quirk for sam9x60's ulp1
On SAM9X60 2 nop operations has to be introduced after setting
WAITMODE bit in CKGR_MOR.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/1579522208-19523-9-git-send-email-claudiu.beznea@microchip.com
2020-02-18 21:47:54 +01:00