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This patch adds support for cpuidle with CPU powerdown,
there will be 3 idle states in Linux kernel:
1: wfi;
2: cpu power down;
3: cluster power down.
As Linux kernel needs a broadcast timer for waking up
CPU when whole CLUSTER is powerdown, GPT is adopted as
broadcast timer, and to make the clock & power management
easy for Linux kernel to avoid many workaround/hake in
Linux kernel, TF-A will handle GPT's power & clock management
as well as registers save/restore when suspend/resume.
Also, psci power states are used to determine CORE/CLUSTER/SYSTEM
power state to distinguish CPU idle and SYSTEM suspend which share
same domain_suspend callback.
The SoC IPs register mmap regions are merged into 1 large
section to cover all the SoC IPs register ranges TF-A needs,
this is to save mmap regions and make it simple.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Using sc_pm_set_cpu_resume API instead of sc_pm_set_cpu_resume_addr
to support random CPU resume for system suspend, as Linux kernel
now supports non CPU0 suspend, we have to specify the CPU ID for
SCFW to wake up when system resume.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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SCFW has supported DDR retention, so now DRC can be
into OFF mode instead of STBY when Linux suspend.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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SC_R_IRQSTR_SCU2 can be OFF in system suspend if there
is no wakeup irq enabled from non-secure OS partion.
Add wakeup source check to decide if turning off
SC_R_IRQSTR_SCU2 or NOT when suspend.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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DB is NOT necessary for irqsteer on i.MX8QXP,
it can be OFF when linux suspend.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Add MU power off support for suspend, it needs
to be re-initialized after system resume.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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make sure to put IRQSTEER SCU into correct power modes.
Signed-off-by: Nitin Garg <nitin.garg@nxp.com>
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clean up the license identifier with short SPDX short identifier.
Signed-off-by: Bai Ping <ping.bai@nxp.com>
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In order to save power when AP side is suspend,
the DBLOG need to be put into low power mode.
GIC need to be power off to save power. before GIC
power off, we need to save the GIC setting, then
after resume, we need to restore the gic setting.
irqsteer need to be used to wakeup the AP side
when wakeup interrupt is pending for AP side.
Signed-off-by: Bai Ping <ping.bai@nxp.com>
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Enable USE_COHERENT_MEM feature to make sure no cache
coherence issue and avoid cache operations in many places;
Add return value for cpu kill function.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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1. Request to DRC switch to STBY in low power.
2. Set GIC to LP mode once GIC interface has been disabled in low power flow.
Signed-off-by: Ranjani Vaidyanathan <Ranjani.Vaidyanathan@nxp.com>
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Add power off interface for Linux. Currently poweroff the whole board,may
change to poweroff partition if necessary.
sync with the below scfw commit:
commit 0e1f8aa5d6c6a6d9b8c05d5a84bbd613b301d367
Author: Chuck Cannon <chuck.cannon@freescale.com>
Date: Tue Nov 28 13:56:29 2017 -0600
Use SC_R_BOARD_R1 to control the base board reset.
Signed-off-by: Chuck Cannon <chuck.cannon@freescale.com>
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
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system interconnect etc.
Signed-off-by: Ranjani Vaidyanathan <Ranjani.Vaidyanathan@nxp.com>
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Request A35 cluster low power mode to off to SCFW,
when suspend, SCFW will turn off A35 cluster.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Add suspend/resume support with all CPUs power down.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Add system_off pcsi callback to avoid below kernel
message when doing power off:
[11613.953711] reboot: Power down
[11613.958318] systemd-shutdow: 8 output lines suppressed due to ratelimiting
[11613.965285] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00
[11613.965285]
[11613.974441] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.9.11-03354-g0e1
[11613.982369] Hardware name: Freescale i.MX8QXP LPDDR4 ARM2 (DT)
[11613.988216] Call trace:
[11613.990681] [<ffff0000080882bc>] dump_backtrace+0x0/0x1a8
[11613.996092] [<ffff000008088478>] show_stack+0x14/0x1c
[11614.001154] [<ffff0000083aaf98>] dump_stack+0x8c/0xac
[11614.006213] [<ffff000008162aac>] panic+0x124/0x28c
[11614.011016] [<ffff0000080c0b20>] complete_and_exit+0x0/0x20
[11614.016600] [<ffff0000080dc6d8>] SyS_reboot+0x168/0x244
[11614.021829] [<ffff000008082ef0>] el0_svc_naked+0x24/0x28
[11614.027153] Kernel Offset: disabled
[11614.030646] Memory Limit: none
[11614.040755] ---[ end Kernel panic - not syncing: Attempted to kill init! exi0
[11614.040755]
As there is no system power off SCFW API available now, so just
simply do wfi and never return when system_off is called.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Add i.MX8QXP board reset support.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
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Add i.MX8QXP platform support.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Bai Ping <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
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