[PATCH v5 0/3] Add Qualcomm MPM irqchip driver support

Shawn Guo
2022-02-16T13:28:50Z

It starts from updating cpuidle-psci driver to send CPU_CLUSTER_PM_ENTER
notification, and then adds DT binding and driver support for Qualcomm
MPM (MSM Power Manager) interrupt controller.

Changes for v5:
- Drop inline attributes and let compiler to decide
- Use _irqsave/_irqrestore flavour for spin lock
- Assignment on a single for irq_resolve_mapping() call
- Add documentation to explain vMPM ownership transition
- Move MPM pin map data into device tree and so use a generic compatible
- Drop the code that counts CPUs in PM and use CPU_CLUSTER_PM_ENTER
notification instead

Changes for v4:
- Add the missing include of <linux/interrupt.h> to fix build errors
on arm architecture.
- Leave IRQCHIP_PLATFORM_DRIVER infrastructural unchanged, and use
of_find_device_by_node() to get platform_device pointer.

Changes for v3:
- Support module build
- Use relaxed accessors
- Add barrier call to ensure MMIO write completes
- Use d->chip_data to pass driver private data
- Use raw spinlock
- USe BIT() for bit shift
- Create a single irq domain to cover both types of MPM pins
- Call irq_resolve_mapping() to find out Linux irq number
- Save the use of ternary conditional operator and use switch/case for
.irq_set_type call
- Drop unnecessary .irq_disable hook
- Align qcom_mpm_chip and qcom_mpm_ops members vertically
- Use helper irq_domain_translate_twocell()
- Move mailbox requesting forward in probe function
- Improve the documentation on qcm2290_gic_pins[]
- Use IRQCHIP_PLATFORM_DRIVER infrastructural
- Use cpu_pm notifier instead of .suspend_late hook to write MPM for
sleep, so that MPM can be set up for both suspend and idle context.
The TIMER0/1 setup is currently omitted for idle use case though,
as I haven't been able to successfully test the idle context.

Shawn Guo (3):
cpuidle: psci: Call cpu_cluster_pm_enter() on the last CPU
dt-bindings: interrupt-controller: Add Qualcomm MPM support
irqchip: Add Qualcomm MPM controller driver

.../interrupt-controller/qcom,mpm.yaml | 94 ++++
drivers/cpuidle/cpuidle-psci.c | 13 +
drivers/irqchip/Kconfig | 8 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/qcom-mpm.c | 440 ++++++++++++++++++
5 files changed, 556 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/qcom,mpm.yaml
create mode 100644 drivers/irqchip/qcom-mpm.c

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2.17.1