[PATCH 0/2] Enabling PSCI based idle on ARM 32-bit platforms
lorenzo.pieralisi at arm.com
Thu Oct 1 01:58:51 PDT 2015
PSCI firmware provides a kernel API that, through a standard interface,
allows to manage power states transitions in a seamless manner for
ARM and ARM64 systems.
Current PSCI code that initializes CPUidle states on PSCI based
systems lives in arch/arm64 directory but it is not ARM64 specific
and can be shared with ARM 32-bit systems so that the generic
ARM CPUidle driver can leverage the common PSCI interface.
This patch series moves PSCI CPUidle management code to
drivers/firmware directory so that ARM and ARM64 architecture
can actually share the code.
It is made up of two patches:
Patch 1 refactors ARM 32-bit generic idle implementation to make it
compliant with ARM64 CPUidle operations, and patches the existing
CPUidle implementation based on the generic CPUidle driver.
Patch 2 moves ARM64 PSCI CPUidle functions implementation to
drivers/firmware so that it can be shared with ARM 32-bit platforms
code. This patch also adds a PSCI entry section on ARM 32-bit systems
so that the PSCI CPUidle back-end can be enabled when the enable-method
corresponds to PSCI.
Patches apply on top of current patch stack to enable PSCI 1.0:
Tested on Juno board (ARM64), compile tested only on ARM 32-bit systems.
Lorenzo Pieralisi (2):
ARM: cpuidle: make cpuidle_ops interfaces ARM64 compliant
ARM64: kernel: PSCI: move PSCI idle management code to
arch/arm/include/asm/cpuidle.h | 4 +-
arch/arm/kernel/cpuidle.c | 4 +-
arch/arm64/kernel/psci.c | 99 +--------------------------------
drivers/firmware/Makefile | 2 +-
drivers/firmware/psci_cpuops.c | 121 +++++++++++++++++++++++++++++++++++++++++
drivers/soc/qcom/spm.c | 9 ++-
include/linux/psci.h | 3 +
7 files changed, 138 insertions(+), 104 deletions(-)
create mode 100644 drivers/firmware/psci_cpuops.c
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