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author | 2020-01-08 10:26:26 -0800 | |
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committer | 2020-01-08 10:26:29 -0800 | |
commit | 40a9012a3b24334796403491b317a83935719809 (patch) | |
tree | 66d96124571e0bf70253b57e74bfb5885804e645 /drivers/base/power/domain.c | |
parent | Merge tag 'renesas-drivers-for-v5.6-tag1' of git://git.kernel.org/pub/scm/lin... (diff) | |
parent | arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916 (diff) | |
download | linux-40a9012a3b24334796403491b317a83935719809.tar.gz linux-40a9012a3b24334796403491b317a83935719809.tar.bz2 linux-40a9012a3b24334796403491b317a83935719809.zip |
Merge tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm into arm/drivers
Initial support for hierarchical CPU arrangement, managed by PSCI and its
corresponding cpuidle driver. This support is based upon using the generic
PM domain, which already supports devices belonging to CPUs.
Finally, these is a DTS patch that enables the hierarchical topology to be
used for the Qcom 410c Dragonboard, which supports the PSCI OS-initiated
mode.
* tag 'cpuidle_psci-v5.5-rc4' of git://git.linaro.org/people/ulf.hansson/linux-pm: (611 commits)
arm64: dts: Convert to the hierarchical CPU topology layout for MSM8916
cpuidle: psci: Add support for PM domains by using genpd
PM / Domains: Introduce a genpd OF helper that removes a subdomain
cpuidle: psci: Support CPU hotplug for the hierarchical model
cpuidle: psci: Manage runtime PM in the idle path
cpuidle: psci: Prepare to use OS initiated suspend mode via PM domains
cpuidle: psci: Attach CPU devices to their PM domains
cpuidle: psci: Add a helper to attach a CPU to its PM domain
cpuidle: psci: Support hierarchical CPU idle states
cpuidle: psci: Simplify OF parsing of CPU idle state nodes
cpuidle: dt: Support hierarchical CPU idle states
of: base: Add of_get_cpu_state_node() to get idle states for a CPU node
firmware: psci: Export functions to manage the OSI mode
dt: psci: Update DT bindings to support hierarchical PSCI states
cpuidle: psci: Align psci_power_state count with idle state count
Linux 5.5-rc4
locks: print unsigned ino in /proc/locks
riscv: export flush_icache_all to modules
riscv: reject invalid syscalls below -1
riscv: fix compile failure with EXPORT_SYMBOL() & !MMU
...
Link: https://lore.kernel.org/r/20200102160820.3572-1-ulf.hansson@linaro.org
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'drivers/base/power/domain.c')
-rw-r--r-- | drivers/base/power/domain.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 8e5725b11ee8..959d6d5eb000 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2303,6 +2303,44 @@ out: EXPORT_SYMBOL_GPL(of_genpd_add_subdomain); /** + * of_genpd_remove_subdomain - Remove a subdomain from an I/O PM domain. + * @parent_spec: OF phandle args to use for parent PM domain look-up + * @subdomain_spec: OF phandle args to use for subdomain look-up + * + * Looks-up a parent PM domain and subdomain based upon phandle args + * provided and removes the subdomain from the parent PM domain. Returns a + * negative error code on failure. + */ +int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec, + struct of_phandle_args *subdomain_spec) +{ + struct generic_pm_domain *parent, *subdomain; + int ret; + + mutex_lock(&gpd_list_lock); + + parent = genpd_get_from_provider(parent_spec); + if (IS_ERR(parent)) { + ret = PTR_ERR(parent); + goto out; + } + + subdomain = genpd_get_from_provider(subdomain_spec); + if (IS_ERR(subdomain)) { + ret = PTR_ERR(subdomain); + goto out; + } + + ret = pm_genpd_remove_subdomain(parent, subdomain); + +out: + mutex_unlock(&gpd_list_lock); + + return ret; +} +EXPORT_SYMBOL_GPL(of_genpd_remove_subdomain); + +/** * of_genpd_remove_last - Remove the last PM domain registered for a provider * @provider: Pointer to device structure associated with provider * |