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[158.174.22.210]) by smtp.gmail.com with ESMTPSA id q21sm3449365lfa.84.2019.05.13.12.23.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 12:23:27 -0700 (PDT) From: Ulf Hansson To: Sudeep Holla , Lorenzo Pieralisi , Mark Rutland , linux-arm-kernel@lists.infradead.org Cc: "Rafael J . Wysocki" , Daniel Lezcano , "Raju P . L . S . S . S . N" , Amit Kucheria , Bjorn Andersson , Stephen Boyd , Niklas Cassel , Tony Lindgren , Kevin Hilman , Lina Iyer , Viresh Kumar , Vincent Guittot , Geert Uytterhoeven , Souvik Chakravarty , linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Ulf Hansson Subject: [PATCH 12/18] drivers: firmware: psci: Add a helper to attach a CPU to its PM domain Date: Mon, 13 May 2019 21:22:54 +0200 Message-Id: <20190513192300.653-13-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190513192300.653-1-ulf.hansson@linaro.org> References: <20190513192300.653-1-ulf.hansson@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID: <20190513192254.FrHcGoBI-jjjxiObUWGXmIFwbGCJ_YChICqHu-DvAT4@z> Introduce a new PSCI DT helper function, psci_dt_attach_cpu(), which takes a CPU number as an in-parameter and tries to attach the CPU's struct device to its corresponding PM domain. Let's use dev_pm_domain_attach_by_name(), as to be able to specify "psci" as the required "power-domain-names". Additionally, let the helper prepare the CPU to be power managed via runtime PM. Signed-off-by: Ulf Hansson --- Changes: - Take into account whether the CPU is online/offline. - Convert from dev_pm_domain_attach() into using the more future proof dev_pm_domain_attach_by_name(). --- drivers/firmware/psci/psci.h | 3 +++ drivers/firmware/psci/psci_pm_domain.c | 17 +++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/firmware/psci/psci.h b/drivers/firmware/psci/psci.h index c36e0e6649e9..b4254405b8ef 100644 --- a/drivers/firmware/psci/psci.h +++ b/drivers/firmware/psci/psci.h @@ -4,6 +4,7 @@ #define __PSCI_H struct cpuidle_driver; +struct device; struct device_node; int psci_set_osi_mode(void); @@ -16,10 +17,12 @@ int psci_dt_parse_state_node(struct device_node *np, u32 *state); int psci_dt_init_pm_domains(struct device_node *np); int psci_dt_pm_domains_parse_states(struct cpuidle_driver *drv, struct device_node *cpu_node, u32 *psci_states); +struct device *psci_dt_attach_cpu(int cpu); #else static inline int psci_dt_init_pm_domains(struct device_node *np) { return 0; } static inline int psci_dt_pm_domains_parse_states(struct cpuidle_driver *drv, struct device_node *cpu_node, u32 *psci_states) { return 0; } +static inline struct device *psci_dt_attach_cpu(int cpu) { return NULL; } #endif #endif diff --git a/drivers/firmware/psci/psci_pm_domain.c b/drivers/firmware/psci/psci_pm_domain.c index 3aa645dba81b..1cbe745ee001 100644 --- a/drivers/firmware/psci/psci_pm_domain.c +++ b/drivers/firmware/psci/psci_pm_domain.c @@ -12,8 +12,10 @@ #include #include #include +#include #include #include +#include #include #include @@ -383,4 +385,19 @@ int psci_dt_pm_domains_parse_states(struct cpuidle_driver *drv, return 0; } + +struct device *psci_dt_attach_cpu(int cpu) +{ + struct device *dev, *cpu_dev = get_cpu_device(cpu); + + dev = dev_pm_domain_attach_by_name(cpu_dev, "psci"); + if (IS_ERR_OR_NULL(dev)) + return dev; + + pm_runtime_irq_safe(dev); + if (cpu_online(cpu)) + pm_runtime_get_sync(dev); + + return dev; +} #endif -- 2.17.1