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Wysocki" , Kevin Hilman , Ulf Hansson , Len Brown , Pavel Machek , Greg Kroah-Hartman , Saravana Kannan Cc: Bjorn Andersson , linux-pm@vger.kernel.org, Linux Kernel Mailing List , linux-arm-msm@vger.kernel.org, Dmitry Baryshkov Subject: [RFC PATCH v5 4/4] PM: domains: Add and set generic sync state callback Date: Wed, 21 Jun 2023 17:40:19 +0300 Message-Id: <20230621144019.3219858-5-abel.vesa@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230621144019.3219858-1-abel.vesa@linaro.org> References: <20230621144019.3219858-1-abel.vesa@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For every provider that doesn't register a sync_state callback, register a generic one. This new generic sync_state callback queues up a power off request. Signed-off-by: Abel Vesa --- drivers/base/power/domain.c | 23 +++++++++++++++++++++++ include/linux/pm_domain.h | 3 +++ 2 files changed, 26 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 5967ade160e2..ec16db0599ac 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -654,6 +654,27 @@ static void genpd_queue_power_off_work(struct generic_pm_domain *genpd) queue_work(pm_wq, &genpd->power_off_work); } +/** + * pm_genpd_power_off_unused_sync_state - Power off all domains for provider. + * @dev: Provider's device. + * + * Request power off for all unused domains of the provider. + * This should be used exclusively as sync state callback for genpd providers. + */ +void pm_genpd_power_off_unused_sync_state(struct device *dev) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + if (genpd->provider && genpd->provider->dev == dev) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); +} +EXPORT_SYMBOL_GPL(pm_genpd_power_off_unused_sync_state); + /** * genpd_keep_on - Tells if the domain should skip the power 'off' request * @genpd: PM domain to be checked. @@ -2329,6 +2350,8 @@ static int genpd_add_provider(struct device_node *np, genpd_xlate_t xlate, cp->xlate = xlate; fwnode_dev_initialized(&np->fwnode, true); + dev_set_drv_sync_state(np->fwnode.dev, pm_genpd_power_off_unused_sync_state); + mutex_lock(&of_genpd_mutex); list_add(&cp->link, &of_genpd_providers); mutex_unlock(&of_genpd_mutex); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 3eb32c4b6d4f..78164244b89f 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -279,6 +279,9 @@ static inline int pm_genpd_remove(struct generic_pm_domain *genpd) return -EOPNOTSUPP; } +static inline void pm_genpd_power_off_unused_sync_state(struct device *dev) +{ } + static inline int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state) {