From: Ulf Hansson <ulf.hansson@linaro.org> To: "Rafael J . Wysocki" <rjw@rjwysocki.net>, linux-pm@vger.kernel.org Cc: Ulf Hansson <ulf.hansson@linaro.org>, Lucas Stach <dev@lynxeye.de>, Geert Uytterhoeven <geert+renesas@glider.be>, Kevin Hilman <khilman@kernel.org>, Viresh Kumar <viresh.kumar@linaro.org>, Jon Hunter <jonathanh@nvidia.com>, Todor Tomov <todor.tomov@linaro.org>, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, Rajendra Nayak <rnayak@codeaurora.org>, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/3] PM / Domains: Introduce option to attach a device by name to genpd Date: Fri, 29 Jun 2018 13:04:31 +0200 [thread overview] Message-ID: <20180629110432.5179-3-ulf.hansson@linaro.org> (raw) In-Reply-To: <20180629110432.5179-1-ulf.hansson@linaro.org> For the multiple PM domain case, let's introduce a new function called genpd_dev_pm_attach_by_name(). This allows a device to be associated with its PM domain through genpd, by using a name based lookup. Note that, genpd_dev_pm_attach_by_name() shall only be called by the driver core / PM core, similar to how the existing dev_pm_domain_attach_by_id() makes use of genpd_dev_pm_attach_by_id(). However, this is implemented by following changes on top. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/base/power/domain.c | 24 ++++++++++++++++++++++++ include/linux/pm_domain.h | 8 ++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index c298de8a8308..a70e4b7a3b14 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2372,6 +2372,30 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach_by_id); +/** + * genpd_dev_pm_attach_by_name - Associate a device with one of its PM domains. + * @dev: The device used to lookup the PM domain. + * @name: The name of the PM domain. + * + * Parse device's OF node to find a PM domain specifier using the + * power-domain-names DT property. For further description see + * genpd_dev_pm_attach_by_id(). + */ +struct device *genpd_dev_pm_attach_by_name(struct device *dev, char *name) +{ + int index; + + if (!dev->of_node) + return NULL; + + index = of_property_match_string(dev->of_node, "power-domain-names", + name); + if (index < 0) + return NULL; + + return genpd_dev_pm_attach_by_id(dev, index); +} + static const struct of_device_id idle_state_match[] = { { .compatible = "domain-idle-state", }, { } diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index cb8d84090cfb..03e14a38462d 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -239,6 +239,8 @@ unsigned int of_genpd_opp_to_performance_state(struct device *dev, int genpd_dev_pm_attach(struct device *dev); struct device *genpd_dev_pm_attach_by_id(struct device *dev, unsigned int index); +struct device *genpd_dev_pm_attach_by_name(struct device *dev, + char *name); #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */ static inline int of_genpd_add_provider_simple(struct device_node *np, struct generic_pm_domain *genpd) @@ -290,6 +292,12 @@ static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev, return NULL; } +static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev, + char *name) +{ + return NULL; +} + static inline struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) { -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: ulf.hansson@linaro.org (Ulf Hansson) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/3] PM / Domains: Introduce option to attach a device by name to genpd Date: Fri, 29 Jun 2018 13:04:31 +0200 [thread overview] Message-ID: <20180629110432.5179-3-ulf.hansson@linaro.org> (raw) In-Reply-To: <20180629110432.5179-1-ulf.hansson@linaro.org> For the multiple PM domain case, let's introduce a new function called genpd_dev_pm_attach_by_name(). This allows a device to be associated with its PM domain through genpd, by using a name based lookup. Note that, genpd_dev_pm_attach_by_name() shall only be called by the driver core / PM core, similar to how the existing dev_pm_domain_attach_by_id() makes use of genpd_dev_pm_attach_by_id(). However, this is implemented by following changes on top. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> --- drivers/base/power/domain.c | 24 ++++++++++++++++++++++++ include/linux/pm_domain.h | 8 ++++++++ 2 files changed, 32 insertions(+) diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index c298de8a8308..a70e4b7a3b14 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2372,6 +2372,30 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev, } EXPORT_SYMBOL_GPL(genpd_dev_pm_attach_by_id); +/** + * genpd_dev_pm_attach_by_name - Associate a device with one of its PM domains. + * @dev: The device used to lookup the PM domain. + * @name: The name of the PM domain. + * + * Parse device's OF node to find a PM domain specifier using the + * power-domain-names DT property. For further description see + * genpd_dev_pm_attach_by_id(). + */ +struct device *genpd_dev_pm_attach_by_name(struct device *dev, char *name) +{ + int index; + + if (!dev->of_node) + return NULL; + + index = of_property_match_string(dev->of_node, "power-domain-names", + name); + if (index < 0) + return NULL; + + return genpd_dev_pm_attach_by_id(dev, index); +} + static const struct of_device_id idle_state_match[] = { { .compatible = "domain-idle-state", }, { } diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index cb8d84090cfb..03e14a38462d 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -239,6 +239,8 @@ unsigned int of_genpd_opp_to_performance_state(struct device *dev, int genpd_dev_pm_attach(struct device *dev); struct device *genpd_dev_pm_attach_by_id(struct device *dev, unsigned int index); +struct device *genpd_dev_pm_attach_by_name(struct device *dev, + char *name); #else /* !CONFIG_PM_GENERIC_DOMAINS_OF */ static inline int of_genpd_add_provider_simple(struct device_node *np, struct generic_pm_domain *genpd) @@ -290,6 +292,12 @@ static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev, return NULL; } +static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev, + char *name) +{ + return NULL; +} + static inline struct generic_pm_domain *of_genpd_remove_last(struct device_node *np) { -- 2.17.1
next prev parent reply other threads:[~2018-06-29 11:04 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-06-29 11:04 [PATCH 0/3] PM / Domains: Enable name based lookup at attach Ulf Hansson 2018-06-29 11:04 ` Ulf Hansson 2018-06-29 11:04 ` [PATCH 1/3] PM / Domains: dt: Add a power-domain-names property Ulf Hansson 2018-06-29 11:04 ` Ulf Hansson 2018-06-29 11:07 ` Ulf Hansson 2018-06-29 11:07 ` Ulf Hansson 2018-06-29 11:04 ` Ulf Hansson [this message] 2018-06-29 11:04 ` [PATCH 2/3] PM / Domains: Introduce option to attach a device by name to genpd Ulf Hansson 2018-06-29 11:04 ` [PATCH 3/3] PM / Domains: Introduce dev_pm_domain_attach_by_name() Ulf Hansson 2018-06-29 11:04 ` Ulf Hansson 2018-07-02 6:20 ` [PATCH 0/3] PM / Domains: Enable name based lookup at attach Rajendra Nayak 2018-07-02 6:20 ` Rajendra Nayak 2018-07-02 7:08 ` Viresh Kumar 2018-07-02 7:08 ` Viresh Kumar 2018-07-09 10:06 ` Rafael J. Wysocki 2018-07-09 10:06 ` Rafael J. Wysocki 2018-07-09 11:38 ` Ulf Hansson 2018-07-09 11:38 ` Ulf Hansson 2018-07-11 9:43 ` Rafael J. Wysocki 2018-07-11 9:43 ` Rafael J. Wysocki
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20180629110432.5179-3-ulf.hansson@linaro.org \ --to=ulf.hansson@linaro.org \ --cc=dev@lynxeye.de \ --cc=geert+renesas@glider.be \ --cc=jonathanh@nvidia.com \ --cc=khilman@kernel.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-arm-msm@vger.kernel.org \ --cc=linux-pm@vger.kernel.org \ --cc=linux-tegra@vger.kernel.org \ --cc=rjw@rjwysocki.net \ --cc=rnayak@codeaurora.org \ --cc=todor.tomov@linaro.org \ --cc=viresh.kumar@linaro.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.