linux-kernel - [RFC PATCH 5/9] PM: domains: Add of_genpd_add_provider_simple

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Date:   Tue, 12 Oct 2021 01:57:03 +0900
From:   Hector Martin <marcan@...can.st>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Hector Martin <marcan@...can.st>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Sven Peter <sven@...npeter.dev>, Marc Zyngier <maz@...nel.org>,
        Mark Kettenis <mark.kettenis@...all.nl>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Catalin Marinas <catalin.marinas@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 5/9] PM: domains: Add of_genpd_add_provider_simple_noclk()

This is analogous to of_genpd_add_provider_simple(), but calls
dev_pm_opp_of_add_table_noclk() instead of dev_pm_opp_of_add_table().

Signed-off-by: Hector Martin <marcan@...can.st>
---
 drivers/base/power/domain.c | 39 +++++++++++++++++++++++++++++--------
 include/linux/pm_domain.h   |  8 ++++++++
 2 files changed, 39 insertions(+), 8 deletions(-)

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 5db704f02e71..3377b9dd514c 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2227,13 +2227,9 @@ static bool genpd_present(const struct generic_pm_domain *genpd)
 	return ret;
 }
 
-/**
- * of_genpd_add_provider_simple() - Register a simple PM domain provider
- * @np: Device node pointer associated with the PM domain provider.
- * @genpd: Pointer to PM domain associated with the PM domain provider.
- */
-int of_genpd_add_provider_simple(struct device_node *np,
-				 struct generic_pm_domain *genpd)
+static int _of_genpd_add_provider_simple(struct device_node *np,
+					 struct generic_pm_domain *genpd,
+					 bool getclk)
 {
 	int ret;
 
@@ -2247,7 +2243,10 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	/* Parse genpd OPP table */
 	if (genpd->set_performance_state) {
-		ret = dev_pm_opp_of_add_table(&genpd->dev);
+		if (getclk)
+			ret = dev_pm_opp_of_add_table(&genpd->dev);
+		else
+			ret = dev_pm_opp_of_add_table_noclk(&genpd->dev, 0);
 		if (ret) {
 			if (ret != -EPROBE_DEFER)
 				dev_err(&genpd->dev, "Failed to add OPP table: %d\n",
@@ -2278,8 +2277,32 @@ int of_genpd_add_provider_simple(struct device_node *np,
 
 	return 0;
 }
+
+/**
+ * of_genpd_add_provider_simple() - Register a simple PM domain provider
+ * @np: Device node pointer associated with the PM domain provider.
+ * @genpd: Pointer to PM domain associated with the PM domain provider.
+ */
+int of_genpd_add_provider_simple(struct device_node *np,
+				 struct generic_pm_domain *genpd)
+{
+	return _of_genpd_add_provider_simple(np, genpd, true);
+}
 EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple);
 
+/**
+ * of_genpd_add_provider_simple_noclk() - Register a simple clockless
+ *   PM domain provider
+ * @np: Device node pointer associated with the PM domain provider.
+ * @genpd: Pointer to PM domain associated with the PM domain provider.
+ */
+int of_genpd_add_provider_simple_noclk(struct device_node *np,
+				       struct generic_pm_domain *genpd)
+{
+	return _of_genpd_add_provider_simple(np, genpd, false);
+}
+EXPORT_SYMBOL_GPL(of_genpd_add_provider_simple_noclk);
+
 /**
  * of_genpd_add_provider_onecell() - Register a onecell PM domain provider
  * @np: Device node pointer associated with the PM domain provider.
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index 67017c9390c8..db3f75612512 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -316,6 +316,8 @@ struct genpd_onecell_data {
 #ifdef CONFIG_PM_GENERIC_DOMAINS_OF
 int of_genpd_add_provider_simple(struct device_node *np,
 				 struct generic_pm_domain *genpd);
+int of_genpd_add_provider_simple_noclk(struct device_node *np,
+				       struct generic_pm_domain *genpd);
 int of_genpd_add_provider_onecell(struct device_node *np,
 				  struct genpd_onecell_data *data);
 void of_genpd_del_provider(struct device_node *np);
@@ -342,6 +344,12 @@ static inline int of_genpd_add_provider_simple(struct device_node *np,
 	return -EOPNOTSUPP;
 }
 
+static inline int of_genpd_add_provider_simple_noclk(struct device_node *np,
+					struct generic_pm_domain *genpd)
+{
+	return -EOPNOTSUPP;
+}
+
 static inline int of_genpd_add_provider_onecell(struct device_node *np,
 					struct genpd_onecell_data *data)
 {
-- 
2.33.0