linux-kernel - [PATCH 6/7] clk: samsung: exynos850: Enable PM support in clk-exynos850

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Message-Id: <20230308233822.31180-7-semen.protsenko@linaro.org>
Date:   Wed,  8 Mar 2023 17:38:21 -0600
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Chanho Park <chanho61.park@...sung.com>,
        David Virag <virag.david003@...il.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] clk: samsung: exynos850: Enable PM support in clk-exynos850

Some CMUs in Exynos850 SoC belong to power domains. In order to support
"power-domains" property for such CMUs, use
exynos_arm64_register_cmu_pm() API instead of
exynos_arm64_register_cmu() in the probe function, and also provide PM
ops for suspend/resume accordingly.

Signed-off-by: Sam Protsenko <semen.protsenko@...aro.org>
---
 drivers/clk/samsung/clk-exynos850.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/clk/samsung/clk-exynos850.c b/drivers/clk/samsung/clk-exynos850.c
index 5664d17bae83..bbf0498dd0b0 100644
--- a/drivers/clk/samsung/clk-exynos850.c
+++ b/drivers/clk/samsung/clk-exynos850.c
@@ -9,8 +9,8 @@
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 
 #include <dt-bindings/clock/exynos850.h>
 
@@ -1909,13 +1909,7 @@ static const struct samsung_cmu_info dpu_cmu_info __initconst = {
 
 static int __init exynos850_cmu_probe(struct platform_device *pdev)
 {
-	const struct samsung_cmu_info *info;
-	struct device *dev = &pdev->dev;
-
-	info = of_device_get_match_data(dev);
-	exynos_arm64_register_cmu(dev, dev->of_node, info);
-
-	return 0;
+	return exynos_arm64_register_cmu_pm(pdev, true);
 }
 
 static const struct of_device_id exynos850_cmu_of_match[] = {
@@ -1950,11 +1944,19 @@ static const struct of_device_id exynos850_cmu_of_match[] = {
 	},
 };
 
+static const struct dev_pm_ops exynos850_cmu_pm_ops = {
+	SET_RUNTIME_PM_OPS(exynos_arm64_cmu_suspend, exynos_arm64_cmu_resume,
+			   NULL)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				      pm_runtime_force_resume)
+};
+
 static struct platform_driver exynos850_cmu_driver __refdata = {
 	.driver	= {
 		.name = "exynos850-cmu",
 		.of_match_table = exynos850_cmu_of_match,
 		.suppress_bind_attrs = true,
+		.pm = &exynos850_cmu_pm_ops,
 	},
 	.probe = exynos850_cmu_probe,
 };
-- 
2.39.2