linux-kernel - [PATCH v13 02/35] soc/tegra: Add devm_tegra_core_dev_init_opp_table

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Date:   Mon, 27 Sep 2021 01:40:25 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Peter Chen <peter.chen@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Nishanth Menon <nm@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michael Turquette <mturquette@...libre.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        Mark Brown <broonie@...nel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Lucas Stach <dev@...xeye.de>, Stefan Agner <stefan@...er.ch>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        David Heidelberg <david@...t.cz>
Subject: [PATCH v13 02/35] soc/tegra: Add devm_tegra_core_dev_init_opp_table_common()

Only couple drivers need to get the -ENODEV error code and majority of
drivers need to explicitly initialize the performance state. Add new
common helper which sets up OPP table for these drivers.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 include/soc/tegra/common.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/soc/tegra/common.h b/include/soc/tegra/common.h
index af41ad80ec21..5b4a042f60fb 100644
--- a/include/soc/tegra/common.h
+++ b/include/soc/tegra/common.h
@@ -39,4 +39,28 @@ devm_tegra_core_dev_init_opp_table(struct device *dev,
 }
 #endif
 
+/*
+ * This function should be invoked with the enabled runtime PM of the device
+ * in order to initialize performance state properly. Most of Tegra devices
+ * are assumed to be suspended at a probe time and GENPD require RPM to be
+ * enabled to set up the rpm-resume state, otherwise device is active and
+ * performance state is applied immediately. Note that it will initialize
+ * OPP bandwidth if it's wired in a device-tree for this device, which is
+ * undesirable for a suspended device.
+ */
+static inline int
+devm_tegra_core_dev_init_opp_table_common(struct device *dev)
+{
+	struct tegra_core_opp_params opp_params = {};
+	int err;
+
+	opp_params.init_state = true;
+
+	err = devm_tegra_core_dev_init_opp_table(dev, &opp_params);
+	if (err != -ENODEV)
+		return err;
+
+	return 0;
+}
+
 #endif /* __SOC_TEGRA_COMMON_H__ */
-- 
2.32.0