[PATCH v13 02/35] soc/tegra: Add devm_tegra_core_dev_init_opp_table_common()

[Dmitry Osipenko]

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 at gmail.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