diff mbox series

[V3,08/20] soc/tegra: Add comment over devm_pm_opp_set_clkname()

Message ID 2f93b66f785b91c720aacd3cdb152fbf1e375141.1656935522.git.viresh.kumar@linaro.org (mailing list archive)
State New, archived
Delegated to: viresh kumar
Headers show
Series OPP: Add new configuration interface: dev_pm_opp_set_config() | expand

Commit Message

Viresh Kumar July 4, 2022, 12:07 p.m. UTC 
Explain why special handling was required here, it isn't obvious at all.

Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/soc/tegra/common.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/soc/tegra/common.c b/drivers/soc/tegra/common.c
index 32c346b72635..9f3fdeb1a11c 100644
--- a/drivers/soc/tegra/common.c
+++ b/drivers/soc/tegra/common.c
@@ -108,6 +108,13 @@  int devm_tegra_core_dev_init_opp_table(struct device *dev,
 	u32 hw_version;
 	int err;
 
+	/*
+	 * For some devices we don't have any OPP table in the DT, and in order
+	 * to use the same code path for all the devices, we create a dummy OPP
+	 * table for them via this call. The dummy OPP table is only capable of
+	 * doing clk_set_rate() on invocation of dev_pm_opp_set_rate() and
+	 * doesn't provide any other functionality.
+	 */
 	err = devm_pm_opp_set_clkname(dev, NULL);
 	if (err) {
 		dev_err(dev, "failed to set OPP clk: %d\n", err);