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Merge branch 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm 

Merge an operating performance points (OPP) framework update for
5.7-rc2 from Viresh Kumar:

"This contains a single patch that lets the OPP core to be used by
 several IO drivers without making a lot of changes in them for the
 case where the same driver may be used by a platform with an OPP
 table or a clock node on another one. I am looking to get this into
 5.7 release itself, which will enable other users (in multiple
 frameworks) to get merged without waiting for the dependency to get
 resolved."

* 'opp/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  opp: Manage empty OPP tables with clk handle
This commit is contained in:
Rafael J. Wysocki 2020-04-14 23:13:53 +02:00
parent 8f3d9f3542 aca48b61f9
commit 2c127c46ec
1 changed files with 14 additions and 0 deletions
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14
drivers/opp/core.c
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@ -819,6 +819,8 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
if (unlikely(!target_freq)) {
if (opp_table->required_opp_tables) {
ret = _set_required_opps(dev, opp_table, NULL);
} else if (!_get_opp_count(opp_table)) {
return 0;
} else {
dev_err(dev, "target frequency can't be 0\n");
ret = -EINVAL;
@ -849,6 +851,18 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
goto put_opp_table;
}
/*
* For IO devices which require an OPP on some platforms/SoCs
* while just needing to scale the clock on some others
* we look for empty OPP tables with just a clock handle and
* scale only the clk. This makes dev_pm_opp_set_rate()
* equivalent to a clk_set_rate()
*/
if (!_get_opp_count(opp_table)) {
ret = _generic_set_opp_clk_only(dev, clk, freq);
goto put_opp_table;
}
temp_freq = old_freq;
old_opp = _find_freq_ceil(opp_table, &temp_freq);
if (IS_ERR(old_opp)) {