diff options
Diffstat (limited to 'drivers/base/power/domain.c')
| -rw-r--r-- | drivers/base/power/domain.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index f10688e83226..5db704f02e71 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2604,6 +2604,12 @@ static void genpd_dev_pm_detach(struct device *dev, bool power_off) dev_dbg(dev, "removing from PM domain %s\n", pd->name); + /* Drop the default performance state */ + if (dev_gpd_data(dev)->default_pstate) { + dev_pm_genpd_set_performance_state(dev, 0); + dev_gpd_data(dev)->default_pstate = 0; + } + for (i = 1; i < GENPD_RETRY_MAX_MS; i <<= 1) { ret = genpd_remove_device(pd, dev); if (ret != -EAGAIN) @@ -2643,6 +2649,7 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, { struct of_phandle_args pd_args; struct generic_pm_domain *pd; + int pstate; int ret; ret = of_parse_phandle_with_args(dev->of_node, "power-domains", @@ -2681,10 +2688,29 @@ static int __genpd_dev_pm_attach(struct device *dev, struct device *base_dev, genpd_unlock(pd); } - if (ret) + if (ret) { genpd_remove_device(pd, dev); + return -EPROBE_DEFER; + } - return ret ? -EPROBE_DEFER : 1; + /* Set the default performance state */ + pstate = of_get_required_opp_performance_state(dev->of_node, index); + if (pstate < 0 && pstate != -ENODEV && pstate != -EOPNOTSUPP) { + ret = pstate; + goto err; + } else if (pstate > 0) { + ret = dev_pm_genpd_set_performance_state(dev, pstate); + if (ret) + goto err; + dev_gpd_data(dev)->default_pstate = pstate; + } + return 1; + +err: + dev_err(dev, "failed to set required performance state for power-domain %s: %d\n", + pd->name, ret); + genpd_remove_device(pd, dev); + return ret; } /** |