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Subject[PATCH V3 02/16] PM / OPP: Disable OPPs that aren't supported by the regulator
Date
Disable any OPPs where the connected regulator isn't able to provide the
specified voltage.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/base/power/opp/core.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index 1e22b71abf1e..71545becfca1 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -687,6 +687,22 @@ static struct dev_pm_opp *_allocate_opp(struct device *dev,
return opp;
}

+static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
+ struct device_opp *dev_opp)
+{
+ struct regulator *reg = dev_opp->regulator;
+
+ if (!IS_ERR(reg) &&
+ !regulator_is_supported_voltage(reg, opp->u_volt_min,
+ opp->u_volt_max)) {
+ pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
+ __func__, opp->u_volt_min, opp->u_volt_max);
+ return false;
+ }
+
+ return true;
+}
+
static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
struct device_opp *dev_opp)
{
@@ -728,6 +744,12 @@ static int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,
dev_err(dev, "%s: Failed to register opp to debugfs (%d)\n",
__func__, ret);

+ if (!_opp_supported_by_regulators(new_opp, dev_opp)) {
+ new_opp->available = false;
+ dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n",
+ __func__, new_opp->rate);
+ }
+
return 0;
}

--
2.7.1.370.gb2aa7f8
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