diff options
Diffstat (limited to 'target/linux/ipq806x/patches-5.4/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch')
| -rw-r--r-- | target/linux/ipq806x/patches-5.4/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/ipq806x/patches-5.4/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch b/target/linux/ipq806x/patches-5.4/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch new file mode 100644 index 0000000000..8ba2369ddd --- /dev/null +++ b/target/linux/ipq806x/patches-5.4/0052-PM-OPP-Update-the-voltage-tolerance-when-adjusting-t.patch @@ -0,0 +1,47 @@ +From 4533c285c2aedce6d4434d7b877066de3b1ecb33 Mon Sep 17 00:00:00 2001 +From: Georgi Djakov <georgi.djakov@linaro.org> +Date: Thu, 25 Aug 2016 18:43:35 +0300 +Subject: [PATCH 52/69] PM / OPP: Update the voltage tolerance when adjusting + the OPP + +When the voltage is adjusted, the voltage tolerance is not updated. +This can lead to situations where the voltage min value is greater +than the voltage max value. The final result is triggering a BUG() +in the regulator core. +Fix this by updating the voltage tolerance values too. + +Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> +--- + drivers/opp/core.c | 5 +++++ + 1 file changed, 5 insertions(+) + +--- a/drivers/opp/core.c ++++ b/drivers/opp/core.c +@@ -1663,6 +1663,7 @@ int dev_pm_opp_adjust_voltage(struct dev + struct opp_table *opp_table; + struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); + int r = 0; ++ unsigned long tol; + + /* Find the opp_table */ + opp_table = _find_opp_table(dev); +@@ -1692,8 +1693,17 @@ int dev_pm_opp_adjust_voltage(struct dev + goto adjust_unlock; + + opp->supplies->u_volt = u_volt; +- opp->supplies->u_volt_min = u_volt_min; +- opp->supplies->u_volt_max = u_volt_max; ++ ++ tol = u_volt * opp_table->voltage_tolerance_v1 / 100; ++ if ( u_volt_min == u_volt ) ++ opp->supplies->u_volt_min = u_volt - tol; ++ else ++ opp->supplies->u_volt_min = u_volt_min; ++ ++ if ( u_volt_max == u_volt ) ++ opp->supplies->u_volt_max = u_volt + tol; ++ else ++ opp->supplies->u_volt_max = u_volt_max; + + dev_pm_opp_get(opp); + mutex_unlock(&opp_table->lock); |