OpenWrt – Blame information for rev 3
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Rev | Author | Line No. | Line |
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1 | office | 1 | From 4533c285c2aedce6d4434d7b877066de3b1ecb33 Mon Sep 17 00:00:00 2001 |
2 | From: Georgi Djakov <georgi.djakov@linaro.org> |
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3 | Date: Thu, 25 Aug 2016 18:43:35 +0300 |
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4 | Subject: [PATCH 52/69] PM / OPP: Update the voltage tolerance when adjusting |
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5 | the OPP |
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6 | |||
7 | When the voltage is adjusted, the voltage tolerance is not updated. |
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8 | This can lead to situations where the voltage min value is greater |
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9 | than the voltage max value. The final result is triggering a BUG() |
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10 | in the regulator core. |
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11 | Fix this by updating the voltage tolerance values too. |
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12 | |||
13 | Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org> |
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14 | --- |
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15 | drivers/base/power/opp/core.c | 5 +++++ |
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16 | 1 file changed, 5 insertions(+) |
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17 | |||
18 | --- a/drivers/base/power/opp/core.c |
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19 | +++ b/drivers/base/power/opp/core.c |
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3 | office | 20 | @@ -1649,6 +1649,7 @@ int dev_pm_opp_adjust_voltage(struct dev |
1 | office | 21 | struct opp_table *opp_table; |
22 | struct dev_pm_opp *new_opp, *tmp_opp, *opp = ERR_PTR(-ENODEV); |
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23 | int r = 0; |
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24 | + unsigned long tol; |
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25 | |||
26 | /* keep the node allocated */ |
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27 | new_opp = kmalloc(sizeof(*new_opp), GFP_KERNEL); |
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3 | office | 28 | @@ -1685,6 +1686,10 @@ int dev_pm_opp_adjust_voltage(struct dev |
1 | office | 29 | |
30 | /* plug in new node */ |
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31 | new_opp->supplies[0].u_volt = u_volt; |
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32 | + tol = u_volt * opp_table->voltage_tolerance_v1 / 100; |
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33 | + new_opp->supplies[0].u_volt = u_volt; |
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34 | + new_opp->supplies[0].u_volt_min = u_volt - tol; |
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35 | + new_opp->supplies[0].u_volt_max = u_volt + tol; |
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36 | |||
37 | list_replace(&opp->node, &new_opp->node); |
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38 | mutex_unlock(&opp_table_lock); |