This is a note to let you know that I've just added the patch titled
regulator: max8998: Ensure enough delay time for max8998_set_voltage_buck_time_sel
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
regulator-max8998-ensure-enough-delay-time-for-max8998_set_voltage_buck_time_sel.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e8d9897ff064b1683c11c15ea1296a67a45d77b0 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@xxxxxxxxxx>
Date: Wed, 9 Jan 2013 19:34:57 +0800
Subject: regulator: max8998: Ensure enough delay time for max8998_set_voltage_buck_time_sel
From: Axel Lin <axel.lin@xxxxxxxxxx>
commit e8d9897ff064b1683c11c15ea1296a67a45d77b0 upstream.
commit 81d0a6ae7befb24c06f4aa4856af7f8d1f612171 upstream.
Use DIV_ROUND_UP to prevent truncation by integer division issue.
This ensures we return enough delay time.
Signed-off-by: Axel Lin <axel.lin@xxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
[bwh: Backported to 3.2: delay is done by driver, not returned to the caller]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Qiang Huang <h.huangqiang@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/regulator/max8998.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/regulator/max8998.c
+++ b/drivers/regulator/max8998.c
@@ -492,7 +492,7 @@ buck2_exit:
difference = desc->min + desc->step*i - previous_vol/1000;
if (difference > 0)
- udelay(difference / ((val & 0x0f) + 1));
+ udelay(DIV_ROUND_UP(difference, (val & 0x0f) + 1));
return ret;
}
Patches currently in stable-queue which might be from axel.lin@xxxxxxxxxx are
queue-3.4/regulator-max8997-use-uv-in-voltage_map_desc.patch
queue-3.4/regulator-max8998-ensure-enough-delay-time-for-max8998_set_voltage_buck_time_sel.patch
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