* [PATCH] regulator: ab8500: Provide map_voltage() functions
@ 2013-07-03 9:16 Mark Brown
2013-07-21 14:45 ` Linus Walleij
0 siblings, 1 reply; 4+ messages in thread
From: Mark Brown @ 2013-07-03 9:16 UTC (permalink / raw)
To: Liam Girdwood, Lee Jones, Bengt Jonsson
Cc: linux-kernel, linaro-kernel, Mark Brown
From: Mark Brown <broonie@linaro.org>
Since all the voltage tables for ab8500 are sorted in ascending order we
can improve performance by using regulator_map_voltage_ascend(). A couple
of the regulators can actually use linear maps which would be even better.
Signed-off-by: Mark Brown <broonie@linaro.org>
---
drivers/regulator/ab8500.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 603f192..43cb354 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -651,6 +651,7 @@ static struct regulator_ops ab8500_regulator_volt_mode_ops = {
.get_voltage_sel = ab8500_regulator_get_voltage_sel,
.set_voltage_sel = ab8500_regulator_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops ab8540_aux3_regulator_volt_mode_ops = {
@@ -663,6 +664,7 @@ static struct regulator_ops ab8540_aux3_regulator_volt_mode_ops = {
.get_voltage_sel = ab8540_aux3_regulator_get_voltage_sel,
.set_voltage_sel = ab8540_aux3_regulator_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops ab8500_regulator_volt_ops = {
@@ -672,6 +674,7 @@ static struct regulator_ops ab8500_regulator_volt_ops = {
.get_voltage_sel = ab8500_regulator_get_voltage_sel,
.set_voltage_sel = ab8500_regulator_set_voltage_sel,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops ab8500_regulator_mode_ops = {
@@ -682,6 +685,7 @@ static struct regulator_ops ab8500_regulator_mode_ops = {
.set_mode = ab8500_regulator_set_mode,
.get_mode = ab8500_regulator_get_mode,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops ab8500_regulator_ops = {
@@ -689,6 +693,7 @@ static struct regulator_ops ab8500_regulator_ops = {
.disable = ab8500_regulator_disable,
.is_enabled = ab8500_regulator_is_enabled,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
static struct regulator_ops ab8500_regulator_anamic_mode_ops = {
@@ -698,6 +703,7 @@ static struct regulator_ops ab8500_regulator_anamic_mode_ops = {
.set_mode = ab8500_regulator_set_mode,
.get_mode = ab8500_regulator_get_mode,
.list_voltage = regulator_list_voltage_table,
+ .map_voltage = regulator_map_voltage_ascend,
};
/* AB8500 regulator information */
--
1.8.3.1
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] regulator: ab8500: Provide map_voltage() functions
2013-07-03 9:16 [PATCH] regulator: ab8500: Provide map_voltage() functions Mark Brown
@ 2013-07-21 14:45 ` Linus Walleij
2013-07-21 23:34 ` Mark Brown
0 siblings, 1 reply; 4+ messages in thread
From: Linus Walleij @ 2013-07-21 14:45 UTC (permalink / raw)
To: Mark Brown
Cc: Liam Girdwood, Lee Jones, Bengt Jonsson, linaro-kernel,
linux-kernel, Mark Brown
On Wed, Jul 3, 2013 at 11:16 AM, Mark Brown <broonie@kernel.org> wrote:
> From: Mark Brown <broonie@linaro.org>
>
> Since all the voltage tables for ab8500 are sorted in ascending order we
> can improve performance by using regulator_map_voltage_ascend(). A couple
> of the regulators can actually use linear maps which would be even better.
>
> Signed-off-by: Mark Brown <broonie@linaro.org>
Hm. Have you looked closer at this one voltage table in this driver:
static const unsigned int ldo_vaux56_voltages[] = {
1800000,
1050000,
1100000,
1200000,
1500000,
2200000,
2500000,
2790000,
};
Or this one:
static const unsigned int ldo_sdio_voltages[] = {
1160000,
1050000,
1100000,
1500000,
1800000,
2200000,
2910000,
3050000,
};
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] regulator: ab8500: Provide map_voltage() functions
2013-07-21 14:45 ` Linus Walleij
@ 2013-07-21 23:34 ` Mark Brown
2013-07-22 23:18 ` Linus Walleij
0 siblings, 1 reply; 4+ messages in thread
From: Mark Brown @ 2013-07-21 23:34 UTC (permalink / raw)
To: Linus Walleij
Cc: Liam Girdwood, Lee Jones, Bengt Jonsson, linaro-kernel, linux-kernel
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On Sun, Jul 21, 2013 at 04:45:23PM +0200, Linus Walleij wrote:
> Hm. Have you looked closer at this one voltage table in this driver:
> static const unsigned int ldo_vaux56_voltages[] = {
> 1800000,
> 1050000,
Meh, that's annoying - 8 looks too close to zero and it's the first time
I've ever seen non-ascending hardware :/
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] regulator: ab8500: Provide map_voltage() functions
2013-07-21 23:34 ` Mark Brown
@ 2013-07-22 23:18 ` Linus Walleij
0 siblings, 0 replies; 4+ messages in thread
From: Linus Walleij @ 2013-07-22 23:18 UTC (permalink / raw)
To: Mark Brown
Cc: Liam Girdwood, Lee Jones, Bengt Jonsson, linaro-kernel, linux-kernel
On Mon, Jul 22, 2013 at 1:34 AM, Mark Brown <broonie@kernel.org> wrote:
> On Sun, Jul 21, 2013 at 04:45:23PM +0200, Linus Walleij wrote:
>
>> Hm. Have you looked closer at this one voltage table in this driver:
>
>> static const unsigned int ldo_vaux56_voltages[] = {
>> 1800000,
>> 1050000,
>
> Meh, that's annoying - 8 looks too close to zero and it's the first time
> I've ever seen non-ascending hardware :/
Yeah it totally kills my obsessive-compulsive side ...
but it seems the HW engineer didn't care :-(
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 4+ messages in thread
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2013-07-03 9:16 [PATCH] regulator: ab8500: Provide map_voltage() functions Mark Brown
2013-07-21 14:45 ` Linus Walleij
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2013-07-22 23:18 ` Linus Walleij
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