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authorMatthias Kaehlcke <mka@chromium.org>2016-09-14 19:52:08 +0300
committerMark Brown <broonie@kernel.org>2016-09-16 20:38:22 +0300
commit73e705bf81ceb84b39ef9cf6ffb8d12ca0c58a23 (patch)
treed9b12334afd63697d21e46788c7a79c80abd0da7 /drivers/regulator/pwm-regulator.c
parentd89564efe79419a093e966a959bf5ba2c94e693f (diff)
downloadlinux-73e705bf81ceb84b39ef9cf6ffb8d12ca0c58a23.tar.xz
regulator: core: Add set_voltage_time op
The new op is analogous to set_voltage_time_sel. It can be used by regulators which don't have a table of discrete voltages. The function returns the time for the regulator output voltage to stabilize after being set to a new value, in microseconds. If the op is not set a default implementation is used to calculate the delay. This change also removes the ramp_delay calculation in the PWM regulator, since the driver now uses the core code for the calculation of the delay. Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/pwm-regulator.c')
-rw-r--r--drivers/regulator/pwm-regulator.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index c24524242da2..1b88e0e15a70 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -10,7 +10,6 @@
* published by the Free Software Foundation.
*/
-#include <linux/delay.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
@@ -194,12 +193,10 @@ static int pwm_regulator_set_voltage(struct regulator_dev *rdev,
unsigned int min_uV_duty = drvdata->continuous.min_uV_dutycycle;
unsigned int max_uV_duty = drvdata->continuous.max_uV_dutycycle;
unsigned int duty_unit = drvdata->continuous.dutycycle_unit;
- unsigned int ramp_delay = rdev->constraints->ramp_delay;
int min_uV = rdev->constraints->min_uV;
int max_uV = rdev->constraints->max_uV;
int diff_uV = max_uV - min_uV;
struct pwm_state pstate;
- int old_uV = pwm_regulator_get_voltage(rdev);
unsigned int diff_duty;
unsigned int dutycycle;
int ret;
@@ -233,13 +230,6 @@ static int pwm_regulator_set_voltage(struct regulator_dev *rdev,
return ret;
}
- if ((ramp_delay == 0) || !pwm_regulator_is_enabled(rdev))
- return 0;
-
- /* Ramp delay is in uV/uS. Adjust to uS and delay */
- ramp_delay = DIV_ROUND_UP(abs(req_min_uV - old_uV), ramp_delay);
- usleep_range(ramp_delay, ramp_delay + DIV_ROUND_UP(ramp_delay, 10));
-
return 0;
}