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Date: Sat, 20 Apr 2013 20:12:52 +0800 From: Axel Lin <axel.lin@...ics.com> To: Mark Brown <broonie@...nsource.wolfsonmicro.com> Cc: Laxman Dewangan <ldewangan@...dia.com>, Graeme Gregory <gg@...mlogic.co.uk>, Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org Subject: [RFC/RFT][PATCH] regulator: palmas: Convert to use regulator_set_voltage_time_sel() Use regulator_set_voltage_time_sel() instead of open coded. If rdev->constraints->ramp_delay is specified, the setting will be used in regulator_set_voltage_time_sel(). And then pmic->ramp_delay[] is not used and can be removed. There is a different behavior change here: regulator_set_voltage_time_sel() always returns DIV_ROUND_UP(abs(new_volt - old_volt), ramp_delay); palma_smps_set_voltage_smps_time_sel() actually returns DIV_ROUND_UP(abs(new_volt - old_volt), modified_ramp_delay); where the modified_ramp_delay is not exactly specified by rdev->constraints->ramp_delay but a value from pmic->ramp_delay[id]. So palma_smps_set_voltage_smps_time_sel() may return a smaller delay than regulator_set_voltage_time_sel() depend on rdev->constraints->ramp_delay value. I think the delay in both version are *safe* for the operation. Signed-off-by: Axel Lin <axel.lin@...ics.com> --- drivers/regulator/palmas-regulator.c | 26 +------------------------- include/linux/mfd/palmas.h | 1 - 2 files changed, 1 insertion(+), 26 deletions(-) diff --git a/drivers/regulator/palmas-regulator.c b/drivers/regulator/palmas-regulator.c index 9254f94..3d9437e 100644 --- a/drivers/regulator/palmas-regulator.c +++ b/drivers/regulator/palmas-regulator.c @@ -408,28 +408,6 @@ static int palmas_map_voltage_smps(struct regulator_dev *rdev, return ret; } -static int palma_smps_set_voltage_smps_time_sel(struct regulator_dev *rdev, - unsigned int old_selector, unsigned int new_selector) -{ - struct palmas_pmic *pmic = rdev_get_drvdata(rdev); - int id = rdev_get_id(rdev); - int old_uv, new_uv; - unsigned int ramp_delay = pmic->ramp_delay[id]; - - if (!ramp_delay) - return 0; - - old_uv = palmas_list_voltage_smps(rdev, old_selector); - if (old_uv < 0) - return old_uv; - - new_uv = palmas_list_voltage_smps(rdev, new_selector); - if (new_uv < 0) - return new_uv; - - return DIV_ROUND_UP(abs(old_uv - new_uv), ramp_delay); -} - static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { @@ -454,7 +432,6 @@ static int palmas_smps_set_ramp_delay(struct regulator_dev *rdev, return ret; } - pmic->ramp_delay[id] = palmas_smps_ramp_delay[reg]; return ret; } @@ -468,7 +445,7 @@ static struct regulator_ops palmas_ops_smps = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = palmas_list_voltage_smps, .map_voltage = palmas_map_voltage_smps, - .set_voltage_time_sel = palma_smps_set_voltage_smps_time_sel, + .set_voltage_time_sel = regulator_set_voltage_time_sel, .set_ramp_delay = palmas_smps_set_ramp_delay, }; @@ -846,7 +823,6 @@ static int palmas_regulators_probe(struct platform_device *pdev) } pmic->desc[id].ramp_delay = palmas_smps_ramp_delay[reg & 0x3]; - pmic->ramp_delay[id] = pmic->desc[id].ramp_delay; } /* Initialise sleep/init values from platform data */ diff --git a/include/linux/mfd/palmas.h b/include/linux/mfd/palmas.h index 8f21daf..c288118 100644 --- a/include/linux/mfd/palmas.h +++ b/include/linux/mfd/palmas.h @@ -337,7 +337,6 @@ struct palmas_pmic { int smps457; int range[PALMAS_REG_SMPS10]; - unsigned int ramp_delay[PALMAS_REG_SMPS10]; unsigned int current_reg_mode[PALMAS_REG_SMPS10]; }; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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