From 8b0f9499b13e61e3bd730f2f10d2cf20c693e36d Mon Sep 17 00:00:00 2001 From: David Brownell Date: Wed, 11 Mar 2009 12:21:39 +0000 Subject: [PATCH] regulator: twl4030 voltage enumeration (v2) Update previously-posted twl4030 regulator driver to export supported voltages to upper layers using a new mechanism. Signed-off-by: David Brownell Acked-by: Mark Brown Signed-off-by: Liam Girdwood Signed-off-by: Tony Lindgren --- drivers/regulator/twl4030-regulator.c | 62 ++++++++++----------------- 1 file changed, 23 insertions(+), 39 deletions(-) diff --git a/drivers/regulator/twl4030-regulator.c b/drivers/regulator/twl4030-regulator.c index 269f4b96663..5b265e05e56 100644 --- a/drivers/regulator/twl4030-regulator.c +++ b/drivers/regulator/twl4030-regulator.c @@ -42,7 +42,6 @@ struct twlreg_info { /* chip constraints on regulator behavior */ u16 min_mV; - u16 max_mV; /* used by regulator core */ struct regulator_desc desc; @@ -262,6 +261,14 @@ static const u16 VDAC_VSEL_table[] = { }; +static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) +{ + struct twlreg_info *info = rdev_get_drvdata(rdev); + int mV = info->table[index]; + + return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000); +} + static int twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) { @@ -276,6 +283,8 @@ twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV) continue; uV = LDO_MV(mV) * 1000; + /* REVISIT for VAUX2, first match may not be best/lowest */ + /* use the first in-range value */ if (min_uV <= uV && uV <= max_uV) return twl4030reg_write(info, VREG_DEDICATED, vsel); @@ -297,6 +306,8 @@ static int twl4030ldo_get_voltage(struct regulator_dev *rdev) } static struct regulator_ops twl4030ldo_ops = { + .list_voltage = twl4030ldo_list_voltage, + .set_voltage = twl4030ldo_set_voltage, .get_voltage = twl4030ldo_get_voltage, @@ -314,6 +325,13 @@ static struct regulator_ops twl4030ldo_ops = { /* * Fixed voltage LDOs don't have a VSEL field to update. */ +static int twl4030fixed_list_voltage(struct regulator_dev *rdev, unsigned index) +{ + struct twlreg_info *info = rdev_get_drvdata(rdev); + + return info->min_mV * 1000; +} + static int twl4030fixed_get_voltage(struct regulator_dev *rdev) { struct twlreg_info *info = rdev_get_drvdata(rdev); @@ -322,6 +340,8 @@ static int twl4030fixed_get_voltage(struct regulator_dev *rdev) } static struct regulator_ops twl4030fixed_ops = { + .list_voltage = twl4030fixed_list_voltage, + .get_voltage = twl4030fixed_get_voltage, .enable = twl4030reg_enable, @@ -343,6 +363,7 @@ static struct regulator_ops twl4030fixed_ops = { .desc = { \ .name = #label, \ .id = TWL4030_REG_##label, \ + .n_voltages = ARRAY_SIZE(label##_VSEL_table), \ .ops = &twl4030ldo_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ @@ -353,10 +374,10 @@ static struct regulator_ops twl4030fixed_ops = { .base = offset, \ .id = num, \ .min_mV = mVolts, \ - .max_mV = mVolts, \ .desc = { \ .name = #label, \ .id = TWL4030_REG_##label, \ + .n_voltages = 1, \ .ops = &twl4030fixed_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ @@ -402,14 +423,11 @@ static int twl4030reg_probe(struct platform_device *pdev) struct regulator_init_data *initdata; struct regulation_constraints *c; struct regulator_dev *rdev; - int min_uV, max_uV; for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) { if (twl4030_regs[i].desc.id != pdev->id) continue; info = twl4030_regs + i; - min_uV = info->min_mV * 1000; - max_uV = info->max_mV * 1000; break; } if (!info) @@ -423,10 +441,6 @@ static int twl4030reg_probe(struct platform_device *pdev) * this driver and the chip itself can actually do. */ c = &initdata->constraints; - if (!c->min_uV || c->min_uV < min_uV) - c->min_uV = min_uV; - if (!c->max_uV || c->max_uV > max_uV) - c->max_uV = max_uV; c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY; c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_MODE @@ -471,36 +485,6 @@ static struct platform_driver twl4030reg_driver = { static int __init twl4030reg_init(void) { - unsigned i, j; - - /* determine min/max voltage constraints, taking into account - * whether set_voltage() will use the "unsupported" settings - */ - for (i = 0; i < ARRAY_SIZE(twl4030_regs); i++) { - struct twlreg_info *info = twl4030_regs + i; - const u16 *table; - - /* fixed-voltage regulators */ - if (!info->table_len) - continue; - - /* LDO regulators: */ - for (j = 0, table = info->table; - j < info->table_len; - j++, table++) { - u16 mV = *table; - - if (IS_UNSUP(mV)) - continue; - mV = LDO_MV(mV); - - if (info->min_mV == 0 || info->min_mV > mV) - info->min_mV = mV; - if (info->max_mV < mV) - info->max_mV = mV; - } - } - return platform_driver_register(&twl4030reg_driver); } subsys_initcall(twl4030reg_init); -- 2.41.0