From patchwork Wed Mar 11 12:21:39 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Brownell X-Patchwork-Id: 11118 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n2BCWqGg024749 for ; Wed, 11 Mar 2009 12:32:52 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753140AbZCKMcu (ORCPT ); Wed, 11 Mar 2009 08:32:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752371AbZCKMcu (ORCPT ); Wed, 11 Mar 2009 08:32:50 -0400 Received: from smtp120.sbc.mail.sp1.yahoo.com ([69.147.64.93]:44243 "HELO smtp120.sbc.mail.sp1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1752020AbZCKMct (ORCPT ); Wed, 11 Mar 2009 08:32:49 -0400 Received: (qmail 93378 invoked from network); 11 Mar 2009 12:32:47 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=pacbell.net; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:From:To:Subject:Date:User-Agent:References:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id; b=15OsE1O6oEx9qO0U0U4E0WuW48T0fcSMXqslKKe2QHoZ6WUVGl72lMabsTOZXTcNjH/AjaGKguBx/+zZv+E85u7uYhT9BBt8POhKhvmDiNchjxUGyulAvBIkZx2enCpnOE3dn2zOepSLpZPtOh3XNnVJs1NkJRYEtU6w99rNA/8= ; Received: from unknown (HELO pogo) (david-b@69.226.224.20 with plain) by smtp120.sbc.mail.sp1.yahoo.com with SMTP; 11 Mar 2009 12:32:47 -0000 X-YMail-OSG: 972oYLcVM1lPs3bfqOZMu5y9xccNgbbAptLHcz37_qnmlbQTmiUeVLJhqKtPwrbBaHuULbjPnQQtmtgByOv79fiX9AuEam2IjhAcYt_qqLBSSZhB8gRKyyE6U0I_JJoT8iipCl0HYXU2F5a_NQTBWqWQ6FFNlTURaWmYYnv05z.FMpFLGkT411cXYTJsYu6CrV5CjfUHnpHtK5DelXoLBaAwP9wD4KSOKkchdg-- X-Yahoo-Newman-Property: ymail-3 From: David Brownell To: OMAP Subject: [patch 2.6.29-rc7-omap 2/5] regulator: twl4030 voltage enumeration Date: Wed, 11 Mar 2009 04:21:39 -0800 User-Agent: KMail/1.9.10 References: <200903110518.34945.david-b@pacbell.net> In-Reply-To: <200903110518.34945.david-b@pacbell.net> MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200903110521.39984.david-b@pacbell.net> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org From: David Brownell Subject: 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 --- drivers/regulator/twl4030-regulator.c | 62 +++++++++++--------------------- 1 file changed, 23 insertions(+), 39 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --- 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_ 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 } 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_o /* * 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(stru } 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 .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 .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 platf 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 platf * 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 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);