From 0178f3e28e2166664916265c5d4922b1376b9fa1 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 26 Apr 2010 15:18:14 +0100 Subject: [PATCH] regulator: Allow regulator-regulator supplies to be specified by name When one regulator supplies another allow the relationship to be specified using names rather than struct regulators, in a similar manner to that allowed for consumer supplies. This allows static configuration at compile time, reducing the need for dynamic init code. Also change the references to LINE supply to be system supply since line is sometimes used for actual supplies and therefore potentially confusing. Signed-off-by: Mark Brown Signed-off-by: Liam Girdwood --- drivers/regulator/core.c | 30 ++++++++++++++++++++++++++++++ include/linux/regulator/machine.h | 9 +++++++-- 2 files changed, 37 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 51cf2bb37438..eb112d961515 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -2328,7 +2328,37 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, goto scrub; /* set supply regulator if it exists */ + if (init_data->supply_regulator && init_data->supply_regulator_dev) { + dev_err(dev, + "Supply regulator specified by both name and dev\n"); + goto scrub; + } + + if (init_data->supply_regulator) { + struct regulator_dev *r; + int found = 0; + + list_for_each_entry(r, ®ulator_list, list) { + if (strcmp(rdev_get_name(r), + init_data->supply_regulator) == 0) { + found = 1; + break; + } + } + + if (!found) { + dev_err(dev, "Failed to find supply %s\n", + init_data->supply_regulator); + goto scrub; + } + + ret = set_supply(rdev, r); + if (ret < 0) + goto scrub; + } + if (init_data->supply_regulator_dev) { + dev_warn(dev, "Uses supply_regulator_dev instead of regulator_supply\n"); ret = set_supply(rdev, dev_get_drvdata(init_data->supply_regulator_dev)); if (ret < 0) diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h index 234a8476cba8..e2980287245e 100644 --- a/include/linux/regulator/machine.h +++ b/include/linux/regulator/machine.h @@ -157,7 +157,11 @@ struct regulator_consumer_supply { * * Initialisation constraints, our supply and consumers supplies. * - * @supply_regulator_dev: Parent regulator (if any). + * @supply_regulator: Parent regulator. Specified using the regulator name + * as it appears in the name field in sysfs, which can + * be explicitly set using the constraints field 'name'. + * @supply_regulator_dev: Parent regulator (if any) - DEPRECATED in favour + * of supply_regulator. * * @constraints: Constraints. These must be specified for the regulator to * be usable. @@ -168,7 +172,8 @@ struct regulator_consumer_supply { * @driver_data: Data passed to regulator_init. */ struct regulator_init_data { - struct device *supply_regulator_dev; /* or NULL for LINE */ + const char *supply_regulator; /* or NULL for system supply */ + struct device *supply_regulator_dev; /* or NULL for system supply */ struct regulation_constraints constraints; -- 2.20.1