e6b5be2be4
Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEABECAAYFAlSOD20ACgkQMUfUDdst+ylLPACg2QrW1oHhdTMT9WI8jihlHVRM 53kAoLeteByQ3iVwWurwwseRPiWa8+MI =OVRS -----END PGP SIGNATURE----- Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev_<level>_once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...
121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Copyright (C) 2012 ARM Limited
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*/
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#define DRVNAME "vexpress-regulator"
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#define pr_fmt(fmt) DRVNAME ": " fmt
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/vexpress.h>
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struct vexpress_regulator {
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struct regulator_desc desc;
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struct regulator_dev *regdev;
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struct regmap *regmap;
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};
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static int vexpress_regulator_get_voltage(struct regulator_dev *regdev)
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{
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struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
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u32 uV;
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int err = regmap_read(reg->regmap, 0, &uV);
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return err ? err : uV;
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}
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static int vexpress_regulator_set_voltage(struct regulator_dev *regdev,
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int min_uV, int max_uV, unsigned *selector)
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{
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struct vexpress_regulator *reg = rdev_get_drvdata(regdev);
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return regmap_write(reg->regmap, 0, min_uV);
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}
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static struct regulator_ops vexpress_regulator_ops_ro = {
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.get_voltage = vexpress_regulator_get_voltage,
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};
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static struct regulator_ops vexpress_regulator_ops = {
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.get_voltage = vexpress_regulator_get_voltage,
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.set_voltage = vexpress_regulator_set_voltage,
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};
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static int vexpress_regulator_probe(struct platform_device *pdev)
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{
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struct vexpress_regulator *reg;
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struct regulator_init_data *init_data;
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struct regulator_config config = { };
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reg = devm_kzalloc(&pdev->dev, sizeof(*reg), GFP_KERNEL);
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if (!reg)
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return -ENOMEM;
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reg->regmap = devm_regmap_init_vexpress_config(&pdev->dev);
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if (IS_ERR(reg->regmap))
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return PTR_ERR(reg->regmap);
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reg->desc.name = dev_name(&pdev->dev);
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reg->desc.type = REGULATOR_VOLTAGE;
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reg->desc.owner = THIS_MODULE;
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reg->desc.continuous_voltage_range = true;
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init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
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®->desc);
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if (!init_data)
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return -EINVAL;
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init_data->constraints.apply_uV = 0;
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if (init_data->constraints.min_uV && init_data->constraints.max_uV)
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reg->desc.ops = &vexpress_regulator_ops;
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else
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reg->desc.ops = &vexpress_regulator_ops_ro;
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config.dev = &pdev->dev;
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config.init_data = init_data;
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config.driver_data = reg;
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config.of_node = pdev->dev.of_node;
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reg->regdev = devm_regulator_register(&pdev->dev, ®->desc, &config);
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if (IS_ERR(reg->regdev))
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return PTR_ERR(reg->regdev);
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platform_set_drvdata(pdev, reg);
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return 0;
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}
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static const struct of_device_id vexpress_regulator_of_match[] = {
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{ .compatible = "arm,vexpress-volt", },
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{ }
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};
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static struct platform_driver vexpress_regulator_driver = {
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.probe = vexpress_regulator_probe,
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.driver = {
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.name = DRVNAME,
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.of_match_table = vexpress_regulator_of_match,
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},
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};
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module_platform_driver(vexpress_regulator_driver);
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MODULE_AUTHOR("Pawel Moll <pawel.moll@arm.com>");
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MODULE_DESCRIPTION("Versatile Express regulator");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:vexpress-regulator");
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