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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 ...
280 lines
7.1 KiB
C
280 lines
7.1 KiB
C
/*
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* max77693.c - Regulator driver for the Maxim 77693
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*
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* Copyright (C) 2013 Samsung Electronics
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* Jonghwa Lee <jonghwa3.lee@samsung.com>
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*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This driver is based on max77686.c
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*/
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/export.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/mfd/max77693.h>
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#include <linux/mfd/max77693-private.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/regmap.h>
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#define CHGIN_ILIM_STEP_20mA 20000
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/* CHARGER regulator ops */
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/* CHARGER regulator uses two bits for enabling */
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static int max77693_chg_is_enabled(struct regulator_dev *rdev)
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{
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int ret;
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unsigned int val;
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ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
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if (ret)
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return ret;
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return (val & rdev->desc->enable_mask) == rdev->desc->enable_mask;
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}
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/*
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* CHARGER regulator - Min : 20mA, Max : 2580mA, step : 20mA
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* 0x00, 0x01, 0x2, 0x03 = 60 mA
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* 0x04 ~ 0x7E = (60 + (X - 3) * 20) mA
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*/
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static int max77693_chg_get_current_limit(struct regulator_dev *rdev)
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{
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unsigned int chg_min_uA = rdev->constraints->min_uA;
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unsigned int chg_max_uA = rdev->constraints->max_uA;
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unsigned int reg, sel;
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, MAX77693_CHG_REG_CHG_CNFG_09, ®);
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if (ret < 0)
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return ret;
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sel = reg & CHG_CNFG_09_CHGIN_ILIM_MASK;
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/* the first four codes for charger current are all 60mA */
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if (sel <= 3)
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sel = 0;
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else
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sel -= 3;
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val = chg_min_uA + CHGIN_ILIM_STEP_20mA * sel;
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if (val > chg_max_uA)
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return -EINVAL;
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return val;
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}
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static int max77693_chg_set_current_limit(struct regulator_dev *rdev,
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int min_uA, int max_uA)
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{
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unsigned int chg_min_uA = rdev->constraints->min_uA;
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int sel = 0;
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while (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel < min_uA)
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sel++;
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if (chg_min_uA + CHGIN_ILIM_STEP_20mA * sel > max_uA)
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return -EINVAL;
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/* the first four codes for charger current are all 60mA */
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sel += 3;
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return regmap_write(rdev->regmap,
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MAX77693_CHG_REG_CHG_CNFG_09, sel);
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}
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/* end of CHARGER regulator ops */
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static const unsigned int max77693_safeout_table[] = {
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4850000,
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4900000,
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4950000,
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3300000,
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};
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static struct regulator_ops max77693_safeout_ops = {
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.list_voltage = regulator_list_voltage_table,
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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};
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static struct regulator_ops max77693_charger_ops = {
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.is_enabled = max77693_chg_is_enabled,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_current_limit = max77693_chg_get_current_limit,
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.set_current_limit = max77693_chg_set_current_limit,
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};
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#define regulator_desc_esafeout(_num) { \
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.name = "ESAFEOUT"#_num, \
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.id = MAX77693_ESAFEOUT##_num, \
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.n_voltages = 4, \
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.ops = &max77693_safeout_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.volt_table = max77693_safeout_table, \
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.vsel_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
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.vsel_mask = SAFEOUT_CTRL_SAFEOUT##_num##_MASK, \
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.enable_reg = MAX77693_CHG_REG_SAFEOUT_CTRL, \
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.enable_mask = SAFEOUT_CTRL_ENSAFEOUT##_num##_MASK , \
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}
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static const struct regulator_desc regulators[] = {
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regulator_desc_esafeout(1),
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regulator_desc_esafeout(2),
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{
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.name = "CHARGER",
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.id = MAX77693_CHARGER,
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.ops = &max77693_charger_ops,
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.type = REGULATOR_CURRENT,
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.owner = THIS_MODULE,
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.enable_reg = MAX77693_CHG_REG_CHG_CNFG_00,
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.enable_mask = CHG_CNFG_00_CHG_MASK |
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CHG_CNFG_00_BUCK_MASK,
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},
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};
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#ifdef CONFIG_OF
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static int max77693_pmic_dt_parse_rdata(struct device *dev,
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struct max77693_regulator_data **rdata)
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{
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struct device_node *np;
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struct of_regulator_match *rmatch;
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struct max77693_regulator_data *tmp;
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int i, matched = 0;
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np = of_get_child_by_name(dev->parent->of_node, "regulators");
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if (!np)
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return -EINVAL;
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rmatch = devm_kzalloc(dev,
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sizeof(*rmatch) * ARRAY_SIZE(regulators), GFP_KERNEL);
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if (!rmatch) {
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of_node_put(np);
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return -ENOMEM;
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}
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for (i = 0; i < ARRAY_SIZE(regulators); i++)
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rmatch[i].name = regulators[i].name;
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matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(regulators));
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of_node_put(np);
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if (matched <= 0)
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return matched;
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*rdata = devm_kzalloc(dev, sizeof(**rdata) * matched, GFP_KERNEL);
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if (!(*rdata))
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return -ENOMEM;
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tmp = *rdata;
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for (i = 0; i < matched; i++) {
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tmp->initdata = rmatch[i].init_data;
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tmp->of_node = rmatch[i].of_node;
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tmp->id = regulators[i].id;
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tmp++;
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}
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return matched;
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}
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#else
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static int max77693_pmic_dt_parse_rdata(struct device *dev,
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struct max77693_regulator_data **rdata)
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{
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return 0;
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}
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#endif /* CONFIG_OF */
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static int max77693_pmic_init_rdata(struct device *dev,
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struct max77693_regulator_data **rdata)
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{
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struct max77693_platform_data *pdata;
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int num_regulators = 0;
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pdata = dev_get_platdata(dev->parent);
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if (pdata) {
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*rdata = pdata->regulators;
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num_regulators = pdata->num_regulators;
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}
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if (!(*rdata) && dev->parent->of_node)
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num_regulators = max77693_pmic_dt_parse_rdata(dev, rdata);
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return num_regulators;
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}
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static int max77693_pmic_probe(struct platform_device *pdev)
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{
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struct max77693_dev *iodev = dev_get_drvdata(pdev->dev.parent);
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struct max77693_regulator_data *rdata = NULL;
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int num_rdata, i;
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struct regulator_config config = { };
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num_rdata = max77693_pmic_init_rdata(&pdev->dev, &rdata);
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if (!rdata || num_rdata <= 0) {
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dev_err(&pdev->dev, "No init data supplied.\n");
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return -ENODEV;
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}
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config.dev = &pdev->dev;
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config.regmap = iodev->regmap;
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for (i = 0; i < num_rdata; i++) {
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int id = rdata[i].id;
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struct regulator_dev *rdev;
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config.init_data = rdata[i].initdata;
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config.of_node = rdata[i].of_node;
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rdev = devm_regulator_register(&pdev->dev,
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®ulators[id], &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev,
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"Failed to initialize regulator-%d\n", id);
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return PTR_ERR(rdev);
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}
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}
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return 0;
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}
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static const struct platform_device_id max77693_pmic_id[] = {
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{"max77693-pmic", 0},
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{},
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};
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MODULE_DEVICE_TABLE(platform, max77693_pmic_id);
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static struct platform_driver max77693_pmic_driver = {
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.driver = {
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.name = "max77693-pmic",
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},
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.probe = max77693_pmic_probe,
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.id_table = max77693_pmic_id,
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};
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module_platform_driver(max77693_pmic_driver);
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MODULE_DESCRIPTION("MAXIM MAX77693 regulator driver");
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MODULE_AUTHOR("Jonghwa Lee <jonghwa3.lee@samsung.com>");
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MODULE_LICENSE("GPL");
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