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There is no check that tps->strobes is allocated successfully in tps65217_regulator_probe(). The patch adds corresponding check. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Anton Vasilyev <vasilyev@ispras.ru> Signed-off-by: Mark Brown <broonie@kernel.org>
287 lines
9.2 KiB
C
287 lines
9.2 KiB
C
/*
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* tps65217-regulator.c
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*
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* Regulator driver for TPS65217 PMIC
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*
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of 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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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/of_regulator.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/tps65217.h>
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#define TPS65217_REGULATOR(_name, _id, _of_match, _ops, _n, _vr, _vm, _em, \
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_t, _lr, _nlr, _sr, _sm) \
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{ \
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.name = _name, \
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.id = _id, \
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.of_match = of_match_ptr(_of_match), \
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.regulators_node= of_match_ptr("regulators"), \
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.ops = &_ops, \
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.n_voltages = _n, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.vsel_reg = _vr, \
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.vsel_mask = _vm, \
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.enable_reg = TPS65217_REG_ENABLE, \
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.enable_mask = _em, \
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.volt_table = _t, \
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.linear_ranges = _lr, \
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.n_linear_ranges = _nlr, \
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.bypass_reg = _sr, \
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.bypass_mask = _sm, \
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} \
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static const unsigned int LDO1_VSEL_table[] = {
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1000000, 1100000, 1200000, 1250000,
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1300000, 1350000, 1400000, 1500000,
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1600000, 1800000, 2500000, 2750000,
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2800000, 3000000, 3100000, 3300000,
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};
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static const struct regulator_linear_range tps65217_uv1_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
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REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
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REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
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REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
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REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
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};
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static const struct regulator_linear_range tps65217_uv2_ranges[] = {
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REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
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REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
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REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
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};
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static int tps65217_pmic_enable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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/* Enable the regulator and password protection is level 1 */
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return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
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dev->desc->enable_mask, dev->desc->enable_mask,
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TPS65217_PROTECT_L1);
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}
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static int tps65217_pmic_disable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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/* Disable the regulator and password protection is level 1 */
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return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
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dev->desc->enable_mask, TPS65217_PROTECT_L1);
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}
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static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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int ret;
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int rid = rdev_get_id(dev);
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/* Set the voltage based on vsel value and write protect level is 2 */
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ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
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selector, TPS65217_PROTECT_L2);
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/* Set GO bit for DCDCx to initiate voltage transistion */
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switch (rid) {
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case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
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ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
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TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
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TPS65217_PROTECT_L2);
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break;
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}
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return ret;
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}
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static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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return tps65217_clear_bits(tps, dev->desc->bypass_reg,
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dev->desc->bypass_mask,
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TPS65217_PROTECT_L1);
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}
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static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
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{
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struct tps65217 *tps = rdev_get_drvdata(dev);
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unsigned int rid = rdev_get_id(dev);
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if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
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return -EINVAL;
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if (!tps->strobes[rid])
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return -EINVAL;
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return tps65217_set_bits(tps, dev->desc->bypass_reg,
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dev->desc->bypass_mask,
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tps->strobes[rid], TPS65217_PROTECT_L1);
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}
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/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
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static struct regulator_ops tps65217_pmic_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = tps65217_pmic_enable,
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.disable = tps65217_pmic_disable,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = tps65217_pmic_set_voltage_sel,
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.set_suspend_enable = tps65217_pmic_set_suspend_enable,
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.set_suspend_disable = tps65217_pmic_set_suspend_disable,
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};
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/* Operations permitted on LDO1 */
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static struct regulator_ops tps65217_pmic_ldo1_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = tps65217_pmic_enable,
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.disable = tps65217_pmic_disable,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = tps65217_pmic_set_voltage_sel,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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.set_suspend_enable = tps65217_pmic_set_suspend_enable,
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.set_suspend_disable = tps65217_pmic_set_suspend_disable,
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};
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static const struct regulator_desc regulators[] = {
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TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
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TPS65217_SEQ1_DC1_SEQ_MASK),
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TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
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TPS65217_SEQ1_DC2_SEQ_MASK),
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TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
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tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
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TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2,
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TPS65217_SEQ2_DC3_SEQ_MASK),
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TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
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tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
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TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
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LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
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TPS65217_SEQ2_LDO1_SEQ_MASK),
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TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
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64, TPS65217_REG_DEFLDO2,
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TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
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NULL, tps65217_uv1_ranges,
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ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
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TPS65217_SEQ3_LDO2_SEQ_MASK),
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TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
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32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
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TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
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NULL, tps65217_uv2_ranges,
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ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
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TPS65217_SEQ3_LDO3_SEQ_MASK),
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TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
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32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
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TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
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NULL, tps65217_uv2_ranges,
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ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
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TPS65217_SEQ4_LDO4_SEQ_MASK),
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};
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static int tps65217_regulator_probe(struct platform_device *pdev)
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{
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struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
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struct tps65217_board *pdata = dev_get_platdata(tps->dev);
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struct regulator_dev *rdev;
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struct regulator_config config = { };
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int i, ret;
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unsigned int val;
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/* Allocate memory for strobes */
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tps->strobes = devm_kcalloc(&pdev->dev,
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TPS65217_NUM_REGULATOR, sizeof(u8),
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GFP_KERNEL);
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if (!tps->strobes)
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return -ENOMEM;
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platform_set_drvdata(pdev, tps);
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for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
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/* Register the regulators */
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config.dev = tps->dev;
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if (pdata)
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config.init_data = pdata->tps65217_init_data[i];
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config.driver_data = tps;
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config.regmap = tps->regmap;
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(tps->dev, "failed to register %s regulator\n",
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pdev->name);
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return PTR_ERR(rdev);
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}
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/* Store default strobe info */
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ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
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tps->strobes[i] = val & regulators[i].bypass_mask;
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}
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return 0;
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}
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static struct platform_driver tps65217_regulator_driver = {
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.driver = {
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.name = "tps65217-pmic",
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},
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.probe = tps65217_regulator_probe,
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};
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static int __init tps65217_regulator_init(void)
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{
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return platform_driver_register(&tps65217_regulator_driver);
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}
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subsys_initcall(tps65217_regulator_init);
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static void __exit tps65217_regulator_exit(void)
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{
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platform_driver_unregister(&tps65217_regulator_driver);
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}
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module_exit(tps65217_regulator_exit);
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MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
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MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
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MODULE_ALIAS("platform:tps65217-pmic");
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MODULE_LICENSE("GPL v2");
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