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![Axel Lin](/assets/img/avatar_default.png)
The dev parameter is the device requesting the data. In this case it should be &pdev->dev rather than pdev->dev.parent. The dev parameter is used to call devm_kzalloc in of_get_regulator_init_data(), which means this fixes a memory leak because the memory is allocated every time probe() is called, thus it should be freed when this driver is unloaded. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
368 lines
10 KiB
C
368 lines
10 KiB
C
/*
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* Regulator driver for tps65090 power management chip.
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*
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* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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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, see <http://www.gnu.org/licenses/>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/slab.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/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/mfd/tps65090.h>
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struct tps65090_regulator {
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struct device *dev;
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struct regulator_desc *desc;
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struct regulator_dev *rdev;
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};
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static struct regulator_ops tps65090_ext_control_ops = {
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};
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static struct regulator_ops tps65090_reg_contol_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static struct regulator_ops tps65090_ldo_ops = {
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};
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#define tps65090_REG_DESC(_id, _sname, _en_reg, _ops) \
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{ \
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.name = "TPS65090_RAILS"#_id, \
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.supply_name = _sname, \
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.id = TPS65090_REGULATOR_##_id, \
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.ops = &_ops, \
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.enable_reg = _en_reg, \
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.enable_mask = BIT(0), \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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}
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static struct regulator_desc tps65090_regulator_desc[] = {
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tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_reg_contol_ops),
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tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_reg_contol_ops),
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tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_reg_contol_ops),
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tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_reg_contol_ops),
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tps65090_REG_DESC(LDO1, "vsys-l1", 0, tps65090_ldo_ops),
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tps65090_REG_DESC(LDO2, "vsys-l2", 0, tps65090_ldo_ops),
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};
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static inline bool is_dcdc(int id)
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{
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switch (id) {
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case TPS65090_REGULATOR_DCDC1:
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case TPS65090_REGULATOR_DCDC2:
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case TPS65090_REGULATOR_DCDC3:
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return true;
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default:
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return false;
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}
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}
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static int tps65090_config_ext_control(
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struct tps65090_regulator *ri, bool enable)
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{
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int ret;
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struct device *parent = ri->dev->parent;
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unsigned int reg_en_reg = ri->desc->enable_reg;
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if (enable)
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ret = tps65090_set_bits(parent, reg_en_reg, 1);
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else
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ret = tps65090_clr_bits(parent, reg_en_reg, 1);
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if (ret < 0)
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dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg);
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return ret;
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}
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static int tps65090_regulator_disable_ext_control(
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struct tps65090_regulator *ri,
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struct tps65090_regulator_plat_data *tps_pdata)
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{
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int ret = 0;
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struct device *parent = ri->dev->parent;
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unsigned int reg_en_reg = ri->desc->enable_reg;
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/*
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* First enable output for internal control if require.
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* And then disable external control.
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*/
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if (tps_pdata->reg_init_data->constraints.always_on ||
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tps_pdata->reg_init_data->constraints.boot_on) {
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ret = tps65090_set_bits(parent, reg_en_reg, 0);
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if (ret < 0) {
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dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg);
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return ret;
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}
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}
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return tps65090_config_ext_control(ri, false);
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}
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static void tps65090_configure_regulator_config(
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struct tps65090_regulator_plat_data *tps_pdata,
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struct regulator_config *config)
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{
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if (gpio_is_valid(tps_pdata->gpio)) {
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int gpio_flag = GPIOF_OUT_INIT_LOW;
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if (tps_pdata->reg_init_data->constraints.always_on ||
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tps_pdata->reg_init_data->constraints.boot_on)
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gpio_flag = GPIOF_OUT_INIT_HIGH;
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config->ena_gpio = tps_pdata->gpio;
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config->ena_gpio_flags = gpio_flag;
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}
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}
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#ifdef CONFIG_OF
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static struct of_regulator_match tps65090_matches[] = {
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{ .name = "dcdc1", },
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{ .name = "dcdc2", },
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{ .name = "dcdc3", },
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{ .name = "fet1", },
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{ .name = "fet2", },
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{ .name = "fet3", },
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{ .name = "fet4", },
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{ .name = "fet5", },
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{ .name = "fet6", },
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{ .name = "fet7", },
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{ .name = "ldo1", },
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{ .name = "ldo2", },
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};
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static struct tps65090_platform_data *tps65090_parse_dt_reg_data(
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struct platform_device *pdev,
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struct of_regulator_match **tps65090_reg_matches)
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{
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struct tps65090_platform_data *tps65090_pdata;
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struct device_node *np = pdev->dev.parent->of_node;
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struct device_node *regulators;
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int idx = 0, ret;
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struct tps65090_regulator_plat_data *reg_pdata;
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tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata),
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GFP_KERNEL);
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if (!tps65090_pdata) {
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dev_err(&pdev->dev, "Memory alloc for tps65090_pdata failed\n");
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return ERR_PTR(-ENOMEM);
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}
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reg_pdata = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX *
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sizeof(*reg_pdata), GFP_KERNEL);
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if (!reg_pdata) {
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dev_err(&pdev->dev, "Memory alloc for reg_pdata failed\n");
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return ERR_PTR(-ENOMEM);
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}
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regulators = of_find_node_by_name(np, "regulators");
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if (!regulators) {
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dev_err(&pdev->dev, "regulator node not found\n");
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return ERR_PTR(-ENODEV);
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}
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ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches,
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ARRAY_SIZE(tps65090_matches));
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if (ret < 0) {
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dev_err(&pdev->dev,
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"Error parsing regulator init data: %d\n", ret);
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return ERR_PTR(ret);
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}
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*tps65090_reg_matches = tps65090_matches;
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for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) {
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struct regulator_init_data *ri_data;
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struct tps65090_regulator_plat_data *rpdata;
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rpdata = ®_pdata[idx];
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ri_data = tps65090_matches[idx].init_data;
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if (!ri_data || !tps65090_matches[idx].of_node)
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continue;
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rpdata->reg_init_data = ri_data;
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rpdata->enable_ext_control = of_property_read_bool(
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tps65090_matches[idx].of_node,
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"ti,enable-ext-control");
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if (rpdata->enable_ext_control)
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rpdata->gpio = of_get_named_gpio(np,
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"dcdc-ext-control-gpios", 0);
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tps65090_pdata->reg_pdata[idx] = rpdata;
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}
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return tps65090_pdata;
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}
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#else
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static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data(
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struct platform_device *pdev,
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struct of_regulator_match **tps65090_reg_matches)
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{
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*tps65090_reg_matches = NULL;
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return NULL;
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}
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#endif
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static int tps65090_regulator_probe(struct platform_device *pdev)
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{
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struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
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struct tps65090_regulator *ri = NULL;
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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struct tps65090_regulator_plat_data *tps_pdata;
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struct tps65090_regulator *pmic;
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struct tps65090_platform_data *tps65090_pdata;
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struct of_regulator_match *tps65090_reg_matches = NULL;
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int num;
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int ret;
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dev_dbg(&pdev->dev, "Probing regulator\n");
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tps65090_pdata = dev_get_platdata(pdev->dev.parent);
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if (!tps65090_pdata && tps65090_mfd->dev->of_node)
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tps65090_pdata = tps65090_parse_dt_reg_data(pdev,
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&tps65090_reg_matches);
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if (IS_ERR_OR_NULL(tps65090_pdata)) {
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dev_err(&pdev->dev, "Platform data missing\n");
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return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL;
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}
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pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic),
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GFP_KERNEL);
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if (!pmic) {
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dev_err(&pdev->dev, "mem alloc for pmic failed\n");
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return -ENOMEM;
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}
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for (num = 0; num < TPS65090_REGULATOR_MAX; num++) {
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tps_pdata = tps65090_pdata->reg_pdata[num];
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ri = &pmic[num];
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ri->dev = &pdev->dev;
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ri->desc = &tps65090_regulator_desc[num];
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/*
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* TPS5090 DCDC support the control from external digital input.
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* Configure it as per platform data.
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*/
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if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
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if (tps_pdata->enable_ext_control) {
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tps65090_configure_regulator_config(
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tps_pdata, &config);
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ri->desc->ops = &tps65090_ext_control_ops;
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} else {
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ret = tps65090_regulator_disable_ext_control(
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ri, tps_pdata);
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if (ret < 0) {
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dev_err(&pdev->dev,
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"failed disable ext control\n");
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goto scrub;
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}
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}
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}
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config.dev = pdev->dev.parent;
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config.driver_data = ri;
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config.regmap = tps65090_mfd->rmap;
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if (tps_pdata)
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config.init_data = tps_pdata->reg_init_data;
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else
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config.init_data = NULL;
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if (tps65090_reg_matches)
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config.of_node = tps65090_reg_matches[num].of_node;
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else
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config.of_node = NULL;
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rdev = regulator_register(ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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ri->desc->name);
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ret = PTR_ERR(rdev);
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goto scrub;
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}
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ri->rdev = rdev;
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/* Enable external control if it is require */
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if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
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tps_pdata->enable_ext_control) {
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ret = tps65090_config_ext_control(ri, true);
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if (ret < 0) {
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/* Increment num to get unregister rdev */
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num++;
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goto scrub;
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}
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}
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}
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platform_set_drvdata(pdev, pmic);
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return 0;
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scrub:
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while (--num >= 0) {
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ri = &pmic[num];
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regulator_unregister(ri->rdev);
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}
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return ret;
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}
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static int tps65090_regulator_remove(struct platform_device *pdev)
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{
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struct tps65090_regulator *pmic = platform_get_drvdata(pdev);
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struct tps65090_regulator *ri;
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int num;
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for (num = 0; num < TPS65090_REGULATOR_MAX; ++num) {
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ri = &pmic[num];
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regulator_unregister(ri->rdev);
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}
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return 0;
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}
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static struct platform_driver tps65090_regulator_driver = {
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.driver = {
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.name = "tps65090-pmic",
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.owner = THIS_MODULE,
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},
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.probe = tps65090_regulator_probe,
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.remove = tps65090_regulator_remove,
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};
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static int __init tps65090_regulator_init(void)
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{
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return platform_driver_register(&tps65090_regulator_driver);
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}
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subsys_initcall(tps65090_regulator_init);
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static void __exit tps65090_regulator_exit(void)
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{
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platform_driver_unregister(&tps65090_regulator_driver);
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}
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module_exit(tps65090_regulator_exit);
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MODULE_DESCRIPTION("tps65090 regulator driver");
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MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tps65090-pmic");
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