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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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dc21c7ad3a
The LP873X chip is a power management IC for Portable Navigation Systems
and Tablet Computing devices. It contains the following components:
- Regulators.
- Configurable General Purpose Output Signals (GPO).
PMIC interacts with the main processor through i2c. PMIC has
couple of LDOs (Linear Regulators), couple of BUCKs (Step-Down DC-DC
Converter Cores) and GPOs (General Purpose Output Signals).
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/*
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* Copyright (C) 2016 Texas Instruments Incorporated - http://www.ti.com/
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*
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* Author: Keerthy <j-keerthy@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/interrupt.h>
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#include <linux/mfd/core.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/lp873x.h>
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static const struct regmap_config lp873x_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = LP873X_REG_MAX,
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};
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static const struct mfd_cell lp873x_cells[] = {
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{ .name = "lp873x-regulator", },
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{ .name = "lp873x-gpio", },
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};
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static int lp873x_probe(struct i2c_client *client,
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const struct i2c_device_id *ids)
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{
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struct lp873x *lp873;
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int ret;
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unsigned int otpid;
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lp873 = devm_kzalloc(&client->dev, sizeof(*lp873), GFP_KERNEL);
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if (!lp873)
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return -ENOMEM;
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lp873->dev = &client->dev;
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lp873->regmap = devm_regmap_init_i2c(client, &lp873x_regmap_config);
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if (IS_ERR(lp873->regmap)) {
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ret = PTR_ERR(lp873->regmap);
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dev_err(lp873->dev,
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"Failed to initialize register map: %d\n", ret);
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return ret;
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}
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mutex_init(&lp873->lock);
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ret = regmap_read(lp873->regmap, LP873X_REG_OTP_REV, &otpid);
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if (ret) {
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dev_err(lp873->dev, "Failed to read OTP ID\n");
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return ret;
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}
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lp873->rev = otpid & LP873X_OTP_REV_OTP_ID;
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i2c_set_clientdata(client, lp873);
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ret = mfd_add_devices(lp873->dev, PLATFORM_DEVID_AUTO, lp873x_cells,
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ARRAY_SIZE(lp873x_cells), NULL, 0, NULL);
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return ret;
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}
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static const struct of_device_id of_lp873x_match_table[] = {
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{ .compatible = "ti,lp8733", },
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{ .compatible = "ti,lp8732", },
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{}
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};
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MODULE_DEVICE_TABLE(of, of_lp873x_match_table);
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static const struct i2c_device_id lp873x_id_table[] = {
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{ "lp873x", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, lp873x_id_table);
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static struct i2c_driver lp873x_driver = {
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.driver = {
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.name = "lp873x",
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.of_match_table = of_lp873x_match_table,
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},
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.probe = lp873x_probe,
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.id_table = lp873x_id_table,
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};
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module_i2c_driver(lp873x_driver);
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MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
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MODULE_DESCRIPTION("LP873X chip family Multi-Function Device driver");
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MODULE_LICENSE("GPL v2");
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