110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2021 ROHM Semiconductors
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*
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* ROHM BD9576MUF and BD9573MUF PMIC driver
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*/
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/irq.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/rohm-bd957x.h>
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#include <linux/mfd/rohm-generic.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/types.h>
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static struct mfd_cell bd9573_mfd_cells[] = {
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{ .name = "bd9573-regulator", },
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{ .name = "bd9576-wdt", },
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};
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static struct mfd_cell bd9576_mfd_cells[] = {
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{ .name = "bd9576-regulator", },
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{ .name = "bd9576-wdt", },
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};
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static const struct regmap_range volatile_ranges[] = {
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regmap_reg_range(BD957X_REG_SMRB_ASSERT, BD957X_REG_SMRB_ASSERT),
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regmap_reg_range(BD957X_REG_PMIC_INTERNAL_STAT,
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BD957X_REG_PMIC_INTERNAL_STAT),
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regmap_reg_range(BD957X_REG_INT_THERM_STAT, BD957X_REG_INT_THERM_STAT),
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regmap_reg_range(BD957X_REG_INT_OVP_STAT, BD957X_REG_INT_SYS_STAT),
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regmap_reg_range(BD957X_REG_INT_MAIN_STAT, BD957X_REG_INT_MAIN_STAT),
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};
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static const struct regmap_access_table volatile_regs = {
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.yes_ranges = &volatile_ranges[0],
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.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
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};
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static struct regmap_config bd957x_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.volatile_table = &volatile_regs,
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.max_register = BD957X_MAX_REGISTER,
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.cache_type = REGCACHE_RBTREE,
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};
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static int bd957x_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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int ret;
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struct regmap *regmap;
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struct mfd_cell *cells;
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int num_cells;
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unsigned long chip_type;
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chip_type = (unsigned long)of_device_get_match_data(&i2c->dev);
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switch (chip_type) {
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case ROHM_CHIP_TYPE_BD9576:
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cells = bd9576_mfd_cells;
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num_cells = ARRAY_SIZE(bd9576_mfd_cells);
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break;
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case ROHM_CHIP_TYPE_BD9573:
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cells = bd9573_mfd_cells;
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num_cells = ARRAY_SIZE(bd9573_mfd_cells);
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break;
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default:
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dev_err(&i2c->dev, "Unknown device type");
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return -EINVAL;
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}
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regmap = devm_regmap_init_i2c(i2c, &bd957x_regmap);
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if (IS_ERR(regmap)) {
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dev_err(&i2c->dev, "Failed to initialize Regmap\n");
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return PTR_ERR(regmap);
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}
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ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, cells,
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num_cells, NULL, 0, NULL);
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if (ret)
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dev_err(&i2c->dev, "Failed to create subdevices\n");
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return ret;
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}
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static const struct of_device_id bd957x_of_match[] = {
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{ .compatible = "rohm,bd9576", .data = (void *)ROHM_CHIP_TYPE_BD9576, },
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{ .compatible = "rohm,bd9573", .data = (void *)ROHM_CHIP_TYPE_BD9573, },
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{ },
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};
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MODULE_DEVICE_TABLE(of, bd957x_of_match);
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static struct i2c_driver bd957x_drv = {
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.driver = {
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.name = "rohm-bd957x",
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.of_match_table = bd957x_of_match,
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},
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.probe = &bd957x_i2c_probe,
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};
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module_i2c_driver(bd957x_drv);
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MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
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MODULE_DESCRIPTION("ROHM BD9576MUF and BD9573MUF Power Management IC driver");
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MODULE_LICENSE("GPL");
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