// SPDX-License-Identifier: GPL-2.0-or-later /* * wm831x-i2c.c -- I2C access for Wolfson WM831x PMICs * * Copyright 2009,2010 Wolfson Microelectronics PLC. * * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/delay.h> #include <linux/mfd/core.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/mfd/wm831x/core.h> #include <linux/mfd/wm831x/pdata.h> static int wm831x_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct wm831x_pdata *pdata = dev_get_platdata(&i2c->dev); const struct of_device_id *of_id; struct wm831x *wm831x; enum wm831x_parent type; int ret; if (i2c->dev.of_node) { of_id = of_match_device(wm831x_of_match, &i2c->dev); if (!of_id) { dev_err(&i2c->dev, "Failed to match device\n"); return -ENODEV; } type = (enum wm831x_parent)of_id->data; } else { type = (enum wm831x_parent)id->driver_data; } wm831x = devm_kzalloc(&i2c->dev, sizeof(struct wm831x), GFP_KERNEL); if (wm831x == NULL) return -ENOMEM; i2c_set_clientdata(i2c, wm831x); wm831x->dev = &i2c->dev; wm831x->type = type; wm831x->regmap = devm_regmap_init_i2c(i2c, &wm831x_regmap_config); if (IS_ERR(wm831x->regmap)) { ret = PTR_ERR(wm831x->regmap); dev_err(wm831x->dev, "Failed to allocate register map: %d\n", ret); return ret; } if (pdata) memcpy(&wm831x->pdata, pdata, sizeof(*pdata)); return wm831x_device_init(wm831x, i2c->irq); } static int wm831x_i2c_suspend(struct device *dev) { struct wm831x *wm831x = dev_get_drvdata(dev); return wm831x_device_suspend(wm831x); } static int wm831x_i2c_poweroff(struct device *dev) { struct wm831x *wm831x = dev_get_drvdata(dev); wm831x_device_shutdown(wm831x); return 0; } static const struct i2c_device_id wm831x_i2c_id[] = { { "wm8310", WM8310 }, { "wm8311", WM8311 }, { "wm8312", WM8312 }, { "wm8320", WM8320 }, { "wm8321", WM8321 }, { "wm8325", WM8325 }, { "wm8326", WM8326 }, { } }; static const struct dev_pm_ops wm831x_pm_ops = { .suspend = wm831x_i2c_suspend, .poweroff = wm831x_i2c_poweroff, }; static struct i2c_driver wm831x_i2c_driver = { .driver = { .name = "wm831x", .pm = &wm831x_pm_ops, .of_match_table = of_match_ptr(wm831x_of_match), .suppress_bind_attrs = true, }, .probe = wm831x_i2c_probe, .id_table = wm831x_i2c_id, }; static int __init wm831x_i2c_init(void) { int ret; ret = i2c_add_driver(&wm831x_i2c_driver); if (ret != 0) pr_err("Failed to register wm831x I2C driver: %d\n", ret); return ret; } subsys_initcall(wm831x_i2c_init);