1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
5 * Copyright 2009,2010 Wolfson Microelectronics PLC.
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
10 #include <linux/kernel.h>
11 #include <linux/init.h>
14 #include <linux/spi/spi.h>
15 #include <linux/regmap.h>
16 #include <linux/err.h>
18 #include <linux/mfd/wm831x/core.h>
20 static int wm831x_spi_probe(struct spi_device *spi)
22 struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
23 struct wm831x *wm831x;
24 enum wm831x_parent type;
27 type = (uintptr_t)spi_get_device_match_data(spi);
29 dev_err(&spi->dev, "Failed to match device\n");
33 wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
37 spi->mode = SPI_MODE_0;
39 spi_set_drvdata(spi, wm831x);
40 wm831x->dev = &spi->dev;
43 wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
44 if (IS_ERR(wm831x->regmap)) {
45 ret = PTR_ERR(wm831x->regmap);
46 dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
52 memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
54 return wm831x_device_init(wm831x, spi->irq);
57 static int wm831x_spi_suspend(struct device *dev)
59 struct wm831x *wm831x = dev_get_drvdata(dev);
61 return wm831x_device_suspend(wm831x);
64 static int wm831x_spi_poweroff(struct device *dev)
66 struct wm831x *wm831x = dev_get_drvdata(dev);
68 wm831x_device_shutdown(wm831x);
73 static const struct dev_pm_ops wm831x_spi_pm = {
74 .freeze = wm831x_spi_suspend,
75 .suspend = wm831x_spi_suspend,
76 .poweroff = wm831x_spi_poweroff,
79 static const struct spi_device_id wm831x_spi_ids[] = {
90 static struct spi_driver wm831x_spi_driver = {
94 .of_match_table = of_match_ptr(wm831x_of_match),
95 .suppress_bind_attrs = true,
97 .id_table = wm831x_spi_ids,
98 .probe = wm831x_spi_probe,
101 static int __init wm831x_spi_init(void)
105 ret = spi_register_driver(&wm831x_spi_driver);
107 pr_err("Failed to register WM831x SPI driver: %d\n", ret);
111 subsys_initcall(wm831x_spi_init);