12874c5fdSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
22aa13b9eSMark Brown /*
32aa13b9eSMark Brown * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
42aa13b9eSMark Brown *
52aa13b9eSMark Brown * Copyright 2009,2010 Wolfson Microelectronics PLC.
62aa13b9eSMark Brown *
72aa13b9eSMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
82aa13b9eSMark Brown */
92aa13b9eSMark Brown
102aa13b9eSMark Brown #include <linux/kernel.h>
11e85c5f0aSPaul Gortmaker #include <linux/init.h>
12f6dd8449SCharles Keepax #include <linux/of.h>
13f6dd8449SCharles Keepax #include <linux/of_device.h>
1487d1906dSMark Brown #include <linux/pm.h>
152aa13b9eSMark Brown #include <linux/spi/spi.h>
161df5981bSMark Brown #include <linux/regmap.h>
171df5981bSMark Brown #include <linux/err.h>
182aa13b9eSMark Brown
192aa13b9eSMark Brown #include <linux/mfd/wm831x/core.h>
202aa13b9eSMark Brown
wm831x_spi_probe(struct spi_device * spi)21f791be49SBill Pemberton static int wm831x_spi_probe(struct spi_device *spi)
222aa13b9eSMark Brown {
23f6dd8449SCharles Keepax struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
245570c2f7SMark Brown const struct spi_device_id *id = spi_get_device_id(spi);
25f6dd8449SCharles Keepax const struct of_device_id *of_id;
262aa13b9eSMark Brown struct wm831x *wm831x;
272aa13b9eSMark Brown enum wm831x_parent type;
281df5981bSMark Brown int ret;
292aa13b9eSMark Brown
30f6dd8449SCharles Keepax if (spi->dev.of_node) {
31f6dd8449SCharles Keepax of_id = of_match_device(wm831x_of_match, &spi->dev);
327b55033fSGustavo A. R. Silva if (!of_id) {
337b55033fSGustavo A. R. Silva dev_err(&spi->dev, "Failed to match device\n");
347b55033fSGustavo A. R. Silva return -ENODEV;
357b55033fSGustavo A. R. Silva }
36*4e57d142SKrzysztof Kozlowski type = (uintptr_t)of_id->data;
37f6dd8449SCharles Keepax } else {
385570c2f7SMark Brown type = (enum wm831x_parent)id->driver_data;
39f6dd8449SCharles Keepax }
402aa13b9eSMark Brown
41d48cbb74SMark Brown wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
422aa13b9eSMark Brown if (wm831x == NULL)
432aa13b9eSMark Brown return -ENOMEM;
442aa13b9eSMark Brown
452aa13b9eSMark Brown spi->mode = SPI_MODE_0;
462aa13b9eSMark Brown
470c0d2ab0SJingoo Han spi_set_drvdata(spi, wm831x);
482aa13b9eSMark Brown wm831x->dev = &spi->dev;
49f6dd8449SCharles Keepax wm831x->type = type;
501df5981bSMark Brown
51130a7032SMark Brown wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
521df5981bSMark Brown if (IS_ERR(wm831x->regmap)) {
531df5981bSMark Brown ret = PTR_ERR(wm831x->regmap);
541df5981bSMark Brown dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
551df5981bSMark Brown ret);
561df5981bSMark Brown return ret;
571df5981bSMark Brown }
582aa13b9eSMark Brown
59f6dd8449SCharles Keepax if (pdata)
60f6dd8449SCharles Keepax memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
61f6dd8449SCharles Keepax
62f6dd8449SCharles Keepax return wm831x_device_init(wm831x, spi->irq);
632aa13b9eSMark Brown }
642aa13b9eSMark Brown
wm831x_spi_suspend(struct device * dev)6587d1906dSMark Brown static int wm831x_spi_suspend(struct device *dev)
662aa13b9eSMark Brown {
6787d1906dSMark Brown struct wm831x *wm831x = dev_get_drvdata(dev);
682aa13b9eSMark Brown
692aa13b9eSMark Brown return wm831x_device_suspend(wm831x);
702aa13b9eSMark Brown }
712aa13b9eSMark Brown
wm831x_spi_poweroff(struct device * dev)72b9736a16SMark Brown static int wm831x_spi_poweroff(struct device *dev)
73523d9cfbSMark Brown {
74b9736a16SMark Brown struct wm831x *wm831x = dev_get_drvdata(dev);
75523d9cfbSMark Brown
76523d9cfbSMark Brown wm831x_device_shutdown(wm831x);
77b9736a16SMark Brown
78b9736a16SMark Brown return 0;
79523d9cfbSMark Brown }
80523d9cfbSMark Brown
8187d1906dSMark Brown static const struct dev_pm_ops wm831x_spi_pm = {
8287d1906dSMark Brown .freeze = wm831x_spi_suspend,
8387d1906dSMark Brown .suspend = wm831x_spi_suspend,
84b9736a16SMark Brown .poweroff = wm831x_spi_poweroff,
8587d1906dSMark Brown };
8687d1906dSMark Brown
875570c2f7SMark Brown static const struct spi_device_id wm831x_spi_ids[] = {
885570c2f7SMark Brown { "wm8310", WM8310 },
895570c2f7SMark Brown { "wm8311", WM8311 },
905570c2f7SMark Brown { "wm8312", WM8312 },
915570c2f7SMark Brown { "wm8320", WM8320 },
925570c2f7SMark Brown { "wm8321", WM8321 },
935570c2f7SMark Brown { "wm8325", WM8325 },
945570c2f7SMark Brown { "wm8326", WM8326 },
955570c2f7SMark Brown { },
962aa13b9eSMark Brown };
972aa13b9eSMark Brown
985570c2f7SMark Brown static struct spi_driver wm831x_spi_driver = {
992aa13b9eSMark Brown .driver = {
1005570c2f7SMark Brown .name = "wm831x",
10187d1906dSMark Brown .pm = &wm831x_spi_pm,
102f6dd8449SCharles Keepax .of_match_table = of_match_ptr(wm831x_of_match),
103e85c5f0aSPaul Gortmaker .suppress_bind_attrs = true,
1042aa13b9eSMark Brown },
1055570c2f7SMark Brown .id_table = wm831x_spi_ids,
106412dc11dSMark Brown .probe = wm831x_spi_probe,
107412dc11dSMark Brown };
108412dc11dSMark Brown
wm831x_spi_init(void)1092aa13b9eSMark Brown static int __init wm831x_spi_init(void)
1102aa13b9eSMark Brown {
1112aa13b9eSMark Brown int ret;
1122aa13b9eSMark Brown
1135570c2f7SMark Brown ret = spi_register_driver(&wm831x_spi_driver);
1142aa13b9eSMark Brown if (ret != 0)
1155570c2f7SMark Brown pr_err("Failed to register WM831x SPI driver: %d\n", ret);
116412dc11dSMark Brown
1172aa13b9eSMark Brown return 0;
1182aa13b9eSMark Brown }
1192aa13b9eSMark Brown subsys_initcall(wm831x_spi_init);
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