^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * wm831x-spi.c -- SPI access for Wolfson WM831x PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009,2010 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/wm831x/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int wm831x_spi_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) const struct spi_device_id *id = spi_get_device_id(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) const struct of_device_id *of_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct wm831x *wm831x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) enum wm831x_parent type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (spi->dev.of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) of_id = of_match_device(wm831x_of_match, &spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (!of_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) dev_err(&spi->dev, "Failed to match device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) type = (enum wm831x_parent)of_id->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) type = (enum wm831x_parent)id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (wm831x == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) spi->mode = SPI_MODE_0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) spi_set_drvdata(spi, wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) wm831x->dev = &spi->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) wm831x->type = type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) wm831x->regmap = devm_regmap_init_spi(spi, &wm831x_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (IS_ERR(wm831x->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) ret = PTR_ERR(wm831x->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) dev_err(wm831x->dev, "Failed to allocate register map: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (pdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) memcpy(&wm831x->pdata, pdata, sizeof(*pdata));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return wm831x_device_init(wm831x, spi->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int wm831x_spi_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return wm831x_device_suspend(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int wm831x_spi_poweroff(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct wm831x *wm831x = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) wm831x_device_shutdown(wm831x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static const struct dev_pm_ops wm831x_spi_pm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .freeze = wm831x_spi_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .suspend = wm831x_spi_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .poweroff = wm831x_spi_poweroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static const struct spi_device_id wm831x_spi_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) { "wm8310", WM8310 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) { "wm8311", WM8311 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) { "wm8312", WM8312 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) { "wm8320", WM8320 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) { "wm8321", WM8321 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) { "wm8325", WM8325 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) { "wm8326", WM8326 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static struct spi_driver wm831x_spi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .name = "wm831x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .pm = &wm831x_spi_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .of_match_table = of_match_ptr(wm831x_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .suppress_bind_attrs = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .id_table = wm831x_spi_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .probe = wm831x_spi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int __init wm831x_spi_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) ret = spi_register_driver(&wm831x_spi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) pr_err("Failed to register WM831x SPI driver: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) subsys_initcall(wm831x_spi_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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