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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/mfd/wm831x-spi.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/mfd/wm831x-spi.c')
-rw-r--r-- | drivers/mfd/wm831x-spi.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-spi.c b/drivers/mfd/wm831x-spi.c new file mode 100644 index 0000000000..76be7ef5c9 --- /dev/null +++ b/drivers/mfd/wm831x-spi.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * wm831x-spi.c -- SPI 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/of.h> +#include <linux/of_device.h> +#include <linux/pm.h> +#include <linux/spi/spi.h> +#include <linux/regmap.h> +#include <linux/err.h> + +#include <linux/mfd/wm831x/core.h> + +static int wm831x_spi_probe(struct spi_device *spi) +{ + struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev); + const struct spi_device_id *id = spi_get_device_id(spi); + const struct of_device_id *of_id; + struct wm831x *wm831x; + enum wm831x_parent type; + int ret; + + if (spi->dev.of_node) { + of_id = of_match_device(wm831x_of_match, &spi->dev); + if (!of_id) { + dev_err(&spi->dev, "Failed to match device\n"); + return -ENODEV; + } + type = (uintptr_t)of_id->data; + } else { + type = (enum wm831x_parent)id->driver_data; + } + + wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL); + if (wm831x == NULL) + return -ENOMEM; + + spi->mode = SPI_MODE_0; + + spi_set_drvdata(spi, wm831x); + wm831x->dev = &spi->dev; + wm831x->type = type; + + wm831x->regmap = devm_regmap_init_spi(spi, &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, spi->irq); +} + +static int wm831x_spi_suspend(struct device *dev) +{ + struct wm831x *wm831x = dev_get_drvdata(dev); + + return wm831x_device_suspend(wm831x); +} + +static int wm831x_spi_poweroff(struct device *dev) +{ + struct wm831x *wm831x = dev_get_drvdata(dev); + + wm831x_device_shutdown(wm831x); + + return 0; +} + +static const struct dev_pm_ops wm831x_spi_pm = { + .freeze = wm831x_spi_suspend, + .suspend = wm831x_spi_suspend, + .poweroff = wm831x_spi_poweroff, +}; + +static const struct spi_device_id wm831x_spi_ids[] = { + { "wm8310", WM8310 }, + { "wm8311", WM8311 }, + { "wm8312", WM8312 }, + { "wm8320", WM8320 }, + { "wm8321", WM8321 }, + { "wm8325", WM8325 }, + { "wm8326", WM8326 }, + { }, +}; + +static struct spi_driver wm831x_spi_driver = { + .driver = { + .name = "wm831x", + .pm = &wm831x_spi_pm, + .of_match_table = of_match_ptr(wm831x_of_match), + .suppress_bind_attrs = true, + }, + .id_table = wm831x_spi_ids, + .probe = wm831x_spi_probe, +}; + +static int __init wm831x_spi_init(void) +{ + int ret; + + ret = spi_register_driver(&wm831x_spi_driver); + if (ret != 0) + pr_err("Failed to register WM831x SPI driver: %d\n", ret); + + return 0; +} +subsys_initcall(wm831x_spi_init); |