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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2025 Analog Devices Inc.
* Copyright (C) 2025 BayLibre, SAS
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/spi/offload/provider.h>
static bool adi_util_sigma_delta_match(struct spi_offload_trigger *trigger,
enum spi_offload_trigger_type type,
u64 *args, u32 nargs)
{
return type == SPI_OFFLOAD_TRIGGER_DATA_READY && nargs == 0;
}
static const struct spi_offload_trigger_ops adi_util_sigma_delta_ops = {
.match = adi_util_sigma_delta_match,
};
static int adi_util_sigma_delta_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct spi_offload_trigger_info info = {
.fwnode = dev_fwnode(dev),
.ops = &adi_util_sigma_delta_ops,
};
struct clk *clk;
clk = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(clk))
return dev_err_probe(dev, PTR_ERR(clk), "Failed to get clock\n");
return devm_spi_offload_trigger_register(dev, &info);
}
static const struct of_device_id adi_util_sigma_delta_of_match_table[] = {
{ .compatible = "adi,util-sigma-delta-spi", },
{ }
};
MODULE_DEVICE_TABLE(of, adi_util_sigma_delta_of_match_table);
static struct platform_driver adi_util_sigma_delta_driver = {
.probe = adi_util_sigma_delta_probe,
.driver = {
.name = "adi-util-sigma-delta-spi",
.of_match_table = adi_util_sigma_delta_of_match_table,
},
};
module_platform_driver(adi_util_sigma_delta_driver);
MODULE_AUTHOR("David Lechner <dlechner@baylibre.com>");
MODULE_DESCRIPTION("ADI Sigma-Delta SPI offload trigger utility driver");
MODULE_LICENSE("GPL");
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