1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2025 Analog Devices Inc. 4 * Copyright (C) 2025 BayLibre, SAS 5 */ 6 7 #include <linux/clk.h> 8 #include <linux/device.h> 9 #include <linux/mod_devicetable.h> 10 #include <linux/module.h> 11 #include <linux/platform_device.h> 12 #include <linux/property.h> 13 #include <linux/spi/offload/provider.h> 14 15 static bool adi_util_sigma_delta_match(struct spi_offload_trigger *trigger, 16 enum spi_offload_trigger_type type, 17 u64 *args, u32 nargs) 18 { 19 return type == SPI_OFFLOAD_TRIGGER_DATA_READY && nargs == 0; 20 } 21 22 static const struct spi_offload_trigger_ops adi_util_sigma_delta_ops = { 23 .match = adi_util_sigma_delta_match, 24 }; 25 26 static int adi_util_sigma_delta_probe(struct platform_device *pdev) 27 { 28 struct device *dev = &pdev->dev; 29 struct spi_offload_trigger_info info = { 30 .fwnode = dev_fwnode(dev), 31 .ops = &adi_util_sigma_delta_ops, 32 }; 33 struct clk *clk; 34 35 clk = devm_clk_get_enabled(dev, NULL); 36 if (IS_ERR(clk)) 37 return dev_err_probe(dev, PTR_ERR(clk), "Failed to get clock\n"); 38 39 return devm_spi_offload_trigger_register(dev, &info); 40 } 41 42 static const struct of_device_id adi_util_sigma_delta_of_match_table[] = { 43 { .compatible = "adi,util-sigma-delta-spi", }, 44 { } 45 }; 46 MODULE_DEVICE_TABLE(of, adi_util_sigma_delta_of_match_table); 47 48 static struct platform_driver adi_util_sigma_delta_driver = { 49 .probe = adi_util_sigma_delta_probe, 50 .driver = { 51 .name = "adi-util-sigma-delta-spi", 52 .of_match_table = adi_util_sigma_delta_of_match_table, 53 }, 54 }; 55 module_platform_driver(adi_util_sigma_delta_driver); 56 57 MODULE_AUTHOR("David Lechner <dlechner@baylibre.com>"); 58 MODULE_DESCRIPTION("ADI Sigma-Delta SPI offload trigger utility driver"); 59 MODULE_LICENSE("GPL"); 60