diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/spi/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/spi/Makefile | 1 | ||||
| -rw-r--r-- | drivers/spi/spi-offload-trigger-adi-util-sigma-delta.c | 59 |
4 files changed, 66 insertions, 1 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index d7b5e8572279..d0d5b822a1f7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23413,7 +23413,7 @@ F: include/linux/mtd/spi-nor.h SPI OFFLOAD R: David Lechner <dlechner@baylibre.com> -F: drivers/spi/spi-offload-trigger-pwm.c +F: drivers/spi/spi-offload-trigger-*.c F: drivers/spi/spi-offload.c F: include/linux/spi/offload/ K: spi_offload diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index c51da3fc3604..e69f060d3875 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -1355,6 +1355,11 @@ if SPI_OFFLOAD comment "SPI Offload triggers" +config SPI_OFFLOAD_TRIGGER_ADI_UTIL_SD + tristate "SPI offload trigger using ADI sigma-delta utility" + help + SPI offload trigger from ADI sigma-delta utility FPGA IP block. + config SPI_OFFLOAD_TRIGGER_PWM tristate "SPI offload trigger using PWM" depends on PWM diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 4ea89f6fc531..51f9f16ed734 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -170,3 +170,4 @@ obj-$(CONFIG_SPI_SLAVE_SYSTEM_CONTROL) += spi-slave-system-control.o # SPI offload triggers obj-$(CONFIG_SPI_OFFLOAD_TRIGGER_PWM) += spi-offload-trigger-pwm.o +obj-$(CONFIG_SPI_OFFLOAD_TRIGGER_ADI_UTIL_SD) += spi-offload-trigger-adi-util-sigma-delta.o diff --git a/drivers/spi/spi-offload-trigger-adi-util-sigma-delta.c b/drivers/spi/spi-offload-trigger-adi-util-sigma-delta.c new file mode 100644 index 000000000000..035d088d4d33 --- /dev/null +++ b/drivers/spi/spi-offload-trigger-adi-util-sigma-delta.c @@ -0,0 +1,59 @@ +// 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"); |