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Fri, 27 Jun 2025 16:41:34 -0700 (PDT) Received: from [127.0.1.1] ([2600:8803:e7e4:1d00:1715:453e:e133:7d6]) by smtp.gmail.com with ESMTPSA id 5614622812f47-40b322ae4e9sm568483b6e.17.2025.06.27.16.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Jun 2025 16:41:34 -0700 (PDT) From: David Lechner Date: Fri, 27 Jun 2025 18:40:05 -0500 Subject: [PATCH v2 09/11] spi: offload trigger: add ADI Util Sigma-Delta SPI driver Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250627-iio-adc-ad7173-add-spi-offload-support-v2-9-f49c55599113@baylibre.com> References: <20250627-iio-adc-ad7173-add-spi-offload-support-v2-0-f49c55599113@baylibre.com> In-Reply-To: <20250627-iio-adc-ad7173-add-spi-offload-support-v2-0-f49c55599113@baylibre.com> To: Michael Hennerich , Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mark Brown Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4261; i=dlechner@baylibre.com; h=from:subject:message-id; bh=BwOGbOpYX21Ucam+bloAQXE+MG2uw4doa1iKJcVx3E8=; b=owEBbQGS/pANAwAKAcLMIAH/AY/AAcsmYgBoXywO9aGuRzF5vZuZtzDPnjeRPdxcPRyFFJxjK NlFurig58GJATMEAAEKAB0WIQTsGNmeYg6D1pzYaJjCzCAB/wGPwAUCaF8sDgAKCRDCzCAB/wGP wHMsCACKqyWrzMOsC8J5fk7Tjyev2WUWNBJmCTjLk25r/rQxhS05JnWztTWyRiBqtesqo8Ub+Hb 3qRXEdJ2zomGRifijM+qMaWUhsacJcEhp3xiw3v4iRQqaK7mey8O0iiSCtn+IdoSMOtGZOyLwWp HmSIZeVchs9mm7uj1y/quAqG84lhy2/XFMt8PqIt/tgyYTQ51LRxwS0m+Zhn4TFFEvKhlHG5VgU BkZXbhK40UXIdhSJm/9jv4GSkqQ3Ht3koU/9aElpGYUZQ7u3QUBnvMfwLxM6HGZk6y3JPEyH5OF iLoi4pDCoMM5Jt1Kp0yXeCtvQxR3y4FH+2kukwenYQlXtUxe X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 Add a new driver for the ADI Util Sigma-Delta SPI FPGA IP core. This is used to trigger a SPI offload based on a RDY signal from an ADC while masking out other signals on the same line. Signed-off-by: David Lechner --- MAINTAINERS | 2 +- drivers/spi/Kconfig | 5 ++ drivers/spi/Makefile | 1 + .../spi/spi-offload-trigger-adi-util-sigma-delta.c | 59 ++++++++++++++++++++++ 4 files changed, 66 insertions(+), 1 deletion(-) diff --git a/MAINTAINERS b/MAINTAINERS index 60ba572be7f5b48c0ab1d0d9724e19e335e8761b..4ed4977deb6ddc545be39b5c1d5e9959e9fe64cf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23357,7 +23357,7 @@ F: include/linux/mtd/spi-nor.h SPI OFFLOAD R: David Lechner -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 c51da3fc3604977b05388687e5e64a58370186c4..e69f060d3875c168a2dc701a372e47b8ffd33268 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 4ea89f6fc531625060255ecff237470927e1f041..51f9f16ed734424ff10672a04f2ec166dc637e0b 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 0000000000000000000000000000000000000000..035d088d4d33d6d32146a340381bb167f080e085 --- /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 +#include +#include +#include +#include +#include +#include + +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 "); +MODULE_DESCRIPTION("ADI Sigma-Delta SPI offload trigger utility driver"); +MODULE_LICENSE("GPL"); -- 2.43.0