From patchwork Mon Oct 28 21:45:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Angelo Dureghello X-Patchwork-Id: 13854202 Received: from mail.kernel-space.org (mail.kernel-space.org [195.201.34.187]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9A88F2022E4; Mon, 28 Oct 2024 21:53:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.201.34.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730152424; cv=none; b=YmnNSPQWSbqJf7Xx0gzDV9dun4yhJjaYWv+kLhMkZeXgBfZDvuFMZWFe9lyws7gX2uz7AFudXDZxjODsY/ZFYn7z+xu2zO5tpBgkbfkQGnN6RGUWz1ofiH6em1b/RIhrPCNawyVQ5VDYpcV7wI22UGvnsgvm0nlRLWXkt5yij3k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730152424; c=relaxed/simple; bh=I2hKyJkE5lSaVfqcBggLmA5y3mTRzqksloo07yQRvt0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WkVq/andulxHueD2zkfJb9bcZDvh6f8cekGAjk9UeUf5ahhx65LrnJycOY/3hnBefB1HC3ermyZ1KHNyBQdXU6Dk/gGl18MYRno/D+1Kv8rRHccQlj2UAKzZ8wenUmPO+SNJDK+fqHhjGGtmZ6sO2J+BUqtBLQYJTVV95TkS9rs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=kernel-space.org; spf=pass smtp.mailfrom=kernel-space.org; dkim=pass (1024-bit key) header.d=kernel-space.org header.i=@kernel-space.org header.b=awX9GHVn; dkim=pass (1024-bit key) header.d=kernel-space.org header.i=@kernel-space.org header.b=CP0KNCPG; arc=none smtp.client-ip=195.201.34.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=kernel-space.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel-space.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=kernel-space.org header.i=@kernel-space.org header.b="awX9GHVn"; dkim=pass (1024-bit key) header.d=kernel-space.org header.i=@kernel-space.org header.b="CP0KNCPG" Received: from kernel-space.org (localhost [127.0.0.1]) by kernel-space.org (OpenSMTPD) with ESMTP id 50ca30a9; Mon, 28 Oct 2024 21:37:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=kernel-space.org; h=from :date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; s=s1; bh=R8MBO+2epFIEbCb+wBXt5ALZP2A=; b=awX9GHVniE3FxTvAma pegi/b5wMpqKUzZNFyHsgJSa+yx7YvkMvVKSso8goj7H078ohko0QZeDe8b7iltU wo5jZsxdviKEg6CIlyzYQ8HMMvK0HZCVhwKPc1i9Xc3Gr7apUrzyhDWnPhL5iDUQ s6A+hDsup3eoSFlNzT6oMfPTM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=kernel-space.org; h=from :date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; q=dns; s=s1; b=HDFxYTN6ZCTrwaL4BySLmp3tCWbjfVeOIlc5HaCdurf8 ZxJ9v68tOtGSLBoatjKHlq/Z17hHcWy+DDBLH4OjmADwMd3kTMSZnld2TuY68X8o vg36SFd0J4LcyJY8qnjs+5j8HfCiOpL0yW0Hs4hcpWv/luozUY9KXgJY9hdNm48= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-space.org; s=s1; t=1730151474; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=tXD9nM+zJf+baf8I1HJHQEo8iyVRn909PphK3Jj4Bu4=; b=CP0KNCPGhgUiG829x1VOfQjoYZS8xdDoaDKDBqKCn/OdQRwMVf1mqKXdrwt6QLNJtZbIBT mjZHpM3fjS7XzHxE9KQWX1V0dV8Jpwt2l1z7ie/SxXemkCHu2MWuL9+UfubJZ79kaSQcxZ 2nfU/J5beqNYhGBLdGIAKSWNIKlv+iU= Received: from [127.0.1.1] (host-95-245-34-85.retail.telecomitalia.it [95.245.34.85]) by kernel-space.org (OpenSMTPD) with ESMTPSA id 62750122 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Mon, 28 Oct 2024 21:37:54 +0000 (UTC) From: Angelo Dureghello Date: Mon, 28 Oct 2024 22:45:30 +0100 Subject: [PATCH v9 3/8] iio: backend: extend features Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241028-wip-bl-ad3552r-axi-v0-iio-testing-v9-3-f6960b4f9719@kernel-space.org> References: <20241028-wip-bl-ad3552r-axi-v0-iio-testing-v9-0-f6960b4f9719@kernel-space.org> In-Reply-To: <20241028-wip-bl-ad3552r-axi-v0-iio-testing-v9-0-f6960b4f9719@kernel-space.org> To: Lars-Peter Clausen , Michael Hennerich , =?utf-8?q?Nuno_S=C3=A1?= , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Olivier Moysan Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, dlechner@baylibre.com, Mark Brown , Angelo Dureghello , Angelo Dureghello X-Mailer: b4 0.14.1 From: Angelo Dureghello Extend backend features with new calls needed later on this patchset from axi version of ad3552r. The follwoing calls are added: iio_backend_ddr_enable() enable ddr bus transfer iio_backend_ddr_disable() disable ddr bus transfer iio_backend_data_stream_enable() enable data stream over bus interface iio_backend_data_stream_disable() disable data stream over bus interface iio_backend_data_transfer_addr() define the target register address where the DAC sample will be written. Reviewed-by: Nuno Sa Signed-off-by: Angelo Dureghello --- drivers/iio/industrialio-backend.c | 78 ++++++++++++++++++++++++++++++++++++++ include/linux/iio/backend.h | 17 +++++++++ 2 files changed, 95 insertions(+) diff --git a/drivers/iio/industrialio-backend.c b/drivers/iio/industrialio-backend.c index 20b3b5212da7..81f3d24f0c50 100644 --- a/drivers/iio/industrialio-backend.c +++ b/drivers/iio/industrialio-backend.c @@ -718,6 +718,84 @@ static int __devm_iio_backend_get(struct device *dev, struct iio_backend *back) return 0; } +/** + * iio_backend_ddr_enable - Enable interface DDR (Double Data Rate) mode + * @back: Backend device + * + * Enable DDR, data is generated by the IP at each front (raising and falling) + * of the bus clock signal. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_ddr_enable(struct iio_backend *back) +{ + return iio_backend_op_call(back, ddr_enable); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_ddr_enable, IIO_BACKEND); + +/** + * iio_backend_ddr_disable - Disable interface DDR (Double Data Rate) mode + * @back: Backend device + * + * Disable DDR, setting into SDR mode (Single Data Rate). + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_ddr_disable(struct iio_backend *back) +{ + return iio_backend_op_call(back, ddr_disable); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_ddr_disable, IIO_BACKEND); + +/** + * iio_backend_data_stream_enable - Enable data stream + * @back: Backend device + * + * Enable data stream over the bus interface. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_stream_enable(struct iio_backend *back) +{ + return iio_backend_op_call(back, data_stream_enable); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_stream_enable, IIO_BACKEND); + +/** + * iio_backend_data_stream_disable - Disable data stream + * @back: Backend device + * + * Disable data stream over the bus interface. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_stream_disable(struct iio_backend *back) +{ + return iio_backend_op_call(back, data_stream_disable); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_stream_disable, IIO_BACKEND); + +/** + * iio_backend_data_transfer_addr - Set data address. + * @back: Backend device + * @address: Data register address + * + * Some devices may need to inform the backend about an address + * where to read or write the data. + * + * RETURNS: + * 0 on success, negative error number on failure. + */ +int iio_backend_data_transfer_addr(struct iio_backend *back, u32 address) +{ + return iio_backend_op_call(back, data_transfer_addr, address); +} +EXPORT_SYMBOL_NS_GPL(iio_backend_data_transfer_addr, IIO_BACKEND); + static struct iio_backend *__devm_iio_backend_fwnode_get(struct device *dev, const char *name, struct fwnode_handle *fwnode) { diff --git a/include/linux/iio/backend.h b/include/linux/iio/backend.h index 37d56914d485..10be00f3b120 100644 --- a/include/linux/iio/backend.h +++ b/include/linux/iio/backend.h @@ -14,12 +14,14 @@ struct iio_dev; enum iio_backend_data_type { IIO_BACKEND_TWOS_COMPLEMENT, IIO_BACKEND_OFFSET_BINARY, + IIO_BACKEND_DATA_UNSIGNED, IIO_BACKEND_DATA_TYPE_MAX }; enum iio_backend_data_source { IIO_BACKEND_INTERNAL_CONTINUOUS_WAVE, IIO_BACKEND_EXTERNAL, + IIO_BACKEND_INTERNAL_RAMP_16BIT, IIO_BACKEND_DATA_SOURCE_MAX }; @@ -89,6 +91,11 @@ enum iio_backend_sample_trigger { * @read_raw: Read a channel attribute from a backend device * @debugfs_print_chan_status: Print channel status into a buffer. * @debugfs_reg_access: Read or write register value of backend. + * @ddr_enable: Enable interface DDR (Double Data Rate) mode. + * @ddr_disable: Disable interface DDR (Double Data Rate) mode. + * @data_stream_enable: Enable data stream. + * @data_stream_disable: Disable data stream. + * @data_transfer_addr: Set data address. **/ struct iio_backend_ops { int (*enable)(struct iio_backend *back); @@ -129,6 +136,11 @@ struct iio_backend_ops { size_t len); int (*debugfs_reg_access)(struct iio_backend *back, unsigned int reg, unsigned int writeval, unsigned int *readval); + int (*ddr_enable)(struct iio_backend *back); + int (*ddr_disable)(struct iio_backend *back); + int (*data_stream_enable)(struct iio_backend *back); + int (*data_stream_disable)(struct iio_backend *back); + int (*data_transfer_addr)(struct iio_backend *back, u32 address); }; /** @@ -164,6 +176,11 @@ int iio_backend_data_sample_trigger(struct iio_backend *back, int devm_iio_backend_request_buffer(struct device *dev, struct iio_backend *back, struct iio_dev *indio_dev); +int iio_backend_ddr_enable(struct iio_backend *back); +int iio_backend_ddr_disable(struct iio_backend *back); +int iio_backend_data_stream_enable(struct iio_backend *back); +int iio_backend_data_stream_disable(struct iio_backend *back); +int iio_backend_data_transfer_addr(struct iio_backend *back, u32 address); ssize_t iio_backend_ext_info_set(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, const char *buf, size_t len);