From patchwork Mon Sep 9 08:10:39 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Shubin via B4 Relay X-Patchwork-Id: 826883 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 38F761B150C; Mon, 9 Sep 2024 08:12:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725869536; cv=none; b=Y87UwZ14B0nsVEHEMgzGlUPVAWo52IL8GOCQOoD5CHEoIOzL6ERvQCpjuvyane+wp6qzk2reXhbDKFTjKLE5XiCjrs2wjWoKV4Jn548zS99PhYNXj5BXJsOl+zNb5Epa/b327tmbYNBXcRIG202cZjVTBDmEzwFVYtSG1ybKA78= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725869536; c=relaxed/simple; bh=DG6Gyo/AhYeDkc08pgAbNNL+jl66p9ctVC7NLxEKR68=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=LyggdvgU7Pv2ks22HM80PYbGHhC9Pm4AjvO9wWFzBEsa0uHEtqvGZc9WjhTgVcHXJSGprxzFtmXErh6XvOPAksweniY03P7PBbHh/GYTXYZzeK4FESOtc4y84xU2gTCJkmrmiVVu+XFmLbtpB3F9O4M6Dgm97Y4Ari0pT84YMWw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AiQgFJxA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="AiQgFJxA" Received: by smtp.kernel.org (Postfix) with ESMTPS id 16A79C4CEEB; Mon, 9 Sep 2024 08:12:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1725869536; bh=DG6Gyo/AhYeDkc08pgAbNNL+jl66p9ctVC7NLxEKR68=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=AiQgFJxAug3Sy6r0LjlUSqNk0GnYGxM8hV9HaC0jth5Vo7s62o0aOEJ6J2WUDIICb egWk9bfhnpXWhNfJlOefyn3/R/EdKcLessu3wrbUkxehQorZjt4/ecYTSLYK7DHJqt 3fHOQcUKxsrZjK0kZVdyuXJD/fHr148B931PEQvC3AdLqa1M2+5gsU573h1+SjJ1hZ 86OFI7abmOKmQpIL+EiggBTz4UFZAHk/g6GFrgAD5epo8uDT5LzgYStfD+llmOnNPx L5qLqiVLWeQbvNhM6iLdF1U2cOk/UukPtFlunW7z6FXcAHWI3uJYfM459QTcXcCheR sHJI2O/s0YzkA== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0FD29ECE57F; Mon, 9 Sep 2024 08:12:16 +0000 (UTC) From: Nikita Shubin via B4 Relay Date: Mon, 09 Sep 2024 11:10:39 +0300 Subject: [PATCH v12 14/38] dt-bindings: spi: Add Cirrus EP93xx Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240909-ep93xx-v12-14-e86ab2423d4b@maquefel.me> References: <20240909-ep93xx-v12-0-e86ab2423d4b@maquefel.me> In-Reply-To: <20240909-ep93xx-v12-0-e86ab2423d4b@maquefel.me> To: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Sverdlin , Nikita Shubin Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Krzysztof Kozlowski X-Mailer: b4 0.13-dev-e3e53 X-Developer-Signature: v=1; a=ed25519-sha256; t=1725869532; l=2297; i=nikita.shubin@maquefel.me; s=20230718; h=from:subject:message-id; bh=jJL2qB0kTVm0ECXQdY2vGGR9TsGC8ONTPNp8ZLPMM2E=; b=TLRu4+Bg6JWRqqSa9yZN5XhB7rf3NCSVopk1URawM8NDcXUxHexwsRMJhMs5ZjCbFqStoETRkjTb dWVqMWwICRRHE9palsPIONgXZxqUyTJvH2Y45Ig/XbL791vjkqjN X-Developer-Key: i=nikita.shubin@maquefel.me; a=ed25519; pk=vqf5YIUJ7BJv3EJFaNNxWZgGuMgDH6rwufTLflwU9ac= X-Endpoint-Received: by B4 Relay for nikita.shubin@maquefel.me/20230718 with auth_id=65 X-Original-From: Nikita Shubin Reply-To: nikita.shubin@maquefel.me From: Nikita Shubin Add YAML bindings for ep93xx SoC SPI. Signed-off-by: Nikita Shubin Reviewed-by: Krzysztof Kozlowski Reviewed-by: Mark Brown --- .../devicetree/bindings/spi/cirrus,ep9301-spi.yaml | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/cirrus,ep9301-spi.yaml b/Documentation/devicetree/bindings/spi/cirrus,ep9301-spi.yaml new file mode 100644 index 000000000000..73980a27dc00 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/cirrus,ep9301-spi.yaml @@ -0,0 +1,70 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/cirrus,ep9301-spi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: EP93xx SoC SPI controller + +maintainers: + - Alexander Sverdlin + - Nikita Shubin + +allOf: + - $ref: spi-controller.yaml# + +properties: + compatible: + oneOf: + - const: cirrus,ep9301-spi + - items: + - enum: + - cirrus,ep9302-spi + - cirrus,ep9307-spi + - cirrus,ep9312-spi + - cirrus,ep9315-spi + - const: cirrus,ep9301-spi + + reg: + items: + - description: SPI registers region + + interrupts: + maxItems: 1 + + clocks: + items: + - description: SPI Controller reference clock source + + dmas: + items: + - description: rx DMA channel + - description: tx DMA channel + + dma-names: + items: + - const: rx + - const: tx + +required: + - compatible + - reg + - interrupts + - clocks + +unevaluatedProperties: false + +examples: + - | + #include + #include + spi@808a0000 { + compatible = "cirrus,ep9301-spi"; + reg = <0x808a0000 0x18>; + interrupt-parent = <&vic1>; + interrupts = <21>; + clocks = <&syscon EP93XX_CLK_SPI>; + dmas = <&dma1 10 2>, <&dma1 10 1>; + dma-names = "rx", "tx"; + cs-gpios = <&gpio5 2 GPIO_ACTIVE_HIGH>; + }; From patchwork Mon Sep 9 08:10:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nikita Shubin via B4 Relay X-Patchwork-Id: 828122 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 702921B1D67; Mon, 9 Sep 2024 08:12:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725869536; cv=none; b=Pc2E9a/lnG5NoRZmAV452Hfj7xmh1eUGntOlLkMNmM8qAk7JMjkKpNa4UkW7hMmX90wA9iIeGiWFalSD1IrM3LduquGj43qlRvcWAI64EKP+QqPHZrTF0pItDT+YGkBjKYxO4arMVfmWdxrpjmjioBKxrMQUuyRSi7ZaJS/Y1ss= ARC-Message-Signature: i=1; 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b=Q5tUmG+afB3mEmbuNTviAg4HIQPX3Q6faFfBBF8zpf3O1QeYepxvSzsK8Oh1fCDNu Zl6+esDd9hsDNw2i+8GUUFxySlWQFkB1P4jyBRh5qwTkf+n5PMJrSMX3z7XPBH7NjT MGSkhn7pmLWH/Gx8KFWsA4tokafX6ApXH8moCQglOWBur5iXrqa5FoOo01Y6HZTnHh FCobix02ltVycSkmY+OWa9JwnGnWsfe1FTlttLOZ2NQGufDRoIkHEGtGWC1RmhlWQv VgdLVskXppXpZ/TdUVgRbJ39hvKPgjWKJi6j/Q3Ux06pOnET6bpD5kWeeAuzz1pMk6 wkutqc3m6nq8g== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1BE85ECE57B; Mon, 9 Sep 2024 08:12:16 +0000 (UTC) From: Nikita Shubin via B4 Relay Date: Mon, 09 Sep 2024 11:10:40 +0300 Subject: [PATCH v12 15/38] spi: ep93xx: add DT support for Cirrus EP93xx Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240909-ep93xx-v12-15-e86ab2423d4b@maquefel.me> References: <20240909-ep93xx-v12-0-e86ab2423d4b@maquefel.me> In-Reply-To: <20240909-ep93xx-v12-0-e86ab2423d4b@maquefel.me> To: Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13-dev-e3e53 X-Developer-Signature: v=1; a=ed25519-sha256; t=1725869532; l=4901; i=nikita.shubin@maquefel.me; s=20230718; h=from:subject:message-id; bh=Bt1o2cb87iUEqTTj1qSqH0uuj7VeyHE3n45reTOPXeo=; b=1VYjvnjJH6okrE6wEjnwIj7YQRRmQ45+bs92ol5MesEKoFVrHZMB9Pv+XfDebisamnsZGEuQdfTw C/CmuWIgD31dF9O+3IBuk1+D6VQ6pjvic7cY5XQ1NDLSj3LbumNE X-Developer-Key: i=nikita.shubin@maquefel.me; a=ed25519; pk=vqf5YIUJ7BJv3EJFaNNxWZgGuMgDH6rwufTLflwU9ac= X-Endpoint-Received: by B4 Relay for nikita.shubin@maquefel.me/20230718 with auth_id=65 X-Original-From: Nikita Shubin Reply-To: nikita.shubin@maquefel.me From: Nikita Shubin - add OF ID match table - add device tree DMA request, so we can probe defer, in case DMA is not ready yet - drop DMA platform code Signed-off-by: Nikita Shubin Reviewed-by: Linus Walleij Tested-by: Alexander Sverdlin Acked-by: Alexander Sverdlin Reviewed-by: Mark Brown --- drivers/spi/spi-ep93xx.c | 66 +++++++++++++++++------------------------------- 1 file changed, 23 insertions(+), 43 deletions(-) diff --git a/drivers/spi/spi-ep93xx.c b/drivers/spi/spi-ep93xx.c index a1d60e51c053..ffbe0d522bce 100644 --- a/drivers/spi/spi-ep93xx.c +++ b/drivers/spi/spi-ep93xx.c @@ -18,18 +18,18 @@ #include #include #include +#include +#include #include #include #include #include +#include #include #include #include #include -#include -#include - #define SSPCR0 0x0000 #define SSPCR0_SPO BIT(6) #define SSPCR0_SPH BIT(7) @@ -92,8 +92,6 @@ struct ep93xx_spi { size_t fifo_level; struct dma_chan *dma_rx; struct dma_chan *dma_tx; - struct ep93xx_dma_data dma_rx_data; - struct ep93xx_dma_data dma_tx_data; struct sg_table rx_sgt; struct sg_table tx_sgt; void *zeropage; @@ -575,46 +573,23 @@ static int ep93xx_spi_unprepare_hardware(struct spi_controller *host) return 0; } -static bool ep93xx_spi_dma_filter(struct dma_chan *chan, void *filter_param) +static int ep93xx_spi_setup_dma(struct device *dev, struct ep93xx_spi *espi) { - if (ep93xx_dma_chan_is_m2p(chan)) - return false; - - chan->private = filter_param; - return true; -} - -static int ep93xx_spi_setup_dma(struct ep93xx_spi *espi) -{ - dma_cap_mask_t mask; int ret; espi->zeropage = (void *)get_zeroed_page(GFP_KERNEL); if (!espi->zeropage) return -ENOMEM; - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - espi->dma_rx_data.port = EP93XX_DMA_SSP; - espi->dma_rx_data.direction = DMA_DEV_TO_MEM; - espi->dma_rx_data.name = "ep93xx-spi-rx"; - - espi->dma_rx = dma_request_channel(mask, ep93xx_spi_dma_filter, - &espi->dma_rx_data); - if (!espi->dma_rx) { - ret = -ENODEV; + espi->dma_rx = dma_request_chan(dev, "rx"); + if (IS_ERR(espi->dma_rx)) { + ret = dev_err_probe(dev, PTR_ERR(espi->dma_rx), "rx DMA setup failed"); goto fail_free_page; } - espi->dma_tx_data.port = EP93XX_DMA_SSP; - espi->dma_tx_data.direction = DMA_MEM_TO_DEV; - espi->dma_tx_data.name = "ep93xx-spi-tx"; - - espi->dma_tx = dma_request_channel(mask, ep93xx_spi_dma_filter, - &espi->dma_tx_data); - if (!espi->dma_tx) { - ret = -ENODEV; + espi->dma_tx = dma_request_chan(dev, "tx"); + if (IS_ERR(espi->dma_tx)) { + ret = dev_err_probe(dev, PTR_ERR(espi->dma_tx), "tx DMA setup failed"); goto fail_release_rx; } @@ -647,18 +622,11 @@ static void ep93xx_spi_release_dma(struct ep93xx_spi *espi) static int ep93xx_spi_probe(struct platform_device *pdev) { struct spi_controller *host; - struct ep93xx_spi_info *info; struct ep93xx_spi *espi; struct resource *res; int irq; int error; - info = dev_get_platdata(&pdev->dev); - if (!info) { - dev_err(&pdev->dev, "missing platform data\n"); - return -EINVAL; - } - irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; @@ -713,12 +681,17 @@ static int ep93xx_spi_probe(struct platform_device *pdev) goto fail_release_host; } - if (info->use_dma && ep93xx_spi_setup_dma(espi)) + error = ep93xx_spi_setup_dma(&pdev->dev, espi); + if (error == -EPROBE_DEFER) + goto fail_release_host; + + if (error) dev_warn(&pdev->dev, "DMA setup failed. Falling back to PIO\n"); /* make sure that the hardware is disabled */ writel(0, espi->mmio + SSPCR1); + device_set_node(&host->dev, dev_fwnode(&pdev->dev)); error = devm_spi_register_controller(&pdev->dev, host); if (error) { dev_err(&pdev->dev, "failed to register SPI host\n"); @@ -746,9 +719,16 @@ static void ep93xx_spi_remove(struct platform_device *pdev) ep93xx_spi_release_dma(espi); } +static const struct of_device_id ep93xx_spi_of_ids[] = { + { .compatible = "cirrus,ep9301-spi" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ep93xx_spi_of_ids); + static struct platform_driver ep93xx_spi_driver = { .driver = { .name = "ep93xx-spi", + .of_match_table = ep93xx_spi_of_ids, }, .probe = ep93xx_spi_probe, .remove_new = ep93xx_spi_remove,