From patchwork Mon Mar 8 14:54:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Ardelean X-Patchwork-Id: 396462 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6891C4360C for ; Mon, 8 Mar 2021 14:56:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BED5F650E6 for ; Mon, 8 Mar 2021 14:56:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231250AbhCHOzl (ORCPT ); Mon, 8 Mar 2021 09:55:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231283AbhCHOzf (ORCPT ); Mon, 8 Mar 2021 09:55:35 -0500 Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49500C061760 for ; Mon, 8 Mar 2021 06:55:35 -0800 (PST) Received: by mail-ed1-x52c.google.com with SMTP id m9so15136276edd.5 for ; Mon, 08 Mar 2021 06:55:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=deviqon.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Io9v2GBIlHI+Tmp+Muo2ozOuxnB5JlN/m/peVkSOoQk=; b=KN8oqTz03n4iXKtuJ5qi9J7eiFCSjzNROABDY6Gb/MplICzu3i5V03YptgmpTTumx9 qzHGrgq8fs8JGet9Odv3isiqA2BAEwaSruGVQmS9a+mZpNXFpeE4VcGYKpq2SjITIXEr iZu8cMKqFXc0GNaf9S/tP3IfDJqMyEWVlwbxUYbisZoe8tFawpRpLzcdVzwhbtNF+qfh oh5qVIsYJBFymQreVC72K8pfrXlBDUp9vpAjjD5DhQNe9vKsYc0LarvZp9YPPAvTNQ6k bUkDxp4231M2aHh4lz1mTKmik9470JWb/d4AGTx8NT+lMZyzE4h4Q/QHCx3Q8heZ+6Wu Pn4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Io9v2GBIlHI+Tmp+Muo2ozOuxnB5JlN/m/peVkSOoQk=; b=l5FwoVg0j6v3/HnTGLA4FUw5p7PXWmyhJntISb7kOfEhDWvEeyA1quiIdmFEWOT5rf c0RJrTaxENua6X+3RxChoqvy3hUy99ova+AzIkYSo35VT/bEeY2eMrHNZ5EGoDnGQWqa kM5KAHYUbPe+7PFvKOsYSKWNucvH21E1mzcOtLGHpqOcfgueXYdBTVgH+JxU5TzUVUNo w0c87gFr9jetD7HCD1K8UR3E6sfJ4uy1xZsmto6br99GoxRijN1IkGAXohu5/1MuevcA ekg42uP8yFcM2lmcOnUlvUsfRGWCMTIxcczMQZbNSh0BQ68uh8wY3QD2Zj3PcDZzJkH8 hCig== X-Gm-Message-State: AOAM5309YEKev0nPKOc/lmrWizgw6gdo4xik2C5Rl2zb5eakQE8zP9zA BdairIELvYIuyBeXoRJM0I44Las1sE7G8lxD X-Google-Smtp-Source: ABdhPJzOxDsiKTJZFzssNH71mhV3dmH3qpwIBVJVNeEVFcuravA0h+m9Fy72NPjkwyy5NAtefvkZcw== X-Received: by 2002:a05:6402:2076:: with SMTP id bd22mr22161922edb.378.1615215333831; Mon, 08 Mar 2021 06:55:33 -0800 (PST) Received: from localhost.localdomain ([5.2.193.191]) by smtp.gmail.com with ESMTPSA id bt14sm7411234edb.92.2021.03.08.06.55.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Mar 2021 06:55:33 -0800 (PST) From: Alexandru Ardelean To: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, greybus-dev@lists.linaro.org, devel@driverdev.osuosl.org, linux-tegra@vger.kernel.org, bcm-kernel-feedback-list@broadcom.com Cc: broonie@kernel.org, gregkh@linuxfoundation.org, elder@kernel.org, johan@kernel.org, vireshk@kernel.org, rmfrfs@gmail.com, f.fainelli@gmail.com, ldewangan@nvidia.com, thierry.reding@gmail.com, jonathanh@nvidia.com, linux@deviqon.com, Alexandru Ardelean Subject: [PATCH 06/10] staging: greybus: spilib: use 'spi_delay_to_ns' for getting xfer delay Date: Mon, 8 Mar 2021 16:54:58 +0200 Message-Id: <20210308145502.1075689-7-aardelean@deviqon.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210308145502.1075689-1-aardelean@deviqon.com> References: <20210308145502.1075689-1-aardelean@deviqon.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The intent is the removal of the 'delay_usecs' field from the spi_transfer struct, as there is a 'delay' field that does the same thing. The spi_delay_to_ns() can be used to get the transfer delay. It works by using the 'delay_usecs' field first (if it is non-zero), and finally uses the 'delay' field. Since the 'delay_usecs' field is going away, this change makes use of the spi_delay_to_ns() function. This also means dividing the return value of the function by 1000, to convert it to microseconds. To prevent any potential faults when converting to microseconds and since the result of spi_delay_to_ns() is int, the delay is being computed in 32 bits and then clamped between 0 & U16_MAX. Signed-off-by: Alexandru Ardelean --- drivers/staging/greybus/spilib.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/staging/greybus/spilib.c b/drivers/staging/greybus/spilib.c index 672d540d3365..30655153df6a 100644 --- a/drivers/staging/greybus/spilib.c +++ b/drivers/staging/greybus/spilib.c @@ -245,6 +245,7 @@ static struct gb_operation *gb_spi_operation_create(struct gb_spilib *spi, /* Fill in the transfers array */ xfer = spi->first_xfer; while (msg->state != GB_SPI_STATE_OP_DONE) { + int xfer_delay; if (xfer == spi->last_xfer) xfer_len = spi->last_xfer_size; else @@ -259,7 +260,9 @@ static struct gb_operation *gb_spi_operation_create(struct gb_spilib *spi, gb_xfer->speed_hz = cpu_to_le32(xfer->speed_hz); gb_xfer->len = cpu_to_le32(xfer_len); - gb_xfer->delay_usecs = cpu_to_le16(xfer->delay_usecs); + xfer_delay = spi_delay_to_ns(&xfer->delay, xfer) / 1000; + xfer_delay = clamp_t(u16, xfer_delay, 0, U16_MAX); + gb_xfer->delay_usecs = cpu_to_le16(xfer_delay); gb_xfer->cs_change = xfer->cs_change; gb_xfer->bits_per_word = xfer->bits_per_word;