From patchwork Mon Jul 29 14:20:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Herve Codina X-Patchwork-Id: 13745060 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 857FCC3DA4A for ; Mon, 29 Jul 2024 14:32:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Uj6MLd6KFTJCdXGfBKX12l8E7lzam+wSv5WhfHx4wCU=; b=0pttUHn4wWNz5optgLjPyv+svY 5cZpVixNt9QSleUX7prwe6Lw4+FpnxAxmA2j/wiWuQtH1PUGv8L2ur8yopDyK01Zbcs/zN6YE9UAD lNithHlPLD7Ok18wtuQEmd3sXABLTa63CROaGZAa4iQ8+8ni7GVhQFkywTtPn9KsFdafuMlX3D3ZE 1t4v5LXuXgsNmcglcIGHcbaL/QBynWnWSDG2rpaXNRLoZn5hLl49dqhfxw8b/x4p4FLgBfs1jhTn/ RD+hSHmJutw79Y50cNZzburZQ098Fdtd7vykhWwMddlxuK92zznmEKMe0iSK+zebsgu6Rw+xzPcQV XCehAkRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRQV-0000000Bcm1-1csh; Mon, 29 Jul 2024 14:32:39 +0000 Received: from relay1-d.mail.gandi.net ([2001:4b98:dc4:8::221]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYRFm-0000000BXmd-3c38 for linux-arm-kernel@lists.infradead.org; Mon, 29 Jul 2024 14:21:36 +0000 Received: by mail.gandi.net (Postfix) with ESMTPA id AD7E5240010; Mon, 29 Jul 2024 14:21:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1722262893; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Uj6MLd6KFTJCdXGfBKX12l8E7lzam+wSv5WhfHx4wCU=; b=CoM3pBGPJ2hyuxKCH6UPNV4MzbNI4KL9bdDsGxLzw5Tk1ZR+/UwTgNyQ68LaeOlFRKnuIU bywjgvAHJ5GeI7F9kJbQawakP+91s+xfgqH9UaBmjduPW+ekfXg14jvbk353EYZ6nWYWbJ JsyfLrfMQvlrrKnl19XlY3xel3cF5ejTTCco28hwUD2tDah7ApqNcTIam3E/k6QNbVAe8G fV7pDjgrOeA/sUd/ovnnqoimE40ORu/Z8Ge32Umz6vQe2Kdg2riFHtRE+5XdhdfK6FrZPL h/aW/CK3977AwoTHnuB0JvwqgG6HrUdJX+1u67zEsfiKrFLsP8Q/xzTKka2WAA== From: Herve Codina To: Herve Codina , Christophe Leroy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Qiang Zhao , Li Yang , Mark Brown Cc: linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni Subject: [PATCH v1 25/36] soc: fsl: cpm1: qmc: Re-order probe() operations Date: Mon, 29 Jul 2024 16:20:54 +0200 Message-ID: <20240729142107.104574-26-herve.codina@bootlin.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240729142107.104574-1-herve.codina@bootlin.com> References: <20240729142107.104574-1-herve.codina@bootlin.com> MIME-Version: 1.0 X-GND-Sasl: herve.codina@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240729_072135_237152_92546703 X-CRM114-Status: GOOD ( 16.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Current code handles CPM1 version of QMC. In the QUICC Engine (QE) version, some operations done at probe() need to be done in a different order. In order to prepare the support for the QE version, changed the sequence of operation done at probe(): - Retrieve the tsa_serial earlier, before initializing resources. - Group SCC initialisation and do this initialization when it is really needed in the probe() sequence. Having the QE compatible sequence in the CPM1 version does not lead to any issue and works correctly without any regressions. Signed-off-by: Herve Codina --- drivers/soc/fsl/qe/qmc.c | 54 +++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 28 deletions(-) diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c index 85fc86f91806..8dd0f8fc7b08 100644 --- a/drivers/soc/fsl/qe/qmc.c +++ b/drivers/soc/fsl/qe/qmc.c @@ -1614,6 +1614,12 @@ static int qmc_probe(struct platform_device *pdev) } INIT_LIST_HEAD(&qmc->chan_head); + qmc->tsa_serial = devm_tsa_serial_get_byphandle(qmc->dev, np, "fsl,tsa-serial"); + if (IS_ERR(qmc->tsa_serial)) { + return dev_err_probe(qmc->dev, PTR_ERR(qmc->tsa_serial), + "Failed to get TSA serial\n"); + } + qmc->scc_regs = devm_platform_ioremap_resource_byname(pdev, "scc_regs"); if (IS_ERR(qmc->scc_regs)) return PTR_ERR(qmc->scc_regs); @@ -1630,33 +1636,13 @@ static int qmc_probe(struct platform_device *pdev) if (IS_ERR(qmc->dpram)) return PTR_ERR(qmc->dpram); - qmc->tsa_serial = devm_tsa_serial_get_byphandle(qmc->dev, np, "fsl,tsa-serial"); - if (IS_ERR(qmc->tsa_serial)) { - return dev_err_probe(qmc->dev, PTR_ERR(qmc->tsa_serial), - "Failed to get TSA serial\n"); - } - - /* Connect the serial (SCC) to TSA */ - ret = tsa_serial_connect(qmc->tsa_serial); - if (ret) { - dev_err(qmc->dev, "Failed to connect TSA serial\n"); - return ret; - } - /* Parse channels informationss */ ret = qmc_of_parse_chans(qmc, np); if (ret) - goto err_tsa_serial_disconnect; + return ret; nb_chans = qmc_nb_chans(qmc); - /* Init GMSR_H and GMSR_L registers */ - qmc_write32(qmc->scc_regs + SCC_GSMRH, - SCC_GSMRH_CDS | SCC_GSMRH_CTSS | SCC_GSMRH_CDP | SCC_GSMRH_CTSP); - - /* enable QMC mode */ - qmc_write32(qmc->scc_regs + SCC_GSMRL, SCC_GSMRL_MODE_QMC); - /* * Allocate the buffer descriptor table * 8 rx and 8 tx descriptors per channel @@ -1666,8 +1652,7 @@ static int qmc_probe(struct platform_device *pdev) &qmc->bd_dma_addr, GFP_KERNEL); if (!qmc->bd_table) { dev_err(qmc->dev, "Failed to allocate bd table\n"); - ret = -ENOMEM; - goto err_tsa_serial_disconnect; + return -ENOMEM; } memset(qmc->bd_table, 0, qmc->bd_size); @@ -1679,8 +1664,7 @@ static int qmc_probe(struct platform_device *pdev) &qmc->int_dma_addr, GFP_KERNEL); if (!qmc->int_table) { dev_err(qmc->dev, "Failed to allocate interrupt table\n"); - ret = -ENOMEM; - goto err_tsa_serial_disconnect; + return -ENOMEM; } memset(qmc->int_table, 0, qmc->int_size); @@ -1699,18 +1683,32 @@ static int qmc_probe(struct platform_device *pdev) ret = qmc_init_tsa(qmc); if (ret) - goto err_tsa_serial_disconnect; + return ret; qmc_write16(qmc->scc_pram + QMC_GBL_QMCSTATE, 0x8000); ret = qmc_setup_chans(qmc); if (ret) - goto err_tsa_serial_disconnect; + return ret; /* Init interrupts table */ ret = qmc_setup_ints(qmc); if (ret) - goto err_tsa_serial_disconnect; + return ret; + + /* Connect the serial (SCC) to TSA */ + ret = tsa_serial_connect(qmc->tsa_serial); + if (ret) { + dev_err(qmc->dev, "Failed to connect TSA serial\n"); + return ret; + } + + /* Init GMSR_H and GMSR_L registers */ + qmc_write32(qmc->scc_regs + SCC_GSMRH, + SCC_GSMRH_CDS | SCC_GSMRH_CTSS | SCC_GSMRH_CDP | SCC_GSMRH_CTSP); + + /* enable QMC mode */ + qmc_write32(qmc->scc_regs + SCC_GSMRL, SCC_GSMRL_MODE_QMC); /* Disable and clear interrupts, set the irq handler */ qmc_write16(qmc->scc_regs + SCC_SCCM, 0x0000);