From patchwork Mon Mar 7 06:52:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leilk Liu X-Patchwork-Id: 12771257 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CE562C4167B for ; Mon, 7 Mar 2022 06:52:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235692AbiCGGxp (ORCPT ); Mon, 7 Mar 2022 01:53:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234872AbiCGGxk (ORCPT ); Mon, 7 Mar 2022 01:53:40 -0500 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 72DFB1FCEB; Sun, 6 Mar 2022 22:52:45 -0800 (PST) X-UUID: 5d3aaacd6a2f4934a8126380694a1089-20220307 X-UUID: 5d3aaacd6a2f4934a8126380694a1089-20220307 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 719419815; Mon, 07 Mar 2022 14:52:39 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 7 Mar 2022 14:52:39 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 7 Mar 2022 14:52:38 +0800 From: Leilk Liu To: Mark Brown CC: Rob Herring , Matthias Brugger , , , , , , Leilk Liu Subject: [PATCH V3 7/7] spi: mediatek: support spi-hclk Date: Mon, 7 Mar 2022 14:52:30 +0800 Message-ID: <20220307065230.12655-8-leilk.liu@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220307065230.12655-1-leilk.liu@mediatek.com> References: <20220307065230.12655-1-leilk.liu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org this patch adds spi-hclk support. Signed-off-by: Leilk Liu --- drivers/spi/spi-mt65xx.c | 85 ++++++++++++++++++++++++++++++++-------- 1 file changed, 69 insertions(+), 16 deletions(-) diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c index 2f09b9d7a998..902013ec1223 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -132,7 +132,7 @@ struct mtk_spi { u32 state; int pad_num; u32 *pad_sel; - struct clk *parent_clk, *sel_clk, *spi_clk; + struct clk *parent_clk, *sel_clk, *spi_clk, *spi_hclk; struct spi_transfer *cur_transfer; u32 xfer_len; u32 num_xfered; @@ -1221,25 +1221,38 @@ static int mtk_spi_probe(struct platform_device *pdev) goto err_put_master; } + mdata->spi_hclk = devm_clk_get(&pdev->dev, "spi-hclk"); + if (!IS_ERR(mdata->spi_hclk)) { + ret = clk_prepare_enable(mdata->spi_hclk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable spi_hclk (%d)\n", ret); + goto err_put_master; + } + } + ret = clk_prepare_enable(mdata->spi_clk); if (ret < 0) { dev_err(&pdev->dev, "failed to enable spi_clk (%d)\n", ret); - goto err_put_master; + goto err_disable_spi_hclk; } ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk); if (ret < 0) { dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret); - clk_disable_unprepare(mdata->spi_clk); - goto err_put_master; + goto err_disable_spi_clk; } mdata->spi_clk_hz = clk_get_rate(mdata->spi_clk); - if (mdata->dev_comp->no_need_unprepare) + if (mdata->dev_comp->no_need_unprepare) { clk_disable(mdata->spi_clk); - else + if (!IS_ERR(mdata->spi_hclk)) + clk_disable(mdata->spi_hclk); + } else { clk_disable_unprepare(mdata->spi_clk); + if (!IS_ERR(mdata->spi_hclk)) + clk_disable_unprepare(mdata->spi_hclk); + } pm_runtime_enable(&pdev->dev); @@ -1279,6 +1292,11 @@ static int mtk_spi_probe(struct platform_device *pdev) err_disable_runtime_pm: pm_runtime_disable(&pdev->dev); +err_disable_spi_clk: + clk_disable_unprepare(mdata->spi_clk); +err_disable_spi_hclk: + if (!IS_ERR(mdata->spi_hclk)) + clk_disable_unprepare(mdata->spi_hclk); err_put_master: spi_master_put(master); @@ -1294,8 +1312,11 @@ static int mtk_spi_remove(struct platform_device *pdev) mtk_spi_reset(mdata); - if (mdata->dev_comp->no_need_unprepare) + if (mdata->dev_comp->no_need_unprepare) { clk_unprepare(mdata->spi_clk); + if (!IS_ERR(mdata->spi_hclk)) + clk_unprepare(mdata->spi_hclk); + } return 0; } @@ -1311,8 +1332,11 @@ static int mtk_spi_suspend(struct device *dev) if (ret) return ret; - if (!pm_runtime_suspended(dev)) + if (!pm_runtime_suspended(dev)) { clk_disable_unprepare(mdata->spi_clk); + if (!IS_ERR(mdata->spi_hclk)) + clk_disable_unprepare(mdata->spi_hclk); + } return ret; } @@ -1329,11 +1353,23 @@ static int mtk_spi_resume(struct device *dev) dev_err(dev, "failed to enable spi_clk (%d)\n", ret); return ret; } + + if (!IS_ERR(mdata->spi_hclk)) { + clk_prepare_enable(mdata->spi_hclk); + if (ret < 0) { + dev_err(dev, "failed to enable spi_hclk (%d)\n", ret); + clk_disable_unprepare(mdata->spi_clk); + return ret; + } + } } ret = spi_master_resume(master); - if (ret < 0) + if (ret < 0) { clk_disable_unprepare(mdata->spi_clk); + if (!IS_ERR(mdata->spi_hclk)) + clk_disable_unprepare(mdata->spi_hclk); + } return ret; } @@ -1345,10 +1381,15 @@ static int mtk_spi_runtime_suspend(struct device *dev) struct spi_master *master = dev_get_drvdata(dev); struct mtk_spi *mdata = spi_master_get_devdata(master); - if (mdata->dev_comp->no_need_unprepare) + if (mdata->dev_comp->no_need_unprepare) { clk_disable(mdata->spi_clk); - else + if (!IS_ERR(mdata->spi_hclk)) + clk_disable(mdata->spi_hclk); + } else { clk_disable_unprepare(mdata->spi_clk); + if (!IS_ERR(mdata->spi_hclk)) + clk_disable_unprepare(mdata->spi_hclk); + } return 0; } @@ -1359,13 +1400,25 @@ static int mtk_spi_runtime_resume(struct device *dev) struct mtk_spi *mdata = spi_master_get_devdata(master); int ret; - if (mdata->dev_comp->no_need_unprepare) + if (mdata->dev_comp->no_need_unprepare) { ret = clk_enable(mdata->spi_clk); - else + if (!IS_ERR(mdata->spi_hclk)) + clk_enable(mdata->spi_hclk); + } else { ret = clk_prepare_enable(mdata->spi_clk); - if (ret < 0) { - dev_err(dev, "failed to enable spi_clk (%d)\n", ret); - return ret; + if (ret < 0) { + dev_err(dev, "failed to enable spi_clk (%d)\n", ret); + return ret; + } + + if (!IS_ERR(mdata->spi_hclk)) { + ret = clk_prepare_enable(mdata->spi_hclk); + if (ret < 0) { + dev_err(dev, "failed to enable spi_hclk (%d)\n", ret); + clk_disable_unprepare(mdata->spi_clk); + return ret; + } + } } return 0;