From patchwork Tue Mar 15 03:24:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leilk Liu X-Patchwork-Id: 12781013 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 E7A1BC433F5 for ; Tue, 15 Mar 2022 03:30:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9sjtUNaCWBqTiy3zbkFGYfogSzkJR7HNPHvXhugrqOM=; b=zt9V5QfZckb0Jm PqAn3MQPyPidHQBBKJFKEwlH+JIXddrHSMguEWW1YufDECdgQR76fq36rCVE3eUdxUgB3RbTCcz43 z/XonHQgIjuYwWhTeIcQ5ovHNhcmV0gAdq4OxHqdxIwdDx90zJI+JG2qYBV0wLXnilGGybHMPYniH GsUbXfK2RiGVaMS9qiRQbrSeIIUBvd1OWM+pOI9qY417grK1o/ibtIefIR7doDgHfw6aIVZaevdlk /8TS5p37M/dbSfgrbFFm8t4ewlVnH8xx6NrQAY1q7+FZ7nS9NaKyFjdzcwu87ONOndzlxe71zMHGb M10qWg1FaSS2JEFwB20A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nTxsH-007d51-Cm; Tue, 15 Mar 2022 03:29:29 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nTxrr-007cxS-96; Tue, 15 Mar 2022 03:29:04 +0000 X-UUID: 463237426ffa41248a8435bd1bf9490f-20220314 X-UUID: 463237426ffa41248a8435bd1bf9490f-20220314 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 351540739; Mon, 14 Mar 2022 20:28:56 -0700 Received: from mtkexhb02.mediatek.inc (172.21.101.103) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 14 Mar 2022 20:24:20 -0700 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkexhb02.mediatek.inc (172.21.101.103) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 15 Mar 2022 11:24:19 +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; Tue, 15 Mar 2022 11:24:18 +0800 From: Leilk Liu To: Mark Brown CC: Rob Herring , Matthias Brugger , , , , , , Leilk Liu Subject: [PATCH V4 6/6] spi: mediatek: support hclk Date: Tue, 15 Mar 2022 11:24:11 +0800 Message-ID: <20220315032411.2826-7-leilk.liu@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220315032411.2826-1-leilk.liu@mediatek.com> References: <20220315032411.2826-1-leilk.liu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220314_202903_345423_24397274 X-CRM114-Status: GOOD ( 16.73 ) 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 this patch adds 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 8958c3fa4fea..d4a602e78aa7 100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@ -130,7 +130,7 @@ 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; @@ -1252,25 +1252,38 @@ static int mtk_spi_probe(struct platform_device *pdev) goto err_put_master; } + mdata->spi_hclk = devm_clk_get(&pdev->dev, "hclk"); + if (!IS_ERR(mdata->spi_hclk)) { + ret = clk_prepare_enable(mdata->spi_hclk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable 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); @@ -1310,6 +1323,11 @@ 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); @@ -1325,8 +1343,11 @@ 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; } @@ -1342,8 +1363,11 @@ 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; } @@ -1360,11 +1384,23 @@ 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; } @@ -1376,10 +1412,15 @@ 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; } @@ -1390,13 +1431,25 @@ 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;