From patchwork Tue Jul 16 15:01:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dong Aisheng X-Patchwork-Id: 11046315 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D4379112C for ; Tue, 16 Jul 2019 15:25:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C078623B24 for ; Tue, 16 Jul 2019 15:25:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3AE3285F1; Tue, 16 Jul 2019 15:25:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3DC1E23B24 for ; Tue, 16 Jul 2019 15:25:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=uvgP7kBHZenXXDbaYphQ+wqYcb8MQtY/D4eQ54X9wng=; b=tOGJHZT5B3fem56+7l02KNzv4+ 3AQT9upvTn9+s4lHOAd+KXMYsEvjXR/f+/2nHnR0dGnRNSfAoYjG8WcU5uNvavhIIPlnaO0TAr1c3 jmfCQL4r2rbFZJyzC3ujCn3njs1rS0Kf6rwFN73uGhlPP87i/EQV7DtOzY9wGoUB/mJQnBnRP/hfS ZaDcX84RmfksrFHkyAB/tR6OFfAtYoU2KYJ35gESSkKCwcg0neC4ir36oaTvMloIfjdxEMR6fPThb EPMWOqxCXNq0OAUWhKwsXM6G/D/7s+BGevSR1Z7LLMuEV1hdnEC8mtr9MrFoi5XV5XPGQHjOjB/Pn E8+tq0+g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hnPKa-00082v-QO; Tue, 16 Jul 2019 15:25:28 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hnPIW-0005A8-Bd for linux-arm-kernel@lists.infradead.org; Tue, 16 Jul 2019 15:23:22 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 2EFB31A01B1; Tue, 16 Jul 2019 17:23:19 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 1836E1A00A6; Tue, 16 Jul 2019 17:23:14 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 2907D402FF; Tue, 16 Jul 2019 23:23:06 +0800 (SGT) From: Dong Aisheng To: linux-clk@vger.kernel.org Subject: [PATCH v3 08/11] clk: imx: imx8qxp-lpcg: add parsing clocks from device tree Date: Tue, 16 Jul 2019 23:01:02 +0800 Message-Id: <1563289265-10977-9-git-send-email-aisheng.dong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1563289265-10977-1-git-send-email-aisheng.dong@nxp.com> References: <1563289265-10977-1-git-send-email-aisheng.dong@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190716_082320_972627_9837122D X-CRM114-Status: GOOD ( 11.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dong Aisheng , sboyd@kernel.org, mturquette@baylibre.com, linux-imx@nxp.com, kernel@pengutronix.de, fabio.estevam@nxp.com, shawnguo@kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add parsing clocks from device tree. Cc: Stephen Boyd Cc: Shawn Guo Cc: Sascha Hauer Cc: Michael Turquette Signed-off-by: Dong Aisheng --- Changelog: v1->v3: no changes --- drivers/clk/imx/clk-imx8qxp-lpcg.c | 90 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c index fb6edf1..dbb8960 100644 --- a/drivers/clk/imx/clk-imx8qxp-lpcg.c +++ b/drivers/clk/imx/clk-imx8qxp-lpcg.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -152,6 +153,88 @@ static const struct imx8qxp_ss_lpcg imx8qxp_ss_lsio = { .num_max = IMX_LSIO_LPCG_CLK_END, }; +#define IMX_LPCG_MAX_CLKS 8 + +static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev, + struct device_node *np) +{ + const char *output_names[IMX_LPCG_MAX_CLKS]; + const char *parent_names[IMX_LPCG_MAX_CLKS]; + unsigned int bit_offset[IMX_LPCG_MAX_CLKS]; + struct clk_hw_onecell_data *clk_data; + struct clk_hw **clk_hws; + struct resource *res; + void __iomem *base; + bool autogate; + int count; + int ret; + int i; + + if (!of_device_is_compatible(np, "fsl,imx8qxp-lpcg")) + return -EINVAL; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + count = of_property_count_u32_elems(np, "bit-offset"); + if (count < 0) { + dev_err(&pdev->dev, "failed to count clocks\n"); + return -EINVAL; + } + + clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, count), + GFP_KERNEL); + if (!clk_data) + return -ENOMEM; + + clk_data->num = count; + clk_hws = clk_data->hws; + + ret = of_property_read_u32_array(np, "bit-offset", bit_offset, + clk_data->num); + if (ret < 0) { + dev_err(&pdev->dev, "failed to read clocks bit-offset\n"); + return -EINVAL; + } + + ret = of_clk_parent_fill(np, parent_names, clk_data->num); + if (ret != clk_data->num) { + dev_err(&pdev->dev, "failed to get clock parent names\n"); + return -EINVAL; + } + + ret = of_property_read_string_array(np, "clock-output-names", + output_names, clk_data->num); + if (ret != clk_data->num) { + dev_err(&pdev->dev, "failed to read clock-output-names\n"); + return -EINVAL; + } + + autogate = of_property_read_bool(np, "hw-autogate"); + + for (i = 0; i < clk_data->num; i++) { + if (bit_offset[i] > 31) { + dev_warn(&pdev->dev, "invalid bit offset of clock %d\n", + i); + return -EINVAL; + } + + clk_hws[i] = imx_clk_lpcg_scu(output_names[i], + parent_names[i], 0, base, + bit_offset[i], autogate); + if (IS_ERR(clk_hws[i])) { + dev_warn(&pdev->dev, "failed to register clock %d\n", + i); + return -EINVAL; + } + } + + return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, + clk_data); +} + static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -162,8 +245,14 @@ static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev) struct resource *res; struct clk_hw **clks; void __iomem *base; + int ret; int i; + /* try new binding to parse clocks from device tree first */ + ret = imx_lpcg_parse_clks_from_dt(pdev, np); + if (!ret) + return 0; + ss_lpcg = of_device_get_match_data(dev); if (!ss_lpcg) return -ENODEV; @@ -203,6 +292,7 @@ static const struct of_device_id imx8qxp_lpcg_match[] = { { .compatible = "fsl,imx8qxp-lpcg-adma", &imx8qxp_ss_adma, }, { .compatible = "fsl,imx8qxp-lpcg-conn", &imx8qxp_ss_conn, }, { .compatible = "fsl,imx8qxp-lpcg-lsio", &imx8qxp_ss_lsio, }, + { .compatible = "fsl,imx8qxp-lpcg", NULL }, { /* sentinel */ } };