From patchwork Thu Nov 21 09:23:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manikandan Muralidharan X-Patchwork-Id: 13881797 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 3CA18D75BDD for ; Thu, 21 Nov 2024 09:23:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A492A10E8C3; Thu, 21 Nov 2024 09:23:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.b="dM/vKqAb"; dkim-atps=neutral Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by gabe.freedesktop.org (Postfix) with ESMTPS id CDE8110E8BA for ; 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21 Nov 2024 02:23:41 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Thu, 21 Nov 2024 02:23:08 -0700 Received: from che-lt-i67131.microchip.com (10.10.85.11) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.35 via Frontend Transport; Thu, 21 Nov 2024 02:23:04 -0700 From: Manikandan Muralidharan To: , , , , , , , , , , , , , CC: , Dharma Balasubiramani Subject: [PATCH 2/3] mfd: atmel-hlcdc: fetch LVDS PLL clock for LVDS display Date: Thu, 21 Nov 2024 14:53:07 +0530 Message-ID: <20241121092308.130328-2-manikandan.m@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241121092308.130328-1-manikandan.m@microchip.com> References: <20241121092308.130328-1-manikandan.m@microchip.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The XLCDC IP supports DSI, parallel RGB and LVDS Display. sys_clk(Generic clock) is used for DSI and Parallel RGB displays; And LVDS PLL is used with LVDS displays. obtain anyone of the clocks for the LCD to operate Signed-off-by: Manikandan Muralidharan Signed-off-by: Dharma Balasubiramani --- drivers/mfd/atmel-hlcdc.c | 16 ++++++++++++++-- include/linux/mfd/atmel-hlcdc.h | 1 + 2 files changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c index 4c4e35d404f3..60b0b766459e 100644 --- a/drivers/mfd/atmel-hlcdc.c +++ b/drivers/mfd/atmel-hlcdc.c @@ -108,10 +108,22 @@ static int atmel_hlcdc_probe(struct platform_device *pdev) return PTR_ERR(hlcdc->periph_clk); } + /* + * Obtain one of the main clocks (GCK / LVDS PLL) required by the + * LCD to function, + * GCK for Parallel RGB and MIPI displays; + * LVDS PLL for LVDS displays. + */ + hlcdc->sys_clk = NULL; + hlcdc->lvds_pll_clk = NULL; hlcdc->sys_clk = devm_clk_get(dev, "sys_clk"); if (IS_ERR(hlcdc->sys_clk)) { - dev_err(dev, "failed to get system clock\n"); - return PTR_ERR(hlcdc->sys_clk); + dev_dbg(dev, "failed to get system clock\n"); + hlcdc->lvds_pll_clk = devm_clk_get(dev, "lvds_pll_clk"); + if (IS_ERR(hlcdc->lvds_pll_clk)) { + dev_err(dev, "failed to get LVDS PLL clock\n"); + return PTR_ERR(hlcdc->lvds_pll_clk); + } } hlcdc->slow_clk = devm_clk_get(dev, "slow_clk"); diff --git a/include/linux/mfd/atmel-hlcdc.h b/include/linux/mfd/atmel-hlcdc.h index 80d675a03b39..07c2081867fd 100644 --- a/include/linux/mfd/atmel-hlcdc.h +++ b/include/linux/mfd/atmel-hlcdc.h @@ -75,6 +75,7 @@ */ struct atmel_hlcdc { struct regmap *regmap; + struct clk *lvds_pll_clk; struct clk *periph_clk; struct clk *sys_clk; struct clk *slow_clk;