From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=DKIM_ADSP_ALL,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AACB4C83007 for ; Wed, 29 Apr 2020 20:46:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85F4F21973 for ; Wed, 29 Apr 2020 20:46:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=plaes.org header.i=@plaes.org header.b="IQhJtA3O" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727068AbgD2UqY (ORCPT ); Wed, 29 Apr 2020 16:46:24 -0400 Received: from plaes.org ([188.166.43.21]:34960 "EHLO plaes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726456AbgD2UqX (ORCPT ); Wed, 29 Apr 2020 16:46:23 -0400 Received: from localhost (unknown [IPv6:2001:1530:1000:d397:940e:6b9e:3deb:3]) by plaes.org (Postfix) with ESMTPSA id 92F91406D2; Wed, 29 Apr 2020 20:46:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=plaes.org; s=mail; t=1588193180; bh=oXxncios4NGf2aktHiZX8FnCvunPuUkRAB5eO78zbrg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IQhJtA3O6U6JCR32OoY0yGZk+wkoR+mazjBOT2uiJTHCusppZ2YPufw/sgfbmANCu UDqRAeOOmk8wz4ILHVCOJkGEH6SEsUfzdkPSadRR/GLi/ataECoiQx7PoN568Zx4nO qFsPMesW6/IxRbvUMYm0cAW83f+vIjQh26akHkO17W31aaLyBgEFdk+gJwacuNMmYO oAh2spSY91Fz6L7j7oENLHG56F3M+Dfp4dhOxE2+tbzQgLvWORrYsbd/DecsKwjBUy 5dYJe+HQQ7ZTEtx80OjzkiXYYqZsgcbCvJ3gAp4PN62a/deQhNVdx0kCUIyomm2yBd frsWFybK4wQNQ== From: Priit Laes To: Maxime Ripard , Chen-Yu Tsai , Rob Herring , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-sunxi@googlegroups.com Cc: Priit Laes Subject: [PATCH v2 1/6] clk: sunxi-ng: a20: Register regmap for sun7i CCU Date: Wed, 29 Apr 2020 23:46:07 +0300 Message-Id: <20200429204612.31883-2-plaes@plaes.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200429204612.31883-1-plaes@plaes.org> References: <20200429204612.31883-1-plaes@plaes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On sun7i, the gmac clock is handled by the dwmac-sunxi driver, but its configuration register is located in the CCU register range, requiring proper regmap setup. In order to do that, we use CLK_OF_DECLARE_DRIVER to initialize sun7i ccu, which clears the OF_POPULATED flag, allowing the platform device to probe the same resource with proper device node. Signed-off-by: Priit Laes --- drivers/clk/sunxi-ng/ccu-sun4i-a10.c | 60 +++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c index f32366d9336e..fbdf9ecf21b8 100644 --- a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c +++ b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c @@ -8,6 +8,8 @@ #include #include #include +#include +#include #include "ccu_common.h" #include "ccu_reset.h" @@ -1478,5 +1480,61 @@ static void __init sun7i_a20_ccu_setup(struct device_node *node) { sun4i_ccu_init(node, &sun7i_a20_ccu_desc); } -CLK_OF_DECLARE(sun7i_a20_ccu, "allwinner,sun7i-a20-ccu", +CLK_OF_DECLARE_DRIVER(sun7i_a20_ccu, "allwinner,sun7i-a20-ccu", sun7i_a20_ccu_setup); + +/* + * Regmap for the GMAC driver (dwmac-sunxi) to allow access to + * GMAC configuration register. + */ +#define SUN7I_A20_GMAC_CFG_REG 0x164 +static bool sun7i_a20_ccu_regmap_accessible_reg(struct device *dev, + unsigned int reg) +{ + if (reg == SUN7I_A20_GMAC_CFG_REG) + return true; + return false; +} + +static struct regmap_config sun7i_a20_ccu_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x1f4, /* clk_out_b */ + + .readable_reg = sun7i_a20_ccu_regmap_accessible_reg, + .writeable_reg = sun7i_a20_ccu_regmap_accessible_reg, +}; + +static int sun7i_a20_ccu_probe_regmap(struct platform_device *pdev) +{ + void __iomem *reg; + struct resource *res; + struct regmap *regmap; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + reg = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (IS_ERR(reg)) + return PTR_ERR(reg); + + regmap = devm_regmap_init_mmio(&pdev->dev, reg, + &sun7i_a20_ccu_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return 0; +} + +static const struct of_device_id sun7i_a20_ccu_ids[] = { + { .compatible = "allwinner,sun7i-a20-ccu"}, + { } +}; + +static struct platform_driver sun7i_a20_ccu_driver = { + .probe = sun7i_a20_ccu_probe_regmap, + .driver = { + .name = "sun7i-a20-ccu", + .of_match_table = sun7i_a20_ccu_ids, + }, +}; +builtin_platform_driver(sun7i_a20_ccu_driver); -- 2.26.2