From patchwork Fri Apr 17 22:17:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Priit Laes X-Patchwork-Id: 201825 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=-8.4 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=ham 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 5D199C38A2B for ; Fri, 17 Apr 2020 22:23:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 332732223C for ; Fri, 17 Apr 2020 22:23:47 +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="TZclkyba" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728741AbgDQWXq (ORCPT ); Fri, 17 Apr 2020 18:23:46 -0400 Received: from plaes.org ([188.166.43.21]:57460 "EHLO plaes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728517AbgDQWXq (ORCPT ); Fri, 17 Apr 2020 18:23:46 -0400 X-Greylist: delayed 350 seconds by postgrey-1.27 at vger.kernel.org; Fri, 17 Apr 2020 18:23:45 EDT Received: from localhost (unknown [IPv6:2001:1530:1000:9d4d:940e:6b9e:3deb:4]) by plaes.org (Postfix) with ESMTPSA id A7D8840F77; Fri, 17 Apr 2020 22:17:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=plaes.org; s=mail; t=1587161875; bh=R/e4AeS+hYtR1SV4lPnHnWWGgqogYvwGJXb2bJni8Gs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TZclkybauT9AxtT/TF3Gf+6lkIYgIDJ33SAAPA7Z1QS2G+JfTqiHhragEBFO3DhFS OfUoqA4fOMbc5KFs9+r3FpQLDgaFVWdr3dMj5h+Gl8u1njA4Rw8oUzRVddcgTdUJGi yCKykq9IOyV7KLmIszFsL69mqkL3vTNhmE7zydscV2AlVepJgGL9832h8TD2dUaofB onfU46E8V+TyUsQg6k8UN7Qk+nlmqSNNA/RCPybFbkTu0am88SnX18QAJN4m3UqLgQ BgiZ7wwuHfUJ019K34mfd9zZDYNqF3ALiyU+aKhyAKARtd5Gvnzt2X+voW8qTld69L RNhCre324KBBg== 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 2/4] clk: sunxi-ng: a20: export a regmap to access the GMAC register Date: Sat, 18 Apr 2020 01:17:28 +0300 Message-Id: <20200417221730.555954-3-plaes@plaes.org> X-Mailer: git-send-email 2.25.2 In-Reply-To: <20200417221730.555954-1-plaes@plaes.org> References: <20200417221730.555954-1-plaes@plaes.org> MIME-Version: 1.0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Only GMAC register is allowed to be written, read access to registers is not restricted. Export a regmap of the CCU. Signed-off-by: Priit Laes --- drivers/clk/sunxi-ng/ccu-sun4i-a10.c | 31 ++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c index 839e9d5a1cff..cba51c2c7eba 100644 --- a/drivers/clk/sunxi-ng/ccu-sun4i-a10.c +++ b/drivers/clk/sunxi-ng/ccu-sun4i-a10.c @@ -1426,6 +1426,30 @@ static const struct sunxi_ccu_desc sun7i_a20_ccu_desc = { .num_resets = ARRAY_SIZE(sunxi_a10_a20_ccu_resets), }; +/* + * Add regmap for the GMAC driver (dwmac-sun8i) 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 void bootstrap_clocks(void __iomem *reg) { u32 val; @@ -1474,6 +1498,7 @@ static int sun4i_a10_ccu_probe(struct platform_device *pdev) static int sun7i_a20_ccu_probe(struct platform_device *pdev) { + struct regmap *regmap; struct resource *res; void __iomem *reg; @@ -1484,6 +1509,12 @@ static int sun7i_a20_ccu_probe(struct platform_device *pdev) bootstrap_clocks(reg); + regmap = devm_regmap_init_mmio(&pdev->dev, reg, + &sun7i_a20_ccu_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + return sunxi_ccu_probe(pdev->dev.of_node, reg, &sun7i_a20_ccu_desc); }