From patchwork Tue May 1 16:12:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 10374179 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A5CD0601C7 for ; Tue, 1 May 2018 16:22:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 93A4D28BF4 for ; Tue, 1 May 2018 16:22:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 876ED28C18; Tue, 1 May 2018 16:22:47 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI autolearn=ham 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 3775328BF4 for ; Tue, 1 May 2018 16:22:46 +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=l6NJ7hRnGEdgOdn1Mj+EWvpjiTFTUL+ptX0YaYQecuw=; b=NRKK8BcY8Zm/0lUcK/PgmVwzgY Sx5wUxExGuQH6i269NN7z8GhhFNSHSCmu2cXHJmdTkdmmw2n9RvalGKeMm286T8p70nveVFyPRKhI N6GuVli8a+zd9eWNxXI37uKqiRQkU4BVOd+D+qiwP+mBdTXyAQKvnvVG5UKMJTxg8la7WxCiPmHuT suoxCTnmrA3xt9wlXnhZQomv5rKtJ7VnegxNmgOAtXTtGbQ8KvA9Eu1l9RJtqbUMU2W3A4b3bbsRK /kQn7h1vu6eJYbcUxNsmfGnuulb6Ox5HprvT2c0+gSViYgQ1hFCwC13aLov+rYfx9niYDJT/vGVd8 3imsV+rA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fDY34-0006wT-1m; Tue, 01 May 2018 16:22:38 +0000 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76] helo=wens.csie.org) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fDXwT-0002hS-Sq for linux-arm-kernel@lists.infradead.org; Tue, 01 May 2018 16:15:54 +0000 Received: by wens.csie.org (Postfix, from userid 1000) id 89F425FEC3; Wed, 2 May 2018 00:15:17 +0800 (CST) From: Chen-Yu Tsai To: Maxime Ripard , Michael Turquette , Stephen Boyd , Giuseppe Cavallaro , Rob Herring , Mark Rutland , Mark Brown Subject: [PATCH net-next v2 14/15] soc: sunxi: export a regmap for EMAC clock reg on A64 Date: Wed, 2 May 2018 00:12:26 +0800 Message-Id: <20180501161227.2110-15-wens@csie.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180501161227.2110-1-wens@csie.org> References: <20180501161227.2110-1-wens@csie.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180501_091550_297743_B854BABC X-CRM114-Status: GOOD ( 14.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, netdev@vger.kernel.org, Chen-Yu Tsai , Corentin Labbe , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Icenowy Zheng 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 From: Icenowy Zheng The A64 SRAM controller memory zone has a EMAC clock register, which is needed by the Ethernet MAC driver (dwmac-sun8i). Export a regmap for this register on A64. Signed-off-by: Icenowy Zheng [wens@csie.org: export whole address range with only EMAC register accessible and drop regmap name] Signed-off-by: Chen-Yu Tsai --- drivers/soc/sunxi/sunxi_sram.c | 57 ++++++++++++++++++++++++++++++++-- 1 file changed, 55 insertions(+), 2 deletions(-) diff --git a/drivers/soc/sunxi/sunxi_sram.c b/drivers/soc/sunxi/sunxi_sram.c index 882be5ed7e84..eec7fc6e9f66 100644 --- a/drivers/soc/sunxi/sunxi_sram.c +++ b/drivers/soc/sunxi/sunxi_sram.c @@ -17,6 +17,7 @@ #include #include #include +#include #include @@ -281,13 +282,51 @@ int sunxi_sram_release(struct device *dev) } EXPORT_SYMBOL(sunxi_sram_release); +struct sunxi_sramc_variant { + bool has_emac_clock; +}; + +static const struct sunxi_sramc_variant sun4i_a10_sramc_variant = { + /* Nothing special */ +}; + +static const struct sunxi_sramc_variant sun50i_a64_sramc_variant = { + .has_emac_clock = true, +}; + +#define SUNXI_SRAM_EMAC_CLOCK_REG 0x30 +static bool sunxi_sram_regmap_accessible_reg(struct device *dev, + unsigned int reg) +{ + if (reg == SUNXI_SRAM_EMAC_CLOCK_REG) + return true; + return false; +} + +static struct regmap_config sunxi_sram_emac_clock_regmap = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + /* last defined register */ + .max_register = SUNXI_SRAM_EMAC_CLOCK_REG, + /* other devices have no business accessing other registers */ + .readable_reg = sunxi_sram_regmap_accessible_reg, + .writeable_reg = sunxi_sram_regmap_accessible_reg, +}; + static int sunxi_sram_probe(struct platform_device *pdev) { struct resource *res; struct dentry *d; + struct regmap *emac_clock; + const struct sunxi_sramc_variant *variant; sram_dev = &pdev->dev; + variant = of_device_get_match_data(&pdev->dev); + if (!variant) + return -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) @@ -300,12 +339,26 @@ static int sunxi_sram_probe(struct platform_device *pdev) if (!d) return -ENOMEM; + if (variant->has_emac_clock) { + emac_clock = devm_regmap_init_mmio(&pdev->dev, base, + &sunxi_sram_emac_clock_regmap); + + if (IS_ERR(emac_clock)) + return PTR_ERR(emac_clock); + } + return 0; } static const struct of_device_id sunxi_sram_dt_match[] = { - { .compatible = "allwinner,sun4i-a10-sram-controller" }, - { .compatible = "allwinner,sun50i-a64-sram-controller" }, + { + .compatible = "allwinner,sun4i-a10-sram-controller", + .data = &sun4i_a10_sramc_variant, + }, + { + .compatible = "allwinner,sun50i-a64-sram-controller", + .data = &sun50i_a64_sramc_variant, + }, { }, }; MODULE_DEVICE_TABLE(of, sunxi_sram_dt_match);