From patchwork Fri Jun 22 12:45:36 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Icenowy Zheng X-Patchwork-Id: 10482019 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 94E5E6023A for ; Fri, 22 Jun 2018 12:49:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3DA5C28D33 for ; Fri, 22 Jun 2018 12:49:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2DC6128D53; Fri, 22 Jun 2018 12:49:05 +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=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 BEC1228D33 for ; Fri, 22 Jun 2018 12:49:04 +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=pLhZ/IZCsp3qKGlpSpL8GCPgTd7Wy1LVLSLv6BbQ6N4=; b=a7YWqMdoADwOrJwipVSbDUaBA3 wnkOJq1WQAAptMPOJiQwDfg8+kj4hwvBRT2LBLuNJ7eWgRWPGKOmQnXrvqinHYYwOiodQcYdwQ4Y7 YOSBXUw9klZat4QmCM/fxhCj+fo+oM2Kjq2pvIsTFo0JyMaF4jzVkLsrHpged4TcevIxypMVRePZO yFmOF6odDamNmhs8e5FMAou+NnCvhuGfeeugzvqfY0qDMmghXmEuUtjlIs3XrUOtnQ7gZV8TVvD8V ZAis8O4U0WKNbI5Zx2Q3D4BUwxz3ESdkyphBUCLHC/h3kpyWi3I+8uvlb85Z1DV45oY8p2UKzX1m5 8lnXbwpQ==; 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 1fWLUt-0003K4-0C; Fri, 22 Jun 2018 12:49:03 +0000 Received: from caracal.maple.relay.mailchannels.net ([23.83.214.30]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fWLU6-0002wd-2A for linux-arm-kernel@lists.infradead.org; Fri, 22 Jun 2018 12:48:38 +0000 X-Sender-Id: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id CCA1F5E2284; Fri, 22 Jun 2018 12:48:02 +0000 (UTC) Received: from hermes.aosc.io (unknown [100.96.29.38]) (Authenticated sender: lmn-TZDUIOWCRQMW) by relay.mailchannels.net (Postfix) with ESMTPA id 5F5E45E1C85; Fri, 22 Jun 2018 12:48:00 +0000 (UTC) X-Sender-Id: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io Received: from hermes.aosc.io (hermes.aosc.io [199.195.250.187]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384) by 0.0.0.0:2500 (trex/5.15.3); Fri, 22 Jun 2018 12:48:02 +0000 X-MC-Relay: Neutral X-MailChannels-SenderId: lmn-tzduiowcrqmw|x-authsender|icenowy@aosc.io X-MailChannels-Auth-Id: lmn-TZDUIOWCRQMW X-Illegal-Snatch: 2d7c42fb36f0f8a9_1529671682626_2305503538 X-MC-Loop-Signature: 1529671682626:1134548210 X-MC-Ingress-Time: 1529671682625 Received: from localhost (localhost [127.0.0.1]) (Authenticated sender: icenowy@aosc.io) by hermes.aosc.io (Postfix) with ESMTPSA id 99043630E4; Fri, 22 Jun 2018 12:47:47 +0000 (UTC) From: Icenowy Zheng To: Rob Herring , Maxime Ripard , Chen-Yu Tsai , Jagan Teki , Jernej Skrabec Subject: [PATCH v2 3/7] bus: add bus driver for accessing Allwinner A64 DE2 Date: Fri, 22 Jun 2018 20:45:36 +0800 Message-Id: <20180622124540.56203-2-icenowy@aosc.io> In-Reply-To: <20180622124540.56203-1-icenowy@aosc.io> References: <20180622124540.56203-1-icenowy@aosc.io> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180622_054814_278817_BBC3C962 X-CRM114-Status: GOOD ( 20.94 ) 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, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, 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 The "Display Engine 2.0" (usually called DE2) on the Allwinner A64 SoC is different from the ones on other Allwinner SoCs. It requires a SRAM region to be claimed, otherwise all DE2 subblocks won't be accessible. Add a bus driver for the Allwinner A64 DE2 part which claims the SRAM region when probing. Signed-off-by: Icenowy Zheng --- No changes since v1. drivers/bus/Kconfig | 10 ++++++++ drivers/bus/Makefile | 1 + drivers/bus/sun50i-de2.c | 49 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+) create mode 100644 drivers/bus/sun50i-de2.c diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index d1c0b60e9326..1851112ccc29 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -103,6 +103,16 @@ config SIMPLE_PM_BUS Controller (BSC, sometimes called "LBSC within Bus Bridge", or "External Bus Interface") as found on several Renesas ARM SoCs. +config SUN50I_DE2_BUS + bool "Allwinner A64 DE2 Bus Driver" + default ARM64 + depends on ARCH_SUNXI + select SUNXI_SRAM + help + Say y here to enable support for Allwinner A64 DE2 bus driver. It's + mostly transparent, but a SRAM region needs to be claimed in the SRAM + controller to make the all blocks in the DE2 part accessible. + config SUNXI_RSB tristate "Allwinner sunXi Reduced Serial Bus Driver" default MACH_SUN8I || MACH_SUN9I || ARM64 diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile index b8f036cca7ff..ca300b1914ce 100644 --- a/drivers/bus/Makefile +++ b/drivers/bus/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_OMAP_INTERCONNECT) += omap_l3_smx.o omap_l3_noc.o obj-$(CONFIG_OMAP_OCP2SCP) += omap-ocp2scp.o obj-$(CONFIG_QCOM_EBI2) += qcom-ebi2.o +obj-$(CONFIG_SUN50I_DE2_BUS) += sun50i-de2.o obj-$(CONFIG_SUNXI_RSB) += sunxi-rsb.o obj-$(CONFIG_SIMPLE_PM_BUS) += simple-pm-bus.o obj-$(CONFIG_TEGRA_ACONNECT) += tegra-aconnect.o diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c new file mode 100644 index 000000000000..836828ef96d5 --- /dev/null +++ b/drivers/bus/sun50i-de2.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Allwinner A64 Display Engine 2.0 Bus Driver + * + * Copyright (C) 2018 Icenowy Zheng + */ + +#include +#include +#include + +static int sun50i_de2_bus_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + + ret = sunxi_sram_claim(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, "Error couldn't map SRAM to device\n"); + return ret; + } + + if (np) + of_platform_populate(np, NULL, NULL, &pdev->dev); + + return 0; +} + +static int sun50i_de2_bus_remove(struct platform_device *pdev) +{ + sunxi_sram_release(&pdev->dev); + return 0; +} + +static const struct of_device_id sun50i_de2_bus_of_match[] = { + { .compatible = "allwinner,sun50i-a64-de2", }, + { /* sentinel */ } +}; + +static struct platform_driver sun50i_de2_bus_driver = { + .probe = sun50i_de2_bus_probe, + .remove = sun50i_de2_bus_remove, + .driver = { + .name = "sun50i-de2-bus", + .of_match_table = sun50i_de2_bus_of_match, + }, +}; + +builtin_platform_driver(sun50i_de2_bus_driver);