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 Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 46A4CC433F5 for ; Tue, 29 Mar 2022 12:20:09 +0000 (UTC) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 14AF983F94; Tue, 29 Mar 2022 14:20:03 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=glider.be Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Received: by phobos.denx.de (Postfix, from userid 109) id 7305283F91; Tue, 29 Mar 2022 14:19:21 +0200 (CEST) Received: from laurent.telenet-ops.be (laurent.telenet-ops.be [IPv6:2a02:1800:110:4::f00:19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 2803883F91 for ; Tue, 29 Mar 2022 14:19:18 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=none (p=none dis=none) header.from=glider.be Authentication-Results: phobos.denx.de; spf=none smtp.mailfrom=geert@linux-m68k.org Received: from ramsan.of.borg ([IPv6:2a02:1810:ac12:ed40:d553:ff0a:6830:6bde]) by laurent.telenet-ops.be with bizsmtp id CCKH2700X49QC4401CKH5S; Tue, 29 Mar 2022 14:19:17 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1nZAof-007GV1-4K; Tue, 29 Mar 2022 14:19:17 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1nZAoe-00CDZr-NT; Tue, 29 Mar 2022 14:19:16 +0200 From: Geert Uytterhoeven To: u-boot@lists.denx.de Cc: Marek Vasut , linux-renesas-soc@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH u-boot 0/3] renesas: Fix RPC-IF enablement Date: Tue, 29 Mar 2022 14:19:06 +0200 Message-Id: X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Mailman-Approved-At: Tue, 29 Mar 2022 14:20:01 +0200 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.5 at phobos.denx.de X-Virus-Status: Clean Hi all, On Renesas R-Car Gen3 platforms, the SPI Multi I/O Bus Controllers (RPC-IF) provide access to HyperFlash or QSPI storage. On production systems, they are typically locked by the TF-A firmware, unless TF-A is built with RCAR_RPC_HYPERFLASH_LOCKED=0. When unlocked, TF-A communicates this to subsequent software by passing a DT fragment that sets the "status" property of the RPC-IF device node to "okay". Unfortunately there are several issues preventing this from working all the way to Linux: 1. TF-A (and U-Boot on the receiving side) uses a device node name that does not conform to the DT specification nor the DT bindings for RPC-IF, 2. While U-Boot receives the RPC-IF enablement from TF-A, it does not propagate it to Linux yet, 3. The DTS files that are part of Linux do not have RPC HyperFlash support yet. The first issue in TF-A is handled by [1]. This patch series takes care of the first and second issue in U-Boot, by renaming the RPC-IF device node, and by propagating the enablement from TF-A, if present, to Linux. The third patch updates the RPC-IF compatible values to match the actual DT bindings, but this is not critical for operation, and can be postponed (e.g. by syncing DTS with Linux v5.19). Patches to enable RPC-IF support in Linux are available at [2]. Thanks for your comments! [1] "[PATCH TF-A] fix(plat/rcar3): Fix RPC-IF device node name" https://lore.kernel.org/r/3685623bed84674039adb61e723288d359ab0a50.1648544199.git.geert+renesas@glider.be [2] "[PATCH 0/5] arm64: dts: renesas: rcar-gen3: Enable HyperFlash support" https://lore.kernel.org/r/cover.1648548339.git.geert+renesas@glider.be Geert Uytterhoeven (3): ARM: dts: rmobile: Fix RPC-IF device node names ARM: renesas: Propagate RPC-IF enablement to subsequent software [RFC] renesas: Fix RPC-IF compatible values arch/arm/dts/r7s72100-gr-peach-u-boot.dts | 4 +- arch/arm/dts/r8a774c0-u-boot.dtsi | 4 +- arch/arm/dts/r8a77950-u-boot.dtsi | 4 +- arch/arm/dts/r8a77960-u-boot.dtsi | 4 +- arch/arm/dts/r8a77965-u-boot.dtsi | 4 +- arch/arm/dts/r8a77970-u-boot.dtsi | 4 +- arch/arm/dts/r8a77980-u-boot.dtsi | 4 +- arch/arm/dts/r8a77990-u-boot.dtsi | 4 +- arch/arm/dts/r8a77995-u-boot.dtsi | 4 +- arch/arm/dts/r8a779a0-u-boot.dtsi | 2 +- board/renesas/rcar-common/common.c | 46 ++++++++++++++++++++++- drivers/mtd/renesas_rpc_hf.c | 3 +- drivers/spi/renesas_rpc_spi.c | 9 +---- 13 files changed, 67 insertions(+), 29 deletions(-) -- 2.25.1 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds