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[23.128.96.18]) by mx.google.com with ESMTP id q16si1367999ejm.486.2020.10.21.06.32.51; Wed, 21 Oct 2020 06:33:13 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2441794AbgJUKfE (ORCPT + 99 others); Wed, 21 Oct 2020 06:35:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57182 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2441780AbgJUKfD (ORCPT ); Wed, 21 Oct 2020 06:35:03 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F33CFC0613CE for ; Wed, 21 Oct 2020 03:35:02 -0700 (PDT) Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kVBSK-0006kK-Vy; Wed, 21 Oct 2020 12:34:56 +0200 Received: from afa by dude.hi.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1kVBSK-00024m-Lr; Wed, 21 Oct 2020 12:34:56 +0200 From: Ahmad Fatoum To: Rob Herring , Maxime Coquelin , Alexandre Torgue Cc: kernel@pengutronix.de, Arnaud Pouliquen , Ahmad Fatoum , devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] ARM: dts: stm32: support child mfd cells for the stm32mp1 TAMP syscon Date: Wed, 21 Oct 2020 12:28:56 +0200 Message-Id: <20201021102855.18026-2-a.fatoum@pengutronix.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201021102855.18026-1-a.fatoum@pengutronix.de> References: <20201021102855.18026-1-a.fatoum@pengutronix.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: afa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The stm32mp1 TAMP peripheral has 32 backup registers that survive a warm reset. This makes them suitable for storing a reboot mode, which the vendor's kernel tree is already doing[0]. The actual syscon-reboot-mode child node can be added by a board.dts or fixed up by the bootloader. For the child node to be probed, the compatible needs to include simple-mfd. The binding now specifies this, so have the SoC dtsi adhere to it. [0]: https://github.com/STMicroelectronics/linux/commit/2e9bfc29dd Signed-off-by: Ahmad Fatoum --- v1 -> v2: - Dropped simple-bus. simple-mfd is all that's needed - reworded commit message --- arch/arm/boot/dts/stm32mp151.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi index 842ecffae73a..662c2408d41b 100644 --- a/arch/arm/boot/dts/stm32mp151.dtsi +++ b/arch/arm/boot/dts/stm32mp151.dtsi @@ -1542,7 +1542,7 @@ i2c6: i2c@5c009000 { }; tamp: tamp@5c00a000 { - compatible = "st,stm32-tamp", "syscon"; + compatible = "st,stm32-tamp", "syscon", "simple-mfd"; reg = <0x5c00a000 0x400>; }; -- 2.28.0