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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 233DEC433FE for ; Sat, 19 Nov 2022 03:09:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=scDj6WIFK0Xdz68fLeSIgLICG8vV/etGQcNKs5PEI68=; b=j4V7MGlXhSrDkB 4wuqe4H2YwXewPkHP9GUw3O1Oc9AycJ12YcZe0PdT6jGQ8dcWChrf+WsdCUk7VZKWS7RFhnMuabfx sctJ7v540iuXMvzJhbHlBeJulnIAxibq9IriNLijJyZBM2DCcawdYXZVLD55V1IFLAMAEpKjZUDoY KiRd8Z28ck4De6nYaSdHPlFHAkErhS0o4MK9fx1O9s3Hr9x1EQ2Fiuh+y1Gtwv4PwhmyGDpRfJHmF n1xWi2r/MJCzD/Yu7ODxcgZ6ojbyamBaFLM+cDWK0D+fN2l7NqZgrrY/oh94CCfY7kQaRDOGt73uc cPD/+0mxkD/nsKWQ70yg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1owEDi-00AbYO-WA; Sat, 19 Nov 2022 03:08:43 +0000 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1owEDg-00AbUQ-Jo for linux-arm-kernel@lists.infradead.org; Sat, 19 Nov 2022 03:08:42 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 416AFB8265A; Sat, 19 Nov 2022 03:08:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F210C433D6; Sat, 19 Nov 2022 03:08:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1668827318; bh=Aa/UzsuEa2XC5pnHqhdLpclcpJ30O7MVovQPv+tNr0o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OYCVa7yGEVkkapypRtLw7cQWBpshoMXdQFiWnH3V/QgCxu+SL3ICcaacEjjm0FzGt wnp7E69VWQnp8a6a/vw5ZJ/z+jN1Vbt0MnQML9Bjsj4ADQxUUiSRyJTMQbhfZIq8Bi Ae1aLXyxRpe1Qufk2ZbfueVN9hjnpwfwLshSVU3Rm9i5FLb/YseNWIlFTk3egh52qh 6zmbtBOuBgSPiYFjq0z+6WtBMUCmNk5BkBGLMEYCU56MgiGxx/QGsMUx5xXG5XqtLy OA59uxYAGCzBdIeJvJimdaB2ZkK8NYFrRx3rxfyW7ez05cHcdHos3Had+ol4XQ6yxm 3HWu+AZ36xr9Q== Date: Sat, 19 Nov 2022 11:08:31 +0800 From: Shawn Guo To: "Peng Fan (OSS)" Cc: s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Peng Fan , Marco Felsch Subject: Re: [PATCH V6 08/12] arm64: dts: imx8mn-evk: set off-on-delay-us in regulator Message-ID: <20221119030830.GI16229@T480> References: <20221117095403.1876071-1-peng.fan@oss.nxp.com> <20221117095403.1876071-9-peng.fan@oss.nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221117095403.1876071-9-peng.fan@oss.nxp.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221118_190840_863538_C002B2D6 X-CRM114-Status: GOOD ( 13.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Nov 17, 2022 at 05:53:59PM +0800, Peng Fan (OSS) wrote: > From: Peng Fan > > Some SD Card controller and power circuitry has increased capacitance, > so the usual toggling of regulator to power the card off and on > is insufficient. > > According to SD spec, for sd card power reset operation, the sd card > supply voltage needs to be lower than 0.5v and keep over 1ms, otherwise, > next time power back the sd card supply voltage to 3.3v, sd card can't > support SD3.0 mode again. > > This patch add the off-on-delay-us, make sure the sd power reset behavior > is align with the specification. Without this patch, when do quick system > suspend/resume test, some sd card can't work at SD3.0 mode after system > resume back. > > Signed-off-by: Peng Fan > Reviewed-by: Marco Felsch Applied, thanks! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel