From patchwork Tue Jan 31 00:05:39 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 138672 X-Patchwork-Delegate: sbabic@denx.de Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 11CFD1007D1 for ; Tue, 31 Jan 2012 11:05:57 +1100 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 86FCF280BE; Tue, 31 Jan 2012 01:05:55 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FS33EE3D5Ndt; Tue, 31 Jan 2012 01:05:55 +0100 (CET) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 8AE27280A6; Tue, 31 Jan 2012 01:05:52 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id CC50B28099 for ; Tue, 31 Jan 2012 01:05:48 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id J2eLbJJcAUtu for ; Tue, 31 Jan 2012 01:05:47 +0100 (CET) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from mail-ey0-f172.google.com (mail-ey0-f172.google.com [209.85.215.172]) by theia.denx.de (Postfix) with ESMTPS id 3CAE0280AB for ; Tue, 31 Jan 2012 01:05:46 +0100 (CET) Received: by eaai12 with SMTP id i12so1710737eaa.3 for ; Mon, 30 Jan 2012 16:05:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:mime-version :content-type:content-transfer-encoding; bh=bIrxbC9+MRNTBKM22P28kI1ZJjJhju8VQLohA8yZlsM=; b=jHHIKiIOj6Ghc8MMPLq7jV1G0i7h+s1tMnMZFgeS4YJSCJdnSEVoWxuThnhQgtnZsb fEnsLAL5WVmf1H+gxMK4mEnQMGagVKcyvUogwIfZU1NDAkX5RK48rtCmrQhIl1aF8Gcu zHuk5X7SiN+v4+B7LC/41gbX18GoNCXSPnuqw= Received: by 10.213.16.134 with SMTP id o6mr3941eba.67.1327968346209; Mon, 30 Jan 2012 16:05:46 -0800 (PST) Received: from mashiro.lan ([188.175.34.16]) by mx.google.com with ESMTPS id y12sm78980957eeb.11.2012.01.30.16.05.45 (version=SSLv3 cipher=OTHER); Mon, 30 Jan 2012 16:05:45 -0800 (PST) From: Marek Vasut To: u-boot@lists.denx.de Date: Tue, 31 Jan 2012 01:05:39 +0100 Message-Id: <1327968339-20585-1-git-send-email-marek.vasut@gmail.com> X-Mailer: git-send-email 1.7.8.3 MIME-Version: 1.0 Cc: =?UTF-8?q?Robert=20Deli=C3=ABn?= , Matthias Fuchs Subject: [U-Boot] [PATCH] i.MX28: Make the stabilization delays shorter X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de Cut down the VDDIO/VDDA regulator stabilization delays to 500 uS. That should be enough according to the datasheet and bootlets. Signed-off-by: Marek Vasut Cc: Wolfgang Denk Cc: Detlev Zundel Cc: Stefano Babic Cc: Robert Deliën Cc: Fabio Estevam Cc: Matthias Fuchs --- arch/arm/cpu/arm926ejs/mx28/spl_power_init.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c index c6c25d9..4b09b0c 100644 --- a/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c +++ b/arch/arm/cpu/arm926ejs/mx28/spl_power_init.c @@ -805,7 +805,7 @@ void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout) if (powered_by_linreg || (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO)) - early_delay(1500); + early_delay(500); else { while (!(readl(&power_regs->hw_power_sts) & POWER_STS_DC_OK)) @@ -842,7 +842,7 @@ void mx28_power_set_vddio(uint32_t new_target, uint32_t new_brownout) if (powered_by_linreg || (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO)) - early_delay(1500); + early_delay(500); else { while (!(readl(&power_regs->hw_power_sts) & POWER_STS_DC_OK)) @@ -902,7 +902,7 @@ void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout) if (powered_by_linreg || (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO)) - early_delay(1500); + early_delay(500); else { while (!(readl(&power_regs->hw_power_sts) & POWER_STS_DC_OK)) @@ -939,7 +939,7 @@ void mx28_power_set_vddd(uint32_t new_target, uint32_t new_brownout) if (powered_by_linreg || (readl(&power_regs->hw_power_sts) & POWER_STS_VDD5V_GT_VDDIO)) - early_delay(1500); + early_delay(500); else { while (!(readl(&power_regs->hw_power_sts) & POWER_STS_DC_OK))