From patchwork Wed Dec 19 16:27:40 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jagan Teki X-Patchwork-Id: 207451 X-Patchwork-Delegate: vapier@gentoo.org 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 010762C0097 for ; Thu, 20 Dec 2012 03:28:30 +1100 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id D1D5F4A03F; Wed, 19 Dec 2012 17:28:26 +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 usBTdvFKMAlv; Wed, 19 Dec 2012 17:28:26 +0100 (CET) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 276EC4A02F; Wed, 19 Dec 2012 17:28:25 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id A39F34A02F for ; Wed, 19 Dec 2012 17:28:22 +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 sl0+f8w6afoh for ; Wed, 19 Dec 2012 17:28:20 +0100 (CET) X-Greylist: delayed 17984 seconds by postgrey-1.27 at theia; Wed, 19 Dec 2012 17:28:18 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-pa0-f43.google.com (mail-pa0-f43.google.com [209.85.220.43]) by theia.denx.de (Postfix) with ESMTPS id 38BB34A026 for ; Wed, 19 Dec 2012 17:28:18 +0100 (CET) Received: by mail-pa0-f43.google.com with SMTP id fb10so1422061pad.2 for ; Wed, 19 Dec 2012 08:28:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; bh=pBHpGNQSdjYdY7MEHv0Qbp/7pxVTV8tABW94BroQIMI=; b=pFD28Y1H2B6tLPvTnGS0r5h+pD6+wpxdyatd84eM39eVS0ksLyyCa9pP4s0DM7SMpk 6vl5UqJ0K5rVuTNEEUONyi+pfRKHAWhx+BBp/x1fIDxXmp7/rOelMRAl8W+BOOEYqMG7 dEFrZ38gRD6tdDpbHy++Iwvkbm0lc2zRj032HEAUsKbI/Xqa3AwLibDI1gPPlZlWnH7r VvFtbhe4f1VLLTuuFNjpU+OrGnErpl5UlkGuc2V5TkE8IWyt6n2NQOk6obGHoCbXlLx0 YXyY2FL+JDpvYL8a9xaquuCr0Hb682kyZnhAdlTTsjB+yvM/fERx/lijPNOyl030gDuW 7LNQ== X-Received: by 10.66.76.6 with SMTP id g6mr18706607paw.61.1355934495213; Wed, 19 Dec 2012 08:28:15 -0800 (PST) Received: from localhost.localdomain ([123.237.83.48]) by mx.google.com with ESMTPS id z5sm3683430pax.9.2012.12.19.08.28.13 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 19 Dec 2012 08:28:14 -0800 (PST) From: Jagannadha Sutradharudu Teki To: u-boot@lists.denx.de Date: Wed, 19 Dec 2012 21:57:40 +0530 Message-Id: <1355934463-24319-3-git-send-email-jagannadh.teki@gmail.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1355934463-24319-1-git-send-email-jagannadh.teki@gmail.com> References: <1355934463-24319-1-git-send-email-jagannadh.teki@gmail.com> Subject: [U-Boot] [U-Boot,v2 3/6] sf: Add status register reading support 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: , MIME-Version: 1.0 Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de This patch provides support to read a flash status register. Status register contains a control bits used to verify the progress of flash program and erase operations. User need to get the data through spi_flash_cmd_read_status() based on their usage. Signed-off-by: Jagannadha Sutradharudu Teki Tested-by: Jagannadha Sutradharudu Teki --- Changes in v2:none drivers/mtd/spi/spi_flash.c | 15 +++++++++++++++ drivers/mtd/spi/spi_flash_internal.h | 3 +++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c index 9e8939c..bf5ec4a 100644 --- a/drivers/mtd/spi/spi_flash.c +++ b/drivers/mtd/spi/spi_flash.c @@ -264,6 +264,21 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; } +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data) +{ + u8 cmd; + int ret; + + cmd = CMD_READ_STATUS; + ret = spi_flash_read_common(flash, &cmd, sizeof(cmd), (void *)data, 1); + if (ret < 0) { + debug("SF: fail to read status register\n"); + return ret; + } + + return 0; +} + /* * The following table holds all device probe functions * diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 141cfa8..8232595 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -77,6 +77,9 @@ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) /* Program the status register. */ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); +/* Read the status register */ +int spi_flash_cmd_read_status(struct spi_flash *flash, void *data); + /* * Same as spi_flash_cmd_read() except it also claims/releases the SPI * bus. Used as common part of the ->read() operation.