From patchwork Sun Oct 18 21:31:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Weinberger X-Patchwork-Id: 1383914 X-Patchwork-Delegate: vigneshr@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2001:8b0:10b:1231::1; helo=merlin.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=nod.at Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=merlin.20170209 header.b=BPCydHNa; dkim-atps=neutral Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4CDtQt0rxwz9sS8 for ; Mon, 19 Oct 2020 08:32:54 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=9+R4MkkUxt95oFPeJrRHWSl0EKRZj+cUBgf2wOvzf6U=; b=BPCydHNau2Y5S0Vl8BLhL8QLCl +Zu1XqKTQ0Mj20U9CvZ+IoO3XaVA2nWMgs5wAoSFV/oyFjtIiUWXtwlMRgxEMkHz/OU89zuEdDaWa WJYuJYRWjeqKInptO8G43D4LEy3o/yTMvUUarlQ4yfO2jNAanj5BSgxrRTXUow0blCg02Je/v+zSY n7KefeazdeXQPIs8magDz8uyi/2CYt9eqc9B1uKPymrxRD18VmINjrNiz3/Qu2HVrlKTrRKoaOqBX YDpOP8F7Ki12beoTJyu0Nz/mpe7ORFBzPwr3KENFpsFsxi0GL9mlg8YxmPKY1SIwI8FlEw7IvV1N3 t2FxRlXg==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kUGH5-0005Te-Sv; Sun, 18 Oct 2020 21:31:31 +0000 Received: from lilium.sigma-star.at ([109.75.188.150]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kUGH3-0005SX-0F for linux-mtd@lists.infradead.org; Sun, 18 Oct 2020 21:31:29 +0000 Received: from localhost (localhost [127.0.0.1]) by lilium.sigma-star.at (Postfix) with ESMTP id CAAD21816C713; Sun, 18 Oct 2020 23:31:18 +0200 (CEST) Received: from lilium.sigma-star.at ([127.0.0.1]) by localhost (lilium.sigma-star.at [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id e0k_lvnIVV77; Sun, 18 Oct 2020 23:31:18 +0200 (CEST) Received: from lilium.sigma-star.at ([127.0.0.1]) by localhost (lilium.sigma-star.at [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id kLkPh2HFQ1iH; Sun, 18 Oct 2020 23:31:18 +0200 (CEST) From: Richard Weinberger To: linux-mtd@lists.infradead.org Subject: [RFC][PATCH 1/3] spi-nor: Add SPI_NOR_NO_WIP Date: Sun, 18 Oct 2020 23:31:01 +0200 Message-Id: <20201018213103.28798-1-richard@nod.at> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201018_173129_170764_7EF40E94 X-CRM114-Status: GOOD ( 13.31 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 T_SPF_PERMERROR SPF: test of record failed (permerror) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Richard Weinberger , tudor.ambarus@microchip.com, vigneshr@ti.com, miquel.raynal@bootlin.com Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Some flashes have their WIP bit hardwired to 0. They are always ready and there there is no need query the status register after a write command. Signed-off-by: Richard Weinberger --- drivers/mtd/spi-nor/core.c | 6 +++++- drivers/mtd/spi-nor/core.h | 2 ++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c index 0369d98b2d12..eb01a0798087 100644 --- a/drivers/mtd/spi-nor/core.c +++ b/drivers/mtd/spi-nor/core.c @@ -546,8 +546,12 @@ static void spi_nor_clear_sr(struct spi_nor *nor) */ static int spi_nor_sr_ready(struct spi_nor *nor) { - int ret = spi_nor_read_sr(nor, nor->bouncebuf); + int ret; + + if (nor->flags & SPI_NOR_NO_WIP) + return 1; + ret = spi_nor_read_sr(nor, nor->bouncebuf); if (ret) return ret; diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h index 6f2f6b27173f..621202fda5d0 100644 --- a/drivers/mtd/spi-nor/core.h +++ b/drivers/mtd/spi-nor/core.h @@ -311,6 +311,8 @@ struct flash_info { * BP3 is bit 6 of status register. * Must be used with SPI_NOR_4BIT_BP. */ +#define SPI_NOR_NO_WIP BIT(19) /* Flash is always reads, WIP status bit + has no meaning. */ /* Part specific fixup hooks. */ const struct spi_nor_fixups *fixups;