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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1B28C3F2C6 for ; Tue, 3 Mar 2020 07:21:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7BDE320726 for ; Tue, 3 Mar 2020 07:21:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727642AbgCCHV4 (ORCPT ); Tue, 3 Mar 2020 02:21:56 -0500 Received: from twhmllg3.macronix.com ([211.75.127.131]:31770 "EHLO TWHMLLG3.macronix.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727612AbgCCHVx (ORCPT ); Tue, 3 Mar 2020 02:21:53 -0500 Received: from localhost.localdomain ([172.17.195.96]) by TWHMLLG3.macronix.com with ESMTP id 0237LRLC023026; Tue, 3 Mar 2020 15:21:31 +0800 (GMT-8) (envelope-from masonccyang@mxic.com.tw) From: Mason Yang To: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com Cc: frieder.schrempf@kontron.de, tglx@linutronix.de, stefan@agner.ch, juliensu@mxic.com.tw, allison@lohutok.net, linux-kernel@vger.kernel.org, bbrezillon@kernel.org, rfontana@redhat.com, linux-mtd@lists.infradead.org, yuehaibing@huawei.com, s.hauer@pengutronix.de, Mason Yang Subject: [PATCH v3 3/4] mtd: rawnand: Add support manufacturer specific suspend/resume operation Date: Tue, 3 Mar 2020 15:21:23 +0800 Message-Id: <1583220084-10890-4-git-send-email-masonccyang@mxic.com.tw> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1583220084-10890-1-git-send-email-masonccyang@mxic.com.tw> References: <1583220084-10890-1-git-send-email-masonccyang@mxic.com.tw> X-MAIL: TWHMLLG3.macronix.com 0237LRLC023026 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Patch nand_suspend() & nand_resume() for manufacturer specific suspend/resume operation. Signed-off-by: Mason Yang Reported-by: kbuild test robot Reviewed-by: Miquel Raynal --- drivers/mtd/nand/raw/nand_base.c | 11 ++++++++--- include/linux/mtd/rawnand.h | 4 ++++ 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index 769be81..b44e460 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4327,7 +4327,9 @@ static int nand_suspend(struct mtd_info *mtd) struct nand_chip *chip = mtd_to_nand(mtd); mutex_lock(&chip->lock); - chip->suspended = 1; + if (chip->_suspend) + if (!chip->_suspend(chip)) + chip->suspended = 1; mutex_unlock(&chip->lock); return 0; @@ -4342,11 +4344,14 @@ static void nand_resume(struct mtd_info *mtd) struct nand_chip *chip = mtd_to_nand(mtd); mutex_lock(&chip->lock); - if (chip->suspended) + if (chip->suspended) { + if (chip->_resume) + chip->_resume(chip); chip->suspended = 0; - else + } else { pr_err("%s called for a chip which is not in suspended state\n", __func__); + } mutex_unlock(&chip->lock); } diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index bc2fa3c..c0055ed 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1064,6 +1064,8 @@ struct nand_legacy { * @lock: lock protecting the suspended field. Also used to * serialize accesses to the NAND device. * @suspended: set to 1 when the device is suspended, 0 when it's not. + * @_suspend: [REPLACEABLE] specific NAND device suspend operation + * @_resume: [REPLACEABLE] specific NAND device resume operation * @bbt: [INTERN] bad block table pointer * @bbt_td: [REPLACEABLE] bad block table descriptor for flash * lookup. @@ -1119,6 +1121,8 @@ struct nand_chip { struct mutex lock; unsigned int suspended : 1; + int (*_suspend)(struct nand_chip *chip); + void (*_resume)(struct nand_chip *chip); uint8_t *oob_poi; struct nand_controller *controller; -- 1.9.1