From patchwork Fri Feb 3 23:31:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Dasu X-Patchwork-Id: 9555315 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 52A2B602B7 for ; Fri, 3 Feb 2017 23:31:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4489027F86 for ; Fri, 3 Feb 2017 23:31:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3966A28425; Fri, 3 Feb 2017 23:31:40 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.3 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM, T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EA36A27F86 for ; Fri, 3 Feb 2017 23:31:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752871AbdBCXbj (ORCPT ); Fri, 3 Feb 2017 18:31:39 -0500 Received: from mail-qt0-f196.google.com ([209.85.216.196]:33387 "EHLO mail-qt0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752816AbdBCXbj (ORCPT ); Fri, 3 Feb 2017 18:31:39 -0500 Received: by mail-qt0-f196.google.com with SMTP id n13so7744872qtc.0 for ; Fri, 03 Feb 2017 15:31:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9gCf8yr62/9kQQlDGh9RgVEh5JJBRZYHabJ60Re3ucs=; b=Q7/FIjmfga6SDOyOE/28Rc+HftGpPfyU+vPw/uefVpFWHGBwwYD6LWZSJnQbfZXfYx au7QOsXBi9CVzjsjAdCpS3WZoN9QrukRhLWFS97IcSjpa+H3N/XRG6C14Gk/RHVgKg8V w+JAr1HDKB6dlaUpzuCbffbPzL4tumsX4BATrtlSwk5ujhRYRN5UtsO2Gc/Hiux1cfqT r/gGOYhUEU5uvRxJzU+mKhleGsDBFbVmI/86KvDByf3OFOSrqAjOZS86N+UgfPg9Tlo0 XWuvjyguhNosRff2KOK4I+qOlvR67X0Y1WFlCRjFy4Udr5y9BKhD0YNkFsiO4VuTcJAq HnQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9gCf8yr62/9kQQlDGh9RgVEh5JJBRZYHabJ60Re3ucs=; b=ZpCc+ggkCkRMh8fY9rod3tyur5IBF/AAXJM2uJqqXJpS3COgfyhl8eqzUyei0cfFbM CMU8u5MmhwmAl8stQDXC3CDG/XtNI9SDRNSPZ/t1i0YFsUrqh8gVGvAH4Fld8be0sut2 xzUmRg84rDFZeP+CFVy4nUnsxS63eM6YpN9gZJDl3Rx7QoNW0Blv+KK2yc3lSZUyTFQr Qtdjsr33MntO+aAL0D0AsPY/gi82VuJQ0zVLoi3viN+hMwVNjMFLF+sI6Lp+gt9KIgNK Ig1Ub+q7EZVP0Gn3N9pxKX81acC/RXH8Hw9oXQsTT4pQ8i1AZEHQ94ez1WKefevoyVOS veWg== X-Gm-Message-State: AMke39kT/r1FgRkw6fR/VzyEEdVuSWNcsDvAcP44vDeHWlxuPYYiX6dyc9YKdghXowILBg== X-Received: by 10.55.15.234 with SMTP id 103mr16724560qkp.282.1486164698194; Fri, 03 Feb 2017 15:31:38 -0800 (PST) Received: from mail.broadcom.com ([192.19.218.250]) by smtp.gmail.com with ESMTPSA id 140sm25747914qkj.19.2017.02.03.15.31.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 03 Feb 2017 15:31:37 -0800 (PST) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Cc: linux-mtd@lists.infradead.org, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu Subject: [PATCH v1 2/5] mtd: m25p80: Added pm ops support Date: Fri, 3 Feb 2017 18:31:13 -0500 Message-Id: <1486164676-12912-3-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486164676-12912-1-git-send-email-kdasu.kdev@gmail.com> References: <1486164676-12912-1-git-send-email-kdasu.kdev@gmail.com> Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Added power management ops for resume to be able to resan spi-nor device and set it to right transfer modes in its probed state after poweron. Some SoC implementations might power down the spi-nor flash and loose its initial settings on suspend. A resume should retore the part to its probed state. Signed-off-by: Kamal Dasu --- drivers/mtd/devices/m25p80.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 9cf7fcd..4528e33 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -319,10 +319,26 @@ static int m25p_remove(struct spi_device *spi) }; MODULE_DEVICE_TABLE(of, m25p_of_table); +#ifdef CONFIG_PM_SLEEP +static int m25p_suspend(struct device *dev) +{ + return 0; +} + +static int m25p_resume(struct device *dev) +{ + struct m25p *flash = dev_get_drvdata(dev); + + return spi_nor_pm_rescan(&flash->spi-nor, NULL); +} +#endif +static SIMPLE_DEV_PM_OPS(m25p_pm_ops, m25p_suspend, m25p_resume); + static struct spi_driver m25p80_driver = { .driver = { .name = "m25p80", .of_match_table = m25p_of_table, + .pm = &m25p_pm_ops, }, .id_table = m25p_ids, .probe = m25p_probe,