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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 6210CC3A5A2 for ; Tue, 10 Sep 2019 09:19:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 434B12168B for ; Tue, 10 Sep 2019 09:19:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389563AbfIJJTw (ORCPT ); Tue, 10 Sep 2019 05:19:52 -0400 Received: from smtp2.goneo.de ([85.220.129.33]:33154 "EHLO smtp2.goneo.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729360AbfIJJTv (ORCPT ); Tue, 10 Sep 2019 05:19:51 -0400 Received: from localhost (localhost [127.0.0.1]) by smtp2.goneo.de (Postfix) with ESMTP id 66E5823F688; Tue, 10 Sep 2019 11:19:49 +0200 (CEST) X-Virus-Scanned: by goneo Received: from smtp2.goneo.de ([127.0.0.1]) by localhost (smtp2.goneo.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mHjNSwEED_oc; Tue, 10 Sep 2019 11:19:48 +0200 (CEST) Received: from lem-wkst-02.lemonage.de. (hq.lemonage.de [87.138.178.34]) by smtp2.goneo.de (Postfix) with ESMTPA id BE12323F063; Tue, 10 Sep 2019 11:19:47 +0200 (CEST) From: Lars Poeschel To: Kate Stewart , "Gustavo A. R. Silva" , Kees Cook , Allison Randal , Greg Kroah-Hartman , Lars Poeschel , Thomas Gleixner , Jilayne Lovejoy , Steve Winslow , netdev@vger.kernel.org (open list:NFC SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Cc: Johan Hovold Subject: [PATCH v7 3/7] nfc: pn533: Add dev_up/dev_down hooks to phy_ops Date: Tue, 10 Sep 2019 11:33:09 +0200 Message-Id: <20190910093312.1981-1-poeschel@lemonage.de> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This adds hooks for dev_up and dev_down to the phy_ops. They are optional. The idea is to inform the phy driver when the nfc chip is really going to be used. When it is not used, the phy driver can suspend it's interface to the nfc chip to save some power. The nfc chip is considered not in use before dev_up and after dev_down. Cc: Johan Hovold Signed-off-by: Lars Poeschel --- Changes in v6: - Rebased the patch series on v5.3-rc5 Changes in v5: - (dev->phy_ops->dev_up) instead (dev->phy_ops) Changes in v4: - This patch is new in v4 drivers/nfc/pn533/pn533.c | 12 +++++++++++- drivers/nfc/pn533/pn533.h | 9 +++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/pn533/pn533.c b/drivers/nfc/pn533/pn533.c index a172a32aa9d9..64836c727aee 100644 --- a/drivers/nfc/pn533/pn533.c +++ b/drivers/nfc/pn533/pn533.c @@ -2458,6 +2458,9 @@ static int pn533_dev_up(struct nfc_dev *nfc_dev) { struct pn533 *dev = nfc_get_drvdata(nfc_dev); + if (dev->phy_ops->dev_up) + dev->phy_ops->dev_up(dev); + if (dev->device_type == PN533_DEVICE_PN532) { int rc = pn532_sam_configuration(nfc_dev); @@ -2470,7 +2473,14 @@ static int pn533_dev_up(struct nfc_dev *nfc_dev) static int pn533_dev_down(struct nfc_dev *nfc_dev) { - return pn533_rf_field(nfc_dev, 0); + struct pn533 *dev = nfc_get_drvdata(nfc_dev); + int ret; + + ret = pn533_rf_field(nfc_dev, 0); + if (dev->phy_ops->dev_down && !ret) + dev->phy_ops->dev_down(dev); + + return ret; } static struct nfc_ops pn533_nfc_ops = { diff --git a/drivers/nfc/pn533/pn533.h b/drivers/nfc/pn533/pn533.h index 8bf9d6ece0f5..570ee0a3e832 100644 --- a/drivers/nfc/pn533/pn533.h +++ b/drivers/nfc/pn533/pn533.h @@ -207,6 +207,15 @@ struct pn533_phy_ops { struct sk_buff *out); int (*send_ack)(struct pn533 *dev, gfp_t flags); void (*abort_cmd)(struct pn533 *priv, gfp_t flags); + /* + * dev_up and dev_down are optional. + * They are used to inform the phy layer that the nfc chip + * is going to be really used very soon. The phy layer can then + * bring up it's interface to the chip and have it suspended for power + * saving reasons otherwise. + */ + void (*dev_up)(struct pn533 *priv); + void (*dev_down)(struct pn533 *priv); }; -- 2.23.0