From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-713482-1519321854-2-3310839052542024087 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='com', MailFrom='org', XOriginatingCountry='UNK' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-serial-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1519321854; b=UO5xr9RJRPmAc/g/jyFlETJJc+U0BupvHlpfCB5CPIAwDX/ W8GXu7l0W+Z5ldnCZjfsvST/2R2EX0X86RGadRZGK764LwfyfKc61Dxwn3I2/Y9O 7yoV86cS3LNGT8rQOIJWRhrvPvM0nU3LgTYavuej0e1HzBkuaZrBVVGdlKTq4Qj5 /pEqi3l/tw9uMmtY5tpiSVLPCtDOf4vNm8rWsr5BRdldgoC9BqAZnphD7GWTIO8F q9rsRg1R2rXfI5+usE1gACx0UgOM5f7D89YAhC10W6crwLbIB6XlJC/sZ6zgNmN0 OC7nQ0VqL90xGc1VrUa5C4CihZXS516jYifF9pQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :mime-version:content-type:sender:list-id; s=arctest; t= 1519321854; bh=rIuqJzIxhL6lh1dLVq+Qf83wnkWNbdfv4LOuE6NJGRw=; b=L DsqncHpzh8FCsItxQer6NUWbX4R5qMSJWaov2w/tKJ7fONjsqNoc3WVedZzFNyMp OObVPhYd33o7SKNuohLjnjywwY19nbkw72VZVj2nbAYk/2VNvnPDQX+s0QSUJIXD Pmn20tiDwyo7WsEKVv41DHgqfsOFcUy5DgTG7LkyTdDzdRT4ADrkf6kE/A5rgGyb 08vv3Prr1feghXFN4cUfCqD6jmOcBKbIVaAR4+k/hVWjfV2IsPaN2kIdhGj71zr6 XCHh54Wr6QLKeqmxipcXDBKd1pSjJb8nxhWLNhiclS3qOq163IXT044rYN5BS+bR sjWz68ezKaCRYdibehpSA== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=huawei.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-serial-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=huawei.com header.result=pass header_is_org_domain=yes Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=huawei.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-serial-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=huawei.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933555AbeBVRui (ORCPT ); Thu, 22 Feb 2018 12:50:38 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:5663 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933581AbeBVRuE (ORCPT ); Thu, 22 Feb 2018 12:50:04 -0500 From: John Garry To: , , , , , , CC: , , Subject: [RFC PATCH 0/2] serial: 8250_dw: IO space + polling mode support Date: Fri, 23 Feb 2018 02:42:01 +0800 Message-ID: <1519324923-196857-1-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-serial-owner@vger.kernel.org X-Mailing-List: linux-serial@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: There is a requirement for supporting an 8250-compatible UART with the following profile/features: - platform device - polling mode (i.e. no interrupt support) - ACPI FW - IO port iotype - 16550-compatible For OF, we have 8250_of.c, and for PNP device we have 8250_pnp.c drivers. However there does not seem to any driver satisfying the above requirements. So this RFC is to find opinion on modifying the Synopsys DW 8250_dw.c driver to support these generic features. With patch 2/2, we're relaxing the interrupt support requirement. As I mentioned in the commit log, the 8250_of.c driver seems to ignore the dt bindings, and I do the same. John Garry (2): serial: 8250_dw: add IO space support serial: 8250_dw: support polling mode drivers/tty/serial/8250/8250_dw.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) -- 1.9.1