From patchwork Mon Jan 28 16:37:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loys Ollivier X-Patchwork-Id: 156795 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp3631091jaa; Mon, 28 Jan 2019 08:38:33 -0800 (PST) X-Google-Smtp-Source: ALg8bN70K8FO73LHtaJX4HRvKbR1+SMuPfFb1OYuDPeCczd/25CLRBlmL1j5QoI5vD2nqhMWsRv7 X-Received: by 2002:a17:902:e085:: with SMTP id cb5mr22187796plb.24.1548693513927; Mon, 28 Jan 2019 08:38:33 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548693513; cv=none; d=google.com; s=arc-20160816; b=It1sbG5HkCZjEAkD7uSe7SI3XIMO4XSilZwJwj7zOuDq65Ew/9SlTdev7hamFCtoda Q76hCp7Dr9xUwdbilu1SwIOVoJLsIasf8Gh4+5I/TTRCmVAfttrWxea2bA72c7VdihvD 0eM0mxxDhRk4hzJDO+V/a8XgDiF1Um5ibI4ekeLK11KQfYNP/SU3hliiuWKBlcsIHV0N Ej9A+H76zzPR9MFRZVhZ/Iur3SLZmwtPxYtucCrgI73QV0bplcVhIaCPyEPiC304yVxr fYN1RbYvgbswHEQOFiTuO6xZpNfYjtUq4SGEyEKWm5AXb54CRDxae3t1oko6AivEu0xR BGng== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature; bh=9TWS3RWKZyY10HyUQ8/8Pkd3n2zCGA7KyKif2utYLQk=; b=tBqAMWuHnsSkld231zqF2Au9ChxTl4yZvnKOhlBtUMeAyEhMqteTN7WhzRf1YgbMim jFE31TMzdSGmN7SPAK6Txuu6n7Vui3Xlizysml27max/r4O0wKoCRzJfhlH3z6y9zNAX ATAIqK/EUZnNYbznhz/1dBPXTpbJaao4Dqo+vhypRqBpdG6jRt6f/cV7I0qReummto/q uLoWs9P3cFvDliy2XsDYb45j3FiSbp3k9xvyih2XeI9RSo6Ru9gvOfSaDxt1/jr1eN1L kbs/nQ0BhxQmozzxuPnPSTcWyTfZaOqinlTSR4aueNC2MB2REMqbZ6no6oySYHyDVY/k QsbQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=RDmU414o; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id i33si15442340pld.329.2019.01.28.08.38.33; Mon, 28 Jan 2019 08:38:33 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=RDmU414o; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390297AbfA1Qib (ORCPT + 31 others); Mon, 28 Jan 2019 11:38:31 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:38620 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389969AbfA1QiK (ORCPT ); Mon, 28 Jan 2019 11:38:10 -0500 Received: by mail-wr1-f67.google.com with SMTP id v13so18767728wrw.5 for ; Mon, 28 Jan 2019 08:38:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9TWS3RWKZyY10HyUQ8/8Pkd3n2zCGA7KyKif2utYLQk=; b=RDmU414oN71nkBAYiPqn/5DnY9a/u9LMT3qHlV2ydHCc9+jtKa3TZNdEJgRBEKLjco NI+Lb1XZrxNIUcye9zYNtrllkeaj2GBJoJI7Z/i1XARKPFGR9kWhG+lXT2jrRFEJnFXG fb0nNllUVAVqtLBaoWLKoW9l+FHgd0sKaMl5VY5QMFASIbkKM3vKMmKsLdNCuDCWoG46 0AMutNJrNG1RtjHGwSWyW5Q7n5J90mjXDurK03szScyb9cpynPLrpT31fd8bU0tOTEb2 EzYmx8T2acxvSwN8Brv/qxA6tYytvzdG1jBUYjMrnKEiND2F1CQCHlEcU9+/R2aYozSO qW8A== 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=9TWS3RWKZyY10HyUQ8/8Pkd3n2zCGA7KyKif2utYLQk=; b=tX1sSRTCD5/gec7LLd/X7iciXbfuNrg2VtlYikSNRrmd2MeiujAaRKdJTTtiAT423e 0ZSLXnSaA4UBjfbh9R8v3vTRk3Z16j3QUerFFjy8P+/LoofleCfI5MESI5Yj8ViOBiKp mODuehO0yGoqNfvs+XJ80afCwRbzSvdgtMHBNLuMgpV9FFc5k7I/18VORW5RI/BPtjjg Ej97MmtnyaH2xtbqIzRNMbK2tD40qxQfsbqJm70J0te8XTczFLcOduD4A0U9amUzYsZ1 DzT70v0TBPd/t0m9TrRwRW6phAhIuGIIOB5U+tHLhVEDKEy9TGCRKRlB3WH1Fgv+ZSDQ hvqQ== X-Gm-Message-State: AJcUukdFYwGdZGCI66gnl9JQMUut//uBYV/u/uCju4suuBZxhlSEX6kk 8ZemQfkExFMvDFqzHk9ULaxBJQ== X-Received: by 2002:a5d:5182:: with SMTP id k2mr22490514wrv.121.1548693488056; Mon, 28 Jan 2019 08:38:08 -0800 (PST) Received: from loys-ubuntu-BY1835A49200471.thefacebook.com ([2620:10d:c092:180::1:d40b]) by smtp.googlemail.com with ESMTPSA id s3sm52388982wmj.23.2019.01.28.08.38.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 28 Jan 2019 08:38:07 -0800 (PST) From: Loys Ollivier To: devicetree@vger.kernel.org, Johan Hovold Cc: Loys Ollivier , Rob Herring , Mark Rutland , linux-kernel@vger.kernel.org, Kevin Hilman , linux-amlogic@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Martin Blumenstingl Subject: [PATCH v3 2/4] dt-bindings: gnss: add mediatek binding Date: Mon, 28 Jan 2019 17:37:59 +0100 Message-Id: <1548693481-1162-3-git-send-email-lollivier@baylibre.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548693481-1162-1-git-send-email-lollivier@baylibre.com> References: <1548693481-1162-1-git-send-email-lollivier@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add binding for Mediatek-based GNSS receivers. Signed-off-by: Loys Ollivier --- v3: Removed the I2C and SPI interfaces references. Removed the "mediatek,mt3339" compatible line. Added the optional propertied (reset, fix) Added the pin names for the optional properties. v2: Renamed bindings from Globaltop/gtop to Mediatek/mtk. Moved current-speed as an optional propertie. Removed the status line in the example. Added "mediatek,mt3339" compatible. .../devicetree/bindings/gnss/mediatek.txt | 37 ++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/devicetree/bindings/gnss/mediatek.txt -- 2.7.4 diff --git a/Documentation/devicetree/bindings/gnss/mediatek.txt b/Documentation/devicetree/bindings/gnss/mediatek.txt new file mode 100644 index 000000000000..00650d81c5c8 --- /dev/null +++ b/Documentation/devicetree/bindings/gnss/mediatek.txt @@ -0,0 +1,37 @@ +Mediatek-based GNSS Receiver DT binding + +Mediatek chipsets are used in GNSS-receiver modules produced by several +vendors and can use an UART interface. + +Please see Documentation/devicetree/bindings/gnss/gnss.txt for generic +properties. + +Required properties: + +- compatible : Must be + + "globaltop,pa6h" + +- vcc-supply : Main voltage regulator (pin name: VCC) + +Optional properties: + +- gtop,reset-gpios : GPIO used to reset the device + (pin name: RESET, NRESET) +- gtop,fix-gpios : GPIO used to determine device position fix state + (pin name: FIX, 3D_FIX) +- timepulse-gpios : Time pulse GPIO (pin name: PPS1, 1PPS) +- v-bckp-supply : Backup voltage regulator + (pin name: VBAT, VBACKUP) +- current-speed : Default UART baud rate + +Example: + +serial@1234 { + compatible = "ns16550a"; + + gnss { + compatible = "globaltop,pa6h"; + vcc-supply = <&vcc_3v3>; + }; +}; From patchwork Mon Jan 28 16:38:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loys Ollivier X-Patchwork-Id: 156793 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp3630808jaa; Mon, 28 Jan 2019 08:38:16 -0800 (PST) X-Google-Smtp-Source: ALg8bN4lkCbLOv5nm94wXIaFYTFHd8T/VXTnNZDrs0bI8MQLucP9WT1jMhdAWizfSuHoILYgoRis X-Received: by 2002:a17:902:680f:: with SMTP id h15mr22140187plk.40.1548693496018; Mon, 28 Jan 2019 08:38:16 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548693496; cv=none; d=google.com; s=arc-20160816; b=vfzRjj+jRmCfXoS07gN/BkzZvDWJ5fRzNJ/1ZAzph0h24qr+reKj9w0lWPC+yIVc74 yXlkFlSsHxIBNDUffblH3yulEkTdOLt2sMJQB4XoMiA41QVRsY922NElymYCrr/OIqxN SMYpt5vYahCPIhq+6opoi0mw00prvEOxdIPB0/Y3Pm3jH70AA2F/bA+LeyKKGXnEsDoz vQgQiVIdDKIsQwasqiSfgGY0235HxzWG9pPYt6pP1TxAztjNNOu5bkBkUOh9WJBArhY9 Tk4LZ1El4GmcUm34kbqKR4lwC52TAfUxXCaknjec7rMhGsUv2PZTrVXg4ijuF0hazt7e wdJA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature; bh=fyBQQHTr8PUOvMNC5TSDB366cWfD8A0+KHCn5LVVNH8=; b=B8YUoyRC0SbghGqrZA5NM9D+VEjSii5ffBWXuXniA9jIBhTmUy01rM915mYvyVV4qt BOIEceOui4L2ggaHrdurWs67SF9EelLotkZGqeAytgyupuVavNTLdRNDlxATVHBeYNIA sx7j70GzRqL2jqzOy4lpVUhIB3mJ8B7AA+Z2kRuQyK8LVPMlrH2fGbPR8883pZlnz5nr bb7WXkxt4WwwfV+poly6eF9vJRqldLfb5+3/e++QyMUonUcvqb5UV+giQu4TAb3juSXa l1ytO3KZLVU2E8USOS2YlYWTU8+qMW7u0yOSqYkS9DDxmfnp8kcoRMxUrp6W+duxlwnR eu0g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=HYqf2z5e; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. 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Note that MTK receivers support a subset of NMEA 0183 with vendor extensions. Signed-off-by: Loys Ollivier --- v3: Moved the gnss_type_names string addition to this patch. Edited the commit message to remove the reference to a vendor protocol. v2: renamed from GTOP to MTK. drivers/gnss/core.c | 1 + include/linux/gnss.h | 1 + 2 files changed, 2 insertions(+) -- 2.7.4 diff --git a/drivers/gnss/core.c b/drivers/gnss/core.c index 4291a0dd22aa..320cfca80d5f 100644 --- a/drivers/gnss/core.c +++ b/drivers/gnss/core.c @@ -334,6 +334,7 @@ static const char * const gnss_type_names[GNSS_TYPE_COUNT] = { [GNSS_TYPE_NMEA] = "NMEA", [GNSS_TYPE_SIRF] = "SiRF", [GNSS_TYPE_UBX] = "UBX", + [GNSS_TYPE_MTK] = "MTK", }; static const char *gnss_type_name(struct gnss_device *gdev) diff --git a/include/linux/gnss.h b/include/linux/gnss.h index 43546977098c..36968a0f33e8 100644 --- a/include/linux/gnss.h +++ b/include/linux/gnss.h @@ -22,6 +22,7 @@ enum gnss_type { GNSS_TYPE_NMEA = 0, GNSS_TYPE_SIRF, GNSS_TYPE_UBX, + GNSS_TYPE_MTK, GNSS_TYPE_COUNT }; From patchwork Mon Jan 28 16:38:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Loys Ollivier X-Patchwork-Id: 156794 Delivered-To: patch@linaro.org Received: by 2002:a02:48:0:0:0:0:0 with SMTP id 69csp3630869jaa; Mon, 28 Jan 2019 08:38:21 -0800 (PST) X-Google-Smtp-Source: ALg8bN7QjYL4VpysUL6Nzx46Fn5iKc4l3VQo6dt7CwVcDn549CEm/4F4snRFGL1BlcWipGJLGkGf X-Received: by 2002:a62:9f1b:: with SMTP id g27mr21896262pfe.87.1548693501156; Mon, 28 Jan 2019 08:38:21 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1548693501; cv=none; d=google.com; s=arc-20160816; b=MYAYBX8ZZOJdWyNJWApGQh06b9AswR12q5LSy73jm7iTrwXcQy4K4c/B/sP2GYpkLR RB8tLTiEEaRktH8clIUZyDNhvJpwNGCzG0WtVwJNNz48AhdaQ2WqpkFuQOS8PDGLwOai b/gBKefo1cpks+P9s82+T7MJHZdchxMo5yzWBg9mZnJS4r3QEc2RrMQ7AGhime6lYjKV /CShGRiiEJZ3rIxBnzai382c17aAVWtoHNmBRuXkCNt3Gl71fNNGl2a5KQAzeqxgbCuO atiFS586ybVXa7LMFGPRO+mQGeJVwSW9cIGWkCHj0UsAYvhW/nKlILAogI6J8lRhGulj kZQw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature; bh=J7q2ZjQCinm0IA/wotZbsDzW17KZqQK/HytBY9aOmww=; b=HZr3ymKFxOTWPV9I+2UGrrX8aYl1FhjYLG9avrhVE3I0gzCUL6Sa+CKpMjAJnMpNIz fGgcx07zC4bh3Xa+D3qXO2IzaznL/NZpSypGnMIJ6MvxFoh5Kank7a7LjcIhVmZHUaPF 6Ro14HZmFnV2vjHtjFk2Wk33EvNtceacLOx+a3enJTGVrtg5+/znWPuug1Yl/XYKG3FX MwIyHQnCSepLu52nuxBdeVpHkop59ETVW2dJwiLEbKo8SgIT5hNviXzUnxTQ3BUoETPH odyKoJur7z0RlgXb6osDuCzfdbZ9x8qEisO0ZhCDsYzjr2+OrHTtdbutXKW/l7j9aPsv 6Wdw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=jCkIK7qO; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q14si10448931pgg.433.2019.01.28.08.38.20; Mon, 28 Jan 2019 08:38:21 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@baylibre-com.20150623.gappssmtp.com header.s=20150623 header.b=jCkIK7qO; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390563AbfA1QiS (ORCPT + 31 others); Mon, 28 Jan 2019 11:38:18 -0500 Received: from mail-wr1-f66.google.com ([209.85.221.66]:41798 "EHLO mail-wr1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390562AbfA1QiM (ORCPT ); Mon, 28 Jan 2019 11:38:12 -0500 Received: by mail-wr1-f66.google.com with SMTP id x10so18766081wrs.8 for ; Mon, 28 Jan 2019 08:38:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=J7q2ZjQCinm0IA/wotZbsDzW17KZqQK/HytBY9aOmww=; b=jCkIK7qOU+oQ1Qf34xBNH44bu15/Eyc78HQubpYXfrNqRhzbGg3DLSspO5WFomgfxQ ci7q5n3OMQVcMVv4ouYs3jdw8Bl9a29EfuewI2VUXE+o99WXguBy4COns+R1Jy4pUuPO GCAKPLG+EJpDA1hrhDo2vLPv1oWl4fhuwHBI2/qksQuGYUkCa+Z+Fi3Ng1ipN4fh9PPU NLIrrFaHrfT0pVMt/FfGAd8c2ldttUAuWPUMA6fYtinkc2rI9D0uSos4KvDod3NPbZIR KNNYoff6rjsNQWcGRMxK5grcIt2BEhRZ9c4Q8P+6l6g91fcANuGpSC9G7rDhAd6fFCGb IEPQ== 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=J7q2ZjQCinm0IA/wotZbsDzW17KZqQK/HytBY9aOmww=; b=V1D/CRzjO5XP/UFsGQCx+WaqOJheRIQhE86Uqh6KiItbB1F1TkgdpgJJ2ElWOSEY0a Sp6eER+Ny5cPL3JCXIXF3Rb1ifkLGK/UCfQJ0ZbTER5gPPo9KQKBZi3rMkzofoCnYYo0 JsDho90u6LdWvm95Ag0zO4+blco5HWgPLn90cX4rKqrUk5OFnA7pIbzAcKMJtTwZdPxP H5qFcgqdKV1+NabgYIlciyUl5lBzK8tKBkIl17kakrO8sB081RD8ipraGzEFgNK7M2QK fFYFa0xpOYnebBxRecpjm9mlEGVFrm8LXq3us7zPvfj8hLjJO3p82zkVQ8MSPX620rAP kngw== X-Gm-Message-State: AJcUukdkrgSpZ+xVS0l2aV8rTZzV2PBajEmRG1YzVbQr0Fqd15pECu55 QZu23E+6yzjHWfsGS3dERs4HpQ== X-Received: by 2002:adf:ae41:: with SMTP id u1mr21558974wrd.20.1548693490439; Mon, 28 Jan 2019 08:38:10 -0800 (PST) Received: from loys-ubuntu-BY1835A49200471.thefacebook.com ([2620:10d:c092:180::1:d40b]) by smtp.googlemail.com with ESMTPSA id s3sm52388982wmj.23.2019.01.28.08.38.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 28 Jan 2019 08:38:09 -0800 (PST) From: Loys Ollivier To: devicetree@vger.kernel.org, Johan Hovold Cc: Loys Ollivier , Rob Herring , Mark Rutland , linux-kernel@vger.kernel.org, Kevin Hilman , linux-amlogic@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Martin Blumenstingl Subject: [PATCH v3 4/4] gnss: add driver for mediatek receivers Date: Mon, 28 Jan 2019 17:38:01 +0100 Message-Id: <1548693481-1162-5-git-send-email-lollivier@baylibre.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548693481-1162-1-git-send-email-lollivier@baylibre.com> References: <1548693481-1162-1-git-send-email-lollivier@baylibre.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add driver for serial-connected Mediatek-based GNSS receivers. These devices typically boot transmitting vendor specific NMEA output sequences. The serial port bit rate is read from the device tree "current-speed". Note that the driver uses the generic GNSS serial implementation and therefore essentially only manages power abstracted into three power states: ACTIVE, STANDBY, and OFF. For mediatek receivers with a main supply and no enable-gpios, this simply means that the main supply is disabled in STANDBY and OFF (the optional backup supply is kept enabled while the driver is bound). Note that the timepulse-support is left unimplemented. Signed-off-by: Loys Ollivier --- v3: Sorted the Kconfig and Makefile Retained the original Copyright Removed "mediatek,mt3339" compatible. v2: Renamed from gtop/Globaltop to mtk/Mediatek. Added "mediatek,mt3339" compatible. drivers/gnss/Kconfig | 13 +++++ drivers/gnss/Makefile | 3 + drivers/gnss/mtk.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 168 insertions(+) create mode 100644 drivers/gnss/mtk.c -- 2.7.4 diff --git a/drivers/gnss/Kconfig b/drivers/gnss/Kconfig index 6abc88514512..6d8c8027e1cd 100644 --- a/drivers/gnss/Kconfig +++ b/drivers/gnss/Kconfig @@ -15,6 +15,19 @@ if GNSS config GNSS_SERIAL tristate +config GNSS_MTK_SERIAL + tristate "Mediatek GNSS receiver support" + depends on SERIAL_DEV_BUS + select GNSS_SERIAL + help + Say Y here if you have a Mediatek-based GNSS receiver which uses a + serial interface. + + To compile this driver as a module, choose M here: the module will + be called gnss-mtk. + + If unsure, say N. + config GNSS_SIRF_SERIAL tristate "SiRFstar GNSS receiver support" depends on SERIAL_DEV_BUS diff --git a/drivers/gnss/Makefile b/drivers/gnss/Makefile index 5cf0ebe0330a..451f11401ecc 100644 --- a/drivers/gnss/Makefile +++ b/drivers/gnss/Makefile @@ -9,6 +9,9 @@ gnss-y := core.o obj-$(CONFIG_GNSS_SERIAL) += gnss-serial.o gnss-serial-y := serial.o +obj-$(CONFIG_GNSS_MTK_SERIAL) += gnss-mtk.o +gnss-mtk-y := mtk.o + obj-$(CONFIG_GNSS_SIRF_SERIAL) += gnss-sirf.o gnss-sirf-y := sirf.o diff --git a/drivers/gnss/mtk.c b/drivers/gnss/mtk.c new file mode 100644 index 000000000000..a5aad08fb9d7 --- /dev/null +++ b/drivers/gnss/mtk.c @@ -0,0 +1,152 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Mediatek GNSS receiver driver + * + * Copyright (C) 2018 Johan Hovold + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "serial.h" + +struct mtk_data { + struct regulator *v_bckp; + struct regulator *vcc; +}; + +static int mtk_set_active(struct gnss_serial *gserial) +{ + struct mtk_data *data = gnss_serial_get_drvdata(gserial); + int ret; + + ret = regulator_enable(data->vcc); + if (ret) + return ret; + + return 0; +} + +static int mtk_set_standby(struct gnss_serial *gserial) +{ + struct mtk_data *data = gnss_serial_get_drvdata(gserial); + int ret; + + ret = regulator_disable(data->vcc); + if (ret) + return ret; + + return 0; +} + +static int mtk_set_power(struct gnss_serial *gserial, + enum gnss_serial_pm_state state) +{ + switch (state) { + case GNSS_SERIAL_ACTIVE: + return mtk_set_active(gserial); + case GNSS_SERIAL_OFF: + case GNSS_SERIAL_STANDBY: + return mtk_set_standby(gserial); + } + + return -EINVAL; +} + +static const struct gnss_serial_ops mtk_gserial_ops = { + .set_power = mtk_set_power, +}; + +static int mtk_probe(struct serdev_device *serdev) +{ + struct gnss_serial *gserial; + struct mtk_data *data; + int ret; + + gserial = gnss_serial_allocate(serdev, sizeof(*data)); + if (IS_ERR(gserial)) { + ret = PTR_ERR(gserial); + return ret; + } + + gserial->ops = &mtk_gserial_ops; + + gserial->gdev->type = GNSS_TYPE_MTK; + + data = gnss_serial_get_drvdata(gserial); + + data->vcc = devm_regulator_get(&serdev->dev, "vcc"); + if (IS_ERR(data->vcc)) { + ret = PTR_ERR(data->vcc); + goto err_free_gserial; + } + + data->v_bckp = devm_regulator_get_optional(&serdev->dev, "v-bckp"); + if (IS_ERR(data->v_bckp)) { + ret = PTR_ERR(data->v_bckp); + if (ret == -ENODEV) + data->v_bckp = NULL; + else + goto err_free_gserial; + } + + if (data->v_bckp) { + ret = regulator_enable(data->v_bckp); + if (ret) + goto err_free_gserial; + } + + ret = gnss_serial_register(gserial); + if (ret) + goto err_disable_v_bckp; + + return 0; + +err_disable_v_bckp: + if (data->v_bckp) + regulator_disable(data->v_bckp); +err_free_gserial: + gnss_serial_free(gserial); + + return ret; +} + +static void mtk_remove(struct serdev_device *serdev) +{ + struct gnss_serial *gserial = serdev_device_get_drvdata(serdev); + struct mtk_data *data = gnss_serial_get_drvdata(gserial); + + gnss_serial_deregister(gserial); + if (data->v_bckp) + regulator_disable(data->v_bckp); + gnss_serial_free(gserial); +}; + +#ifdef CONFIG_OF +static const struct of_device_id mtk_of_match[] = { + { .compatible = "globaltop,pa6h" }, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_of_match); +#endif + +static struct serdev_device_driver mtk_driver = { + .driver = { + .name = "gnss-mtk", + .of_match_table = of_match_ptr(mtk_of_match), + .pm = &gnss_serial_pm_ops, + }, + .probe = mtk_probe, + .remove = mtk_remove, +}; +module_serdev_device_driver(mtk_driver); + +MODULE_AUTHOR("Loys Ollivier "); +MODULE_DESCRIPTION("Mediatek GNSS receiver driver"); +MODULE_LICENSE("GPL v2");