From patchwork Tue Jan 8 17:58:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lubomir Rintel X-Patchwork-Id: 10752725 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D09911515 for ; Tue, 8 Jan 2019 18:01:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C011B28E5E for ; Tue, 8 Jan 2019 18:01:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B3C3428E66; Tue, 8 Jan 2019 18:01:59 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 4F50F28E5E for ; Tue, 8 Jan 2019 18:01:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=s93IuDBAQjfO873/94NRWGCrYt4BqPLqjjBEQnbVPw8=; b=SpFHxlATs005Q5 Wgdlvrh3t5hKaF0FQZoOAjte7csvq/49MRno8gUCyxjxt/Z23uAh9Z1tH/Tul55+LWZPQVkS4A1hb m64P7MzhahR0IROPuCQ5r4IInMdQ48D1Sl+S+SmahUIoq82F6vhSlIvdITjaTjRDythuGuzyvFCA5 FL1ph+E9fEjGt1bIzacXe5ThcZY+u1uXdZSjTjWlGkbPMaZvf5a2jsgG+xFkR40MwG75jd8QptveC Lk4jMoR3Ki1qvTCApAr34LagVVHAwOUEAo3qsgd2WaxO8ojytilKdSccmaqFZxVrp6xPYi6R26gn4 B/QVRIJfHjpgwej50CaA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggvhJ-0002vq-71; Tue, 08 Jan 2019 18:01:53 +0000 Received: from shell.v3.sk ([90.176.6.54]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggveg-0007Ss-VB for linux-arm-kernel@lists.infradead.org; Tue, 08 Jan 2019 17:59:39 +0000 Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 5F50810004D; Tue, 8 Jan 2019 18:59:09 +0100 (CET) Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id DmRxrrDkJ9k9; Tue, 8 Jan 2019 18:58:53 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zimbra.v3.sk (Postfix) with ESMTP id 1EC1C100055; Tue, 8 Jan 2019 18:58:34 +0100 (CET) X-Virus-Scanned: amavisd-new at zimbra.v3.sk Received: from shell.v3.sk ([127.0.0.1]) by localhost (zimbra.v3.sk [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id sHoPwIEEqCg7; Tue, 8 Jan 2019 18:58:31 +0100 (CET) Received: from belphegor.brq.redhat.com (nat-pool-brq-t.redhat.com [213.175.37.10]) by zimbra.v3.sk (Postfix) with ESMTPSA id 7EB6D100061; Tue, 8 Jan 2019 18:58:27 +0100 (CET) From: Lubomir Rintel To: Andy Shevchenko , Darren Hart , platform-driver-x86@vger.kernel.org, Russell King Subject: [PATCH v4 15/15] power: supply: olpc_battery: Add OLPC XO 1.75 support Date: Tue, 8 Jan 2019 18:58:18 +0100 Message-Id: <20190108175818.705110-16-lkundrak@v3.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190108175818.705110-1-lkundrak@v3.sk> References: <20190108175818.705110-1-lkundrak@v3.sk> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190108_095911_924338_9863FF32 X-CRM114-Status: GOOD ( 13.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree@vger.kernel.org, James Cameron , linux-pm@vger.kernel.org, x86@kernel.org, Sebastian Reichel , linux-kernel@vger.kernel.org, Lubomir Rintel , Rob Herring , Pavel Machek , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The battery and the protocol are essentially the same as OLPC XO 1.5, but the responses from the EC are LSB first. Signed-off-by: Lubomir Rintel Acked-by: Pavel Machek --- Changes since v2: - Fix the version conditional Changes since v1: - s/s16 ecword_to_cpu/u16 ecword_to_cpu/ - s/u16 ec_byte/u16 ec_word/ drivers/power/supply/Kconfig | 2 +- drivers/power/supply/olpc_battery.c | 25 +++++++++++++++++++------ 2 files changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig index 67a3bb26da39..66e4d1958de3 100644 --- a/drivers/power/supply/Kconfig +++ b/drivers/power/supply/Kconfig @@ -151,7 +151,7 @@ config BATTERY_PMU config BATTERY_OLPC tristate "One Laptop Per Child battery" - depends on OLPC + depends on OLPC_EC help Say Y to enable support for the battery on the OLPC laptop. diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c index 8ebb4284cf05..e32c1e457026 100644 --- a/drivers/power/supply/olpc_battery.c +++ b/drivers/power/supply/olpc_battery.c @@ -56,6 +56,7 @@ struct olpc_battery_data { struct power_supply *olpc_bat; char bat_serial[17]; int new_proto; + int little_endian; }; /********************************************************************* @@ -321,6 +322,14 @@ static int olpc_bat_get_voltage_max_design(union power_supply_propval *val) return ret; } +static u16 ecword_to_cpu(struct olpc_battery_data *data, u16 ec_word) +{ + if (data->little_endian) + return le16_to_cpu(ec_word); + else + return be16_to_cpu(ec_word); +} + /********************************************************************* * Battery properties *********************************************************************/ @@ -393,7 +402,7 @@ static int olpc_bat_get_property(struct power_supply *psy, if (ret) return ret; - val->intval = (s16)be16_to_cpu(ec_word) * 9760L / 32; + val->intval = ecword_to_cpu(data, ec_word) * 9760L / 32; break; case POWER_SUPPLY_PROP_CURRENT_AVG: case POWER_SUPPLY_PROP_CURRENT_NOW: @@ -401,7 +410,7 @@ static int olpc_bat_get_property(struct power_supply *psy, if (ret) return ret; - val->intval = (s16)be16_to_cpu(ec_word) * 15625L / 120; + val->intval = ecword_to_cpu(data, ec_word) * 15625L / 120; break; case POWER_SUPPLY_PROP_CAPACITY: ret = olpc_ec_cmd(EC_BAT_SOC, NULL, 0, &ec_byte, 1); @@ -432,21 +441,21 @@ static int olpc_bat_get_property(struct power_supply *psy, if (ret) return ret; - val->intval = (s16)be16_to_cpu(ec_word) * 10 / 256; + val->intval = ecword_to_cpu(data, ec_word) * 10 / 256; break; case POWER_SUPPLY_PROP_TEMP_AMBIENT: ret = olpc_ec_cmd(EC_AMB_TEMP, NULL, 0, (void *)&ec_word, 2); if (ret) return ret; - val->intval = (int)be16_to_cpu(ec_word) * 10 / 256; + val->intval = (int)ecword_to_cpu(data, ec_word) * 10 / 256; break; case POWER_SUPPLY_PROP_CHARGE_COUNTER: ret = olpc_ec_cmd(EC_BAT_ACR, NULL, 0, (void *)&ec_word, 2); if (ret) return ret; - val->intval = (s16)be16_to_cpu(ec_word) * 6250 / 15; + val->intval = ecword_to_cpu(data, ec_word) * 6250 / 15; break; case POWER_SUPPLY_PROP_SERIAL_NUMBER: ret = olpc_ec_cmd(EC_BAT_SERIAL, NULL, 0, (void *)&ser_buf, 8); @@ -620,7 +629,11 @@ static int olpc_battery_probe(struct platform_device *pdev) if (ret) return ret; - if (ecver > 0x44) { + if (of_find_compatible_node(NULL, NULL, "olpc,xo1.75-ec")) { + /* XO 1.75 */ + data->new_proto = 1; + data->little_endian = 1; + } else if (ecver > 0x44) { /* XO 1 or 1.5 with a new EC firmware. */ data->new_proto = 1; } else if (ecver < 0x44) {