From patchwork Tue Jan 11 02:32:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 12709436 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52288C433F5 for ; Tue, 11 Jan 2022 02:32:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344749AbiAKCcm (ORCPT ); Mon, 10 Jan 2022 21:32:42 -0500 Received: from rere.qmqm.pl ([91.227.64.183]:27021 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244191AbiAKCcm (ORCPT ); Mon, 10 Jan 2022 21:32:42 -0500 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4JXvqY0rrNzMc; Tue, 11 Jan 2022 03:32:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1641868361; bh=WKN/FQV7IT3C9XOGXTWW2li26hron8KQagK41I7nUPg=; h=Date:From:Subject:To:Cc:From; b=JJdeSVBf1alHhHu5M5Yhqr2RFA4nfNOeLRNCmTPh1laPUaTmjG8nJ5tztpqDfJaWc ELVkPV+ST41a6Vrxkwab6hWAe/qTDhbBswlMatk1BOFz5AlF0CBzrOr+ichjCzHzFd V2zqI8uH6gSxSFWkZW3Jsdj6p6Gw1OFBWcI6CQ9gSEBEQVPnZ52sRnwrivE3V3W/OK vCAKkUnTNYe2SMudYYuVYboPYKfSy4KxuIg0/WVQPdtTaVhpFdH/M3WLwotR48xzSn zjCSdAyksafFG+BjGf5BYa1ZQ/cahQoca4Rrfhk541DS3Bx9gQoeo589syBbjDLtUz e8IxAnOTAKq4g== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.4 at mail Date: Tue, 11 Jan 2022 03:32:40 +0100 Message-Id: <680a4c737950f59e787f64887402e3ae247e89dd.1641868274.git.mirq-linux@rere.qmqm.pl> From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH 1/2] power: supply: ltc2941: simplify Qlsb calculation MIME-Version: 1.0 To: Sebastian Reichel Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Replace two divisions with a subtraction+shift for a small code size improvement and less brackets. Signed-off-by: Michał Mirosław --- drivers/power/supply/ltc2941-battery-gauge.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/power/supply/ltc2941-battery-gauge.c b/drivers/power/supply/ltc2941-battery-gauge.c index 09f3e78af4e0..c0cbf4cd59ee 100644 --- a/drivers/power/supply/ltc2941-battery-gauge.c +++ b/drivers/power/supply/ltc2941-battery-gauge.c @@ -490,13 +490,13 @@ static int ltc294x_i2c_probe(struct i2c_client *client, if (info->id == LTC2943_ID) { if (prescaler_exp > LTC2943_MAX_PRESCALER_EXP) prescaler_exp = LTC2943_MAX_PRESCALER_EXP; - info->Qlsb = ((340 * 50000) / r_sense) / - (4096 / (1 << (2*prescaler_exp))); + info->Qlsb = ((340 * 50000) / r_sense) >> + (12 - 2*prescaler_exp); } else { if (prescaler_exp > LTC2941_MAX_PRESCALER_EXP) prescaler_exp = LTC2941_MAX_PRESCALER_EXP; - info->Qlsb = ((85 * 50000) / r_sense) / - (128 / (1 << prescaler_exp)); + info->Qlsb = ((85 * 50000) / r_sense) >> + (7 - prescaler_exp); } /* Read status register to check for LTC2942 */ From patchwork Tue Jan 11 02:32:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 12709437 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16A17C433EF for ; Tue, 11 Jan 2022 02:32:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344774AbiAKCcn (ORCPT ); Mon, 10 Jan 2022 21:32:43 -0500 Received: from rere.qmqm.pl ([91.227.64.183]:47893 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244421AbiAKCcm (ORCPT ); Mon, 10 Jan 2022 21:32:42 -0500 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 4JXvqY3HxkzTV; Tue, 11 Jan 2022 03:32:41 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1641868361; bh=twqKe1Mt8wJKNPpnOSYM2dsOVPjXF14PzRKIHZBWe/s=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=eY566POCWZz4ADTUgHMhYgpNNUKzEnjzd5dKrpTBRR0QMa57I+0zA4p5K/Id7aCjS iLbuxHJoPdnZZAMb1rUdLMkW+0uZPHlz2ssxqGNTRVeoqHlvhgSq20RZ4vVsDJ6cUg Ja7fdLlLl0PEAp9hfsYs0tYR/4ClAH8zFxk8AMvo19VsJkKXdCoSIiIxYhkb3QX0X6 8O3PnpE2626k0Dr9FwFsFp10bWNodrvdYrWtOWVmijusJbIB5Ihd7crxiOGmJpJ47g vxkztzqdnoUkfBPodERcTzR5tdojP+erOB/KS+quudM9yWdlCfZV0zHl5OpCECeMrc SdeWeXhNX/IYA== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.4 at mail Date: Tue, 11 Jan 2022 03:32:41 +0100 Message-Id: <3eede91c6484c6626f2a727bf1837ee93939155a.1641868274.git.mirq-linux@rere.qmqm.pl> In-Reply-To: <680a4c737950f59e787f64887402e3ae247e89dd.1641868274.git.mirq-linux@rere.qmqm.pl> References: <680a4c737950f59e787f64887402e3ae247e89dd.1641868274.git.mirq-linux@rere.qmqm.pl> From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH 2/2] power: supply: ltc2941: clean up error messages MIME-Version: 1.0 To: Sebastian Reichel Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Replace dev_err() with dev_err_probe() in probe() and extend register access failure messages. dev_err()s in _reset() are removed as they are redundant: register access wrappers already log the error. Signed-off-by: Michał Mirosław --- drivers/power/supply/ltc2941-battery-gauge.c | 53 ++++++++------------ 1 file changed, 20 insertions(+), 33 deletions(-) diff --git a/drivers/power/supply/ltc2941-battery-gauge.c b/drivers/power/supply/ltc2941-battery-gauge.c index c0cbf4cd59ee..657305214d68 100644 --- a/drivers/power/supply/ltc2941-battery-gauge.c +++ b/drivers/power/supply/ltc2941-battery-gauge.c @@ -112,7 +112,8 @@ static int ltc294x_read_regs(struct i2c_client *client, ret = i2c_transfer(client->adapter, &msgs[0], 2); if (ret < 0) { - dev_err(&client->dev, "ltc2941 read_reg failed!\n"); + dev_err(&client->dev, "ltc2941 read_reg(0x%x[%d]) failed: %pe\n", + reg, num_regs, ERR_PTR(ret)); return ret; } @@ -130,7 +131,8 @@ static int ltc294x_write_regs(struct i2c_client *client, ret = i2c_smbus_write_i2c_block_data(client, reg_start, num_regs, buf); if (ret < 0) { - dev_err(&client->dev, "ltc2941 write_reg failed!\n"); + dev_err(&client->dev, "ltc2941 write_reg(0x%x[%d]) failed: %pe\n", + reg, num_regs, ERR_PTR(ret)); return ret; } @@ -148,11 +150,8 @@ static int ltc294x_reset(const struct ltc294x_info *info, int prescaler_exp) /* Read status and control registers */ ret = ltc294x_read_regs(info->client, LTC294X_REG_CONTROL, &value, 1); - if (ret < 0) { - dev_err(&info->client->dev, - "Could not read registers from device\n"); - goto error_exit; - } + if (ret < 0) + return ret; control = LTC294X_REG_CONTROL_PRESCALER_SET(prescaler_exp) | LTC294X_REG_CONTROL_ALCC_CONFIG_DISABLED; @@ -172,17 +171,11 @@ static int ltc294x_reset(const struct ltc294x_info *info, int prescaler_exp) if (value != control) { ret = ltc294x_write_regs(info->client, LTC294X_REG_CONTROL, &control, 1); - if (ret < 0) { - dev_err(&info->client->dev, - "Could not write register\n"); - goto error_exit; - } + if (ret < 0) + return ret; } return 0; - -error_exit: - return ret; } static int ltc294x_read_charge_register(const struct ltc294x_info *info, @@ -472,11 +465,9 @@ static int ltc294x_i2c_probe(struct i2c_client *client, /* r_sense can be negative, when sense+ is connected to the battery * instead of the sense-. This results in reversed measurements. */ ret = of_property_read_u32(np, "lltc,resistor-sense", &r_sense); - if (ret < 0) { - dev_err(&client->dev, + if (ret < 0) + return dev_err_probe(&client->dev, ret, "Could not find lltc,resistor-sense in devicetree\n"); - return ret; - } info->r_sense = r_sense; ret = of_property_read_u32(np, "lltc,prescaler-exponent", @@ -502,11 +493,9 @@ static int ltc294x_i2c_probe(struct i2c_client *client, /* Read status register to check for LTC2942 */ if (info->id == LTC2941_ID || info->id == LTC2942_ID) { ret = ltc294x_read_regs(client, LTC294X_REG_STATUS, &status, 1); - if (ret < 0) { - dev_err(&client->dev, + if (ret < 0) + return dev_err_probe(&client->dev, ret, "Could not read status register\n"); - return ret; - } if (status & LTC2941_REG_STATUS_CHIP_ID) info->id = LTC2941_ID; else @@ -545,19 +534,17 @@ static int ltc294x_i2c_probe(struct i2c_client *client, return ret; ret = ltc294x_reset(info, prescaler_exp); - if (ret < 0) { - dev_err(&client->dev, "Communication with chip failed\n"); - return ret; - } + if (ret < 0) + return dev_err_probe(&client->dev, ret, + "Communication with chip failed\n"); info->supply = devm_power_supply_register(&client->dev, &info->supply_desc, &psy_cfg); - if (IS_ERR(info->supply)) { - dev_err(&client->dev, "failed to register ltc2941\n"); - return PTR_ERR(info->supply); - } else { - schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ); - } + if (IS_ERR(info->supply)) + return dev_err_probe(&client->dev, PTR_ERR(info->supply), + "failed to register ltc2941\n"); + + schedule_delayed_work(&info->work, LTC294X_WORK_DELAY * HZ); return 0; }