From patchwork Mon Feb 3 09:17:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Guido_G=C3=BCnther?= X-Patchwork-Id: 11362263 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 060491746 for ; Mon, 3 Feb 2020 09:17:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D7CB82070A for ; Mon, 3 Feb 2020 09:17:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727830AbgBCJRI (ORCPT ); Mon, 3 Feb 2020 04:17:08 -0500 Received: from honk.sigxcpu.org ([24.134.29.49]:46324 "EHLO honk.sigxcpu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726244AbgBCJRI (ORCPT ); Mon, 3 Feb 2020 04:17:08 -0500 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id E0886FB05; Mon, 3 Feb 2020 10:17:04 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Uw_zNkNSlMdK; Mon, 3 Feb 2020 10:17:03 +0100 (CET) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id DAC00400E4; Mon, 3 Feb 2020 10:17:02 +0100 (CET) From: =?utf-8?q?Guido_G=C3=BCnther?= To: Tomas Novotny , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , "Angus Ainslie (Purism)" , =?utf-8?q?Guido_G=C3=BCnther?= , Marco Felsch , Thomas Gleixner , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/2] iio: vcnl4000: Use a single return when getting IIO_CHAN_INFO_RAW Date: Mon, 3 Feb 2020 10:17:01 +0100 Message-Id: <86e272aaf6726d6d5171445e7f2df6cdbb74057f.1580721204.git.agx@sigxcpu.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This will be useful when introducing runtime pm. Signed-off-by: Guido Günther --- drivers/iio/light/vcnl4000.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index b0e241aaefb4..8f198383626b 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -335,17 +335,18 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev, switch (chan->type) { case IIO_LIGHT: ret = data->chip_spec->measure_light(data, val); - if (ret < 0) - return ret; - return IIO_VAL_INT; + if (!ret) + ret = IIO_VAL_INT; + break; case IIO_PROXIMITY: ret = data->chip_spec->measure_proximity(data, val); - if (ret < 0) - return ret; - return IIO_VAL_INT; + if (!ret) + ret = IIO_VAL_INT; + break; default: - return -EINVAL; + ret = -EINVAL; } + return ret; case IIO_CHAN_INFO_SCALE: if (chan->type != IIO_LIGHT) return -EINVAL; From patchwork Mon Feb 3 09:17:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Guido_G=C3=BCnther?= X-Patchwork-Id: 11362267 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4FBE9138D for ; Mon, 3 Feb 2020 09:17:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E5A42080D for ; Mon, 3 Feb 2020 09:17:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727926AbgBCJRK (ORCPT ); Mon, 3 Feb 2020 04:17:10 -0500 Received: from honk.sigxcpu.org ([24.134.29.49]:46346 "EHLO honk.sigxcpu.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727836AbgBCJRJ (ORCPT ); Mon, 3 Feb 2020 04:17:09 -0500 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id 6EEE5FB02; Mon, 3 Feb 2020 10:17:06 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JMWt_TKgTVIz; Mon, 3 Feb 2020 10:17:03 +0100 (CET) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id E6A4D400E8; Mon, 3 Feb 2020 10:17:02 +0100 (CET) From: =?utf-8?q?Guido_G=C3=BCnther?= To: Tomas Novotny , Jonathan Cameron , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , "Angus Ainslie (Purism)" , =?utf-8?q?Guido_G=C3=BCnther?= , Marco Felsch , Thomas Gleixner , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/2] iio: vncl4000: Enable runtime pm for vcnl4200/4040 Date: Mon, 3 Feb 2020 10:17:02 +0100 Message-Id: <60fa4c2a739448778ae56fe3f2fdb10302055c59.1580721204.git.agx@sigxcpu.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This is modelled after the vcnl4035 driver. For the vcnl40{0,1,2}0 we don't do anything since they use on demand measurement. Signed-off-by: Guido Günther --- drivers/iio/light/vcnl4000.c | 129 +++++++++++++++++++++++++++++++---- 1 file changed, 117 insertions(+), 12 deletions(-) diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c index 8f198383626b..3b71c7d538af 100644 --- a/drivers/iio/light/vcnl4000.c +++ b/drivers/iio/light/vcnl4000.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -57,6 +58,8 @@ #define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */ #define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */ +#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */ + enum vcnl4000_device_ids { VCNL4000, VCNL4010, @@ -87,6 +90,7 @@ struct vcnl4000_chip_spec { int (*init)(struct vcnl4000_data *data); int (*measure_light)(struct vcnl4000_data *data, int *val); int (*measure_proximity)(struct vcnl4000_data *data, int *val); + int (*set_power_state)(struct vcnl4000_data *data, bool on); }; static const struct i2c_device_id vcnl4000_id[] = { @@ -99,6 +103,12 @@ static const struct i2c_device_id vcnl4000_id[] = { }; MODULE_DEVICE_TABLE(i2c, vcnl4000_id); +static int vcnl4000_set_power_state(struct vcnl4000_data *data, bool on) +{ + /* no suspend op */ + return 0; +} + static int vcnl4000_init(struct vcnl4000_data *data) { int ret, prod_id; @@ -127,9 +137,31 @@ static int vcnl4000_init(struct vcnl4000_data *data) data->al_scale = 250000; mutex_init(&data->vcnl4000_lock); - return 0; + return data->chip_spec->set_power_state(data, true); }; +static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on) +{ + u16 val = on ? 0 /* power on */ : 1 /* shut down */; + int ret; + + ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val); + if (ret < 0) + return ret; + + return i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val); + if (ret < 0) + return ret; + + if (on) { + /* Wait at least one integration cycle before fetching data */ + data->vcnl4200_al.last_measurement = ktime_get(); + data->vcnl4200_ps.last_measurement = ktime_get(); + } + + return 0; +} + static int vcnl4200_init(struct vcnl4000_data *data) { int ret, id; @@ -155,14 +187,6 @@ static int vcnl4200_init(struct vcnl4000_data *data) data->rev = (ret >> 8) & 0xf; - /* Set defaults and enable both channels */ - ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, 0); - if (ret < 0) - return ret; - ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, 0); - if (ret < 0) - return ret; - data->vcnl4200_al.reg = VCNL4200_AL_DATA; data->vcnl4200_ps.reg = VCNL4200_PS_DATA; switch (id) { @@ -180,11 +204,13 @@ static int vcnl4200_init(struct vcnl4000_data *data) data->al_scale = 120000; break; } - data->vcnl4200_al.last_measurement = ktime_set(0, 0); - data->vcnl4200_ps.last_measurement = ktime_set(0, 0); mutex_init(&data->vcnl4200_al.lock); mutex_init(&data->vcnl4200_ps.lock); + ret = data->chip_spec->set_power_state(data, true); + if (ret < 0) + return ret; + return 0; }; @@ -291,24 +317,28 @@ static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = { .init = vcnl4000_init, .measure_light = vcnl4000_measure_light, .measure_proximity = vcnl4000_measure_proximity, + .set_power_state = vcnl4000_set_power_state, }, [VCNL4010] = { .prod = "VCNL4010/4020", .init = vcnl4000_init, .measure_light = vcnl4000_measure_light, .measure_proximity = vcnl4000_measure_proximity, + .set_power_state = vcnl4000_set_power_state, }, [VCNL4040] = { .prod = "VCNL4040", .init = vcnl4200_init, .measure_light = vcnl4200_measure_light, .measure_proximity = vcnl4200_measure_proximity, + .set_power_state = vcnl4200_set_power_state, }, [VCNL4200] = { .prod = "VCNL4200", .init = vcnl4200_init, .measure_light = vcnl4200_measure_light, .measure_proximity = vcnl4200_measure_proximity, + .set_power_state = vcnl4200_set_power_state, }, }; @@ -323,6 +353,23 @@ static const struct iio_chan_spec vcnl4000_channels[] = { } }; +static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on) +{ + struct device *dev = &data->client->dev; + int ret; + + if (on) { + ret = pm_runtime_get_sync(dev); + if (ret < 0) + pm_runtime_put_noidle(dev); + } else { + pm_runtime_mark_last_busy(dev); + ret = pm_runtime_put_autosuspend(dev); + } + + return ret; +} + static int vcnl4000_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -332,6 +379,10 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev, switch (mask) { case IIO_CHAN_INFO_RAW: + ret = vcnl4000_set_pm_runtime_state(data, true); + if (ret < 0) + return ret; + switch (chan->type) { case IIO_LIGHT: ret = data->chip_spec->measure_light(data, val); @@ -346,6 +397,7 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev, default: ret = -EINVAL; } + vcnl4000_set_pm_runtime_state(data, false); return ret; case IIO_CHAN_INFO_SCALE: if (chan->type != IIO_LIGHT) @@ -394,7 +446,22 @@ static int vcnl4000_probe(struct i2c_client *client, indio_dev->name = VCNL4000_DRV_NAME; indio_dev->modes = INDIO_DIRECT_MODE; - return devm_iio_device_register(&client->dev, indio_dev); + ret = pm_runtime_set_active(&client->dev); + if (ret < 0) + goto fail_poweroff; + + ret = iio_device_register(indio_dev); + if (ret < 0) + goto fail_poweroff; + + pm_runtime_enable(&client->dev); + pm_runtime_set_autosuspend_delay(&client->dev, VCNL4000_SLEEP_DELAY_MS); + pm_runtime_use_autosuspend(&client->dev); + + return 0; +fail_poweroff: + data->chip_spec->set_power_state(data, false); + return ret; } static const struct of_device_id vcnl_4000_of_match[] = { @@ -422,13 +489,51 @@ static const struct of_device_id vcnl_4000_of_match[] = { }; MODULE_DEVICE_TABLE(of, vcnl_4000_of_match); +static int vcnl4000_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct vcnl4000_data *data = iio_priv(indio_dev); + + pm_runtime_dont_use_autosuspend(&client->dev); + pm_runtime_disable(&client->dev); + iio_device_unregister(indio_dev); + pm_runtime_set_suspended(&client->dev); + + return data->chip_spec->set_power_state(data, false); +} + +static int __maybe_unused vcnl4000_runtime_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct vcnl4000_data *data = iio_priv(indio_dev); + + return data->chip_spec->set_power_state(data, false); +} + +static int __maybe_unused vcnl4000_runtime_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct vcnl4000_data *data = iio_priv(indio_dev); + + return data->chip_spec->set_power_state(data, true); +} + +static const struct dev_pm_ops vcnl4000_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) + SET_RUNTIME_PM_OPS(vcnl4000_runtime_suspend, + vcnl4000_runtime_resume, NULL) +}; + static struct i2c_driver vcnl4000_driver = { .driver = { .name = VCNL4000_DRV_NAME, + .pm = &vcnl4000_pm_ops, .of_match_table = vcnl_4000_of_match, }, .probe = vcnl4000_probe, .id_table = vcnl4000_id, + .remove = vcnl4000_remove, }; module_i2c_driver(vcnl4000_driver);