From patchwork Wed Apr 15 23:37:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 6223321 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 3A1D2BF4A6 for ; Wed, 15 Apr 2015 23:38:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2306C202FF for ; Wed, 15 Apr 2015 23:38:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF286202E9 for ; Wed, 15 Apr 2015 23:38:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753429AbbDOXiH (ORCPT ); Wed, 15 Apr 2015 19:38:07 -0400 Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:58820 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752154AbbDOXiF (ORCPT ); Wed, 15 Apr 2015 19:38:05 -0400 Received: from lanttu.localdomain (lanttu.localdomain [192.168.5.64]) by hillosipuli.retiisi.org.uk (Postfix) with ESMTP id 7053A60097; Thu, 16 Apr 2015 02:38:01 +0300 (EEST) From: Sakari Ailus To: pavel@ucw.cz, linux-leds@vger.kernel.org Cc: linux-media@vger.kernel.org, devicetree@vger.kernel.org, sre@ring0.de Subject: [PATCH v8 1/1] media: i2c/adp1653: Devicetree support for adp1653 Date: Thu, 16 Apr 2015 02:37:13 +0300 Message-Id: <1429141034-29237-1-git-send-email-sakari.ailus@iki.fi> X-Mailer: git-send-email 1.7.10.4 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pavel Machek Add device tree support for adp1653 flash LED driver. Signed-off-by: Pavel Machek Signed-off-by: Sakari Ailus --- Hi folks, Here's an updated adp1653 DT patch, with changes since v7: - Include of.h and gpio/consumer.h instead of of_gpio.h and gpio.h. - Don't initialise ret as zero in __adp1653_set_power(), check ret only when it's been set. - Don't check for node non-NULL in adp1653_of_init(). It never is NULL. - Remove temporary variable val in adp1653_of_init(). - If the device has no of_node, check that platform data is non-NULL; otherwise return an error. - Assign flash->platform_data only if dev->of_node is NULL. drivers/media/i2c/adp1653.c | 100 ++++++++++++++++++++++++++++++++++++++----- include/media/adp1653.h | 8 ++-- 2 files changed, 95 insertions(+), 13 deletions(-) diff --git a/drivers/media/i2c/adp1653.c b/drivers/media/i2c/adp1653.c index 873fe19..c70abab 100644 --- a/drivers/media/i2c/adp1653.c +++ b/drivers/media/i2c/adp1653.c @@ -8,6 +8,7 @@ * Contributors: * Sakari Ailus * Tuukka Toivonen + * Pavel Machek * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -34,6 +35,8 @@ #include #include #include +#include +#include #include #include @@ -308,16 +311,28 @@ __adp1653_set_power(struct adp1653_flash *flash, int on) { int ret; - ret = flash->platform_data->power(&flash->subdev, on); - if (ret < 0) - return ret; + if (flash->platform_data->power) { + ret = flash->platform_data->power(&flash->subdev, on); + if (ret < 0) + return ret; + } else { + gpiod_set_value(flash->platform_data->enable_gpio, on); + if (on) + /* Some delay is apparently required. */ + udelay(20); + } if (!on) return 0; ret = adp1653_init_device(flash); - if (ret < 0) + if (ret >= 0) + return ret; + + if (flash->platform_data->power) flash->platform_data->power(&flash->subdev, 0); + else + gpiod_set_value(flash->platform_data->enable_gpio, 0); return ret; } @@ -407,21 +422,85 @@ static int adp1653_resume(struct device *dev) #endif /* CONFIG_PM */ +static int adp1653_of_init(struct i2c_client *client, + struct adp1653_flash *flash, + struct device_node *node) +{ + struct adp1653_platform_data *pd; + struct device_node *child; + + pd = devm_kzalloc(&client->dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + flash->platform_data = pd; + + child = of_get_child_by_name(node, "flash"); + if (!child) + return -EINVAL; + + if (of_property_read_u32(child, "flash-timeout-us", + &pd->max_flash_timeout)) + goto err; + + if (of_property_read_u32(child, "flash-max-microamp", + &pd->max_flash_intensity)) + goto err; + + pd->max_flash_intensity /= 1000; + + if (of_property_read_u32(child, "led-max-microamp", + &pd->max_torch_intensity)) + goto err; + + pd->max_torch_intensity /= 1000; + of_node_put(child); + + child = of_get_child_by_name(node, "indicator"); + if (!child) + return -EINVAL; + + if (of_property_read_u32(child, "led-max-microamp", + &pd->max_indicator_intensity)) + goto err; + + of_node_put(child); + + pd->enable_gpio = devm_gpiod_get(&client->dev, "enable"); + if (!pd->enable_gpio) { + dev_err(&client->dev, "Error getting GPIO\n"); + return -EINVAL; + } + + return 0; +err: + dev_err(&client->dev, "Required property not found\n"); + of_node_put(child); + return -EINVAL; +} + + static int adp1653_probe(struct i2c_client *client, const struct i2c_device_id *devid) { struct adp1653_flash *flash; int ret; - /* we couldn't work without platform data */ - if (client->dev.platform_data == NULL) - return -ENODEV; - flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); if (flash == NULL) return -ENOMEM; - flash->platform_data = client->dev.platform_data; + if (client->dev.of_node) { + ret = adp1653_of_init(client, flash, client->dev.of_node); + if (ret) + return ret; + } else { + if (!client->dev.platform_data) { + dev_err(&client->dev, + "Neither DT not platform data provided\n"); + return EINVAL; + } + flash->platform_data = client->dev.platform_data; + } mutex_init(&flash->power_lock); @@ -442,6 +521,7 @@ static int adp1653_probe(struct i2c_client *client, return 0; free_and_quit: + dev_err(&client->dev, "adp1653: failed to register device\n"); v4l2_ctrl_handler_free(&flash->ctrls); return ret; } @@ -464,7 +544,7 @@ static const struct i2c_device_id adp1653_id_table[] = { }; MODULE_DEVICE_TABLE(i2c, adp1653_id_table); -static struct dev_pm_ops adp1653_pm_ops = { +static const struct dev_pm_ops adp1653_pm_ops = { .suspend = adp1653_suspend, .resume = adp1653_resume, }; diff --git a/include/media/adp1653.h b/include/media/adp1653.h index 1d9b48a..9779c85 100644 --- a/include/media/adp1653.h +++ b/include/media/adp1653.h @@ -100,9 +100,11 @@ struct adp1653_platform_data { int (*power)(struct v4l2_subdev *sd, int on); u32 max_flash_timeout; /* flash light timeout in us */ - u32 max_flash_intensity; /* led intensity, flash mode */ - u32 max_torch_intensity; /* led intensity, torch mode */ - u32 max_indicator_intensity; /* indicator led intensity */ + u32 max_flash_intensity; /* led intensity, flash mode, mA */ + u32 max_torch_intensity; /* led intensity, torch mode, mA */ + u32 max_indicator_intensity; /* indicator led intensity, uA */ + + struct gpio_desc *enable_gpio; /* for device-tree based boot */ }; #define to_adp1653_flash(sd) container_of(sd, struct adp1653_flash, subdev)