From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754494AbaKPH7e (ORCPT ); Sun, 16 Nov 2014 02:59:34 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:49259 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751656AbaKPH7c (ORCPT ); Sun, 16 Nov 2014 02:59:32 -0500 Date: Sun, 16 Nov 2014 08:59:28 +0100 From: Pavel Machek To: pali.rohar@gmail.com, sre@debian.org, sre@ring0.de, kernel list , linux-arm-kernel , linux-omap@vger.kernel.org, tony@atomide.com, khilman@kernel.org, aaro.koskinen@iki.fi, freemangordon@abv.bg, bcousson@baylibre.com, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, sakari.ailus@iki.fi, devicetree@vger.kernel.org, linux-media@vger.kernel.org Subject: [RFC] adp1653: Add device tree bindings for LED controller Message-ID: <20141116075928.GA9763@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For device tree people: Yes, I know I'll have to create file in documentation, but does the binding below look acceptable? I'll clean up driver code a bit more, remove the printks. Anything else obviously wrong? Signed-off-by: Pavel Machek Thanks, Pavel diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts index 739fcf2..ed0bfc1 100644 --- a/arch/arm/boot/dts/omap3-n900.dts +++ b/arch/arm/boot/dts/omap3-n900.dts @@ -553,6 +561,18 @@ ti,usb-charger-detection = <&isp1704>; }; + + adp1653: adp1653@30 { + compatible = "ad,adp1653"; + reg = <0x30>; + + max-flash-timeout-usec = <500000>; + max-flash-intensity-uA = <320000>; + max-torch-intensity-uA = <50000>; + max-indicator-intensity-uA = <17500>; + + gpios = <&gpio3 24 GPIO_ACTIVE_HIGH>; /* Want 88 */ + }; }; &i2c3 { diff --git a/drivers/media/i2c/adp1653.c b/drivers/media/i2c/adp1653.c index 873fe19..e21ed02 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 @@ -34,9 +35,12 @@ #include #include #include +#include #include #include +#include + #define TIMEOUT_MAX 820000 #define TIMEOUT_STEP 54600 #define TIMEOUT_MIN (TIMEOUT_MAX - ADP1653_REG_CONFIG_TMR_SET_MAX \ @@ -308,7 +316,16 @@ __adp1653_set_power(struct adp1653_flash *flash, int on) { int ret; - ret = flash->platform_data->power(&flash->subdev, on); + if (flash->platform_data->power) + ret = flash->platform_data->power(&flash->subdev, on); + else { + gpio_set_value(flash->platform_data->power_gpio, on); + if (on) { + /* Some delay is apparently required. */ + udelay(20); + } + } + if (ret < 0) return ret; @@ -316,8 +333,13 @@ __adp1653_set_power(struct adp1653_flash *flash, int 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 + gpio_set_value(flash->platform_data->power_gpio, 0); return ret; } @@ -407,21 +429,87 @@ 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) +{ + u32 val; + struct adp1653_platform_data *pd; + enum of_gpio_flags flags; + int gpio; + + if (!node) + return -EINVAL; + + printk("adp1653: no platform data\n"); + pd = devm_kzalloc(&client->dev, sizeof(*pd), GFP_KERNEL); + if (!pd) + return -ENOMEM; + flash->platform_data = pd; + + + + + + + + if (of_property_read_u32(node, "max-flash-timeout-usec", &val)) return -EINVAL; + pd->max_flash_timeout = val; + if (of_property_read_u32(node, "max-flash-intensity-uA", &val)) return -EINVAL; + pd->max_flash_intensity = val/1000; + if (of_property_read_u32(node, "max-torch-intensity-uA", &val)) return -EINVAL; + pd->max_torch_intensity = val/1000; + if (of_property_read_u32(node, "max-indicator-intensity-uA", &val)) return -EINVAL; + pd->max_indicator_intensity = val; + + if (!of_find_property(node, "gpios", NULL)) { + printk("No gpio node\n"); + return -EINVAL; + } + + gpio = of_get_gpio_flags(node, 0, &flags); + if (gpio < 0) { + printk("Error getting GPIO\n"); + return -EINVAL; + } + + pd->power_gpio = gpio; + + return 0; +} + + 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; + printk("adp1653: probe\n"); flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); if (flash == NULL) return -ENOMEM; - flash->platform_data = client->dev.platform_data; + /* we couldn't work without platform data */ + if (client->dev.platform_data == NULL) { + ret = adp1653_of_init(client, flash, client->dev.of_node); + if (ret) + return ret; + } else + flash->platform_data = client->dev.platform_data; mutex_init(&flash->power_lock); @@ -439,9 +527,15 @@ static int adp1653_probe(struct i2c_client *client, flash->subdev.entity.type = MEDIA_ENT_T_V4L2_SUBDEV_FLASH; + __adp1653_set_power(flash, 1); + + __adp1653_set_power(flash, 0); + printk("Flash should have blinked\n"); + return 0; free_and_quit: + printk("adp1653: something failed registering\n"); v4l2_ctrl_handler_free(&flash->ctrls); return ret; } diff --git a/include/media/adp1653.h b/include/media/adp1653.h index 1d9b48a..b556580 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 */ + + int power_gpio; /* for device-tree based boot */ }; #define to_adp1653_flash(sd) container_of(sd, struct adp1653_flash, subdev) -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html