From patchwork Tue Mar 31 13:57:44 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jacek Anaszewski X-Patchwork-Id: 6130421 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 38D639F1BE for ; Tue, 31 Mar 2015 13:59:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 186052015E for ; Tue, 31 Mar 2015 13:59:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C6A59200DF for ; Tue, 31 Mar 2015 13:59:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755024AbbCaN7n (ORCPT ); Tue, 31 Mar 2015 09:59:43 -0400 Received: from mailout4.samsung.com ([203.254.224.34]:55256 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753888AbbCaN7m (ORCPT ); Tue, 31 Mar 2015 09:59:42 -0400 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout4.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NM200E70XHBMW00@mailout4.samsung.com>; Tue, 31 Mar 2015 22:58:23 +0900 (KST) X-AuditID: cbfee61b-f79d76d0000024d6-2b-551aa7ff4b59 Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 36.6F.09430.FF7AA155; Tue, 31 Mar 2015 22:58:23 +0900 (KST) Received: from AMDC2362.DIGITAL.local ([106.120.53.23]) by mmp2.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTPA id <0NM20079DXGBD140@mmp2.samsung.com>; Tue, 31 Mar 2015 22:58:23 +0900 (KST) From: Jacek Anaszewski To: linux-leds@vger.kernel.org, linux-media@vger.kernel.org Cc: kyungmin.park@samsung.com, pavel@ucw.cz, cooloney@gmail.com, rpurdie@rpsys.net, sakari.ailus@iki.fi, s.nawrocki@samsung.com, Jacek Anaszewski Subject: [PATCH v4 11/12] leds: aat1290: add support for V4L2 Flash sub-device Date: Tue, 31 Mar 2015 15:57:44 +0200 Message-id: <1427810265-25651-2-git-send-email-j.anaszewski@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-reply-to: <1427810265-25651-1-git-send-email-j.anaszewski@samsung.com> References: <1427810265-25651-1-git-send-email-j.anaszewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrMLMWRmVeSWpSXmKPExsVy+t9jQd3/y6VCDX7+kbE4unMik0Xv1eeM Fmeb3rBbbH2zjtGiZ8NWVou7p46yWeze9ZTV4vCbdlaLM/tXsjlweuycdZfd4/DXhSwee+b/ YPXo27KK0WPF6u/sHp83yQWwRXHZpKTmZJalFunbJXBl7Ok4zlxw16Hi6/9LLA2MV0y7GDk5 JARMJC58vM4EYYtJXLi3nq2LkYtDSGA6o0TXz5fMEM5PRok/25eBVbEJGEr8fPEazBYRsJaY dWg6C0gRs8AGRonLExpZQBLCAn4SF550gxWxCKhKXD62mBHE5hXwkFh+5gZQnANonYLEnEk2 IGFOAU+JP0uOMIPYQkAlN65uYZrAyLuAkWEVo2hqQXJBcVJ6rpFecWJucWleul5yfu4mRnDQ PZPewbiqweIQowAHoxIPb8UdyVAh1sSy4srcQ4wSHMxKIrw/J0qFCvGmJFZWpRblxxeV5qQW H2KU5mBREudVsm8LERJITyxJzU5NLUgtgskycXBKNTBOLXRye9JptsJsTd+nDqvp+5dq653a If2x6f60HwWr2vpW/Iqy78gLsl38Tb2qSfXGov8Trod5XS6yULkkks/CKeW7+71NidBU23uu 9RuSZku5Xrx4c0XDjuiclnKzCa2f5oSc+lT1ZPM0KeZnrfM2bbT0nyZi6bvUqvOJlMX0FF/b MP8KGRslluKMREMt5qLiRACbNylaNgIAAA== 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 Add support for V4L2 Flash sub-device to the aat1290 LED Flash class driver. The support allows for V4L2 Flash sub-device to take the control of the LED Flash class device. Signed-off-by: Jacek Anaszewski Acked-by: Kyungmin Park Cc: Bryan Wu Cc: Richard Purdie Cc: Sakari Ailus --- drivers/leds/Kconfig | 1 + drivers/leds/leds-aat1290.c | 150 ++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 149 insertions(+), 2 deletions(-) diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index c3b5b027..d73f43f 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -47,6 +47,7 @@ config LEDS_AAT1290 depends on LEDS_CLASS_FLASH depends on GPIOLIB depends on OF + depends on PINCTRL help This option enables support for the LEDs on the AAT1290. diff --git a/drivers/leds/leds-aat1290.c b/drivers/leds/leds-aat1290.c index acfae35..34fd5c4 100644 --- a/drivers/leds/leds-aat1290.c +++ b/drivers/leds/leds-aat1290.c @@ -17,9 +17,11 @@ #include #include #include +#include #include #include #include +#include #define AAT1290_MOVIE_MODE_CURRENT_ADDR 17 #define AAT1290_MAX_MM_CURR_PERCENT_0 16 @@ -53,11 +55,17 @@ struct aat1290_led { /* corresponding LED Flash class device */ struct led_classdev_flash fled_cdev; + /* V4L2 Flash device */ + struct v4l2_flash *v4l2_flash; /* FLEN pin */ struct gpio_desc *gpio_fl_en; /* EN|SET pin */ struct gpio_desc *gpio_en_set; +#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) + /* movie mode current scale */ + int *mm_current_scale; +#endif /* maximum flash timeout */ u32 max_flash_tm; @@ -224,11 +232,16 @@ static int aat1290_led_flash_timeout_set(struct led_classdev_flash *fled_cdev, return 0; } -static int aat1290_led_parse_dt(struct aat1290_led *led) +static int aat1290_led_parse_dt(struct aat1290_led *led, + struct device_node **sub_node, + struct v4l2_flash_config *v4l2_sd_cfg) { struct led_classdev *led_cdev = &led->fled_cdev.led_cdev; struct device *dev = &led->pdev->dev; struct device_node *child_node; +#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) + struct pinctrl *pinctrl; +#endif int ret = 0; led->gpio_fl_en = devm_gpiod_get(dev, "flen"); @@ -245,6 +258,17 @@ static int aat1290_led_parse_dt(struct aat1290_led *led) return ret; } +#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) + pinctrl = devm_pinctrl_get_select_default(&led->pdev->dev); + if (IS_ERR(pinctrl)) { + v4l2_sd_cfg->has_external_strobe = false; + dev_info(dev, + "No support for external strobe detected.\n"); + } else { + v4l2_sd_cfg->has_external_strobe = true; + } +#endif + child_node = of_get_next_available_child(dev->of_node, NULL); if (!child_node) { dev_err(dev, "No DT child node found for connected LED.\n"); @@ -270,6 +294,8 @@ static int aat1290_led_parse_dt(struct aat1290_led *led) return ret; } + *sub_node = child_node; + return ret; } @@ -286,6 +312,100 @@ static void aat1290_init_flash_timeout(struct aat1290_led *led) setting->val = setting->max; } +#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) +enum led_brightness aat1290_intensity_to_brightness( + struct v4l2_flash *v4l2_flash, + s32 intensity) +{ + struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev; + struct aat1290_led *led = fled_cdev_to_led(fled_cdev); + int i; + + for (i = AAT1290_MM_CURRENT_SCALE_SIZE - 1; i >= 0; --i) + if (intensity >= led->mm_current_scale[i]) + return i + 1; + + return 1; +} + +s32 aat1290_brightness_to_intensity(struct v4l2_flash *v4l2_flash, + enum led_brightness brightness) +{ + struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev; + struct aat1290_led *led = fled_cdev_to_led(fled_cdev); + + return led->mm_current_scale[brightness - 1]; +} + +static int aat1290_led_external_strobe_set(struct v4l2_flash *v4l2_flash, + bool enable) +{ + struct aat1290_led *led = fled_cdev_to_led(v4l2_flash->fled_cdev); + struct led_classdev_flash *fled_cdev = v4l2_flash->fled_cdev; + struct led_classdev *led_cdev = &fled_cdev->led_cdev; + struct pinctrl *pinctrl; + + gpiod_direction_output(led->gpio_fl_en, 0); + gpiod_direction_output(led->gpio_en_set, 0); + + led->movie_mode = false; + led_cdev->brightness = 0; + + pinctrl = devm_pinctrl_get_select(&led->pdev->dev, + enable ? "isp" : "host"); + if (IS_ERR(pinctrl)) { + dev_warn(&led->pdev->dev, "Unable to switch strobe source.\n"); + return PTR_ERR(pinctrl); + } + + return 0; +} + +int init_mm_current_scale(struct aat1290_led *led) +{ + int max_mm_current_percent[] = { 20, 22, 25, 28, 32, 36, 40, 45, 50, 56, + 63, 71, 79, 89, 100 }; + int i, max_mm_current = AAT1290_MAX_MM_CURRENT(led->max_flash_current); + + led->mm_current_scale = devm_kzalloc(&led->pdev->dev, + sizeof(max_mm_current_percent), + GFP_KERNEL); + if (!led->mm_current_scale) + return -ENOMEM; + + for (i = 0; i < AAT1290_MM_CURRENT_SCALE_SIZE; ++i) + led->mm_current_scale[i] = max_mm_current * + max_mm_current_percent[i] / 100; + + return 0; +} + +static void aat1290_init_v4l2_flash_config(struct aat1290_led *led, + struct v4l2_flash_config *v4l2_sd_cfg) +{ + struct led_classdev *led_cdev = &led->fled_cdev.led_cdev; + struct led_flash_setting *s; + + strlcpy(v4l2_sd_cfg->dev_name, led_cdev->name, + sizeof(v4l2_sd_cfg->dev_name)); + + s = &v4l2_sd_cfg->intensity; + s->min = led->mm_current_scale[0]; + s->max = led->mm_current_scale[AAT1290_MM_CURRENT_SCALE_SIZE - 1]; + s->step = 1; + s->val = s->max; +} + +static const struct v4l2_flash_ops v4l2_flash_ops = { + .external_strobe_set = aat1290_led_external_strobe_set, + .intensity_to_led_brightness = aat1290_intensity_to_brightness, + .led_brightness_to_intensity = aat1290_brightness_to_intensity, +}; +#else +#define aat1290_init_v4l2_flash_config(led, v4l2_sd_cfg) +#define init_mm_current_scale(led) (0) +#endif + static const struct led_flash_ops flash_ops = { .strobe_set = aat1290_led_flash_strobe_set, .timeout_set = aat1290_led_flash_timeout_set, @@ -294,9 +414,11 @@ static const struct led_flash_ops flash_ops = { static int aat1290_led_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + struct device_node *sub_node = NULL; struct aat1290_led *led; struct led_classdev *led_cdev; struct led_classdev_flash *fled_cdev; + struct v4l2_flash_config v4l2_sd_cfg = {}; int ret; led = devm_kzalloc(dev, sizeof(*led), GFP_KERNEL); @@ -310,7 +432,15 @@ static int aat1290_led_probe(struct platform_device *pdev) fled_cdev->ops = &flash_ops; led_cdev = &fled_cdev->led_cdev; - ret = aat1290_led_parse_dt(led); + ret = aat1290_led_parse_dt(led, &sub_node, &v4l2_sd_cfg); + if (ret < 0) + return ret; + + /* + * Init non-linear movie mode current scale basing + * on the max flash current from Device Tree binding. + */ + ret = init_mm_current_scale(led); if (ret < 0) return ret; @@ -330,8 +460,23 @@ static int aat1290_led_probe(struct platform_device *pdev) if (ret < 0) goto err_flash_register; + aat1290_init_v4l2_flash_config(led, &v4l2_sd_cfg); + + led_cdev->dev->of_node = sub_node; + + /* Create V4L2 Flash subdev. */ + led->v4l2_flash = v4l2_flash_init(fled_cdev, + &v4l2_flash_ops, + &v4l2_sd_cfg); + if (IS_ERR(led->v4l2_flash)) { + ret = PTR_ERR(led->v4l2_flash); + goto error_v4l2_flash_init; + } + return 0; +error_v4l2_flash_init: + led_classdev_flash_unregister(fled_cdev); err_flash_register: mutex_destroy(&led->lock); @@ -342,6 +487,7 @@ static int aat1290_led_remove(struct platform_device *pdev) { struct aat1290_led *led = platform_get_drvdata(pdev); + v4l2_flash_release(led->v4l2_flash); led_classdev_flash_unregister(&led->fled_cdev); cancel_work_sync(&led->work_brightness_set);