From patchwork Wed Jun 24 06:50:54 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matt Ranostay X-Patchwork-Id: 6666001 Return-Path: X-Original-To: patchwork-linux-input@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 BBDACC05AC for ; Wed, 24 Jun 2015 06:50:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9D11420328 for ; Wed, 24 Jun 2015 06:50:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6271920618 for ; Wed, 24 Jun 2015 06:50:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751168AbbFXGt7 (ORCPT ); Wed, 24 Jun 2015 02:49:59 -0400 Received: from mail-pd0-f178.google.com ([209.85.192.178]:34060 "EHLO mail-pd0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750767AbbFXGtz (ORCPT ); Wed, 24 Jun 2015 02:49:55 -0400 Received: by pdbep18 with SMTP id ep18so2110777pdb.1; Tue, 23 Jun 2015 23:49:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=gQXtj5giZH4MUER3avWJYhS9AhnL8T4GA/+4ga9SEsU=; b=NctnaLyAJE6m6SNGr+dLtQOHX90WulrhjCOqiF178bvpXFmlCncImyES86L7tpLsd8 bRTwJpRrLK4jERamNj9DW3Jw3oxkd3te83rwL3iZxKwEBEAZJKo+7AfHjKogwO2hzL37 y1q44BUsvdPXMJIKxVoPAupaOgIBeyjlu/gqZkKHZpU3ZYtmatxzYgDylOguhOCIMqQd 9VgAnjLUFN9XKDoJjZy7cnsqUXEyYx82vVLBBWRKH9LfyhsyY8nN3tdnjlP2ebGLJZc6 MLmvssUkWfPFrs1l0GUYSbBCjFxODH3ecfJrV34QYaEp+Oxx4EPNyLOHMl3lj3VnbSOd j84A== X-Received: by 10.68.206.7 with SMTP id lk7mr76142956pbc.52.1435128595087; Tue, 23 Jun 2015 23:49:55 -0700 (PDT) Received: from localhost.localdomain (c-76-105-208-73.hsd1.or.comcast.net. [76.105.208.73]) by mx.google.com with ESMTPSA id go5sm25442453pbd.36.2015.06.23.23.49.54 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 23 Jun 2015 23:49:54 -0700 (PDT) From: Matt Ranostay To: zonque@gmail.com, dmitry.torokhov@gmail.com Cc: linux-input@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, Matt Ranostay Subject: [PATCH v6 2/2] cap11xx: add LED support Date: Tue, 23 Jun 2015 23:50:54 -0700 Message-Id: <1435128654-19454-3-git-send-email-mranostay@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1435128654-19454-1-git-send-email-mranostay@gmail.com> References: <1435128654-19454-1-git-send-email-mranostay@gmail.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-8.2 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham 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 Several cap11xx variants have LEDs that be can be controlled, this patchset implements this functionality. Signed-off-by: Matt Ranostay --- drivers/input/keyboard/cap11xx.c | 140 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 137 insertions(+), 3 deletions(-) diff --git a/drivers/input/keyboard/cap11xx.c b/drivers/input/keyboard/cap11xx.c index f07461a..b983b5a 100644 --- a/drivers/input/keyboard/cap11xx.c +++ b/drivers/input/keyboard/cap11xx.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -47,6 +48,20 @@ #define CAP11XX_REG_CONFIG2 0x44 #define CAP11XX_REG_CONFIG2_ALT_POL BIT(6) #define CAP11XX_REG_SENSOR_BASE_CNT(X) (0x50 + (X)) +#define CAP11XX_REG_LED_POLARITY 0x73 +#define CAP11XX_REG_LED_OUTPUT_CONTROL 0x74 + +#define CAP11XX_REG_LED_DUTY_CYCLE_1 0x90 +#define CAP11XX_REG_LED_DUTY_CYCLE_2 0x91 +#define CAP11XX_REG_LED_DUTY_CYCLE_3 0x92 +#define CAP11XX_REG_LED_DUTY_CYCLE_4 0x93 + +#define CAP11XX_REG_LED_DUTY_MIN_MASK (0x0f) +#define CAP11XX_REG_LED_DUTY_MIN_MASK_SHIFT (0) +#define CAP11XX_REG_LED_DUTY_MAX_MASK (0xf0) +#define CAP11XX_REG_LED_DUTY_MAX_MASK_SHIFT (4) +#define CAP11XX_REG_LED_DUTY_MAX_VALUE (15) + #define CAP11XX_REG_SENSOR_CALIB (0xb1 + (X)) #define CAP11XX_REG_SENSOR_CALIB_LSB1 0xb9 #define CAP11XX_REG_SENSOR_CALIB_LSB2 0xba @@ -56,10 +71,23 @@ #define CAP11XX_MANUFACTURER_ID 0x5d +#ifdef CONFIG_LEDS_CLASS +struct cap11xx_led { + struct cap11xx_priv *priv; + struct led_classdev cdev; + struct work_struct work; + u32 reg; + enum led_brightness new_brightness; +}; +#endif + struct cap11xx_priv { struct regmap *regmap; struct input_dev *idev; + struct cap11xx_led *leds; + int num_leds; + /* config */ u32 keycodes[]; }; @@ -67,6 +95,7 @@ struct cap11xx_priv { struct cap11xx_hw_model { u8 product_id; unsigned int num_channels; + unsigned int num_leds; }; enum { @@ -76,9 +105,9 @@ enum { }; static const struct cap11xx_hw_model cap11xx_devices[] = { - [CAP1106] = { .product_id = 0x55, .num_channels = 6 }, - [CAP1126] = { .product_id = 0x53, .num_channels = 6 }, - [CAP1188] = { .product_id = 0x50, .num_channels = 8 }, + [CAP1106] = { .product_id = 0x55, .num_channels = 6, .num_leds = 0 }, + [CAP1126] = { .product_id = 0x53, .num_channels = 6, .num_leds = 2 }, + [CAP1188] = { .product_id = 0x50, .num_channels = 8, .num_leds = 8 }, }; static const struct reg_default cap11xx_reg_defaults[] = { @@ -111,6 +140,7 @@ static const struct reg_default cap11xx_reg_defaults[] = { { CAP11XX_REG_STANDBY_SENSITIVITY, 0x02 }, { CAP11XX_REG_STANDBY_THRESH, 0x40 }, { CAP11XX_REG_CONFIG2, 0x40 }, + { CAP11XX_REG_LED_POLARITY, 0x00 }, { CAP11XX_REG_SENSOR_CALIB_LSB1, 0x00 }, { CAP11XX_REG_SENSOR_CALIB_LSB2, 0x00 }, }; @@ -177,6 +207,13 @@ out: static int cap11xx_set_sleep(struct cap11xx_priv *priv, bool sleep) { +#ifdef CONFIG_LEDS_CLASS + /* + * DLSEEP mode will turn off all LEDS, prevent this + */ + if (priv->num_leds) + return 0; +#endif return regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, CAP11XX_REG_MAIN_CONTROL_DLSEEP, sleep ? CAP11XX_REG_MAIN_CONTROL_DLSEEP : 0); @@ -196,6 +233,99 @@ static void cap11xx_input_close(struct input_dev *idev) cap11xx_set_sleep(priv, true); } +#ifdef CONFIG_LEDS_CLASS +static void cap11xx_led_work(struct work_struct *work) +{ + struct cap11xx_led *led = container_of(work, struct cap11xx_led, work); + struct cap11xx_priv *priv = led->priv; + int value = led->new_brightness; + + /* + * All LEDs share the same duty cycle as this is a HW limitation. + * Brightness levels per LED are either 0 (OFF) and 1 (ON). + */ + regmap_update_bits(priv->regmap, CAP11XX_REG_LED_OUTPUT_CONTROL, + BIT(led->reg), value ? BIT(led->reg) : 0); +} + +static void cap11xx_led_set(struct led_classdev *cdev, + enum led_brightness value) +{ + struct cap11xx_led *led = container_of(cdev, struct cap11xx_led, cdev); + + if (led->new_brightness == value) + return; + + led->new_brightness = value; + schedule_work(&led->work); +} + +static int cap11xx_init_leds(struct device *dev, + struct cap11xx_priv *priv, int num_leds) +{ + struct device_node *node = dev->of_node, *child; + struct cap11xx_led *led; + int cnt = of_get_child_count(node); + int error; + + if (!num_leds || !cnt) + return 0; + if (cnt > num_leds) + return -EINVAL; + + led = devm_kcalloc(dev, cnt, + sizeof(struct cap11xx_led), GFP_KERNEL); + if (!led) + return -ENOMEM; + priv->leds = led; + + error = regmap_update_bits(priv->regmap, + CAP11XX_REG_LED_OUTPUT_CONTROL, 0xff, 0); + if (error) + return error; + error = regmap_update_bits(priv->regmap, CAP11XX_REG_LED_DUTY_CYCLE_4, + CAP11XX_REG_LED_DUTY_MAX_MASK, + CAP11XX_REG_LED_DUTY_MAX_VALUE << + CAP11XX_REG_LED_DUTY_MAX_MASK_SHIFT); + if (error) + return error; + + for_each_child_of_node(node, child) { + u32 reg; + + led->cdev.name = + of_get_property(child, "label", NULL) ? : child->name; + led->cdev.default_trigger = + of_get_property(child, "linux,default-trigger", NULL); + led->cdev.flags = 0; + led->cdev.brightness_set = cap11xx_led_set; + led->cdev.max_brightness = 1; + led->cdev.brightness = LED_OFF; + + error = of_property_read_u32(child, "reg", ®); + if (error != 0 || reg >= num_leds) + return -EINVAL; + led->reg = reg; + led->priv = priv; + + INIT_WORK(&led->work, cap11xx_led_work); + error = devm_led_classdev_register(dev, &led->cdev); + if (error < 0) + return -EINVAL; + priv->num_leds++; + led++; + }; + + return 0; +} +#else +static int cap11xx_init_leds(struct device *dev, + struct cap11xx_priv *priv, int num_leds) +{ + return 0; +} +#endif + static int cap11xx_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id) { @@ -316,6 +446,10 @@ static int cap11xx_i2c_probe(struct i2c_client *i2c_client, priv->idev->open = cap11xx_input_open; priv->idev->close = cap11xx_input_close; + error = cap11xx_init_leds(dev, priv, cap->num_leds); + if (error) + return error; + input_set_drvdata(priv->idev, priv); /*