From patchwork Tue Feb 1 13:47:39 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anirudh Ghayal X-Patchwork-Id: 522701 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p11DoCVg015187 for ; Tue, 1 Feb 2011 13:50:13 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756790Ab1BANsb (ORCPT ); Tue, 1 Feb 2011 08:48:31 -0500 Received: from wolverine01.qualcomm.com ([199.106.114.254]:27621 "EHLO wolverine01.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754021Ab1BANsa (ORCPT ); Tue, 1 Feb 2011 08:48:30 -0500 X-IronPort-AV: E=McAfee;i="5400,1158,6243"; a="72780257" Received: from pdmz-ns-mip.qualcomm.com (HELO mostmsg01.qualcomm.com) ([199.106.114.10]) by wolverine01.qualcomm.com with ESMTP/TLS/ADH-AES256-SHA; 01 Feb 2011 05:48:29 -0800 Received: from aghayal-linux.in.qualcomm.com (pdmz-snip-v218.qualcomm.com [192.168.218.1]) by mostmsg01.qualcomm.com (Postfix) with ESMTPA id 7F0C510004D1; Tue, 1 Feb 2011 05:48:15 -0800 (PST) From: Anirudh Ghayal To: linux-kernel@vger.kernel.org Cc: linux-input@vger.kernel.org, rtc-linux@googlegroups.com, linux-arm-msm@vger.kernel.org, Trilok Soni , Dmitry Torokhov , Lars-Peter Clausen Subject: [RFC v2 PATCH 3/7] led: pmic8058: Add PMIC8058 leds driver Date: Tue, 1 Feb 2011 19:17:39 +0530 Message-Id: <1296568063-12010-4-git-send-email-aghayal@codeaurora.org> X-Mailer: git-send-email 1.7.3.5 In-Reply-To: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> References: <1296568063-12010-1-git-send-email-aghayal@codeaurora.org> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Tue, 01 Feb 2011 13:50:13 +0000 (UTC) diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 6f190f4..235a1e5 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -250,6 +250,17 @@ config LEDS_PCA955X LED driver chips accessed via the I2C bus. Supported devices include PCA9550, PCA9551, PCA9552, and PCA9553. +config LEDS_PMIC8058 + tristate "LED Support for Qualcomm PMIC8058" + depends on PMIC8058 + help + This option enables support for LEDs connected over PMIC8058 + (Power Management IC) chip on Qualcomm reference boards, + for example SURF and FFAs. + + To compile this driver as a module, choose M here: the module will + be called leds-pmic8058. + config LEDS_WM831X_STATUS tristate "LED support for status LEDs on WM831x PMICs" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index aae6989..9706739 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o +obj-$(CONFIG_LEDS_PMIC8058) += leds-pmic8058.o obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o diff --git a/drivers/leds/leds-pmic8058.c b/drivers/leds/leds-pmic8058.c new file mode 100644 index 0000000..fb3d7be --- /dev/null +++ b/drivers/leds/leds-pmic8058.c @@ -0,0 +1,360 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SSBI_REG_ADDR_DRV_KEYPAD 0x48 +#define PM8058_DRV_KEYPAD_BL_MASK 0xf0 +#define PM8058_DRV_KEYPAD_BL_SHIFT 0x04 + +#define SSBI_REG_ADDR_FLASH_DRV0 0x49 +#define PM8058_DRV_FLASH_MASK 0xf0 +#define PM8058_DRV_FLASH_SHIFT 0x04 + +#define SSBI_REG_ADDR_FLASH_DRV1 0xFB + +#define SSBI_REG_ADDR_LED_CTRL_BASE 0x131 +#define SSBI_REG_ADDR_LED_CTRL(n) (SSBI_REG_ADDR_LED_CTRL_BASE + (n)) +#define PM8058_DRV_LED_CTRL_MASK 0xf8 +#define PM8058_DRV_LED_CTRL_SHIFT 0x03 + +#define MAX_FLASH_LED_CURRENT 300 +#define MAX_LC_LED_CURRENT 40 +#define MAX_KP_BL_LED_CURRENT 300 + +#define MAX_KEYPAD_BL_LEVEL (1 << 4) +#define MAX_LED_DRV_LEVEL 20 /* 2 * 20 mA */ + +#define PMIC8058_LED_OFFSET(id) ((id) - PMIC8058_ID_LED_0) + +#define MAX_KB_LED_BRIGHTNESS 15 +#define MAX_LC_LED_BRIGHTNESS 20 +#define MAX_FLASH_LED_BRIGHTNESS 15 + +#define PMIC8058_MAX_LEDS 7 + +/** + * struct pmic8058_led_data - internal led data structure + * @led_classdev - led class device + * @id - led index + * @led_brightness - led brightness levels + * @pm_chip - parent MFD core device + * @work - workqueue for led + * @lock - to protect the transactions + * @reg - cached value of led register + */ +struct pmic8058_led_data { + struct led_classdev cdev; + int id; + u8 reg; + enum led_brightness brightness; + struct pm8058_chip *pm_chip; + struct work_struct work; + struct mutex lock; +}; + +#define PM8058_MAX_LEDS 7 + +static void led_kp_set(struct pmic8058_led_data *led, enum led_brightness value) +{ + int rc; + u8 level; + + level = (value << PM8058_DRV_KEYPAD_BL_SHIFT) & + PM8058_DRV_KEYPAD_BL_MASK; + + led->reg &= ~PM8058_DRV_KEYPAD_BL_MASK; + led->reg |= level; + + rc = pm8058_write(led->pm_chip, SSBI_REG_ADDR_DRV_KEYPAD, + &led->reg, 1); + if (rc < 0) + dev_err(led->cdev.dev, "can't set keypad backlight level\n"); +} + +static void led_lc_set(struct pmic8058_led_data *led, enum led_brightness value) +{ + int rc, offset; + u8 level; + + level = (value << PM8058_DRV_LED_CTRL_SHIFT) & + PM8058_DRV_LED_CTRL_MASK; + + offset = PMIC8058_LED_OFFSET(led->id); + + led->reg &= ~PM8058_DRV_LED_CTRL_MASK; + led->reg |= level; + + rc = pm8058_write(led->pm_chip, SSBI_REG_ADDR_LED_CTRL(offset), + &led->reg, 1); + if (rc) + dev_err(led->cdev.dev, "can't set (%d) led value\n", + led->id); +} + +static void +led_flash_set(struct pmic8058_led_data *led, enum led_brightness value) +{ + int rc; + u8 level; + u16 reg_addr; + + level = (value << PM8058_DRV_FLASH_SHIFT) & + PM8058_DRV_FLASH_MASK; + + led->reg &= ~PM8058_DRV_FLASH_MASK; + led->reg |= level; + + if (led->id == PMIC8058_ID_FLASH_LED_0) + reg_addr = SSBI_REG_ADDR_FLASH_DRV0; + else + reg_addr = SSBI_REG_ADDR_FLASH_DRV1; + + rc = pm8058_write(led->pm_chip, reg_addr, &led->reg, 1); + if (rc < 0) + dev_err(led->cdev.dev, "can't set flash led%d level\n", + led->id); +} + +static void pmic8058_led_work(struct work_struct *work) +{ + struct pmic8058_led_data *led = container_of(work, + struct pmic8058_led_data, work); + + mutex_lock(&led->lock); + + switch (led->id) { + case PMIC8058_ID_LED_KB_LIGHT: + led_kp_set(led, led->brightness); + break; + case PMIC8058_ID_LED_0: + case PMIC8058_ID_LED_1: + case PMIC8058_ID_LED_2: + led_lc_set(led, led->brightness); + break; + case PMIC8058_ID_FLASH_LED_0: + case PMIC8058_ID_FLASH_LED_1: + led_flash_set(led, led->brightness); + break; + } + + mutex_unlock(&led->lock); +} + +static void pmic8058_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + struct pmic8058_led_data *led; + + led = container_of(led_cdev, struct pmic8058_led_data, cdev); + + led->brightness = value; + schedule_work(&led->work); +} + +static enum led_brightness pmic8058_led_get(struct led_classdev *led_cdev) +{ + struct pmic8058_led_data *led; + + led = container_of(led_cdev, struct pmic8058_led_data, cdev); + + return led->brightness; +} + +static int get_max_brightness(enum pmic8058_leds id) +{ + switch (id) { + case PMIC8058_ID_LED_KB_LIGHT: + return MAX_KB_LED_BRIGHTNESS; + case PMIC8058_ID_LED_0: + case PMIC8058_ID_LED_1: + case PMIC8058_ID_LED_2: + return MAX_LC_LED_BRIGHTNESS; + case PMIC8058_ID_FLASH_LED_0: + case PMIC8058_ID_FLASH_LED_1: + return MAX_FLASH_LED_CURRENT; + default: + return 0; + } +} + +static int get_init_value(struct pmic8058_led_data *led, u8 *val) +{ + int rc, offset; + u16 addr; + + switch (led->id) { + case PMIC8058_ID_LED_KB_LIGHT: + addr = SSBI_REG_ADDR_DRV_KEYPAD; + break; + case PMIC8058_ID_LED_0: + case PMIC8058_ID_LED_1: + case PMIC8058_ID_LED_2: + offset = PMIC8058_LED_OFFSET(led->id); + addr = SSBI_REG_ADDR_LED_CTRL(offset); + break; + case PMIC8058_ID_FLASH_LED_0: + addr = SSBI_REG_ADDR_FLASH_DRV0; + break; + case PMIC8058_ID_FLASH_LED_1: + addr = SSBI_REG_ADDR_FLASH_DRV1; + break; + } + + rc = pm8058_read(led->pm_chip, addr, val, 1); + if (rc) + dev_err(led->cdev.dev, "can't get led(%d) level\n", led->id); + + return rc; +} + +static int __devinit pmic8058_led_probe(struct platform_device *pdev) +{ + const struct pmic8058_leds_platform_data *pdata = + pdev->dev.platform_data; + struct pmic8058_led_data *led_dat; + struct pmic8058_led *curr_led; + int rc, i; + struct pm8058_chip *pm_chip; + struct pmic8058_led_data *led; + + pm_chip = platform_get_drvdata(pdev); + if (pm_chip == NULL) { + dev_err(&pdev->dev, "no parent data passed in\n"); + return -EINVAL; + } + + if (pdata == NULL) { + dev_err(&pdev->dev, "platform data not supplied\n"); + return -EINVAL; + } + + if (pdata->num_leds > PMIC8058_MAX_LEDS) { + dev_err(&pdev->dev, "can't handle more than %d LEDs\n", + PMIC8058_MAX_LEDS); + return -EFAULT; + } + + led = kcalloc(pdata->num_leds, sizeof(*led), GFP_KERNEL); + if (led == NULL) { + dev_err(&pdev->dev, "failed to alloc memory\n"); + return -ENOMEM; + } + + for (i = 0; i < pdata->num_leds; i++) { + curr_led = &pdata->leds[i]; + led_dat = &led[curr_led->id]; + + led_dat->id = curr_led->id; + + if (!((led_dat->id >= PMIC8058_ID_LED_KB_LIGHT) && + (led_dat->id <= PMIC8058_ID_FLASH_LED_1))) { + dev_err(&pdev->dev, "invalid LED ID (%d) specified\n", + led_dat->id); + rc = -EINVAL; + goto fail_id_check; + } + + led_dat->cdev.name = curr_led->name; + led_dat->cdev.default_trigger = curr_led->default_trigger; + led_dat->cdev.brightness_set = pmic8058_led_set; + led_dat->cdev.brightness_get = pmic8058_led_get; + led_dat->cdev.brightness = LED_OFF; + led_dat->cdev.flags = LED_CORE_SUSPENDRESUME; + + led_dat->cdev.max_brightness = get_max_brightness(led_dat->id); + led_dat->pm_chip = pm_chip; + + rc = get_init_value(led_dat, &led_dat->reg); + if (rc < 0) + goto fail_id_check; + + mutex_init(&led_dat->lock); + INIT_WORK(&led_dat->work, pmic8058_led_work); + + rc = led_classdev_register(&pdev->dev, &led_dat->cdev); + if (rc) { + dev_err(&pdev->dev, "unable to register led %d\n", + led_dat->id); + goto fail_id_check; + } + } + + platform_set_drvdata(pdev, led); + + return 0; + +fail_id_check: + if (i > 0) { + for (i = i - 1; i >= 0; i--) + led_classdev_unregister(&led[i].cdev); + } + kfree(led); + return rc; +} + +static int __devexit pmic8058_led_remove(struct platform_device *pdev) +{ + int i; + const struct pmic8058_leds_platform_data *pdata = + pdev->dev.platform_data; + struct pmic8058_led_data *led = platform_get_drvdata(pdev); + + for (i = 0; i < pdata->num_leds; i++) { + mutex_destroy(&led[led->id].lock); + led_classdev_unregister(&led[led->id].cdev); + cancel_work_sync(&led[led->id].work); + } + + kfree(led); + + return 0; +} + +static struct platform_driver pmic8058_led_driver = { + .probe = pmic8058_led_probe, + .remove = __devexit_p(pmic8058_led_remove), + .driver = { + .name = "pm8058-led", + .owner = THIS_MODULE, + }, +}; + +static int __init pmic8058_led_init(void) +{ + return platform_driver_register(&pmic8058_led_driver); +} +module_init(pmic8058_led_init); + +static void __exit pmic8058_led_exit(void) +{ + platform_driver_unregister(&pmic8058_led_driver); +} +module_exit(pmic8058_led_exit); + +MODULE_DESCRIPTION("PMIC8058 LEDs driver"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("1.0"); +MODULE_ALIAS("platform:pmic8058-led"); +MODULE_AUTHOR("Trilok Soni "); diff --git a/include/linux/leds-pmic8058.h b/include/linux/leds-pmic8058.h new file mode 100644 index 0000000..42a3ae7 --- /dev/null +++ b/include/linux/leds-pmic8058.h @@ -0,0 +1,61 @@ +/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef __LEDS_PMIC8058_H__ +#define __LEDS_PMIC8058_H__ + +/** + * enum pmic8058_leds - PMIC8058 supported led ids + * @PMIC8058_ID_LED_KB_LIGHT - keyboard backlight led + * @PMIC8058_ID_LED_0 - First low current led + * @PMIC8058_ID_LED_1 - Second low current led + * @PMIC8058_ID_LED_2 - Third low current led + * @PMIC8058_ID_FLASH_LED_0 - First flash led + * @PMIC8058_ID_FLASH_LED_0 - Second flash led + */ +enum pmic8058_leds { + PMIC8058_ID_LED_KB_LIGHT = 1, + PMIC8058_ID_LED_0, + PMIC8058_ID_LED_1, + PMIC8058_ID_LED_2, + PMIC8058_ID_FLASH_LED_0, + PMIC8058_ID_FLASH_LED_1, +}; + +/** + * struct pmic8058_led - per led data + * @name - name of the led + * @default_trigger - default trigger which needs to e attached + * @id - supported led id + */ +struct pmic8058_led { + const char *name; + const char *default_trigger; + enum pmic8058_leds id; +}; + +/** + * struct pmic8058_leds_platform_data - platform data for leds + * @num_leds - number of leds + * @leds - array of struct pmic8058_led + */ +struct pmic8058_leds_platform_data { + int num_leds; + struct pmic8058_led *leds; +}; + +#endif /* __LEDS_PMIC8058_H__ */