1c746b5519a88b8803d43946ad06326ece4829116Mark Brown/* 2c746b5519a88b8803d43946ad06326ece4829116Mark Brown * LED driver for WM831x status LEDs 3c746b5519a88b8803d43946ad06326ece4829116Mark Brown * 4c746b5519a88b8803d43946ad06326ece4829116Mark Brown * Copyright(C) 2009 Wolfson Microelectronics PLC. 5c746b5519a88b8803d43946ad06326ece4829116Mark Brown * 6c746b5519a88b8803d43946ad06326ece4829116Mark Brown * This program is free software; you can redistribute it and/or modify 7c746b5519a88b8803d43946ad06326ece4829116Mark Brown * it under the terms of the GNU General Public License version 2 as 8c746b5519a88b8803d43946ad06326ece4829116Mark Brown * published by the Free Software Foundation. 9c746b5519a88b8803d43946ad06326ece4829116Mark Brown * 10c746b5519a88b8803d43946ad06326ece4829116Mark Brown */ 11c746b5519a88b8803d43946ad06326ece4829116Mark Brown 12c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/kernel.h> 13c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/init.h> 14c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/platform_device.h> 155a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 16c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/leds.h> 17c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/err.h> 18c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/mfd/wm831x/core.h> 19c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/mfd/wm831x/pdata.h> 20c746b5519a88b8803d43946ad06326ece4829116Mark Brown#include <linux/mfd/wm831x/status.h> 2154f4dedb5368fff81b722b551e2f15a75175d7b7Paul Gortmaker#include <linux/module.h> 22c746b5519a88b8803d43946ad06326ece4829116Mark Brown 23c746b5519a88b8803d43946ad06326ece4829116Mark Brown 24c746b5519a88b8803d43946ad06326ece4829116Mark Brownstruct wm831x_status { 25c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct led_classdev cdev; 26c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x *wm831x; 27c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct work_struct work; 28c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct mutex mutex; 29c746b5519a88b8803d43946ad06326ece4829116Mark Brown 30c746b5519a88b8803d43946ad06326ece4829116Mark Brown spinlock_t value_lock; 31c746b5519a88b8803d43946ad06326ece4829116Mark Brown int reg; /* Control register */ 32c746b5519a88b8803d43946ad06326ece4829116Mark Brown int reg_val; /* Control register value */ 33c746b5519a88b8803d43946ad06326ece4829116Mark Brown 34c746b5519a88b8803d43946ad06326ece4829116Mark Brown int blink; 35c746b5519a88b8803d43946ad06326ece4829116Mark Brown int blink_time; 36c746b5519a88b8803d43946ad06326ece4829116Mark Brown int blink_cyc; 37c746b5519a88b8803d43946ad06326ece4829116Mark Brown int src; 38c746b5519a88b8803d43946ad06326ece4829116Mark Brown enum led_brightness brightness; 39c746b5519a88b8803d43946ad06326ece4829116Mark Brown}; 40c746b5519a88b8803d43946ad06326ece4829116Mark Brown 41c746b5519a88b8803d43946ad06326ece4829116Mark Brown#define to_wm831x_status(led_cdev) \ 42c746b5519a88b8803d43946ad06326ece4829116Mark Brown container_of(led_cdev, struct wm831x_status, cdev) 43c746b5519a88b8803d43946ad06326ece4829116Mark Brown 44c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic void wm831x_status_work(struct work_struct *work) 45c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 46c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *led = container_of(work, struct wm831x_status, 47c746b5519a88b8803d43946ad06326ece4829116Mark Brown work); 48c746b5519a88b8803d43946ad06326ece4829116Mark Brown unsigned long flags; 49c746b5519a88b8803d43946ad06326ece4829116Mark Brown 50c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_lock(&led->mutex); 51c746b5519a88b8803d43946ad06326ece4829116Mark Brown 52c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val &= ~(WM831X_LED_SRC_MASK | WM831X_LED_MODE_MASK | 53c746b5519a88b8803d43946ad06326ece4829116Mark Brown WM831X_LED_DUTY_CYC_MASK | WM831X_LED_DUR_MASK); 54c746b5519a88b8803d43946ad06326ece4829116Mark Brown 55c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_lock_irqsave(&led->value_lock, flags); 56c746b5519a88b8803d43946ad06326ece4829116Mark Brown 57c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val |= led->src << WM831X_LED_SRC_SHIFT; 58c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (led->blink) { 59c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val |= 2 << WM831X_LED_MODE_SHIFT; 60c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val |= led->blink_time << WM831X_LED_DUR_SHIFT; 61c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val |= led->blink_cyc; 62c746b5519a88b8803d43946ad06326ece4829116Mark Brown } else { 63c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (led->brightness != LED_OFF) 64c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->reg_val |= 1 << WM831X_LED_MODE_SHIFT; 65c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 66c746b5519a88b8803d43946ad06326ece4829116Mark Brown 67c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_unlock_irqrestore(&led->value_lock, flags); 68c746b5519a88b8803d43946ad06326ece4829116Mark Brown 69c746b5519a88b8803d43946ad06326ece4829116Mark Brown wm831x_reg_write(led->wm831x, led->reg, led->reg_val); 70c746b5519a88b8803d43946ad06326ece4829116Mark Brown 71c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_unlock(&led->mutex); 72c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 73c746b5519a88b8803d43946ad06326ece4829116Mark Brown 74c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic void wm831x_status_set(struct led_classdev *led_cdev, 75c746b5519a88b8803d43946ad06326ece4829116Mark Brown enum led_brightness value) 76c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 77c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *led = to_wm831x_status(led_cdev); 78c746b5519a88b8803d43946ad06326ece4829116Mark Brown unsigned long flags; 79c746b5519a88b8803d43946ad06326ece4829116Mark Brown 80c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_lock_irqsave(&led->value_lock, flags); 81c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->brightness = value; 82c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (value == LED_OFF) 83c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink = 0; 84c746b5519a88b8803d43946ad06326ece4829116Mark Brown schedule_work(&led->work); 85c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_unlock_irqrestore(&led->value_lock, flags); 86c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 87c746b5519a88b8803d43946ad06326ece4829116Mark Brown 88c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic int wm831x_status_blink_set(struct led_classdev *led_cdev, 89c746b5519a88b8803d43946ad06326ece4829116Mark Brown unsigned long *delay_on, 90c746b5519a88b8803d43946ad06326ece4829116Mark Brown unsigned long *delay_off) 91c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 92c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *led = to_wm831x_status(led_cdev); 93c746b5519a88b8803d43946ad06326ece4829116Mark Brown unsigned long flags; 94c746b5519a88b8803d43946ad06326ece4829116Mark Brown int ret = 0; 95c746b5519a88b8803d43946ad06326ece4829116Mark Brown 96c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* Pick some defaults if we've not been given times */ 97c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (*delay_on == 0 && *delay_off == 0) { 98c746b5519a88b8803d43946ad06326ece4829116Mark Brown *delay_on = 250; 99c746b5519a88b8803d43946ad06326ece4829116Mark Brown *delay_off = 250; 100c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 101c746b5519a88b8803d43946ad06326ece4829116Mark Brown 102c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_lock_irqsave(&led->value_lock, flags); 103c746b5519a88b8803d43946ad06326ece4829116Mark Brown 104c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* We only have a limited selection of settings, see if we can 105c746b5519a88b8803d43946ad06326ece4829116Mark Brown * support the configuration we're being given */ 106c746b5519a88b8803d43946ad06326ece4829116Mark Brown switch (*delay_on) { 107c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 1000: 108c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_time = 0; 109c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 110c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 250: 111c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_time = 1; 112c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 113c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 125: 114c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_time = 2; 115c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 116c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 62: 117c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 63: 118c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* Actually 62.5ms */ 119c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_time = 3; 120c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 121c746b5519a88b8803d43946ad06326ece4829116Mark Brown default: 122c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret = -EINVAL; 123c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 124c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 125c746b5519a88b8803d43946ad06326ece4829116Mark Brown 126c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (ret == 0) { 127c746b5519a88b8803d43946ad06326ece4829116Mark Brown switch (*delay_off / *delay_on) { 128c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 1: 129c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_cyc = 0; 130c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 131c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 3: 132c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_cyc = 1; 133c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 134c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 4: 135c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_cyc = 2; 136c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 137c746b5519a88b8803d43946ad06326ece4829116Mark Brown case 8: 138c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink_cyc = 3; 139c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 140c746b5519a88b8803d43946ad06326ece4829116Mark Brown default: 141c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret = -EINVAL; 142c746b5519a88b8803d43946ad06326ece4829116Mark Brown break; 143c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 144c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 145c746b5519a88b8803d43946ad06326ece4829116Mark Brown 146c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (ret == 0) 147c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink = 1; 148c746b5519a88b8803d43946ad06326ece4829116Mark Brown else 149c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->blink = 0; 150c746b5519a88b8803d43946ad06326ece4829116Mark Brown 151c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* Always update; if we fail turn off blinking since we expect 152c746b5519a88b8803d43946ad06326ece4829116Mark Brown * a software fallback. */ 153c746b5519a88b8803d43946ad06326ece4829116Mark Brown schedule_work(&led->work); 154c746b5519a88b8803d43946ad06326ece4829116Mark Brown 155c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_unlock_irqrestore(&led->value_lock, flags); 156c746b5519a88b8803d43946ad06326ece4829116Mark Brown 157c746b5519a88b8803d43946ad06326ece4829116Mark Brown return ret; 158c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 159c746b5519a88b8803d43946ad06326ece4829116Mark Brown 160c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic const char *led_src_texts[] = { 161c746b5519a88b8803d43946ad06326ece4829116Mark Brown "otp", 162c746b5519a88b8803d43946ad06326ece4829116Mark Brown "power", 163c746b5519a88b8803d43946ad06326ece4829116Mark Brown "charger", 164c746b5519a88b8803d43946ad06326ece4829116Mark Brown "soft", 165c746b5519a88b8803d43946ad06326ece4829116Mark Brown}; 166c746b5519a88b8803d43946ad06326ece4829116Mark Brown 167c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic ssize_t wm831x_status_src_show(struct device *dev, 168c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct device_attribute *attr, char *buf) 169c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 170c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct led_classdev *led_cdev = dev_get_drvdata(dev); 171c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *led = to_wm831x_status(led_cdev); 172c746b5519a88b8803d43946ad06326ece4829116Mark Brown int i; 173c746b5519a88b8803d43946ad06326ece4829116Mark Brown ssize_t ret = 0; 174c746b5519a88b8803d43946ad06326ece4829116Mark Brown 175c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_lock(&led->mutex); 176c746b5519a88b8803d43946ad06326ece4829116Mark Brown 177c746b5519a88b8803d43946ad06326ece4829116Mark Brown for (i = 0; i < ARRAY_SIZE(led_src_texts); i++) 178c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (i == led->src) 179c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret += sprintf(&buf[ret], "[%s] ", led_src_texts[i]); 180c746b5519a88b8803d43946ad06326ece4829116Mark Brown else 181c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret += sprintf(&buf[ret], "%s ", led_src_texts[i]); 182c746b5519a88b8803d43946ad06326ece4829116Mark Brown 183c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_unlock(&led->mutex); 184c746b5519a88b8803d43946ad06326ece4829116Mark Brown 185c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret += sprintf(&buf[ret], "\n"); 186c746b5519a88b8803d43946ad06326ece4829116Mark Brown 187c746b5519a88b8803d43946ad06326ece4829116Mark Brown return ret; 188c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 189c746b5519a88b8803d43946ad06326ece4829116Mark Brown 190c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic ssize_t wm831x_status_src_store(struct device *dev, 191c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct device_attribute *attr, 192c746b5519a88b8803d43946ad06326ece4829116Mark Brown const char *buf, size_t size) 193c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 194c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct led_classdev *led_cdev = dev_get_drvdata(dev); 195c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *led = to_wm831x_status(led_cdev); 196c746b5519a88b8803d43946ad06326ece4829116Mark Brown char name[20]; 197c746b5519a88b8803d43946ad06326ece4829116Mark Brown int i; 198c746b5519a88b8803d43946ad06326ece4829116Mark Brown size_t len; 199c746b5519a88b8803d43946ad06326ece4829116Mark Brown 200c746b5519a88b8803d43946ad06326ece4829116Mark Brown name[sizeof(name) - 1] = '\0'; 201c746b5519a88b8803d43946ad06326ece4829116Mark Brown strncpy(name, buf, sizeof(name) - 1); 202c746b5519a88b8803d43946ad06326ece4829116Mark Brown len = strlen(name); 203c746b5519a88b8803d43946ad06326ece4829116Mark Brown 204c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (len && name[len - 1] == '\n') 205c746b5519a88b8803d43946ad06326ece4829116Mark Brown name[len - 1] = '\0'; 206c746b5519a88b8803d43946ad06326ece4829116Mark Brown 207c746b5519a88b8803d43946ad06326ece4829116Mark Brown for (i = 0; i < ARRAY_SIZE(led_src_texts); i++) { 208c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (!strcmp(name, led_src_texts[i])) { 209c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_lock(&led->mutex); 210c746b5519a88b8803d43946ad06326ece4829116Mark Brown 211c746b5519a88b8803d43946ad06326ece4829116Mark Brown led->src = i; 212c746b5519a88b8803d43946ad06326ece4829116Mark Brown schedule_work(&led->work); 213c746b5519a88b8803d43946ad06326ece4829116Mark Brown 214c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_unlock(&led->mutex); 215c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 216c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 217c746b5519a88b8803d43946ad06326ece4829116Mark Brown 218c746b5519a88b8803d43946ad06326ece4829116Mark Brown return size; 219c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 220c746b5519a88b8803d43946ad06326ece4829116Mark Brown 221c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic DEVICE_ATTR(src, 0644, wm831x_status_src_show, wm831x_status_src_store); 222c746b5519a88b8803d43946ad06326ece4829116Mark Brown 223c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic int wm831x_status_probe(struct platform_device *pdev) 224c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 225c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 226c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_pdata *chip_pdata; 227c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status_pdata pdata; 228c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *drvdata; 229c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct resource *res; 230c746b5519a88b8803d43946ad06326ece4829116Mark Brown int id = pdev->id % ARRAY_SIZE(chip_pdata->status); 231c746b5519a88b8803d43946ad06326ece4829116Mark Brown int ret; 232c746b5519a88b8803d43946ad06326ece4829116Mark Brown 233c746b5519a88b8803d43946ad06326ece4829116Mark Brown res = platform_get_resource(pdev, IORESOURCE_IO, 0); 234c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (res == NULL) { 235c746b5519a88b8803d43946ad06326ece4829116Mark Brown dev_err(&pdev->dev, "No I/O resource\n"); 236c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret = -EINVAL; 237c746b5519a88b8803d43946ad06326ece4829116Mark Brown goto err; 238c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 239c746b5519a88b8803d43946ad06326ece4829116Mark Brown 2401713cb9d6069fac581fcea928f65ca6ca7c9facfMark Brown drvdata = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_status), 2411713cb9d6069fac581fcea928f65ca6ca7c9facfMark Brown GFP_KERNEL); 242c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (!drvdata) 243c746b5519a88b8803d43946ad06326ece4829116Mark Brown return -ENOMEM; 244c746b5519a88b8803d43946ad06326ece4829116Mark Brown dev_set_drvdata(&pdev->dev, drvdata); 245c746b5519a88b8803d43946ad06326ece4829116Mark Brown 246c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->wm831x = wm831x; 247c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->reg = res->start; 248c746b5519a88b8803d43946ad06326ece4829116Mark Brown 249c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (wm831x->dev->platform_data) 250c746b5519a88b8803d43946ad06326ece4829116Mark Brown chip_pdata = wm831x->dev->platform_data; 251c746b5519a88b8803d43946ad06326ece4829116Mark Brown else 252c746b5519a88b8803d43946ad06326ece4829116Mark Brown chip_pdata = NULL; 253c746b5519a88b8803d43946ad06326ece4829116Mark Brown 254c746b5519a88b8803d43946ad06326ece4829116Mark Brown memset(&pdata, 0, sizeof(pdata)); 255c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (chip_pdata && chip_pdata->status[id]) 256c746b5519a88b8803d43946ad06326ece4829116Mark Brown memcpy(&pdata, chip_pdata->status[id], sizeof(pdata)); 257c746b5519a88b8803d43946ad06326ece4829116Mark Brown else 258c746b5519a88b8803d43946ad06326ece4829116Mark Brown pdata.name = dev_name(&pdev->dev); 259c746b5519a88b8803d43946ad06326ece4829116Mark Brown 260c746b5519a88b8803d43946ad06326ece4829116Mark Brown mutex_init(&drvdata->mutex); 261c746b5519a88b8803d43946ad06326ece4829116Mark Brown INIT_WORK(&drvdata->work, wm831x_status_work); 262c746b5519a88b8803d43946ad06326ece4829116Mark Brown spin_lock_init(&drvdata->value_lock); 263c746b5519a88b8803d43946ad06326ece4829116Mark Brown 264c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* We cache the configuration register and read startup values 265c746b5519a88b8803d43946ad06326ece4829116Mark Brown * from it. */ 266c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->reg_val = wm831x_reg_read(wm831x, drvdata->reg); 267c746b5519a88b8803d43946ad06326ece4829116Mark Brown 268c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (drvdata->reg_val & WM831X_LED_MODE_MASK) 269c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->brightness = LED_FULL; 270c746b5519a88b8803d43946ad06326ece4829116Mark Brown else 271c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->brightness = LED_OFF; 272c746b5519a88b8803d43946ad06326ece4829116Mark Brown 273c746b5519a88b8803d43946ad06326ece4829116Mark Brown /* Set a default source if configured, otherwise leave the 274c746b5519a88b8803d43946ad06326ece4829116Mark Brown * current hardware setting. 275c746b5519a88b8803d43946ad06326ece4829116Mark Brown */ 276c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (pdata.default_src == WM831X_STATUS_PRESERVE) { 277c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->src = drvdata->reg_val; 278c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->src &= WM831X_LED_SRC_MASK; 279c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->src >>= WM831X_LED_SRC_SHIFT; 280c746b5519a88b8803d43946ad06326ece4829116Mark Brown } else { 281c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->src = pdata.default_src - 1; 282c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 283c746b5519a88b8803d43946ad06326ece4829116Mark Brown 284c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->cdev.name = pdata.name; 285c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->cdev.default_trigger = pdata.default_trigger; 286c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->cdev.brightness_set = wm831x_status_set; 287c746b5519a88b8803d43946ad06326ece4829116Mark Brown drvdata->cdev.blink_set = wm831x_status_blink_set; 288c746b5519a88b8803d43946ad06326ece4829116Mark Brown 289c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret = led_classdev_register(wm831x->dev, &drvdata->cdev); 290c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (ret < 0) { 291c746b5519a88b8803d43946ad06326ece4829116Mark Brown dev_err(&pdev->dev, "Failed to register LED: %d\n", ret); 292c746b5519a88b8803d43946ad06326ece4829116Mark Brown goto err_led; 293c746b5519a88b8803d43946ad06326ece4829116Mark Brown } 294c746b5519a88b8803d43946ad06326ece4829116Mark Brown 295c746b5519a88b8803d43946ad06326ece4829116Mark Brown ret = device_create_file(drvdata->cdev.dev, &dev_attr_src); 296c746b5519a88b8803d43946ad06326ece4829116Mark Brown if (ret != 0) 297c746b5519a88b8803d43946ad06326ece4829116Mark Brown dev_err(&pdev->dev, 298c746b5519a88b8803d43946ad06326ece4829116Mark Brown "No source control for LED: %d\n", ret); 299c746b5519a88b8803d43946ad06326ece4829116Mark Brown 300c746b5519a88b8803d43946ad06326ece4829116Mark Brown return 0; 301c746b5519a88b8803d43946ad06326ece4829116Mark Brown 302c746b5519a88b8803d43946ad06326ece4829116Mark Brownerr_led: 303c746b5519a88b8803d43946ad06326ece4829116Mark Brown led_classdev_unregister(&drvdata->cdev); 304c746b5519a88b8803d43946ad06326ece4829116Mark Brownerr: 305c746b5519a88b8803d43946ad06326ece4829116Mark Brown return ret; 306c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 307c746b5519a88b8803d43946ad06326ece4829116Mark Brown 308c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic int wm831x_status_remove(struct platform_device *pdev) 309c746b5519a88b8803d43946ad06326ece4829116Mark Brown{ 310c746b5519a88b8803d43946ad06326ece4829116Mark Brown struct wm831x_status *drvdata = platform_get_drvdata(pdev); 311c746b5519a88b8803d43946ad06326ece4829116Mark Brown 312c746b5519a88b8803d43946ad06326ece4829116Mark Brown device_remove_file(drvdata->cdev.dev, &dev_attr_src); 313c746b5519a88b8803d43946ad06326ece4829116Mark Brown led_classdev_unregister(&drvdata->cdev); 314c746b5519a88b8803d43946ad06326ece4829116Mark Brown 315c746b5519a88b8803d43946ad06326ece4829116Mark Brown return 0; 316c746b5519a88b8803d43946ad06326ece4829116Mark Brown} 317c746b5519a88b8803d43946ad06326ece4829116Mark Brown 318c746b5519a88b8803d43946ad06326ece4829116Mark Brownstatic struct platform_driver wm831x_status_driver = { 319c746b5519a88b8803d43946ad06326ece4829116Mark Brown .driver = { 320c746b5519a88b8803d43946ad06326ece4829116Mark Brown .name = "wm831x-status", 321c746b5519a88b8803d43946ad06326ece4829116Mark Brown .owner = THIS_MODULE, 322c746b5519a88b8803d43946ad06326ece4829116Mark Brown }, 323c746b5519a88b8803d43946ad06326ece4829116Mark Brown .probe = wm831x_status_probe, 324c746b5519a88b8803d43946ad06326ece4829116Mark Brown .remove = wm831x_status_remove, 325c746b5519a88b8803d43946ad06326ece4829116Mark Brown}; 326c746b5519a88b8803d43946ad06326ece4829116Mark Brown 327892a8843fbef07a7f2ab62d5f7ff5c16ea0903b0Axel Linmodule_platform_driver(wm831x_status_driver); 328c746b5519a88b8803d43946ad06326ece4829116Mark Brown 329c746b5519a88b8803d43946ad06326ece4829116Mark BrownMODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 330c746b5519a88b8803d43946ad06326ece4829116Mark BrownMODULE_DESCRIPTION("WM831x status LED driver"); 331c746b5519a88b8803d43946ad06326ece4829116Mark BrownMODULE_LICENSE("GPL"); 332c746b5519a88b8803d43946ad06326ece4829116Mark BrownMODULE_ALIAS("platform:wm831x-status"); 333