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Release 4.14 drivers/video/backlight/lm3533_bl.c

/*
 * lm3533-bl.c -- LM3533 Backlight driver
 *
 * Copyright (C) 2011-2012 Texas Instruments
 *
 * Author: Johan Hovold <jhovold@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under  the terms of the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the License, or (at your
 * option) any later version.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/slab.h>

#include <linux/mfd/lm3533.h>



#define LM3533_HVCTRLBANK_COUNT		2

#define LM3533_BL_MAX_BRIGHTNESS	255


#define LM3533_REG_CTRLBANK_AB_BCONF	0x1a



struct lm3533_bl {
	
struct lm3533 *lm3533;
	
struct lm3533_ctrlbank cb;
	
struct backlight_device *bd;
	
int id;
};



static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl) { return bl->id; }

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Johan Hovold17100.00%1100.00%
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static int lm3533_bl_update_status(struct backlight_device *bd) { struct lm3533_bl *bl = bl_get_data(bd); int brightness = bd->props.brightness; if (bd->props.power != FB_BLANK_UNBLANK) brightness = 0; if (bd->props.fb_blank != FB_BLANK_UNBLANK) brightness = 0; return lm3533_ctrlbank_set_brightness(&bl->cb, (u8)brightness); }

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Johan Hovold72100.00%1100.00%
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static int lm3533_bl_get_brightness(struct backlight_device *bd) { struct lm3533_bl *bl = bl_get_data(bd); u8 val; int ret; ret = lm3533_ctrlbank_get_brightness(&bl->cb, &val); if (ret) return ret; return val; }

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Johan Hovold50100.00%1100.00%
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static const struct backlight_ops lm3533_bl_ops = { .get_brightness = lm3533_bl_get_brightness, .update_status = lm3533_bl_update_status, };
static ssize_t show_id(struct device *dev, struct device_attribute *attr, char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id); }

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Johan Hovold44100.00%1100.00%
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static ssize_t show_als_channel(struct device *dev, struct device_attribute *attr, char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); unsigned channel = lm3533_bl_get_ctrlbank_id(bl); return scnprintf(buf, PAGE_SIZE, "%u\n", channel); }

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Johan Hovold50100.00%1100.00%
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static ssize_t show_als_en(struct device *dev, struct device_attribute *attr, char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); u8 val; u8 mask; bool enable; int ret; ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); if (ret) return ret; mask = 1 << (2 * ctrlbank); enable = val & mask; return scnprintf(buf, PAGE_SIZE, "%d\n", enable); }

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Johan Hovold99100.00%1100.00%
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static ssize_t store_als_en(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct lm3533_bl *bl = dev_get_drvdata(dev); int ctrlbank = lm3533_bl_get_ctrlbank_id(bl); int enable; u8 val; u8 mask; int ret; if (kstrtoint(buf, 0, &enable)) return -EINVAL; mask = 1 << (2 * ctrlbank); if (enable) val = mask; else val = 0; ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, mask); if (ret) return ret; return len; }

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Johan Hovold118100.00%1100.00%
Total118100.00%1100.00%


static ssize_t show_linear(struct device *dev, struct device_attribute *attr, char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); u8 val; u8 mask; int linear; int ret; ret = lm3533_read(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, &val); if (ret) return ret; mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); if (val & mask) linear = 1; else linear = 0; return scnprintf(buf, PAGE_SIZE, "%x\n", linear); }

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Johan Hovold105100.00%1100.00%
Total105100.00%1100.00%


static ssize_t store_linear(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct lm3533_bl *bl = dev_get_drvdata(dev); unsigned long linear; u8 mask; u8 val; int ret; if (kstrtoul(buf, 0, &linear)) return -EINVAL; mask = 1 << (2 * lm3533_bl_get_ctrlbank_id(bl) + 1); if (linear) val = mask; else val = 0; ret = lm3533_update(bl->lm3533, LM3533_REG_CTRLBANK_AB_BCONF, val, mask); if (ret) return ret; return len; }

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Johan Hovold116100.00%1100.00%
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static ssize_t show_pwm(struct device *dev, struct device_attribute *attr, char *buf) { struct lm3533_bl *bl = dev_get_drvdata(dev); u8 val; int ret; ret = lm3533_ctrlbank_get_pwm(&bl->cb, &val); if (ret) return ret; return scnprintf(buf, PAGE_SIZE, "%u\n", val); }

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Johan Hovold68100.00%1100.00%
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static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct lm3533_bl *bl = dev_get_drvdata(dev); u8 val; int ret; if (kstrtou8(buf, 0, &val)) return -EINVAL; ret = lm3533_ctrlbank_set_pwm(&bl->cb, val); if (ret) return ret; return len; }

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Johan Hovold78100.00%1100.00%
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static LM3533_ATTR_RO(als_channel); static LM3533_ATTR_RW(als_en); static LM3533_ATTR_RO(id); static LM3533_ATTR_RW(linear); static LM3533_ATTR_RW(pwm); static struct attribute *lm3533_bl_attributes[] = { &dev_attr_als_channel.attr, &dev_attr_als_en.attr, &dev_attr_id.attr, &dev_attr_linear.attr, &dev_attr_pwm.attr, NULL, };
static umode_t lm3533_bl_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { struct device *dev = container_of(kobj, struct device, kobj); struct lm3533_bl *bl = dev_get_drvdata(dev); umode_t mode = attr->mode; if (attr == &dev_attr_als_channel.attr || attr == &dev_attr_als_en.attr) { if (!bl->lm3533->have_als) mode = 0; } return mode; }

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Johan Hovold85100.00%1100.00%
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; static struct attribute_group lm3533_bl_attribute_group = { .is_visible = lm3533_bl_attr_is_visible, .attrs = lm3533_bl_attributes };
static int lm3533_bl_setup(struct lm3533_bl *bl, struct lm3533_bl_platform_data *pdata) { int ret; ret = lm3533_ctrlbank_set_max_current(&bl->cb, pdata->max_current); if (ret) return ret; return lm3533_ctrlbank_set_pwm(&bl->cb, pdata->pwm); }

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Johan Hovold53100.00%1100.00%
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static int lm3533_bl_probe(struct platform_device *pdev) { struct lm3533 *lm3533; struct lm3533_bl_platform_data *pdata; struct lm3533_bl *bl; struct backlight_device *bd; struct backlight_properties props; int ret; dev_dbg(&pdev->dev, "%s\n", __func__); lm3533 = dev_get_drvdata(pdev->dev.parent); if (!lm3533) return -EINVAL; pdata = dev_get_platdata(&pdev->dev); if (!pdata) { dev_err(&pdev->dev, "no platform data\n"); return -EINVAL; } if (pdev->id < 0 || pdev->id >= LM3533_HVCTRLBANK_COUNT) { dev_err(&pdev->dev, "illegal backlight id %d\n", pdev->id); return -EINVAL; } bl = devm_kzalloc(&pdev->dev, sizeof(*bl), GFP_KERNEL); if (!bl) return -ENOMEM; bl->lm3533 = lm3533; bl->id = pdev->id; bl->cb.lm3533 = lm3533; bl->cb.id = lm3533_bl_get_ctrlbank_id(bl); bl->cb.dev = NULL; /* until registered */ memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.max_brightness = LM3533_BL_MAX_BRIGHTNESS; props.brightness = pdata->default_brightness; bd = devm_backlight_device_register(&pdev->dev, pdata->name, pdev->dev.parent, bl, &lm3533_bl_ops, &props); if (IS_ERR(bd)) { dev_err(&pdev->dev, "failed to register backlight device\n"); return PTR_ERR(bd); } bl->bd = bd; bl->cb.dev = &bl->bd->dev; platform_set_drvdata(pdev, bl); ret = sysfs_create_group(&bd->dev.kobj, &lm3533_bl_attribute_group); if (ret < 0) { dev_err(&pdev->dev, "failed to create sysfs attributes\n"); return ret; } backlight_update_status(bd); ret = lm3533_bl_setup(bl, pdata); if (ret) goto err_sysfs_remove; ret = lm3533_ctrlbank_enable(&bl->cb); if (ret) goto err_sysfs_remove; return 0; err_sysfs_remove: sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); return ret; }

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Johan Hovold39094.89%125.00%
Jingoo Han215.11%375.00%
Total411100.00%4100.00%


static int lm3533_bl_remove(struct platform_device *pdev) { struct lm3533_bl *bl = platform_get_drvdata(pdev); struct backlight_device *bd = bl->bd; dev_dbg(&bd->dev, "%s\n", __func__); bd->props.power = FB_BLANK_POWERDOWN; bd->props.brightness = 0; lm3533_ctrlbank_disable(&bl->cb); sysfs_remove_group(&bd->dev.kobj, &lm3533_bl_attribute_group); return 0; }

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Johan Hovold82100.00%1100.00%
Total82100.00%1100.00%

#ifdef CONFIG_PM_SLEEP
static int lm3533_bl_suspend(struct device *dev) { struct lm3533_bl *bl = dev_get_drvdata(dev); dev_dbg(dev, "%s\n", __func__); return lm3533_ctrlbank_disable(&bl->cb); }

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Johan Hovold3589.74%150.00%
Jingoo Han410.26%150.00%
Total39100.00%2100.00%


static int lm3533_bl_resume(struct device *dev) { struct lm3533_bl *bl = dev_get_drvdata(dev); dev_dbg(dev, "%s\n", __func__); return lm3533_ctrlbank_enable(&bl->cb); }

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Johan Hovold3589.74%150.00%
Jingoo Han410.26%150.00%
Total39100.00%2100.00%

#endif static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);
static void lm3533_bl_shutdown(struct platform_device *pdev) { struct lm3533_bl *bl = platform_get_drvdata(pdev); dev_dbg(&pdev->dev, "%s\n", __func__); lm3533_ctrlbank_disable(&bl->cb); }

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Johan Hovold41100.00%1100.00%
Total41100.00%1100.00%

static struct platform_driver lm3533_bl_driver = { .driver = { .name = "lm3533-backlight", .pm = &lm3533_bl_pm_ops, }, .probe = lm3533_bl_probe, .remove = lm3533_bl_remove, .shutdown = lm3533_bl_shutdown, }; module_platform_driver(lm3533_bl_driver); MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); MODULE_DESCRIPTION("LM3533 Backlight driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:lm3533-backlight");

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Johan Hovold175997.56%120.00%
Jingoo Han442.44%480.00%
Total1803100.00%5100.00%
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