diff options
Diffstat (limited to 'drivers/video/backlight/tosa_bl.c')
| -rw-r--r-- | drivers/video/backlight/tosa_bl.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c deleted file mode 100644 index 77b71f6c19b5..000000000000 --- a/drivers/video/backlight/tosa_bl.c +++ /dev/null @@ -1,172 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * LCD / Backlight control code for Sharp SL-6000x (tosa) - * - * Copyright (c) 2005 Dirk Opfer - * Copyright (c) 2007,2008 Dmitry Baryshkov - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/spi/spi.h> -#include <linux/i2c.h> -#include <linux/gpio/consumer.h> -#include <linux/fb.h> -#include <linux/backlight.h> -#include <linux/slab.h> - -#include <asm/mach/sharpsl_param.h> - -#include "tosa_bl.h" - -#define COMADJ_DEFAULT 97 - -#define DAC_CH1 0 -#define DAC_CH2 1 - -struct tosa_bl_data { - struct i2c_client *i2c; - struct backlight_device *bl; - struct gpio_desc *gpio; - - int comadj; -}; - -static void tosa_bl_set_backlight(struct tosa_bl_data *data, int brightness) -{ - struct spi_device *spi = dev_get_platdata(&data->i2c->dev); - - i2c_smbus_write_byte_data(data->i2c, DAC_CH1, data->comadj); - - /* SetBacklightDuty */ - i2c_smbus_write_byte_data(data->i2c, DAC_CH2, (u8)(brightness & 0xff)); - - /* SetBacklightVR */ - gpiod_set_value(data->gpio, brightness & 0x100); - - tosa_bl_enable(spi, brightness); -} - -static int tosa_bl_update_status(struct backlight_device *dev) -{ - struct backlight_properties *props = &dev->props; - struct tosa_bl_data *data = bl_get_data(dev); - int power = max(props->power, props->fb_blank); - int brightness = props->brightness; - - if (power) - brightness = 0; - - tosa_bl_set_backlight(data, brightness); - - return 0; -} - -static int tosa_bl_get_brightness(struct backlight_device *dev) -{ - struct backlight_properties *props = &dev->props; - - return props->brightness; -} - -static const struct backlight_ops bl_ops = { - .get_brightness = tosa_bl_get_brightness, - .update_status = tosa_bl_update_status, -}; - -static int tosa_bl_probe(struct i2c_client *client) -{ - struct backlight_properties props; - struct tosa_bl_data *data; - int ret = 0; - - data = devm_kzalloc(&client->dev, sizeof(struct tosa_bl_data), - GFP_KERNEL); - if (!data) - return -ENOMEM; - - data->comadj = sharpsl_param.comadj == -1 ? COMADJ_DEFAULT : sharpsl_param.comadj; - data->gpio = devm_gpiod_get(&client->dev, "backlight", GPIOD_OUT_LOW); - ret = PTR_ERR_OR_ZERO(data->gpio); - if (ret) { - dev_dbg(&data->bl->dev, "Unable to request gpio!\n"); - return ret; - } - - i2c_set_clientdata(client, data); - data->i2c = client; - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = 512 - 1; - data->bl = devm_backlight_device_register(&client->dev, "tosa-bl", - &client->dev, data, &bl_ops, - &props); - if (IS_ERR(data->bl)) { - ret = PTR_ERR(data->bl); - goto err_reg; - } - - data->bl->props.brightness = 69; - data->bl->props.power = FB_BLANK_UNBLANK; - - backlight_update_status(data->bl); - - return 0; - -err_reg: - data->bl = NULL; - return ret; -} - -static void tosa_bl_remove(struct i2c_client *client) -{ - struct tosa_bl_data *data = i2c_get_clientdata(client); - - data->bl = NULL; -} - -#ifdef CONFIG_PM_SLEEP -static int tosa_bl_suspend(struct device *dev) -{ - struct tosa_bl_data *data = dev_get_drvdata(dev); - - tosa_bl_set_backlight(data, 0); - - return 0; -} - -static int tosa_bl_resume(struct device *dev) -{ - struct tosa_bl_data *data = dev_get_drvdata(dev); - - backlight_update_status(data->bl); - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(tosa_bl_pm_ops, tosa_bl_suspend, tosa_bl_resume); - -static const struct i2c_device_id tosa_bl_id[] = { - { "tosa-bl", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(i2c, tosa_bl_id); - -static struct i2c_driver tosa_bl_driver = { - .driver = { - .name = "tosa-bl", - .pm = &tosa_bl_pm_ops, - }, - .probe_new = tosa_bl_probe, - .remove = tosa_bl_remove, - .id_table = tosa_bl_id, -}; - -module_i2c_driver(tosa_bl_driver); - -MODULE_AUTHOR("Dmitry Baryshkov"); -MODULE_LICENSE("GPL v2"); -MODULE_DESCRIPTION("LCD/Backlight control for Sharp SL-6000 PDA"); - |