diff options
Diffstat (limited to 'drivers/video/backlight')
33 files changed, 1004 insertions, 264 deletions
diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c index a1376dc73d71..f49181c73113 100644 --- a/drivers/video/backlight/88pm860x_bl.c +++ b/drivers/video/backlight/88pm860x_bl.c @@ -67,6 +67,28 @@ static inline int wled_idc(int port) return ret; } +static int backlight_power_set(struct pm860x_chip *chip, int port, + int on) +{ + int ret = -EINVAL; + + switch (port) { + case PM8606_BACKLIGHT1: + ret = on ? pm8606_osc_enable(chip, WLED1_DUTY) : + pm8606_osc_disable(chip, WLED1_DUTY); + break; + case PM8606_BACKLIGHT2: + ret = on ? pm8606_osc_enable(chip, WLED2_DUTY) : + pm8606_osc_disable(chip, WLED2_DUTY); + break; + case PM8606_BACKLIGHT3: + ret = on ? pm8606_osc_enable(chip, WLED3_DUTY) : + pm8606_osc_disable(chip, WLED3_DUTY); + break; + } + return ret; +} + static int pm860x_backlight_set(struct backlight_device *bl, int brightness) { struct pm860x_backlight_data *data = bl_get_data(bl); @@ -79,6 +101,9 @@ static int pm860x_backlight_set(struct backlight_device *bl, int brightness) else value = brightness; + if (brightness) + backlight_power_set(chip, data->port, 1); + ret = pm860x_reg_write(data->i2c, wled_a(data->port), value); if (ret < 0) goto out; @@ -115,6 +140,9 @@ static int pm860x_backlight_set(struct backlight_device *bl, int brightness) if (ret < 0) goto out; + if (brightness == 0) + backlight_power_set(chip, data->port, 0); + dev_dbg(chip->dev, "set brightness %d\n", value); data->current_brightness = value; return 0; @@ -170,7 +198,6 @@ static int pm860x_backlight_probe(struct platform_device *pdev) struct backlight_device *bl; struct resource *res; struct backlight_properties props; - unsigned char value; char name[MFD_NAME_SIZE]; int ret; @@ -187,7 +214,8 @@ static int pm860x_backlight_probe(struct platform_device *pdev) return -EINVAL; } - data = kzalloc(sizeof(struct pm860x_backlight_data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_backlight_data), + GFP_KERNEL); if (data == NULL) return -ENOMEM; strncpy(name, res->name, MFD_NAME_SIZE); @@ -200,7 +228,6 @@ static int pm860x_backlight_probe(struct platform_device *pdev) data->port = pdata->flags; if (data->port < 0) { dev_err(&pdev->dev, "wrong platform data is assigned"); - kfree(data); return -EINVAL; } @@ -211,33 +238,12 @@ static int pm860x_backlight_probe(struct platform_device *pdev) &pm860x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } bl->props.brightness = MAX_BRIGHTNESS; platform_set_drvdata(pdev, bl); - /* Enable reference VSYS */ - ret = pm860x_reg_read(data->i2c, PM8606_VSYS); - if (ret < 0) - goto out; - if ((ret & PM8606_VSYS_EN) == 0) { - value = ret | PM8606_VSYS_EN; - ret = pm860x_reg_write(data->i2c, PM8606_VSYS, value); - if (ret < 0) - goto out; - } - /* Enable reference OSC */ - ret = pm860x_reg_read(data->i2c, PM8606_MISC); - if (ret < 0) - goto out; - if ((ret & PM8606_MISC_OSC_EN) == 0) { - value = ret | PM8606_MISC_OSC_EN; - ret = pm860x_reg_write(data->i2c, PM8606_MISC, value); - if (ret < 0) - goto out; - } /* read current backlight */ ret = pm860x_backlight_get_brightness(bl); if (ret < 0) @@ -247,17 +253,14 @@ static int pm860x_backlight_probe(struct platform_device *pdev) return 0; out: backlight_device_unregister(bl); - kfree(data); return ret; } static int pm860x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct pm860x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index 681b36929fe4..af16884491ed 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -245,6 +245,12 @@ config BACKLIGHT_DA903X If you have a LCD backlight connected to the WLED output of DA9030 or DA9034 WLED output, say Y here to enable this driver. +config BACKLIGHT_DA9052 + tristate "Dialog DA9052/DA9053 WLED" + depends on PMIC_DA9052 + help + Enable the Backlight Driver for DA9052-BC and DA9053-AA/Bx PMICs. + config BACKLIGHT_MAX8925 tristate "Backlight driver for MAX8925" depends on MFD_MAX8925 @@ -334,6 +340,27 @@ config BACKLIGHT_AAT2870 If you have a AnalogicTech AAT2870 say Y to enable the backlight driver. +config BACKLIGHT_LP855X + tristate "Backlight driver for TI LP855X" + depends on BACKLIGHT_CLASS_DEVICE && I2C + help + This supports TI LP8550, LP8551, LP8552, LP8553 and LP8556 + backlight driver. + +config BACKLIGHT_OT200 + tristate "Backlight driver for ot200 visualisation device" + depends on BACKLIGHT_CLASS_DEVICE && CS5535_MFGPT && GPIO_CS5535 + help + To compile this driver as a module, choose M here: the module will be + called ot200_bl. + +config BACKLIGHT_PANDORA + tristate "Backlight driver for Pandora console" + depends on TWL4030_CORE + help + If you have a Pandora console, say Y to enable the + backlight driver. + endif # BACKLIGHT_CLASS_DEVICE endif # BACKLIGHT_LCD_SUPPORT diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index af5cf654ec7c..36855ae887d6 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -22,11 +22,14 @@ obj-$(CONFIG_BACKLIGHT_GENERIC) += generic_bl.o obj-$(CONFIG_BACKLIGHT_HP700) += jornada720_bl.o obj-$(CONFIG_BACKLIGHT_HP680) += hp680_bl.o obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o +obj-$(CONFIG_BACKLIGHT_LP855X) += lp855x_bl.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o +obj-$(CONFIG_BACKLIGHT_PANDORA) += pandora_bl.o obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o obj-$(CONFIG_BACKLIGHT_DA903X) += da903x_bl.o +obj-$(CONFIG_BACKLIGHT_DA9052) += da9052_bl.o obj-$(CONFIG_BACKLIGHT_MAX8925) += max8925_bl.o obj-$(CONFIG_BACKLIGHT_APPLE) += apple_bl.o obj-$(CONFIG_BACKLIGHT_TOSA) += tosa_bl.o @@ -38,4 +41,4 @@ obj-$(CONFIG_BACKLIGHT_ADP8870) += adp8870_bl.o obj-$(CONFIG_BACKLIGHT_88PM860X) += 88pm860x_bl.o obj-$(CONFIG_BACKLIGHT_PCF50633) += pcf50633-backlight.o obj-$(CONFIG_BACKLIGHT_AAT2870) += aat2870_bl.o - +obj-$(CONFIG_BACKLIGHT_OT200) += ot200_bl.o diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c index 331f1ef1dad5..7ff752288b92 100644 --- a/drivers/video/backlight/aat2870_bl.c +++ b/drivers/video/backlight/aat2870_bl.c @@ -145,7 +145,9 @@ static int aat2870_bl_probe(struct platform_device *pdev) goto out; } - aat2870_bl = kzalloc(sizeof(struct aat2870_bl_driver_data), GFP_KERNEL); + aat2870_bl = devm_kzalloc(&pdev->dev, + sizeof(struct aat2870_bl_driver_data), + GFP_KERNEL); if (!aat2870_bl) { dev_err(&pdev->dev, "Failed to allocate memory for aat2870 backlight\n"); @@ -162,7 +164,7 @@ static int aat2870_bl_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Failed allocate memory for backlight device\n"); ret = PTR_ERR(bd); - goto out_kfree; + goto out; } aat2870_bl->pdev = pdev; @@ -199,8 +201,6 @@ static int aat2870_bl_probe(struct platform_device *pdev) out_bl_dev_unregister: backlight_device_unregister(bd); -out_kfree: - kfree(aat2870_bl); out: return ret; } @@ -215,7 +215,6 @@ static int aat2870_bl_remove(struct platform_device *pdev) backlight_update_status(bd); backlight_device_unregister(bd); - kfree(aat2870_bl); return 0; } diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c index 2e630bf1164c..4911ea7989c8 100644 --- a/drivers/video/backlight/adp5520_bl.c +++ b/drivers/video/backlight/adp5520_bl.c @@ -289,7 +289,7 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) struct adp5520_bl *data; int ret = 0; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -298,7 +298,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) if (data->pdata == NULL) { dev_err(&pdev->dev, "missing platform data\n"); - kfree(data); return -ENODEV; } @@ -314,7 +313,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) &adp5520_bl_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -326,7 +324,6 @@ static int __devinit adp5520_bl_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "failed to register sysfs\n"); backlight_device_unregister(bl); - kfree(data); } platform_set_drvdata(pdev, bl); @@ -348,7 +345,6 @@ static int __devexit adp5520_bl_remove(struct platform_device *pdev) &adp5520_bl_attr_group); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c index 378276c9d3cf..550dbf0bb896 100644 --- a/drivers/video/backlight/adp8860_bl.c +++ b/drivers/video/backlight/adp8860_bl.c @@ -819,17 +819,7 @@ static struct i2c_driver adp8860_driver = { .id_table = adp8860_id, }; -static int __init adp8860_init(void) -{ - return i2c_add_driver(&adp8860_driver); -} -module_init(adp8860_init); - -static void __exit adp8860_exit(void) -{ - i2c_del_driver(&adp8860_driver); -} -module_exit(adp8860_exit); +module_i2c_driver(adp8860_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c index 6735059376d6..9be58c6f18f1 100644 --- a/drivers/video/backlight/adp8870_bl.c +++ b/drivers/video/backlight/adp8870_bl.c @@ -991,17 +991,7 @@ static struct i2c_driver adp8870_driver = { .id_table = adp8870_id, }; -static int __init adp8870_init(void) -{ - return i2c_add_driver(&adp8870_driver); -} -module_init(adp8870_init); - -static void __exit adp8870_exit(void) -{ - i2c_del_driver(&adp8870_driver); -} -module_exit(adp8870_exit); +module_i2c_driver(adp8870_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c index 7838a23fbdd1..7bdadc790117 100644 --- a/drivers/video/backlight/ams369fg06.c +++ b/drivers/video/backlight/ams369fg06.c @@ -629,18 +629,7 @@ static struct spi_driver ams369fg06_driver = { .resume = ams369fg06_resume, }; -static int __init ams369fg06_init(void) -{ - return spi_register_driver(&ams369fg06_driver); -} - -static void __exit ams369fg06_exit(void) -{ - spi_unregister_driver(&ams369fg06_driver); -} - -module_init(ams369fg06_init); -module_exit(ams369fg06_exit); +module_spi_driver(ams369fg06_driver); MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); MODULE_DESCRIPTION("ams369fg06 LCD Driver"); diff --git a/drivers/video/backlight/apple_bl.c b/drivers/video/backlight/apple_bl.c index be98d152b7fd..a523b255e124 100644 --- a/drivers/video/backlight/apple_bl.c +++ b/drivers/video/backlight/apple_bl.c @@ -24,6 +24,7 @@ #include <linux/io.h> #include <linux/pci.h> #include <linux/acpi.h> +#include <linux/atomic.h> static struct backlight_device *apple_backlight_device; @@ -221,14 +222,32 @@ static struct acpi_driver apple_bl_driver = { }, }; +static atomic_t apple_bl_registered = ATOMIC_INIT(0); + +int apple_bl_register(void) +{ + if (atomic_xchg(&apple_bl_registered, 1) == 0) + return acpi_bus_register_driver(&apple_bl_driver); + + return 0; +} +EXPORT_SYMBOL_GPL(apple_bl_register); + +void apple_bl_unregister(void) +{ + if (atomic_xchg(&apple_bl_registered, 0) == 1) + acpi_bus_unregister_driver(&apple_bl_driver); +} +EXPORT_SYMBOL_GPL(apple_bl_unregister); + static int __init apple_bl_init(void) { - return acpi_bus_register_driver(&apple_bl_driver); + return apple_bl_register(); } static void __exit apple_bl_exit(void) { - acpi_bus_unregister_driver(&apple_bl_driver); + apple_bl_unregister(); } module_init(apple_bl_init); diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index c6533bad26f8..6dab13fe562e 100644 --- a/drivers/video/backlight/corgi_lcd.c +++ b/drivers/video/backlight/corgi_lcd.c @@ -629,17 +629,7 @@ static struct spi_driver corgi_lcd_driver = { .resume = corgi_lcd_resume, }; -static int __init corgi_lcd_init(void) -{ - return spi_register_driver(&corgi_lcd_driver); -} -module_init(corgi_lcd_init); - -static void __exit corgi_lcd_exit(void) -{ - spi_unregister_driver(&corgi_lcd_driver); -} -module_exit(corgi_lcd_exit); +module_spi_driver(corgi_lcd_driver); MODULE_DESCRIPTION("LCD and backlight driver for SHARP C7x0/Cxx00"); MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c index 6c8c54041fae..22489eb5f3e0 100644 --- a/drivers/video/backlight/cr_bllcd.c +++ b/drivers/video/backlight/cr_bllcd.c @@ -212,7 +212,7 @@ static int cr_backlight_probe(struct platform_device *pdev) &gpio_bar); gpio_bar &= ~0x3F; - crp = kzalloc(sizeof(*crp), GFP_KERNEL); + crp = devm_kzalloc(&pdev->dev, sizeof(*crp), GFP_KERNEL); if (!crp) { lcd_device_unregister(ldp); backlight_device_unregister(bdp); @@ -243,7 +243,6 @@ static int cr_backlight_remove(struct platform_device *pdev) backlight_device_unregister(crp->cr_backlight_device); lcd_device_unregister(crp->cr_lcd_device); pci_dev_put(lpc_dev); - kfree(crp); return 0; } diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c index abb4a06268f1..30e19681a30b 100644 --- a/drivers/video/backlight/da903x_bl.c +++ b/drivers/video/backlight/da903x_bl.c @@ -110,7 +110,7 @@ static int da903x_backlight_probe(struct platform_device *pdev) struct backlight_properties props; int max_brightness; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -124,7 +124,6 @@ static int da903x_backlight_probe(struct platform_device *pdev) default: dev_err(&pdev->dev, "invalid backlight device ID(%d)\n", pdev->id); - kfree(data); return -EINVAL; } @@ -143,7 +142,6 @@ static int da903x_backlight_probe(struct platform_device *pdev) &da903x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -157,10 +155,8 @@ static int da903x_backlight_probe(struct platform_device *pdev) static int da903x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct da903x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c new file mode 100644 index 000000000000..b628d68f5162 --- /dev/null +++ b/drivers/video/backlight/da9052_bl.c @@ -0,0 +1,187 @@ +/* + * Backlight Driver for Dialog DA9052 PMICs + * + * Copyright(c) 2012 Dialog Semiconductor Ltd. + * + * Author: David Dajun Chen <dchen@diasemi.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/backlight.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <linux/mfd/da9052/da9052.h> +#include <linux/mfd/da9052/reg.h> + +#define DA9052_MAX_BRIGHTNESS 0xFF + +enum { + DA9052_WLEDS_OFF, + DA9052_WLEDS_ON, +}; + +enum { + DA9052_TYPE_WLED1, + DA9052_TYPE_WLED2, + DA9052_TYPE_WLED3, +}; + +static unsigned char wled_bank[] = { + DA9052_LED1_CONF_REG, + DA9052_LED2_CONF_REG, + DA9052_LED3_CONF_REG, +}; + +struct da9052_bl { + struct da9052 *da9052; + uint brightness; + uint state; + uint led_reg; +}; + +static int da9052_adjust_wled_brightness(struct da9052_bl *wleds) +{ + unsigned char boost_en; + unsigned char i_sink; + int ret; + + boost_en = 0x3F; + i_sink = 0xFF; + if (wleds->state == DA9052_WLEDS_OFF) { + boost_en = 0x00; + i_sink = 0x00; + } + + ret = da9052_reg_write(wleds->da9052, DA9052_BOOST_REG, boost_en); + if (ret < 0) + return ret; + + ret = da9052_reg_write(wleds->da9052, DA9052_LED_CONT_REG, i_sink); + if (ret < 0) + return ret; + + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], 0x0); + if (ret < 0) + return ret; + + msleep(10); + + if (wleds->brightness) { + ret = da9052_reg_write(wleds->da9052, wled_bank[wleds->led_reg], + wleds->brightness); + if (ret < 0) + return ret; + } + + return 0; +} + +static int da9052_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = brightness; + wleds->state = DA9052_WLEDS_ON; + + return da9052_adjust_wled_brightness(wleds); +} + +static int da9052_backlight_get_brightness(struct backlight_device *bl) +{ + struct da9052_bl *wleds = bl_get_data(bl); + + return wleds->brightness; +} + +static const struct backlight_ops da9052_backlight_ops = { + .update_status = da9052_backlight_update_status, + .get_brightness = da9052_backlight_get_brightness, +}; + +static int da9052_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct backlight_properties props; + struct da9052_bl *wleds; + + wleds = devm_kzalloc(&pdev->dev, sizeof(struct da9052_bl), GFP_KERNEL); + if (!wleds) + return -ENOMEM; + + wleds->da9052 = dev_get_drvdata(pdev->dev.parent); + wleds->brightness = 0; + wleds->led_reg = platform_get_device_id(pdev)->driver_data; + wleds->state = DA9052_WLEDS_OFF; + + props.type = BACKLIGHT_RAW; + props.max_brightness = DA9052_MAX_BRIGHTNESS; + + bl = backlight_device_register(pdev->name, wleds->da9052->dev, wleds, + &da9052_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "Failed to register backlight\n"); + devm_kfree(&pdev->dev, wleds); + return PTR_ERR(bl); + } + + bl->props.max_brightness = DA9052_MAX_BRIGHTNESS; + bl->props.brightness = 0; + platform_set_drvdata(pdev, bl); + + return da9052_adjust_wled_brightness(wleds); +} + +static int da9052_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct da9052_bl *wleds = bl_get_data(bl); + + wleds->brightness = 0; + wleds->state = DA9052_WLEDS_OFF; + da9052_adjust_wled_brightness(wleds); + backlight_device_unregister(bl); + devm_kfree(&pdev->dev, wleds); + + return 0; +} + +static struct platform_device_id da9052_wled_ids[] = { + { + .name = "da9052-wled1", + .driver_data = DA9052_TYPE_WLED1, + }, + { + .name = "da9052-wled2", + .driver_data = DA9052_TYPE_WLED2, + }, + { + .name = "da9052-wled3", + .driver_data = DA9052_TYPE_WLED3, + }, +}; + +static struct platform_driver da9052_wled_driver = { + .probe = da9052_backlight_probe, + .remove = da9052_backlight_remove, + .id_table = da9052_wled_ids, + .driver = { + .name = "da9052-wled", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(da9052_wled_driver); + +MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>"); +MODULE_DESCRIPTION("Backlight driver for DA9052 PMIC"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9052-backlight"); diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c index b62b8b9063b5..08214e1f0958 100644 --- a/drivers/video/backlight/ep93xx_bl.c +++ b/drivers/video/backlight/ep93xx_bl.c @@ -17,11 +17,6 @@ #include <linux/fb.h> #include <linux/backlight.h> -#include <mach/hardware.h> - -#define EP93XX_RASTER_REG(x) (EP93XX_RASTER_BASE + (x)) -#define EP93XX_RASTER_BRIGHTNESS EP93XX_RASTER_REG(0x20) - #define EP93XX_MAX_COUNT 255 #define EP93XX_MAX_BRIGHT 255 #define EP93XX_DEF_BRIGHT 128 @@ -35,7 +30,7 @@ static int ep93xxbl_set(struct backlight_device *bl, int brightness) { struct ep93xxbl *ep93xxbl = bl_get_data(bl); - __raw_writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio); + writel((brightness << 8) | EP93XX_MAX_COUNT, ep93xxbl->mmio); ep93xxbl->brightness = brightness; @@ -70,21 +65,29 @@ static int __init ep93xxbl_probe(struct platform_device *dev) struct ep93xxbl *ep93xxbl; struct backlight_device *bl; struct backlight_properties props; + struct resource *res; ep93xxbl = devm_kzalloc(&dev->dev, sizeof(*ep93xxbl), GFP_KERNEL); if (!ep93xxbl) return -ENOMEM; + res = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!res) + return -ENXIO; + /* - * This register is located in the range already ioremap'ed by - * the framebuffer driver. A MFD driver seems a bit of overkill - * to handle this so use the static I/O mapping; this address - * is already virtual. + * FIXME - We don't do a request_mem_region here because we are + * sharing the register space with the framebuffer driver (see + * drivers/video/ep93xx-fb.c) and doing so will cause the second + * loaded driver to return -EBUSY. * * NOTE: No locking is required; the framebuffer does not touch * this register. */ - ep93xxbl->mmio = EP93XX_RASTER_BRIGHTNESS; + ep93xxbl->mmio = devm_ioremap(&dev->dev, res->start, + resource_size(res)); + if (!ep93xxbl->mmio) + return -ENXIO; memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index 27d1d7a29c77..6022b67285ec 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -274,18 +274,7 @@ static struct spi_driver l4f00242t03_driver = { .shutdown = l4f00242t03_shutdown, }; -static __init int l4f00242t03_init(void) -{ - return spi_register_driver(&l4f00242t03_driver); -} - -static __exit void l4f00242t03_exit(void) -{ - spi_unregister_driver(&l4f00242t03_driver); -} - -module_init(l4f00242t03_init); -module_exit(l4f00242t03_exit); +module_spi_driver(l4f00242t03_driver); MODULE_AUTHOR("Alberto Panizzo <maramaopercheseimorto@gmail.com>"); MODULE_DESCRIPTION("EPSON L4F00242T03 LCD"); diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c index 78dafc0c8fc5..efd352be21ae 100644 --- a/drivers/video/backlight/ld9040.c +++ b/drivers/video/backlight/ld9040.c @@ -856,18 +856,7 @@ static struct spi_driver ld9040_driver = { .resume = ld9040_resume, }; -static int __init ld9040_init(void) -{ - return spi_register_driver(&ld9040_driver); -} - -static void __exit ld9040_exit(void) -{ - spi_unregister_driver(&ld9040_driver); -} - -module_init(ld9040_init); -module_exit(ld9040_exit); +module_spi_driver(ld9040_driver); MODULE_AUTHOR("Donghwa Lee <dh09.lee@samsung.com>"); MODULE_DESCRIPTION("ld9040 LCD Driver"); diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c index 4ec78cfe26ea..4161f9e3982a 100644 --- a/drivers/video/backlight/lms283gf05.c +++ b/drivers/video/backlight/lms283gf05.c @@ -226,18 +226,7 @@ static struct spi_driver lms283gf05_driver = { .remove = __devexit_p(lms283gf05_remove), }; -static __init int lms283gf05_init(void) -{ - return spi_register_driver(&lms283gf05_driver); -} - -static __exit void lms283gf05_exit(void) -{ - spi_unregister_driver(&lms283gf05_driver); -} - -module_init(lms283gf05_init); -module_exit(lms283gf05_exit); +module_spi_driver(lms283gf05_driver); MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>"); MODULE_DESCRIPTION("LCD283GF05 LCD"); diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c index be20b5cbe26c..3a6d5419e3e3 100644 --- a/drivers/video/backlight/locomolcd.c +++ b/drivers/video/backlight/locomolcd.c @@ -229,14 +229,7 @@ static struct locomo_driver poodle_lcd_driver = { static int __init locomolcd_init(void) { - int ret = locomo_driver_register(&poodle_lcd_driver); - if (ret) - return ret; - -#ifdef CONFIG_SA1100_COLLIE - sa1100fb_lcd_power = locomolcd_power; -#endif - return 0; + return locomo_driver_register(&poodle_lcd_driver); } static void __exit locomolcd_exit(void) diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c new file mode 100644 index 000000000000..72a0e0c917cf --- /dev/null +++ b/drivers/video/backlight/lp855x_bl.c @@ -0,0 +1,331 @@ +/* + * TI LP855x Backlight Driver + * + * Copyright (C) 2011 Texas Instruments + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/lp855x.h> + +/* Registers */ +#define BRIGHTNESS_CTRL (0x00) +#define DEVICE_CTRL (0x01) + +#define BUF_SIZE 20 +#define DEFAULT_BL_NAME "lcd-backlight" +#define MAX_BRIGHTNESS 255 + +struct lp855x { + const char *chipname; + enum lp855x_chip_id chip_id; + struct i2c_client *client; + struct backlight_device *bl; + struct device *dev; + struct mutex xfer_lock; + struct lp855x_platform_data *pdata; +}; + +static int lp855x_read_byte(struct lp855x *lp, u8 reg, u8 *data) +{ + int ret; + + mutex_lock(&lp->xfer_lock); + ret = i2c_smbus_read_byte_data(lp->client, reg); + if (ret < 0) { + mutex_unlock(&lp->xfer_lock); + dev_err(lp->dev, "failed to read 0x%.2x\n", reg); + return ret; + } + mutex_unlock(&lp->xfer_lock); + + *data = (u8)ret; + return 0; +} + +static int lp855x_write_byte(struct lp855x *lp, u8 reg, u8 data) +{ + int ret; + + mutex_lock(&lp->xfer_lock); + ret = i2c_smbus_write_byte_data(lp->client, reg, data); + mutex_unlock(&lp->xfer_lock); + + return ret; +} + +static bool lp855x_is_valid_rom_area(struct lp855x *lp, u8 addr) +{ + u8 start, end; + + switch (lp->chip_id) { + case LP8550: + case LP8551: + case LP8552: + case LP8553: + start = EEPROM_START; + end = EEPROM_END; + break; + case LP8556: + start = EPROM_START; + end = EPROM_END; + break; + default: + return false; + } + + return (addr >= start && addr <= end); +} + +static int lp855x_init_registers(struct lp855x *lp) +{ + u8 val, addr; + int i, ret; + struct lp855x_platform_data *pd = lp->pdata; + + val = pd->initial_brightness; + ret = lp855x_write_byte(lp, BRIGHTNESS_CTRL, val); + if (ret) + return ret; + + val = pd->device_control; + ret = lp855x_write_byte(lp, DEVICE_CTRL, val); + if (ret) + return ret; + + if (pd->load_new_rom_data && pd->size_program) { + for (i = 0; i < pd->size_program; i++) { + addr = pd->rom_data[i].addr; + val = pd->rom_data[i].val; + if (!lp855x_is_valid_rom_area(lp, addr)) + continue; + + ret = lp855x_write_byte(lp, addr, val); + if (ret) + return ret; + } + } + + return ret; +} + +static int lp855x_bl_update_status(struct backlight_device *bl) +{ + struct lp855x *lp = bl_get_data(bl); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + + if (bl->props.state & BL_CORE_SUSPENDED) + bl->props.brightness = 0; + + if (mode == PWM_BASED) { + struct lp855x_pwm_data *pd = &lp->pdata->pwm_data; + int br = bl->props.brightness; + int max_br = bl->props.max_brightness; + + if (pd->pwm_set_intensity) + pd->pwm_set_intensity(br, max_br); + + } else if (mode == REGISTER_BASED) { + u8 val = bl->props.brightness; + lp855x_write_byte(lp, BRIGHTNESS_CTRL, val); + } + + return 0; +} + +static int lp855x_bl_get_brightness(struct backlight_device *bl) +{ + struct lp855x *lp = bl_get_data(bl); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + + if (mode == PWM_BASED) { + struct lp855x_pwm_data *pd = &lp->pdata->pwm_data; + int max_br = bl->props.max_brightness; + + if (pd->pwm_get_intensity) + bl->props.brightness = pd->pwm_get_intensity(max_br); + + } else if (mode == REGISTER_BASED) { + u8 val = 0; + + lp855x_read_byte(lp, BRIGHTNESS_CTRL, &val); + bl->props.brightness = val; + } + + return bl->props.brightness; +} + +static const struct backlight_ops lp855x_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = lp855x_bl_update_status, + .get_brightness = lp855x_bl_get_brightness, +}; + +static int lp855x_backlight_register(struct lp855x *lp) +{ + struct backlight_device *bl; + struct backlight_properties props; + struct lp855x_platform_data *pdata = lp->pdata; + char *name = pdata->name ? : DEFAULT_BL_NAME; + + props.type = BACKLIGHT_PLATFORM; + props.max_brightness = MAX_BRIGHTNESS; + + if (pdata->initial_brightness > props.max_brightness) + pdata->initial_brightness = props.max_brightness; + + props.brightness = pdata->initial_brightness; + + bl = backlight_device_register(name, lp->dev, lp, + &lp855x_bl_ops, &props); + if (IS_ERR(bl)) + return PTR_ERR(bl); + + lp->bl = bl; + + return 0; +} + +static void lp855x_backlight_unregister(struct lp855x *lp) +{ + if (lp->bl) + backlight_device_unregister(lp->bl); +} + +static ssize_t lp855x_get_chip_id(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + return scnprintf(buf, BUF_SIZE, "%s\n", lp->chipname); +} + +static ssize_t lp855x_get_bl_ctl_mode(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lp855x *lp = dev_get_drvdata(dev); + enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode; + char *strmode = NULL; + + if (mode == PWM_BASED) + strmode = "pwm based"; + else if (mode == REGISTER_BASED) + strmode = "register based"; + + return scnprintf(buf, BUF_SIZE, "%s\n", strmode); +} + +static DEVICE_ATTR(chip_id, S_IRUGO, lp855x_get_chip_id, NULL); +static DEVICE_ATTR(bl_ctl_mode, S_IRUGO, lp855x_get_bl_ctl_mode, NULL); + +static struct attribute *lp855x_attributes[] = { + &dev_attr_chip_id.attr, + &dev_attr_bl_ctl_mode.attr, + NULL, +}; + +static const struct attribute_group lp855x_attr_group = { + .attrs = lp855x_attributes, +}; + +static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id) +{ + struct lp855x *lp; + struct lp855x_platform_data *pdata = cl->dev.platform_data; + enum lp855x_brightness_ctrl_mode mode; + int ret; + + if (!pdata) { + dev_err(&cl->dev, "no platform data supplied\n"); + return -EINVAL; + } + + if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) + return -EIO; + + lp = devm_kzalloc(&cl->dev, sizeof(struct lp855x), GFP_KERNEL); + if (!lp) + return -ENOMEM; + + mode = pdata->mode; + lp->client = cl; + lp->dev = &cl->dev; + lp->pdata = pdata; + lp->chipname = id->name; + lp->chip_id = id->driver_data; + i2c_set_clientdata(cl, lp); + + mutex_init(&lp->xfer_lock); + + ret = lp855x_init_registers(lp); + if (ret) { + dev_err(lp->dev, "i2c communication err: %d", ret); + if (mode == REGISTER_BASED) + goto err_dev; + } + + ret = lp855x_backlight_register(lp); + if (ret) { + dev_err(lp->dev, + "failed to register backlight. err: %d\n", ret); + goto err_dev; + } + + ret = sysfs_create_group(&lp->dev->kobj, &lp855x_attr_group); + if (ret) { + dev_err(lp->dev, "failed to register sysfs. err: %d\n", ret); + goto err_sysfs; + } + + backlight_update_status(lp->bl); + return 0; + +err_sysfs: + lp855x_backlight_unregister(lp); +err_dev: + return ret; +} + +static int __devexit lp855x_remove(struct i2c_client *cl) +{ + struct lp855x *lp = i2c_get_clientdata(cl); + + lp->bl->props.brightness = 0; + backlight_update_status(lp->bl); + sysfs_remove_group(&lp->dev->kobj, &lp855x_attr_group); + lp855x_backlight_unregister(lp); + + return 0; +} + +static const struct i2c_device_id lp855x_ids[] = { + {"lp8550", LP8550}, + {"lp8551", LP8551}, + {"lp8552", LP8552}, + {"lp8553", LP8553}, + {"lp8556", LP8556}, + { } +}; +MODULE_DEVICE_TABLE(i2c, lp855x_ids); + +static struct i2c_driver lp855x_driver = { + .driver = { + .name = "lp855x", + }, + .probe = lp855x_probe, + .remove = __devexit_p(lp855x_remove), + .id_table = lp855x_ids, +}; + +module_i2c_driver(lp855x_driver); + +MODULE_DESCRIPTION("Texas Instruments LP855x Backlight driver"); +MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/backlight/ltv350qv.c b/drivers/video/backlight/ltv350qv.c index cca43c06d3c8..333949ff3265 100644 --- a/drivers/video/backlight/ltv350qv.c +++ b/drivers/video/backlight/ltv350qv.c @@ -321,17 +321,7 @@ static struct spi_driver ltv350qv_driver = { .resume = ltv350qv_resume, }; -static int __init ltv350qv_init(void) -{ - return spi_register_driver(<v350qv_driver); -} - -static void __exit ltv350qv_exit(void) -{ - spi_unregister_driver(<v350qv_driver); -} -module_init(ltv350qv_init); -module_exit(ltv350qv_exit); +module_spi_driver(ltv350qv_driver); MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); MODULE_DESCRIPTION("Samsung LTV350QV LCD Driver"); diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c index c915e3b53886..e833ac72e063 100644 --- a/drivers/video/backlight/max8925_bl.c +++ b/drivers/video/backlight/max8925_bl.c @@ -129,7 +129,8 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) return -EINVAL; } - data = kzalloc(sizeof(struct max8925_backlight_data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(struct max8925_backlight_data), + GFP_KERNEL); if (data == NULL) return -ENOMEM; strncpy(name, res->name, MAX8925_NAME_SIZE); @@ -143,7 +144,6 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) &max8925_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } bl->props.brightness = MAX_BRIGHTNESS; @@ -165,17 +165,14 @@ static int __devinit max8925_backlight_probe(struct platform_device *pdev) return 0; out: backlight_device_unregister(bl); - kfree(data); return ret; } static int __devexit max8925_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct max8925_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c index d8cde277ec83..0175bfb08a1c 100644 --- a/drivers/video/backlight/omap1_bl.c +++ b/drivers/video/backlight/omap1_bl.c @@ -141,7 +141,8 @@ static int omapbl_probe(struct platform_device *pdev) if (!pdata) return -ENXIO; - bl = kzalloc(sizeof(struct omap_backlight), GFP_KERNEL); + bl = devm_kzalloc(&pdev->dev, sizeof(struct omap_backlight), + GFP_KERNEL); if (unlikely(!bl)) return -ENOMEM; @@ -150,10 +151,8 @@ static int omapbl_probe(struct platform_device *pdev) props.max_brightness = OMAPBL_MAX_INTENSITY; dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops, &props); - if (IS_ERR(dev)) { - kfree(bl); + if (IS_ERR(dev)) return PTR_ERR(dev); - } bl->powermode = FB_BLANK_POWERDOWN; bl->current_intensity = 0; @@ -177,10 +176,8 @@ static int omapbl_probe(struct platform_device *pdev) static int omapbl_remove(struct platform_device *pdev) { struct backlight_device *dev = platform_get_drvdata(pdev); - struct omap_backlight *bl = dev_get_drvdata(&dev->dev); backlight_device_unregister(dev); - kfree(bl); return 0; } diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c new file mode 100644 index 000000000000..f519d55a294c --- /dev/null +++ b/drivers/video/backlight/ot200_bl.c @@ -0,0 +1,175 @@ +/* + * Copyright (C) 2012 Bachmann electronic GmbH + * Christian Gmeiner <christian.gmeiner@gmail.com> + * + * Backlight driver for ot200 visualisation device from + * Bachmann electronic GmbH. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/gpio.h> +#include <linux/cs5535.h> + +static struct cs5535_mfgpt_timer *pwm_timer; + +/* this array defines the mapping of brightness in % to pwm frequency */ +static const u8 dim_table[101] = {0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, + 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 8, 8, 9, 9, + 10, 10, 11, 11, 12, 12, 13, 14, 15, 15, 16, + 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 28, + 30, 31, 33, 35, 37, 39, 41, 43, 45, 47, 50, + 53, 55, 58, 61, 65, 68, 72, 75, 79, 84, 88, + 93, 97, 103, 108, 114, 120, 126, 133, 140, + 147, 155, 163}; + +struct ot200_backlight_data { + int current_brightness; +}; + +#define GPIO_DIMM 27 +#define SCALE 1 +#define CMP1MODE 0x2 /* compare on GE; output high on compare + * greater than or equal */ +#define PWM_SETUP (SCALE | CMP1MODE << 6 | MFGPT_SETUP_CNTEN) +#define MAX_COMP2 163 + +static int ot200_backlight_update_status(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + int brightness = bl->props.brightness; + + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + + /* enable or disable PWM timer */ + if (brightness == 0) + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, 0); + else if (data->current_brightness == 0) { + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, + MFGPT_SETUP_CNTEN); + } + + /* apply new brightness value */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[brightness]); + data->current_brightness = brightness; + + return 0; +} + +static int ot200_backlight_get_brightness(struct backlight_device *bl) +{ + struct ot200_backlight_data *data = bl_get_data(bl); + return data->current_brightness; +} + +static const struct backlight_ops ot200_backlight_ops = { + .update_status = ot200_backlight_update_status, + .get_brightness = ot200_backlight_get_brightness, +}; + +static int ot200_backlight_probe(struct platform_device *pdev) +{ + struct backlight_device *bl; + struct ot200_backlight_data *data; + struct backlight_properties props; + int retval = 0; + + /* request gpio */ + if (gpio_request(GPIO_DIMM, "ot200 backlight dimmer") < 0) { + dev_err(&pdev->dev, "failed to request GPIO %d\n", GPIO_DIMM); + return -ENODEV; + } + + /* request timer */ + pwm_timer = cs5535_mfgpt_alloc_timer(7, MFGPT_DOMAIN_ANY); + if (!pwm_timer) { + dev_err(&pdev->dev, "MFGPT 7 not available\n"); + retval = -ENODEV; + goto error_mfgpt_alloc; + } + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) { + retval = -ENOMEM; + goto error_kzalloc; + } + + /* setup gpio */ + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_ENABLE); + cs5535_gpio_set(GPIO_DIMM, GPIO_OUTPUT_AUX1); + + /* setup timer */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP2, MAX_COMP2); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, PWM_SETUP); + + data->current_brightness = 100; + props.max_brightness = 100; + props.brightness = 100; + props.type = BACKLIGHT_RAW; + + bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, data, + &ot200_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + retval = PTR_ERR(bl); + goto error_backlight_device_register; + } + + platform_set_drvdata(pdev, bl); + + return 0; + +error_backlight_device_register: + kfree(data); +error_kzalloc: + cs5535_mfgpt_free_timer(pwm_timer); +error_mfgpt_alloc: + gpio_free(GPIO_DIMM); + return retval; +} + +static int ot200_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct ot200_backlight_data *data = bl_get_data(bl); + + backlight_device_unregister(bl); + + /* on module unload set brightness to 100% */ + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_COUNTER, 0); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_SETUP, MFGPT_SETUP_CNTEN); + cs5535_mfgpt_write(pwm_timer, MFGPT_REG_CMP1, + MAX_COMP2 - dim_table[100]); + + cs5535_mfgpt_free_timer(pwm_timer); + gpio_free(GPIO_DIMM); + + kfree(data); + return 0; +} + +static struct platform_driver ot200_backlight_driver = { + .driver = { + .name = "ot200-backlight", + .owner = THIS_MODULE, + }, + .probe = ot200_backlight_probe, + .remove = ot200_backlight_remove, +}; + +module_platform_driver(ot200_backlight_driver); + +MODULE_DESCRIPTION("backlight driver for ot200 visualisation device"); +MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:ot200-backlight"); diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c new file mode 100644 index 000000000000..4ec30748b447 --- /dev/null +++ b/drivers/video/backlight/pandora_bl.c @@ -0,0 +1,171 @@ +/* + * Backlight driver for Pandora handheld. + * Pandora uses TWL4030 PWM0 -> TPS61161 combo for control backlight. + * Based on pwm_bl.c + * + * Copyright 2009,2012 Gražvydas Ignotas <notasas@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/i2c/twl.h> +#include <linux/err.h> + +#define TWL_PWM0_ON 0x00 +#define TWL_PWM0_OFF 0x01 + +#define TWL_INTBR_GPBR1 0x0c +#define TWL_INTBR_PMBR1 0x0d + +#define TWL_PMBR1_PWM0_MUXMASK 0x0c +#define TWL_PMBR1_PWM0 0x04 +#define PWM0_CLK_ENABLE BIT(0) +#define PWM0_ENABLE BIT(2) + +/* range accepted by hardware */ +#define MIN_VALUE 9 +#define MAX_VALUE 63 +#define MAX_USER_VALUE (MAX_VALUE - MIN_VALUE) + +#define PANDORABL_WAS_OFF BL_CORE_DRIVER1 + +static int pandora_backlight_update_status(struct backlight_device *bl) +{ + int brightness = bl->props.brightness; + u8 r; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_FBBLANK) + brightness = 0; + if (bl->props.state & BL_CORE_SUSPENDED) + brightness = 0; + + if ((unsigned int)brightness > MAX_USER_VALUE) + brightness = MAX_USER_VALUE; + + if (brightness == 0) { + if (bl->props.state & PANDORABL_WAS_OFF) + goto done; + + /* first disable PWM0 output, then clock */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r &= ~PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + goto done; + } + + if (bl->props.state & PANDORABL_WAS_OFF) { + /* + * set PWM duty cycle to max. TPS61161 seems to use this + * to calibrate it's PWM sensitivity when it starts. + */ + twl_i2c_write_u8(TWL4030_MODULE_PWM0, MAX_VALUE, + TWL_PWM0_OFF); + + /* first enable clock, then PWM0 out */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_GPBR1); + r &= ~PWM0_ENABLE; + r |= PWM0_CLK_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + r |= PWM0_ENABLE; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_GPBR1); + + /* + * TI made it very easy to enable digital control, so easy that + * it often triggers unintentionally and disabes PWM control, + * so wait until 1 wire mode detection window ends. + */ + usleep_range(2000, 10000); + } + + twl_i2c_write_u8(TWL4030_MODULE_PWM0, MIN_VALUE + brightness, + TWL_PWM0_OFF); + +done: + if (brightness != 0) + bl->props.state &= ~PANDORABL_WAS_OFF; + else + bl->props.state |= PANDORABL_WAS_OFF; + + return 0; +} + +static int pandora_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static const struct backlight_ops pandora_backlight_ops = { + .options = BL_CORE_SUSPENDRESUME, + .update_status = pandora_backlight_update_status, + .get_brightness = pandora_backlight_get_brightness, +}; + +static int pandora_backlight_probe(struct platform_device *pdev) +{ + struct backlight_properties props; + struct backlight_device *bl; + u8 r; + + memset(&props, 0, sizeof(props)); + props.max_brightness = MAX_USER_VALUE; + props.type = BACKLIGHT_RAW; + bl = backlight_device_register(pdev->name, &pdev->dev, + NULL, &pandora_backlight_ops, &props); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + return PTR_ERR(bl); + } + + platform_set_drvdata(pdev, bl); + + /* 64 cycle period, ON position 0 */ + twl_i2c_write_u8(TWL4030_MODULE_PWM0, 0x80, TWL_PWM0_ON); + + bl->props.state |= PANDORABL_WAS_OFF; + bl->props.brightness = MAX_USER_VALUE; + backlight_update_status(bl); + + /* enable PWM function in pin mux */ + twl_i2c_read_u8(TWL4030_MODULE_INTBR, &r, TWL_INTBR_PMBR1); + r &= ~TWL_PMBR1_PWM0_MUXMASK; + r |= TWL_PMBR1_PWM0; + twl_i2c_write_u8(TWL4030_MODULE_INTBR, r, TWL_INTBR_PMBR1); + + return 0; +} + +static int pandora_backlight_remove(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + backlight_device_unregister(bl); + return 0; +} + +static struct platform_driver pandora_backlight_driver = { + .driver = { + .name = "pandora-backlight", + .owner = THIS_MODULE, + }, + .probe = pandora_backlight_probe, + .remove = pandora_backlight_remove, +}; + +module_platform_driver(pandora_backlight_driver); + +MODULE_AUTHOR("Gražvydas Ignotas <notasas@gmail.com>"); +MODULE_DESCRIPTION("Pandora Backlight Driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pandora-backlight"); diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c index 13e88b71daec..c65853cb9740 100644 --- a/drivers/video/backlight/pcf50633-backlight.c +++ b/drivers/video/backlight/pcf50633-backlight.c @@ -101,14 +101,13 @@ static const struct backlight_ops pcf50633_bl_ops = { static int __devinit pcf50633_bl_probe(struct platform_device *pdev) { - int ret; struct pcf50633_bl *pcf_bl; struct device *parent = pdev->dev.parent; struct pcf50633_platform_data *pcf50633_data = parent->platform_data; struct pcf50633_bl_platform_data *pdata = pcf50633_data->backlight_data; struct backlight_properties bl_props; - pcf_bl = kzalloc(sizeof(*pcf_bl), GFP_KERNEL); + pcf_bl = devm_kzalloc(&pdev->dev, sizeof(*pcf_bl), GFP_KERNEL); if (!pcf_bl) return -ENOMEM; @@ -129,10 +128,8 @@ static int __devinit pcf50633_bl_probe(struct platform_device *pdev) pcf_bl->bl = backlight_device_register(pdev->name, &pdev->dev, pcf_bl, &pcf50633_bl_ops, &bl_props); - if (IS_ERR(pcf_bl->bl)) { - ret = PTR_ERR(pcf_bl->bl); - goto err_free; - } + if (IS_ERR(pcf_bl->bl)) + return PTR_ERR(pcf_bl->bl); platform_set_drvdata(pdev, pcf_bl); @@ -145,11 +142,6 @@ static int __devinit pcf50633_bl_probe(struct platform_device *pdev) backlight_update_status(pcf_bl->bl); return 0; - -err_free: - kfree(pcf_bl); - - return ret; } static int __devexit pcf50633_bl_remove(struct platform_device *pdev) @@ -160,8 +152,6 @@ static int __devexit pcf50633_bl_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); - kfree(pcf_bl); - return 0; } diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c index f0bf491ed087..b6672340d6c7 100644 --- a/drivers/video/backlight/platform_lcd.c +++ b/drivers/video/backlight/platform_lcd.c @@ -121,9 +121,9 @@ static int __devexit platform_lcd_remove(struct platform_device *pdev) } #ifdef CONFIG_PM -static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) +static int platform_lcd_suspend(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 1; platform_lcd_set_power(plcd->lcd, plcd->power); @@ -131,29 +131,30 @@ static int platform_lcd_suspend(struct platform_device *pdev, pm_message_t st) return 0; } -static int platform_lcd_resume(struct platform_device *pdev) +static int platform_lcd_resume(struct device *dev) { - struct platform_lcd *plcd = platform_get_drvdata(pdev); + struct platform_lcd *plcd = dev_get_drvdata(dev); plcd->suspended = 0; platform_lcd_set_power(plcd->lcd, plcd->power); return 0; } -#else -#define platform_lcd_suspend NULL -#define platform_lcd_resume NULL + +static SIMPLE_DEV_PM_OPS(platform_lcd_pm_ops, platform_lcd_suspend, + platform_lcd_resume); #endif static struct platform_driver platform_lcd_driver = { .driver = { .name = "platform-lcd", .owner = THIS_MODULE, +#ifdef CONFIG_PM + .pm = &platform_lcd_pm_ops, +#endif }, .probe = platform_lcd_probe, .remove = __devexit_p(platform_lcd_remove), - .suspend = platform_lcd_suspend, - .resume = platform_lcd_resume, }; module_platform_driver(platform_lcd_driver); diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 7496d04e1d3c..342b7d7cbb63 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -102,7 +102,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) return ret; } - pb = kzalloc(sizeof(*pb), GFP_KERNEL); + pb = devm_kzalloc(&pdev->dev, sizeof(*pb), GFP_KERNEL); if (!pb) { dev_err(&pdev->dev, "no memory for state\n"); ret = -ENOMEM; @@ -121,7 +121,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) if (IS_ERR(pb->pwm)) { dev_err(&pdev->dev, "unable to request PWM for backlight\n"); ret = PTR_ERR(pb->pwm); - goto err_pwm; + goto err_alloc; } else dev_dbg(&pdev->dev, "got pwm for backlight\n"); @@ -144,8 +144,6 @@ static int pwm_backlight_probe(struct platform_device *pdev) err_bl: pwm_free(pb->pwm); -err_pwm: - kfree(pb); err_alloc: if (data->exit) data->exit(&pdev->dev); @@ -162,7 +160,6 @@ static int pwm_backlight_remove(struct platform_device *pdev) pwm_config(pb->pwm, 0, pb->period); pwm_disable(pb->pwm); pwm_free(pb->pwm); - kfree(pb); if (data->exit) data->exit(&pdev->dev); return 0; diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c index e132157d8545..e264f55b2574 100644 --- a/drivers/video/backlight/s6e63m0.c +++ b/drivers/video/backlight/s6e63m0.c @@ -690,7 +690,7 @@ static ssize_t s6e63m0_sysfs_store_gamma_mode(struct device *dev, struct backlight_device *bd = NULL; int brightness, rc; - rc = strict_strtoul(buf, 0, (unsigned long *)&lcd->gamma_mode); + rc = kstrtouint(buf, 0, &lcd->gamma_mode); if (rc < 0) return rc; @@ -909,18 +909,7 @@ static struct spi_driver s6e63m0_driver = { .resume = s6e63m0_resume, }; -static int __init s6e63m0_init(void) -{ - return spi_register_driver(&s6e63m0_driver); -} - -static void __exit s6e63m0_exit(void) -{ - spi_unregister_driver(&s6e63m0_driver); -} - -module_init(s6e63m0_init); -module_exit(s6e63m0_exit); +module_spi_driver(s6e63m0_driver); MODULE_AUTHOR("InKi Dae <inki.dae@samsung.com>"); MODULE_DESCRIPTION("S6E63M0 LCD Driver"); diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c index 1997e12a1057..2368b8e5f89e 100644 --- a/drivers/video/backlight/tdo24m.c +++ b/drivers/video/backlight/tdo24m.c @@ -459,17 +459,7 @@ static struct spi_driver tdo24m_driver = { .resume = tdo24m_resume, }; -static int __init tdo24m_init(void) -{ - return spi_register_driver(&tdo24m_driver); -} -module_init(tdo24m_init); - -static void __exit tdo24m_exit(void) -{ - spi_unregister_driver(&tdo24m_driver); -} -module_exit(tdo24m_exit); +module_spi_driver(tdo24m_driver); MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); MODULE_DESCRIPTION("Driver for Toppoly TDO24M LCD Panel"); diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c index 425a7365470b..2b241abced43 100644 --- a/drivers/video/backlight/tosa_bl.c +++ b/drivers/video/backlight/tosa_bl.c @@ -181,18 +181,7 @@ static struct i2c_driver tosa_bl_driver = { .id_table = tosa_bl_id, }; -static int __init tosa_bl_init(void) -{ - return i2c_add_driver(&tosa_bl_driver); -} - -static void __exit tosa_bl_exit(void) -{ - i2c_del_driver(&tosa_bl_driver); -} - -module_init(tosa_bl_init); -module_exit(tosa_bl_exit); +module_i2c_driver(tosa_bl_driver); MODULE_AUTHOR("Dmitry Baryshkov"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c index 772f6015219a..2231aec23918 100644 --- a/drivers/video/backlight/tosa_lcd.c +++ b/drivers/video/backlight/tosa_lcd.c @@ -271,7 +271,7 @@ static int tosa_lcd_resume(struct spi_device *spi) } #else #define tosa_lcd_suspend NULL -#define tosa_lcd_reume NULL +#define tosa_lcd_resume NULL #endif static struct spi_driver tosa_lcd_driver = { @@ -285,18 +285,7 @@ static struct spi_driver tosa_lcd_driver = { .resume = tosa_lcd_resume, }; -static int __init tosa_lcd_init(void) -{ - return spi_register_driver(&tosa_lcd_driver); -} - -static void __exit tosa_lcd_exit(void) -{ - spi_unregister_driver(&tosa_lcd_driver); -} - -module_init(tosa_lcd_init); -module_exit(tosa_lcd_exit); +module_spi_driver(tosa_lcd_driver); MODULE_AUTHOR("Dmitry Baryshkov"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/backlight/vgg2432a4.c b/drivers/video/backlight/vgg2432a4.c index b49063c831e7..b617fae9aa26 100644 --- a/drivers/video/backlight/vgg2432a4.c +++ b/drivers/video/backlight/vgg2432a4.c @@ -262,20 +262,7 @@ static struct spi_driver vgg2432a4_driver = { .resume = vgg2432a4_resume, }; -/* Device driver initialisation */ - -static int __init vgg2432a4_init(void) -{ - return spi_register_driver(&vgg2432a4_driver); -} - -static void __exit vgg2432a4_exit(void) -{ - spi_unregister_driver(&vgg2432a4_driver); -} - -module_init(vgg2432a4_init); -module_exit(vgg2432a4_exit); +module_spi_driver(vgg2432a4_driver); MODULE_AUTHOR("Ben Dooks <ben-linux@fluff.org>"); MODULE_DESCRIPTION("VGG2432A4 LCD Driver"); diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c index 4e915f5eca99..5d365deb5f82 100644 --- a/drivers/video/backlight/wm831x_bl.c +++ b/drivers/video/backlight/wm831x_bl.c @@ -186,7 +186,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev) if (ret < 0) return ret; - data = kzalloc(sizeof(*data), GFP_KERNEL); + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (data == NULL) return -ENOMEM; @@ -200,7 +200,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev) &wm831x_backlight_ops, &props); if (IS_ERR(bl)) { dev_err(&pdev->dev, "failed to register backlight\n"); - kfree(data); return PTR_ERR(bl); } @@ -211,7 +210,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev) /* Disable the DCDC if it was started so we can bootstrap */ wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0); - backlight_update_status(bl); return 0; @@ -220,10 +218,8 @@ static int wm831x_backlight_probe(struct platform_device *pdev) static int wm831x_backlight_remove(struct platform_device *pdev) { struct backlight_device *bl = platform_get_drvdata(pdev); - struct wm831x_backlight_data *data = bl_get_data(bl); backlight_device_unregister(bl); - kfree(data); return 0; } |