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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-01 12:10:20 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-01 12:10:20 -0700 |
commit | c5fc249862af862df027030188cc083e072ecd19 (patch) | |
tree | 1205eaa47b07fc06b79e8c742a15dca5bcb1066c /arch/arm/mach-s3c64xx/dev-backlight.c | |
parent | 00e3fcc221f6fe6a890bf3e0e71c6b9944e58233 (diff) | |
parent | 97a2482d9891f0ad6a3710e0b6ae9949c140c7f1 (diff) | |
download | linux-stable-c5fc249862af862df027030188cc083e072ecd19.tar.gz linux-stable-c5fc249862af862df027030188cc083e072ecd19.tar.bz2 linux-stable-c5fc249862af862df027030188cc083e072ecd19.zip |
Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"A large cleanup branch this release, with a healthy 10k negative line
delta.
Most of this is removal of legacy (non-DT) support of shmobile
platforms. There is also removal of two non-DT platforms on OMAP, and
the plat-samsung directory is cleaned out by moving most of the
previously shared-location-but-not-actually-shared files from there to
the appropriate mach directories instead.
There are other sets of changes in here as well:
- Rob Herring removed use of set_irq_flags under all platforms and
moved to genirq alternatives
- a series of timer API conversions to set-state interface
- ep93xx, nomadik and ux500 cleanups from Linus Walleij
- __init annotation fixes from Nicolas Pitre
+ a bunch of other changes that all add up to a nice set of cleanups"
* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (108 commits)
ARM/fb: ep93xx: switch framebuffer to use modedb only
ARM: gemini: Setup timer3 as free running timer
ARM: gemini: Use timer1 for clockevent
ARM: gemini: Add missing register definitions for gemini timer
ARM: ep93xx/timer: Migrate to new 'set-state' interface
ARM: nomadik: push accelerometer down to boards
ARM: nomadik: move l2x0 setup to device tree
ARM: nomadik: selectively enable UART0 on boards
ARM: nomadik: move hog code to use DT hogs
ARM: shmobile: Fix mismerges
ARM: ux500: simplify secondary CPU boot
ARM: SAMSUNG: remove keypad-core header in plat-samsung
ARM: SAMSUNG: local watchdog-reset header in mach-s3c64xx
ARM: SAMSUNG: local onenand-core header in mach-s3c64xx
ARM: SAMSUNG: local irq-uart header in mach-s3c64xx
ARM: SAMSUNG: local backlight header in mach-s3c64xx
ARM: SAMSUNG: local ata-core header in mach-s3c64xx
ARM: SAMSUNG: local regs-usb-hsotg-phy header in mach-s3c64xx
ARM: SAMSUNG: local spi-core header in mach-s3c24xx
ARM: SAMSUNG: local nand-core header in mach-s3c24xx
...
Diffstat (limited to 'arch/arm/mach-s3c64xx/dev-backlight.c')
-rw-r--r-- | arch/arm/mach-s3c64xx/dev-backlight.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c64xx/dev-backlight.c b/arch/arm/mach-s3c64xx/dev-backlight.c new file mode 100644 index 000000000000..38c323e68e3f --- /dev/null +++ b/arch/arm/mach-s3c64xx/dev-backlight.c @@ -0,0 +1,152 @@ +/* + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Common infrastructure for PWM Backlight for Samsung boards + * + * 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/gpio.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/pwm_backlight.h> + +#include <plat/devs.h> +#include <plat/gpio-cfg.h> + +#include "backlight.h" + +struct samsung_bl_drvdata { + struct platform_pwm_backlight_data plat_data; + struct samsung_bl_gpio_info *gpio_info; +}; + +static int samsung_bl_init(struct device *dev) +{ + int ret = 0; + struct platform_pwm_backlight_data *pdata = dev->platform_data; + struct samsung_bl_drvdata *drvdata = container_of(pdata, + struct samsung_bl_drvdata, plat_data); + struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info; + + ret = gpio_request(bl_gpio_info->no, "Backlight"); + if (ret) { + printk(KERN_ERR "failed to request GPIO for LCD Backlight\n"); + return ret; + } + + /* Configure GPIO pin with specific GPIO function for PWM timer */ + s3c_gpio_cfgpin(bl_gpio_info->no, bl_gpio_info->func); + + return 0; +} + +static void samsung_bl_exit(struct device *dev) +{ + struct platform_pwm_backlight_data *pdata = dev->platform_data; + struct samsung_bl_drvdata *drvdata = container_of(pdata, + struct samsung_bl_drvdata, plat_data); + struct samsung_bl_gpio_info *bl_gpio_info = drvdata->gpio_info; + + s3c_gpio_cfgpin(bl_gpio_info->no, S3C_GPIO_OUTPUT); + gpio_free(bl_gpio_info->no); +} + +/* Initialize few important fields of platform_pwm_backlight_data + * structure with default values. These fields can be overridden by + * board-specific values sent from machine file. + * For ease of operation, these fields are initialized with values + * used by most samsung boards. + * Users has the option of sending info about other parameters + * for their specific boards + */ + +static struct samsung_bl_drvdata samsung_dfl_bl_data __initdata = { + .plat_data = { + .max_brightness = 255, + .dft_brightness = 255, + .pwm_period_ns = 78770, + .enable_gpio = -1, + .init = samsung_bl_init, + .exit = samsung_bl_exit, + }, +}; + +static struct platform_device samsung_dfl_bl_device __initdata = { + .name = "pwm-backlight", +}; + +/* samsung_bl_set - Set board specific data (if any) provided by user for + * PWM Backlight control and register specific PWM and backlight device. + * @gpio_info: structure containing GPIO info for PWM timer + * @bl_data: structure containing Backlight control data + */ +void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info, + struct platform_pwm_backlight_data *bl_data) +{ + int ret = 0; + struct platform_device *samsung_bl_device; + struct samsung_bl_drvdata *samsung_bl_drvdata; + struct platform_pwm_backlight_data *samsung_bl_data; + + samsung_bl_device = kmemdup(&samsung_dfl_bl_device, + sizeof(struct platform_device), GFP_KERNEL); + if (!samsung_bl_device) { + printk(KERN_ERR "%s: no memory for platform dev\n", __func__); + return; + } + + samsung_bl_drvdata = kmemdup(&samsung_dfl_bl_data, + sizeof(samsung_dfl_bl_data), GFP_KERNEL); + if (!samsung_bl_drvdata) { + printk(KERN_ERR "%s: no memory for platform dev\n", __func__); + goto err_data; + } + samsung_bl_device->dev.platform_data = &samsung_bl_drvdata->plat_data; + samsung_bl_drvdata->gpio_info = gpio_info; + samsung_bl_data = &samsung_bl_drvdata->plat_data; + + /* Copy board specific data provided by user */ + samsung_bl_data->pwm_id = bl_data->pwm_id; + samsung_bl_device->dev.parent = &samsung_device_pwm.dev; + + if (bl_data->max_brightness) + samsung_bl_data->max_brightness = bl_data->max_brightness; + if (bl_data->dft_brightness) + samsung_bl_data->dft_brightness = bl_data->dft_brightness; + if (bl_data->lth_brightness) + samsung_bl_data->lth_brightness = bl_data->lth_brightness; + if (bl_data->pwm_period_ns) + samsung_bl_data->pwm_period_ns = bl_data->pwm_period_ns; + if (bl_data->enable_gpio >= 0) + samsung_bl_data->enable_gpio = bl_data->enable_gpio; + if (bl_data->init) + samsung_bl_data->init = bl_data->init; + if (bl_data->notify) + samsung_bl_data->notify = bl_data->notify; + if (bl_data->notify_after) + samsung_bl_data->notify_after = bl_data->notify_after; + if (bl_data->exit) + samsung_bl_data->exit = bl_data->exit; + if (bl_data->check_fb) + samsung_bl_data->check_fb = bl_data->check_fb; + + /* Register the Backlight dev */ + ret = platform_device_register(samsung_bl_device); + if (ret) { + printk(KERN_ERR "failed to register backlight device: %d\n", ret); + goto err_plat_reg2; + } + + return; + +err_plat_reg2: + kfree(samsung_bl_data); +err_data: + kfree(samsung_bl_device); + return; +} |