arch/arm/mach-tegra/board-roth-leds.c

   1 /*
   2  * arch/arm/mach-tegra/board-roth-leds.c
   3  *
   4  * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  */
  19
  20 #include <linux/gpio.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/leds.h>
  23 #include <linux/leds_pwm.h>
  24 #include <linux/pwm.h>
  25 #include <mach/gpio-tegra.h>
  26 #include <mach/pinmux.h>
  27 #include <mach/pinmux-t11.h>
  28
  29 #include "gpio-names.h"
  30 #include "devices.h"
  31 #include "board.h"
  32 #include "board-common.h"
  33 #include "board-roth.h"
  34 #include "tegra-board-id.h"
  35
  36 #define LED_ENABLE_GPIO TEGRA_GPIO_PU1
  37
  38 #ifdef CONFIG_LEDS_PWM
  39
  40 static struct led_pwm roth_led_info[] = {
  41         {
  42                 .name                   = "roth-led",
  43                 .default_trigger        = "none",
  44                 .pwm_id                 = 2,
  45                 .active_low             = 0,
  46                 .max_brightness         = 255,
  47                 .pwm_period_ns          = 10000000,
  48         },
  49 };
  50
  51 static struct led_pwm_platform_data roth_leds_pdata = {
  52         .leds           = roth_led_info,
  53         .num_leds       = ARRAY_SIZE(roth_led_info),
  54 };
  55
  56 static struct platform_device roth_leds_pwm_device = {
  57         .name   = "leds_pwm",
  58         .id     = -1,
  59         .dev    = {
  60                 .platform_data = &roth_leds_pdata,
  61         },
  62 };
  63
  64
  65 #else
  66 static struct gpio_led roth_led_info[] = {
  67         {
  68                 .name                   = "roth-led",
  69                 .default_trigger        = "none",
  70                 .gpio                   = TEGRA_GPIO_PQ3,
  71                 .active_low             = 0,
  72                 .retain_state_suspended = 0,
  73                 .default_state          = LEDS_GPIO_DEFSTATE_OFF,
  74         },
  75 };
  76
  77 static struct gpio_led_platform_data roth_leds_pdata = {
  78         .leds           = roth_led_info,
  79         .num_leds       = ARRAY_SIZE(roth_led_info),
  80 };
  81
  82 static struct platform_device roth_leds_gpio_device = {
  83         .name   = "leds-gpio",
  84         .id     = -1,
  85         .dev    = {
  86                 .platform_data = &roth_leds_pdata,
  87         },
  88 };
  89 #endif
  90
  91 /*static struct platform_device *roth_led_device[] = {
  92         &tegra_pwfm2_device,
  93 };*/
  94
  95 int __init roth_led_init(void)
  96 {
  97         int err;
  98 #ifdef CONFIG_LEDS_PWM
  99         platform_device_register(&roth_leds_pwm_device);
 100 #else
 101         platform_device_register(&roth_leds_gpio_device);
 102 #endif
 103         gpio_request(LED_ENABLE_GPIO, "LED Trisate Buffer OE");
 104         gpio_direction_output(LED_ENABLE_GPIO, 1);
 105         gpio_export(LED_ENABLE_GPIO, false);
 106         return 0;
 107 }