arch/arm/mach-ux500/board-u5500.c

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   5  * License terms: GNU General Public License (GPL) version 2
   6  */
   7
   8 #include <linux/init.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/amba/bus.h>
  11 #include <linux/gpio.h>
  12 #include <linux/irq.h>
  13 #include <linux/i2c.h>
  14
  15 #include <asm/mach/arch.h>
  16 #include <asm/mach-types.h>
  17
  18 #include <plat/pincfg.h>
  19 #include <plat/i2c.h>
  20
  21 #include <mach/hardware.h>
  22 #include <mach/devices.h>
  23 #include <mach/setup.h>
  24
  25 #include "pins-db5500.h"
  26 #include "devices-db5500.h"
  27 #include <linux/led-lm3530.h>
  28
  29 /*
  30  * GPIO
  31  */
  32
  33 static pin_cfg_t u5500_pins[] = {
  34         /* I2C */
  35         GPIO218_I2C2_SCL        | PIN_INPUT_PULLUP,
  36         GPIO219_I2C2_SDA        | PIN_INPUT_PULLUP,
  37
  38         /* DISPLAY_ENABLE */
  39         GPIO226_GPIO        | PIN_OUTPUT_LOW,
  40
  41         /* Backlight Enbale */
  42         GPIO224_GPIO        | PIN_OUTPUT_HIGH,
  43 };
  44 /*
  45  * I2C
  46  */
  47
  48 #define U5500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
  49 static struct nmk_i2c_controller u5500_i2c##id##_data = { \
  50         /*                              \
  51          * slave data setup time, which is      \
  52          * 250 ns,100ns,10ns which is 14,6,2    \
  53          * respectively for a 48 Mhz    \
  54          * i2c clock                    \
  55          */                             \
  56         .slsu           = _slsu,        \
  57         /* Tx FIFO threshold */         \
  58         .tft            = _tft,         \
  59         /* Rx FIFO threshold */         \
  60         .rft            = _rft,         \
  61         /* std. mode operation */       \
  62         .clk_freq       = clk,          \
  63         .sm             = _sm,          \
  64 }
  65 /*
  66  * The board uses TODO <3> i2c controllers, initialize all of
  67  * them with slave data setup time of 250 ns,
  68  * Tx & Rx FIFO threshold values as 1 and standard
  69  * mode of operation
  70  */
  71
  72 U5500_I2C_CONTROLLER(2, 0xe, 1, 1, 400000, I2C_FREQ_MODE_FAST);
  73
  74 static struct lm3530_platform_data u5500_als_platform_data = {
  75         .mode = LM3530_BL_MODE_MANUAL,
  76         .als_input_mode = LM3530_INPUT_ALS1,
  77         .max_current = LM3530_FS_CURR_26mA,
  78         .pwm_pol_hi = true,
  79         .als_avrg_time = LM3530_ALS_AVRG_TIME_512ms,
  80         .brt_ramp_law = 1,      /* Linear */
  81         .brt_ramp_fall = LM3530_RAMP_TIME_8s,
  82         .brt_ramp_rise = LM3530_RAMP_TIME_8s,
  83         .als1_resistor_sel = LM3530_ALS_IMPD_13_53kOhm,
  84         .als2_resistor_sel = LM3530_ALS_IMPD_Z,
  85         .als_vmin = 730,        /* mV */
  86         .als_vmax = 1020,       /* mV */
  87         .brt_val = 0x7F,        /* Max brightness */
  88 };
  89
  90
  91 static struct i2c_board_info __initdata u5500_i2c2_devices[] = {
  92         {
  93                 /* Backlight */
  94                 I2C_BOARD_INFO("lm3530-led", 0x36),
  95                 .platform_data = &u5500_als_platform_data,
  96         },
  97 };
  98
  99 static void __init u5500_i2c_init(void)
 100 {
 101         db5500_add_i2c2(&u5500_i2c2_data);
 102         i2c_register_board_info(2, ARRAY_AND_SIZE(u5500_i2c2_devices));
 103 }
 104 static void __init u5500_uart_init(void)
 105 {
 106         db5500_add_uart0(NULL);
 107         db5500_add_uart1(NULL);
 108         db5500_add_uart2(NULL);
 109 }
 110
 111 static void __init u5500_init_machine(void)
 112 {
 113         u5500_init_devices();
 114         nmk_config_pins(u5500_pins, ARRAY_SIZE(u5500_pins));
 115         u5500_i2c_init();
 116         u5500_sdi_init();
 117         u5500_uart_init();
 118 }
 119
 120 MACHINE_START(U5500, "ST-Ericsson U5500 Platform")
 121         .boot_params    = 0x00000100,
 122         .map_io         = u5500_map_io,
 123         .init_irq       = ux500_init_irq,
 124         .timer          = &ux500_timer,
 125         .init_machine   = u5500_init_machine,
 126 MACHINE_END