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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* TI LP5562 driver.
*/
#include "board.h"
#include "console.h"
#include "i2c.h"
#include "lp5562.h"
#include "timer.h"
#include "uart.h"
#include "util.h"
/* 8-bit I2C address */
#define LP5562_I2C_ADDR (0x30 << 1)
inline int lp5562_write(uint8_t reg, uint8_t val)
{
return i2c_write8(I2C_PORT_HOST, LP5562_I2C_ADDR, reg, val);
}
int lp5562_set_color(uint32_t rgb)
{
int ret = 0;
ret |= lp5562_write(LP5562_REG_B_PWM, rgb & 0xff);
ret |= lp5562_write(LP5562_REG_G_PWM, (rgb >> 8) & 0xff);
ret |= lp5562_write(LP5562_REG_R_PWM, (rgb >> 16) & 0xff);
return ret;
}
int lp5562_poweron(void)
{
int ret = 0;
ret |= lp5562_write(LP5562_REG_ENABLE, 0x40);
udelay(500); /* start-up delay */
ret |= lp5562_write(LP5562_REG_CONFIG, 0x1);
ret |= lp5562_write(LP5562_REG_LED_MAP, 0x0);
return ret;
}
int lp5562_poweroff(void)
{
return lp5562_write(LP5562_REG_ENABLE, 0x0);
}
/*****************************************************************************/
/* Console commands */
static int command_lp5562(int argc, char **argv)
{
if (argc == 4) {
char *e;
uint8_t red, green, blue;
red = strtoi(argv[1], &e, 0);
if (e && *e)
return EC_ERROR_PARAM1;
green = strtoi(argv[2], &e, 0);
if (e && *e)
return EC_ERROR_PARAM2;
blue = strtoi(argv[3], &e, 0);
if (e && *e)
return EC_ERROR_PARAM3;
return lp5562_set_color((red << 16) | (green << 8) | blue);
} else if (argc == 2) {
if (!strcasecmp(argv[1], "on"))
return lp5562_poweron();
else if (!strcasecmp(argv[1], "off"))
return lp5562_poweroff();
return EC_ERROR_PARAM1;
}
return EC_ERROR_INVAL;
}
DECLARE_CONSOLE_COMMAND(lp5562, command_lp5562,
"on | off | <red> <green> <blue>",
"Set the color of the LED",
NULL);
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