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bc5478b275
Add generic TMU support alongwith i2c sensors in dtt command to enable temperature reading in cases where TMU is present along-with/instead-of i2c sensors. Signed-off-by: Akshay Saraswat <akshay.s@samsung.com> Acked-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
/*
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* (C) Copyright 2001
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* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <config.h>
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#include <command.h>
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#include <dtt.h>
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#include <i2c.h>
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#include <tmu.h>
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#if defined CONFIG_DTT_SENSORS
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static unsigned long sensor_initialized;
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static void _initialize_dtt(void)
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{
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int i;
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unsigned char sensors[] = CONFIG_DTT_SENSORS;
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for (i = 0; i < sizeof(sensors); i++) {
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if ((sensor_initialized & (1 << i)) == 0) {
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if (dtt_init_one(sensors[i]) != 0) {
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printf("DTT%d: Failed init!\n", i);
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continue;
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}
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sensor_initialized |= (1 << i);
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}
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}
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}
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void dtt_init(void)
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{
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int old_bus;
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/* switch to correct I2C bus */
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old_bus = I2C_GET_BUS();
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I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
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_initialize_dtt();
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/* switch back to original I2C bus */
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I2C_SET_BUS(old_bus);
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}
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#endif
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int dtt_i2c(void)
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{
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#if defined CONFIG_DTT_SENSORS
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int i;
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unsigned char sensors[] = CONFIG_DTT_SENSORS;
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int old_bus;
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/* Force a compilation error, if there are more then 32 sensors */
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BUILD_BUG_ON(sizeof(sensors) > 32);
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/* switch to correct I2C bus */
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old_bus = I2C_GET_BUS();
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I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
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_initialize_dtt();
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/*
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* Loop through sensors, read
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* temperature, and output it.
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*/
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for (i = 0; i < sizeof(sensors); i++)
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printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
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/* switch back to original I2C bus */
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I2C_SET_BUS(old_bus);
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#endif
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return 0;
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}
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int dtt_tmu(void)
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{
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#if defined CONFIG_TMU_CMD_DTT
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int cur_temp;
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/* Sense and return latest thermal info */
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if (tmu_monitor(&cur_temp) == TMU_STATUS_INIT) {
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puts("TMU is in unknown state, temperature is invalid\n");
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return -1;
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}
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printf("Current temperature: %u degrees Celsius\n", cur_temp);
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#endif
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return 0;
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}
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int do_dtt(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
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{
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int err = 0;
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err |= dtt_i2c();
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err |= dtt_tmu();
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return err;
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} /* do_dtt() */
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/***************************************************/
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U_BOOT_CMD(
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dtt, 1, 1, do_dtt,
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"Read temperature from Digital Thermometer and Thermostat",
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""
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);
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