X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fhwmon%2Flm75.c;h=81198215ff6cdf867df3ffd1ac88a06d6fd6b772;hb=74c076d6c33d6d42ab065541a38383587879e7b7;hp=c34851725ef75095bee305298124c3ecaf5f5eb3;hpb=e44f3ea4e801d37ef293284cb57b9637382f211a;p=oweals%2Fu-boot.git diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c index c34851725e..81198215ff 100644 --- a/drivers/hwmon/lm75.c +++ b/drivers/hwmon/lm75.c @@ -26,179 +26,159 @@ */ #include - -#ifdef CONFIG_DTT_LM75 -#if !defined(CFG_EEPROM_PAGE_WRITE_ENABLE) || \ - (CFG_EEPROM_PAGE_WRITE_BITS < 1) -# error "CFG_EEPROM_PAGE_WRITE_ENABLE must be defined and CFG_EEPROM_PAGE_WRITE_BITS must be greater than 1 to use CONFIG_DTT_LM75" -#endif - #include #include - /* * Device code */ +#if defined(CONFIG_SYS_I2C_DTT_ADDR) +#define DTT_I2C_DEV_CODE CONFIG_SYS_I2C_DTT_ADDR +#else #define DTT_I2C_DEV_CODE 0x48 /* ON Semi's LM75 device */ +#endif +#define DTT_READ_TEMP 0x0 +#define DTT_CONFIG 0x1 +#define DTT_TEMP_HYST 0x2 +#define DTT_TEMP_SET 0x3 int dtt_read(int sensor, int reg) { - int dlen; - uchar data[2]; + int dlen; + uchar data[2]; #ifdef CONFIG_DTT_AD7414 - /* - * On AD7414 the first value upon bootup is not read correctly. - * This is most likely because of the 800ms update time of the - * temp register in normal update mode. To get current values - * each time we issue the "dtt" command including upon powerup - * we switch into one-short mode. - * - * Issue one-shot mode command - */ - dtt_write(sensor, DTT_CONFIG, 0x64); + /* + * On AD7414 the first value upon bootup is not read correctly. + * This is most likely because of the 800ms update time of the + * temp register in normal update mode. To get current values + * each time we issue the "dtt" command including upon powerup + * we switch into one-short mode. + * + * Issue one-shot mode command + */ + dtt_write(sensor, DTT_CONFIG, 0x64); #endif - /* - * Validate 'reg' param - */ - if((reg < 0) || (reg > 3)) - return -1; - - /* - * Calculate sensor address and register. - */ - sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); /* calculate address of lm75 */ - - /* - * Prepare to handle 2 byte result. - */ - if ((reg == DTT_READ_TEMP) || - (reg == DTT_TEMP_HYST) || - (reg == DTT_TEMP_SET)) - dlen = 2; - else - dlen = 1; - - /* - * Now try to read the register. - */ - if (i2c_read(sensor, reg, 1, data, dlen) != 0) - return -1; - - /* - * Handle 2 byte result. - */ - if (dlen == 2) - return ((int)((short)data[1] + (((short)data[0]) << 8))); - - - return (int)data[0]; + /* Validate 'reg' param */ + if((reg < 0) || (reg > 3)) + return -1; + + /* Calculate sensor address and register. */ + sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); + + /* Prepare to handle 2 byte result. */ + if ((reg == DTT_READ_TEMP) || + (reg == DTT_TEMP_HYST) || + (reg == DTT_TEMP_SET)) + dlen = 2; + else + dlen = 1; + + /* Now try to read the register. */ + if (i2c_read(sensor, reg, 1, data, dlen) != 0) + return -1; + + /* Handle 2 byte result. */ + if (dlen == 2) + return ((int)((short)data[1] + (((short)data[0]) << 8))); + + return (int)data[0]; } /* dtt_read() */ int dtt_write(int sensor, int reg, int val) { - int dlen; - uchar data[2]; - - /* - * Validate 'reg' param - */ - if ((reg < 0) || (reg > 3)) - return 1; - - /* - * Calculate sensor address and register. - */ - sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); /* calculate address of lm75 */ - - /* - * Handle 2 byte values. - */ - if ((reg == DTT_READ_TEMP) || - (reg == DTT_TEMP_HYST) || - (reg == DTT_TEMP_SET)) { - dlen = 2; - data[0] = (char)((val >> 8) & 0xff); /* MSB first */ - data[1] = (char)(val & 0xff); - } else { - dlen = 1; - data[0] = (char)(val & 0xff); - } - - /* - * Write value to register. - */ - if (i2c_write(sensor, reg, 1, data, dlen) != 0) - return 1; - - return 0; + int dlen; + uchar data[2]; + + /* Validate 'reg' param */ + if ((reg < 0) || (reg > 3)) + return 1; + + /* Calculate sensor address and register. */ + sensor = DTT_I2C_DEV_CODE + (sensor & 0x07); + + /* Handle 2 byte values. */ + if ((reg == DTT_READ_TEMP) || + (reg == DTT_TEMP_HYST) || + (reg == DTT_TEMP_SET)) { + dlen = 2; + data[0] = (char)((val >> 8) & 0xff); /* MSB first */ + data[1] = (char)(val & 0xff); + } else { + dlen = 1; + data[0] = (char)(val & 0xff); + } + + /* Write value to register. */ + if (i2c_write(sensor, reg, 1, data, dlen) != 0) + return 1; + + return 0; } /* dtt_write() */ static int _dtt_init(int sensor) { - int val; - - /* - * Setup TSET ( trip point ) register - */ - val = ((CFG_DTT_MAX_TEMP * 2) << 7) & 0xff80; /* trip */ - if (dtt_write(sensor, DTT_TEMP_SET, val) != 0) - return 1; - - /* - * Setup THYST ( untrip point ) register - Hysteresis - */ - val = (((CFG_DTT_MAX_TEMP - CFG_DTT_HYSTERESIS) * 2) << 7) & 0xff80; - if (dtt_write(sensor, DTT_TEMP_HYST, val) != 0) - return 1; - - /* - * Setup configuraton register - */ + int val; + + /* Setup TSET ( trip point ) register */ + val = ((CONFIG_SYS_DTT_MAX_TEMP * 2) << 7) & 0xff80; /* trip */ + if (dtt_write(sensor, DTT_TEMP_SET, val) != 0) + return 1; + + /* Setup THYST ( untrip point ) register - Hysteresis */ + val = (((CONFIG_SYS_DTT_MAX_TEMP - CONFIG_SYS_DTT_HYSTERESIS) * 2) << 7) & 0xff80; + if (dtt_write(sensor, DTT_TEMP_HYST, val) != 0) + return 1; + + /* Setup configuraton register */ #ifdef CONFIG_DTT_AD7414 - /* config = alert active low and disabled */ - val = 0x60; + /* config = alert active low and disabled */ + val = 0x60; #else - /* config = 6 sample integration, int mode, active low, and enable */ - val = 0x18; + /* config = 6 sample integration, int mode, active low, and enable */ + val = 0x18; #endif - if (dtt_write(sensor, DTT_CONFIG, val) != 0) - return 1; + if (dtt_write(sensor, DTT_CONFIG, val) != 0) + return 1; - return 0; + return 0; } /* _dtt_init() */ int dtt_init (void) { - int i; - unsigned char sensors[] = CONFIG_DTT_SENSORS; - const char *const header = "DTT: "; + int i; + unsigned char sensors[] = CONFIG_DTT_SENSORS; + const char *const header = "DTT: "; + int old_bus; + + /* switch to correct I2C bus */ + old_bus = I2C_GET_BUS(); + I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM); - for (i = 0; i < sizeof(sensors); i++) { + for (i = 0; i < sizeof(sensors); i++) { if (_dtt_init(sensors[i]) != 0) - printf("%s%d FAILED INIT\n", header, i+1); + printf("%s%d FAILED INIT\n", header, i+1); else - printf("%s%d is %i C\n", header, i+1, - dtt_get_temp(sensors[i])); - } + printf("%s%d is %i C\n", header, i+1, + dtt_get_temp(sensors[i])); + } + /* switch back to original I2C bus */ + I2C_SET_BUS(old_bus); - return (0); + return (0); } /* dtt_init() */ int dtt_get_temp(int sensor) { - int const ret = dtt_read(sensor, DTT_READ_TEMP); + int const ret = dtt_read(sensor, DTT_READ_TEMP); - if (ret < 0) { - printf("DTT temperature read failed.\n"); - return 0; - } - return (int)((int16_t) ret / 256); + if (ret < 0) { + printf("DTT temperature read failed.\n"); + return 0; + } + return (int)((int16_t) ret / 256); } /* dtt_get_temp() */ - -#endif /* CONFIG_DTT_LM75 */