From 5f7b77cbd4599b6a90d18981d9883a3e20e689fb Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Thu, 28 Oct 2010 20:31:48 +0200 Subject: [PATCH] hwmon: (w83795) Don't pre-read values we'll update later There is no point in reading registers during initialization if we will refresh the values in the update function later. This is only slowing down the driver loading with no benefit, stop doing it. This change saves 480 ms on driver load on my test system. Signed-off-by: Jean Delvare --- drivers/hwmon/w83795.c | 33 +++++++-------------------------- 1 file changed, 7 insertions(+), 26 deletions(-) diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c index 07e8de58dcd4..a1d884bb58ad 100644 --- a/drivers/hwmon/w83795.c +++ b/drivers/hwmon/w83795.c @@ -1903,7 +1903,7 @@ static int w83795_probe(struct i2c_client *client, } } - /* First update the voltages measured value and limits */ + /* Read the voltage limits */ for (i = 0; i < ARRAY_SIZE(data->in); i++) { if (!(data->has_in & (1 << i))) continue; @@ -1911,9 +1911,6 @@ static int w83795_probe(struct i2c_client *client, w83795_read(client, W83795_REG_IN[i][IN_MAX]); data->in[i][IN_LOW] = w83795_read(client, W83795_REG_IN[i][IN_LOW]); - tmp = w83795_read(client, W83795_REG_IN[i][IN_READ]) << 2; - tmp |= w83795_read(client, W83795_REG_VRLSB) >> 6; - data->in[i][IN_READ] = tmp; } for (i = 0; i < ARRAY_SIZE(data->in_lsb); i++) { if ((i == 2 && data->chip_type == w83795adg) || @@ -1926,7 +1923,7 @@ static int w83795_probe(struct i2c_client *client, } data->has_gain = w83795_read(client, W83795_REG_VMIGB_CTRL) & 0x0f; - /* First update fan and limits */ + /* Read the fan limits */ for (i = 0; i < ARRAY_SIZE(data->fan); i++) { /* Each register contains LSB for 2 fans, but we want to * read it only once to save time */ @@ -1939,11 +1936,9 @@ static int w83795_probe(struct i2c_client *client, w83795_read(client, W83795_REG_FAN_MIN_HL(i)) << 4; data->fan_min[i] |= (tmp >> W83795_REG_FAN_MIN_LSB_SHIFT(i)) & 0x0F; - data->fan[i] = w83795_read(client, W83795_REG_FAN(i)) << 4; - data->fan[i] |= w83795_read(client, W83795_REG_VRLSB) >> 4; } - /* temperature and limits */ + /* Read the temperature limits */ for (i = 0; i < ARRAY_SIZE(data->temp); i++) { if (!(data->has_temp & (1 << i))) continue; @@ -1955,13 +1950,9 @@ static int w83795_probe(struct i2c_client *client, w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN]); data->temp[i][TEMP_WARN_HYST] = w83795_read(client, W83795_REG_TEMP[i][TEMP_WARN_HYST]); - data->temp[i][TEMP_READ] = - w83795_read(client, W83795_REG_TEMP[i][TEMP_READ]); - data->temp_read_vrlsb[i] = - w83795_read(client, W83795_REG_VRLSB); } - /* dts temperature and limits */ + /* Read the DTS limits */ if (data->enable_dts != 0) { data->dts_ext[DTS_CRIT] = w83795_read(client, W83795_REG_DTS_EXT(DTS_CRIT)); @@ -1971,13 +1962,6 @@ static int w83795_probe(struct i2c_client *client, w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN)); data->dts_ext[DTS_WARN_HYST] = w83795_read(client, W83795_REG_DTS_EXT(DTS_WARN_HYST)); - for (i = 0; i < ARRAY_SIZE(data->dts); i++) { - if (!(data->has_dts & (1 << i))) - continue; - data->dts[i] = w83795_read(client, W83795_REG_DTS(i)); - data->dts_read_vrlsb[i] = - w83795_read(client, W83795_REG_VRLSB); - } } /* First update temp source selction */ @@ -1995,10 +1979,9 @@ static int w83795_probe(struct i2c_client *client, data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i)); data->pwm_fomc = w83795_read(client, W83795_REG_FOMC); for (i = 0; i < data->has_pwm; i++) { - for (tmp = 0; tmp < 5; tmp++) { + for (tmp = PWM_START; tmp <= PWM_FREQ; tmp++) data->pwm[i][tmp] = w83795_read(client, W83795_REG_PWM(i, tmp)); - } } for (i = 0; i < 8; i++) { data->target_speed[i] = @@ -2033,11 +2016,9 @@ static int w83795_probe(struct i2c_client *client, w83795_read(client, W83795_REG_SETUP_PWM(i)); } - /* alarm and beep */ - for (i = 0; i < ARRAY_SIZE(data->alarms); i++) { - data->alarms[i] = w83795_read(client, W83795_REG_ALARM(i)); + /* Read beep settings */ + for (i = 0; i < ARRAY_SIZE(data->beeps); i++) data->beeps[i] = w83795_read(client, W83795_REG_BEEP(i)); - } err = w83795_handle_files(dev, device_create_file); if (err) -- 2.30.2