From 6d6006b8db5ead05053ccfbc45ab7e5c600a81b1 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Sun, 2 Dec 2007 23:33:57 +0100 Subject: [PATCH] hwmon: (adm1031) Various cleanups * Rename new_client to client * Drop redundant initializations to 0 * Drop trailing space * Other whitespace cleanups * Split/fold a few long lines * Constify static data * Optimizations in set_fan_div() Signed-off-by: Jean Delvare Signed-off-by: Mark M. Hoffman --- drivers/hwmon/adm1031.c | 126 ++++++++++++++++++++-------------------- 1 file changed, 62 insertions(+), 64 deletions(-) diff --git a/drivers/hwmon/adm1031.c b/drivers/hwmon/adm1031.c index 558d83b25b..b3e358c65d 100644 --- a/drivers/hwmon/adm1031.c +++ b/drivers/hwmon/adm1031.c @@ -5,7 +5,7 @@ Supports adm1030 / adm1031 Copyright (C) 2004 Alexandre d'Alton Reworked by Jean Delvare - + This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or @@ -32,22 +32,22 @@ /* Following macros takes channel parameter starting from 0 to 2 */ #define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr)) -#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr)) +#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr)) #define ADM1031_REG_PWM (0x22) #define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr)) -#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4*(nr)) -#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4*(nr)) -#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4*(nr)) +#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr)) +#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr)) +#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr)) -#define ADM1031_REG_TEMP(nr) (0xa + (nr)) +#define ADM1031_REG_TEMP(nr) (0x0a + (nr)) #define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr)) #define ADM1031_REG_STATUS(nr) (0x2 + (nr)) -#define ADM1031_REG_CONF1 0x0 -#define ADM1031_REG_CONF2 0x1 -#define ADM1031_REG_EXT_TEMP 0x6 +#define ADM1031_REG_CONF1 0x00 +#define ADM1031_REG_CONF2 0x01 +#define ADM1031_REG_EXT_TEMP 0x06 #define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */ #define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */ @@ -78,7 +78,7 @@ struct adm1031_data { /* The chan_select_table contains the possible configurations for * auto fan control. */ - auto_chan_table_t *chan_select_table; + const auto_chan_table_t *chan_select_table; u16 alarm; u8 conf1; u8 conf2; @@ -181,25 +181,25 @@ static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm) #define GET_FAN_AUTO_BITFIELD(data, idx) \ (*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2] -/* The tables below contains the possible values for the auto fan +/* The tables below contains the possible values for the auto fan * control bitfields. the index in the table is the register value. * MSb is the auto fan control enable bit, so the four first entries * in the table disables auto fan control when both bitfields are zero. */ -static auto_chan_table_t auto_channel_select_table_adm1031 = { - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {2 /*0b010 */ , 4 /*0b100 */ }, - {2 /*0b010 */ , 2 /*0b010 */ }, - {4 /*0b100 */ , 4 /*0b100 */ }, - {7 /*0b111 */ , 7 /*0b111 */ }, +static const auto_chan_table_t auto_channel_select_table_adm1031 = { + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 2 /* 0b010 */ , 4 /* 0b100 */ }, + { 2 /* 0b010 */ , 2 /* 0b010 */ }, + { 4 /* 0b100 */ , 4 /* 0b100 */ }, + { 7 /* 0b111 */ , 7 /* 0b111 */ }, }; -static auto_chan_table_t auto_channel_select_table_adm1030 = { - {0, 0}, {0, 0}, {0, 0}, {0, 0}, - {2 /*0b10 */ , 0}, - {0xff /*invalid */ , 0}, - {0xff /*invalid */ , 0}, - {3 /*0b11 */ , 0}, +static const auto_chan_table_t auto_channel_select_table_adm1030 = { + { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, + { 2 /* 0b10 */ , 0 }, + { 0xff /* invalid */ , 0 }, + { 0xff /* invalid */ , 0 }, + { 3 /* 0b11 */ , 0 }, }; /* That function checks if a bitfield is valid and returns the other bitfield @@ -228,8 +228,8 @@ get_fan_auto_nearest(struct adm1031_data *data, break; } else if (val == (*data->chan_select_table)[i][chan] && first_match == -1) { - /* Save the first match in case of an exact match has not been - * found + /* Save the first match in case of an exact match has + * not been found */ first_match = i; } @@ -264,16 +264,17 @@ set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr) old_fan_mode = data->conf1; mutex_lock(&data->update_lock); - + if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, ®))) { mutex_unlock(&data->update_lock); return ret; } - if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^ + data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1); + if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^ (old_fan_mode & ADM1031_CONF1_AUTO_MODE)) { if (data->conf1 & ADM1031_CONF1_AUTO_MODE){ - /* Switch to Auto Fan Mode - * Save PWM registers + /* Switch to Auto Fan Mode + * Save PWM registers * Set PWM registers to 33% Both */ data->old_pwm[0] = data->pwm[0]; data->old_pwm[1] = data->pwm[1]; @@ -283,7 +284,7 @@ set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr) data->pwm[0] = data->old_pwm[0]; data->pwm[1] = data->old_pwm[1]; /* Restore PWM registers */ - adm1031_write_value(client, ADM1031_REG_PWM, + adm1031_write_value(client, ADM1031_REG_PWM, data->pwm[0] | (data->pwm[1] << 4)); } } @@ -314,7 +315,7 @@ fan_auto_channel_offset(2); static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr) { struct adm1031_data *data = adm1031_update_device(dev); - return sprintf(buf, "%d\n", + return sprintf(buf, "%d\n", AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr])); } static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr) @@ -407,7 +408,7 @@ set_pwm(struct device *dev, const char *buf, size_t count, int nr) int reg; mutex_lock(&data->update_lock); - if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) && + if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) && (((val>>4) & 0xf) != 5)) { /* In automatic mode, the only PWM accepted is 33% */ mutex_unlock(&data->update_lock); @@ -471,7 +472,7 @@ static int trust_fan_readings(struct adm1031_data *data, int chan) AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0]) || data->temp[1] >= AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]) - || (data->chip_type == adm1031 + || (data->chip_type == adm1031 && data->temp[2] >= AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2])); break; @@ -514,7 +515,7 @@ set_fan_min(struct device *dev, const char *buf, size_t count, int nr) mutex_lock(&data->update_lock); if (val) { - data->fan_min[nr] = + data->fan_min[nr] = FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr])); } else { data->fan_min[nr] = 0xff; @@ -535,12 +536,12 @@ set_fan_div(struct device *dev, const char *buf, size_t count, int nr) tmp = val == 8 ? 0xc0 : val == 4 ? 0x80 : - val == 2 ? 0x40 : - val == 1 ? 0x00 : + val == 2 ? 0x40 : + val == 1 ? 0x00 : 0xff; if (tmp == 0xff) return -EINVAL; - + mutex_lock(&data->update_lock); /* Get fresh readings */ data->fan_div[nr] = adm1031_read_value(client, @@ -550,14 +551,13 @@ set_fan_div(struct device *dev, const char *buf, size_t count, int nr) /* Write the new clock divider and fan min */ old_div = FAN_DIV_FROM_REG(data->fan_div[nr]); - data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]); - new_min = data->fan_min[nr] * old_div / - FAN_DIV_FROM_REG(data->fan_div[nr]); + data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]); + new_min = data->fan_min[nr] * old_div / val; data->fan_min[nr] = new_min > 0xff ? 0xff : new_min; - adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr), + adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr), data->fan_div[nr]); - adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), + adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]); /* Invalidate the cache: fan speed is no longer valid */ @@ -796,7 +796,7 @@ static const struct attribute_group adm1031_group_opt = { /* This function is called by i2c_probe */ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind) { - struct i2c_client *new_client; + struct i2c_client *client; struct adm1031_data *data; int err = 0; const char *name = ""; @@ -809,17 +809,16 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind) goto exit; } - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &adm1031_driver; - new_client->flags = 0; + client = &data->client; + i2c_set_clientdata(client, data); + client->addr = address; + client->adapter = adapter; + client->driver = &adm1031_driver; if (kind < 0) { int id, co; - id = i2c_smbus_read_byte_data(new_client, 0x3d); - co = i2c_smbus_read_byte_data(new_client, 0x3e); + id = i2c_smbus_read_byte_data(client, 0x3d); + co = i2c_smbus_read_byte_data(client, 0x3e); if (!((id == 0x31 || id == 0x30) && co == 0x41)) goto exit_free; @@ -840,28 +839,27 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind) } data->chip_type = kind; - strlcpy(new_client->name, name, I2C_NAME_SIZE); - data->valid = 0; + strlcpy(client->name, name, I2C_NAME_SIZE); mutex_init(&data->update_lock); /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) + if ((err = i2c_attach_client(client))) goto exit_free; /* Initialize the ADM1031 chip */ - adm1031_init_client(new_client); + adm1031_init_client(client); /* Register sysfs hooks */ - if ((err = sysfs_create_group(&new_client->dev.kobj, &adm1031_group))) + if ((err = sysfs_create_group(&client->dev.kobj, &adm1031_group))) goto exit_detach; if (kind == adm1031) { - if ((err = sysfs_create_group(&new_client->dev.kobj, + if ((err = sysfs_create_group(&client->dev.kobj, &adm1031_group_opt))) goto exit_remove; } - data->hwmon_dev = hwmon_device_register(&new_client->dev); + data->hwmon_dev = hwmon_device_register(&client->dev); if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); goto exit_remove; @@ -870,10 +868,10 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind) return 0; exit_remove: - sysfs_remove_group(&new_client->dev.kobj, &adm1031_group); - sysfs_remove_group(&new_client->dev.kobj, &adm1031_group_opt); + sysfs_remove_group(&client->dev.kobj, &adm1031_group); + sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt); exit_detach: - i2c_detach_client(new_client); + i2c_detach_client(client); exit_free: kfree(data); exit: @@ -905,7 +903,7 @@ static void adm1031_init_client(struct i2c_client *client) if (data->chip_type == adm1031) { mask |= (ADM1031_CONF2_PWM2_ENABLE | ADM1031_CONF2_TACH2_ENABLE); - } + } /* Initialize the ADM1031 chip (enables fan speed reading ) */ read_val = adm1031_read_value(client, ADM1031_REG_CONF2); if ((read_val | mask) != read_val) { @@ -984,7 +982,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev) if (data->chip_type == adm1030) { data->alarm &= 0xc0ff; } - + for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) { data->fan_div[chan] = adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan)); @@ -993,7 +991,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev) data->fan[chan] = adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan)); data->pwm[chan] = - 0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >> + 0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >> (4*chan)); } data->last_updated = jiffies; -- 2.39.5