diff options
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/tyan/s2881/mainboard.c | 71 |
1 files changed, 38 insertions, 33 deletions
diff --git a/src/mainboard/tyan/s2881/mainboard.c b/src/mainboard/tyan/s2881/mainboard.c index 5917dbc733..c45300a6df 100644 --- a/src/mainboard/tyan/s2881/mainboard.c +++ b/src/mainboard/tyan/s2881/mainboard.c @@ -26,7 +26,8 @@ #include <device/smbus.h> /** - * Do some s2881-specific HWM initialization for the ADT7463 chip + * Do some S2881-specific HWM initialization for the ADT7463 chip. + * * See Analog Devices ADT7463 datasheet, Rev C (2004): * http://www.analog.com/en/prod/0,,766_825_ADT7463,00.html */ @@ -38,61 +39,64 @@ static void dummy_init(device_t dev) int result; - /* Find the smbus controller (amd-8111) */ + /* Find the SMBus controller (AMD-8111). */ smbus_dev = dev_find_device(0x1022, 0x746b, 0); if (!smbus_dev) { - die("SMBUS controller not found\n"); + die("SMBus controller not found\n"); } - printk_debug("smbus controller found\n"); + printk_debug("SMBus controller found\n"); - /* Find the adt7463 device */ + /* Find the ADT7463 device. */ path.type = DEVICE_PATH_I2C; path.u.i2c.device = 0x2d; adt7463 = find_dev_path(smbus_dev->link, &path); if (!adt7463) { - die("adt7463 not found\n"); + die("ADT7463 not found\n"); } - printk_debug("adt7463 found\n"); + printk_debug("ADT7463 found\n"); - /* Set all fans to 'Fastest Speed Calculated by All 3 Temperature Channels Controls PWMx.' */ + /* Set all fans to 'Fastest Speed Calculated by All 3 Temperature + * Channels Controls PWMx'. + */ result = smbus_write_byte(adt7463, 0x5c, 0xc2); result = smbus_write_byte(adt7463, 0x5d, 0xc2); result = smbus_write_byte(adt7463, 0x5e, 0xc2); - /* Make sure that our fans never stop when temp falls below Tmin, + /* Make sure that our fans never stop when temp. falls below Tmin, but rather keep going at minimum duty cycle (applies to automatic - fan control mode only) */ + fan control mode only). */ result = smbus_write_byte(adt7463, 0x62, 0xc0); - /* Set minimum PWM duty cycle to 25%, rather than the default 50% */ + /* Set minimum PWM duty cycle to 25%, rather than the default 50%. */ result = smbus_write_byte(adt7463, 0x64, 0x40); result = smbus_write_byte(adt7463, 0x65, 0x40); result = smbus_write_byte(adt7463, 0x66, 0x40); /* Set Tmin to 55C, rather than the default 90C. Above this temperature the fans will start blowing harder as temperature increases - (automatic mode only) */ + (automatic mode only). */ result = smbus_write_byte(adt7463, 0x67, 0x37); result = smbus_write_byte(adt7463, 0x68, 0x37); result = smbus_write_byte(adt7463, 0x69, 0x37); - /* Set THERM limit to 70C, rather than the default 100C + /* Set THERM limit to 70C, rather than the default 100C. The fans will kick in at 100% if the sensors reach this temperature, - (only in automatic mode, but supposedly even when hardware is locked up) - This is a failsafe measure. */ + (only in automatic mode, but supposedly even when hardware is + locked up). This is a failsafe measure. */ result = smbus_write_byte(adt7463, 0x6a, 0x46); result = smbus_write_byte(adt7463, 0x6b, 0x46); result = smbus_write_byte(adt7463, 0x6c, 0x46); - /* Remote temperature 1 offset (LSB == 0.25C) */ + /* Remote temperature 1 offset (LSB == 0.25C). */ result = smbus_write_byte(adt7463, 0x70, 0x02); - /* Remote temperature 2 offset (LSB == 0.25C) */ + + /* Remote temperature 2 offset (LSB == 0.25C). */ result = smbus_write_byte(adt7463, 0x72, 0x01); - /* set TACH measurements to normal (1/second) */ + /* Set TACH measurements to normal (1/second). */ result = smbus_write_byte(adt7463, 0x78, 0xf0); - printk_debug("adt7463 properly initilized"); + printk_debug("ADT7463 properly initialized"); } static void dummy_noop(device_t dummy) @@ -100,10 +104,10 @@ static void dummy_noop(device_t dummy) } static struct device_operations dummy_operations = { - .read_resources = dummy_noop, - .set_resources = dummy_noop, - .enable_resources = dummy_noop, - .init = dummy_init, + .read_resources = dummy_noop, + .set_resources = dummy_noop, + .enable_resources = dummy_noop, + .init = dummy_init, }; static unsigned int scan_root_bus(device_t root, unsigned int max) @@ -116,15 +120,16 @@ static unsigned int scan_root_bus(device_t root, unsigned int max) printk_debug("scan_root_bus ok\n"); - /* The following is a little silly. We need a hook into the boot process *after* - * the ADT7643 device has been initialized. So we create this dummy device, and we - * put the ADT7643 s2881 specific settings in its init function, which gets called + /* The following is a little silly. We need a hook into the boot + * process *after* the ADT7643 device has been initialized. So we + * create this dummy device, and we put the ADT7643 S2881 specific + * settings in its init function, which gets called * as the last device to be initialized. */ link_i = root->links; if (link_i >= MAX_LINKS) { - printk_debug("reached MAX_LINKS, not configuring adt7463"); + printk_debug("Reached MAX_LINKS, not configuring ADT7463"); return max; } root->link[link_i].link = link_i; @@ -142,11 +147,11 @@ static unsigned int scan_root_bus(device_t root, unsigned int max) } static struct device_operations mainboard_operations = { - .read_resources = root_dev_read_resources, - .set_resources = root_dev_set_resources, - .enable_resources = root_dev_enable_resources, - .init = root_dev_init, - .scan_bus = scan_root_bus, + .read_resources = root_dev_read_resources, + .set_resources = root_dev_set_resources, + .enable_resources = root_dev_enable_resources, + .init = root_dev_init, + .scan_bus = scan_root_bus, }; static void enable_dev(struct device *dev) @@ -157,6 +162,6 @@ static void enable_dev(struct device *dev) #if CONFIG_CHIP_NAME == 1 struct chip_operations mainboard_tyan_s2881_ops = { CHIP_NAME("Tyan S2881 Mainboard") - .enable_dev = enable_dev, + .enable_dev = enable_dev, }; #endif |