drivers/i2c/lm96000: Add more settings for fan control
Allow to set a lower temperature limit, as the currently hard-coded
25C may be to low for a given temperature sensor. Also enable smoo-
thing, currently hard-coded to the maximum interval of 35s, and set
the hysteresis value.
Change-Id: I5fde1cf909e8fbbaf8a345790b00c58a73c19ef8
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35475
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/drivers/i2c/lm96000/lm96000.c b/src/drivers/i2c/lm96000/lm96000.c
index 4a3c2eb..7fbb31b 100644
--- a/src/drivers/i2c/lm96000/lm96000.c
+++ b/src/drivers/i2c/lm96000/lm96000.c
@@ -156,9 +156,9 @@
{ 2, 3, 3, 4, 5, 7, 8, 10, 13, 16, 20, 27, 32, 40, 53, 80 };
unsigned int i;
- /* find longest range that starts from 25°C */
+ /* find longest range that starts from `low_temp` */
for (i = ARRAY_SIZE(temp_range) - 1; i > 0; --i) {
- if (temp_range[i] + 25 <= config->target_temp)
+ if (config->low_temp + temp_range[i] <= config->target_temp)
break;
}
@@ -170,9 +170,16 @@
: 0);
lm96000_write(dev, LM96000_ZONE_TEMP_PANIC(zone),
config->panic_temp ? config->panic_temp : 100);
+ lm96000_update(dev, LM96000_ZONE_SMOOTH(zone),
+ LM96000_ZONE_SMOOTH_MASK(zone),
+ LM96000_ZONE_SMOOTH_EN(zone) | 0); /* 0: 35s */
lm96000_update(dev, LM96000_FAN_MIN_OFF,
LM96000_FAN_MIN(zone),
config->min_off ? LM96000_FAN_MIN(zone) : 0);
+ lm96000_update(dev, LM96000_ZONE_HYSTERESIS(zone),
+ LM96000_ZONE_HYST_MASK(zone),
+ config->hysteresis << LM96000_ZONE_HYST_SHIFT(zone)
+ & LM96000_ZONE_HYST_MASK(zone));
}
static void lm96000_init(struct device *const dev)