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ec/kontron/it8516e: Remove some unsafe bit shifting 

The EC expects the temperature in 64ths degree C. Alter
it8516e_set_fan_temperature() to just export this interface and
make the calculation more obvious.

Change-Id: Ibe241b7909f4c02b30b1e1200a1850d47695a765
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/3785
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Nico Huber 2013-07-18 11:27:30 +02:00 committed by Stefan Reinauer
parent 8e1a7cc06f
commit 260c33ba56
1 changed files with 4 additions and 4 deletions
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8
src/ec/kontron/it8516e/ec.c
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@ -79,15 +79,15 @@ static void it8516e_set_fan_speed(const u8 idx, const u16 speed)
send_ec_data(speed >> 8);
}
static void it8516e_set_fan_temperature(const u8 idx, const u8 temp)
static void it8516e_set_fan_temperature(const u8 idx, const u16 temp)
{
if (send_ec_command(IT8516E_CMD_SET_FAN_TEMP))
return;
if (send_ec_data(idx))
return;
if (send_ec_data((temp << 6) & 0xff))
if (send_ec_data(temp & 0xff))
return;
send_ec_data(((temp << 6) >> 8) & 0xff);
send_ec_data(temp >> 8);
}
static void it8516e_set_fan_limits(const u8 idx, const u8 min, const u8 max)
@ -147,7 +147,7 @@ static void it8516e_set_fan_from_options(const config_t *const config,
printk(BIOS_DEBUG,
"Setting it8516e fan%d control to %d C.\n",
fan_idx + 1, fan_target);
it8516e_set_fan_temperature(fan_idx, fan_target);
it8516e_set_fan_temperature(fan_idx, fan_target * 64);
fanX_min[3] = '1' + fan_idx;
fanX_max[3] = '1' + fan_idx;