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eeepc-laptop: replace magic numbers with defines

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eeepc_[gs]et_fan_ctrl uses some magic numbers. These numbers mean
something more than just the number. Describe them with macros instead
of comments in one of the functions.

Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
This commit is contained in:
Frans Klaver 2014-10-22 21:12:41 +02:00 committed by Darren Hart
parent 792bd2a58f
commit a5de681c0c
1 changed files with 10 additions and 6 deletions
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16
drivers/platform/x86/eeepc-laptop.c
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@ -1005,15 +1005,19 @@ static int eeepc_get_fan_rpm(void)
return high << 8 | low;
}
#define EEEPC_EC_FAN_CTRL_BIT 0x02
#define EEEPC_FAN_CTRL_MANUAL 1
#define EEEPC_FAN_CTRL_AUTO 2
static int eeepc_get_fan_ctrl(void)
{
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (value & 0x02)
return 1; /* manual */
if (value & EEEPC_EC_FAN_CTRL_BIT)
return EEEPC_FAN_CTRL_MANUAL;
else
return 2; /* automatic */
return EEEPC_FAN_CTRL_AUTO;
}
static void eeepc_set_fan_ctrl(int manual)
@ -1021,10 +1025,10 @@ static void eeepc_set_fan_ctrl(int manual)
u8 value = 0;
ec_read(EEEPC_EC_FAN_CTRL, &value);
if (manual == 1)
value |= 0x02;
if (manual == EEEPC_FAN_CTRL_MANUAL)
value |= EEEPC_EC_FAN_CTRL_BIT;
else
value &= ~0x02;
value &= ~EEEPC_EC_FAN_CTRL_BIT;
ec_write(EEEPC_EC_FAN_CTRL, value);
}