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| author | Jean Delvare <khali@linux-fr.org> | 2010-10-28 20:31:48 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2010-10-28 20:31:48 +0200 |
| commit | fd7f82b8a37ff4d400c2db9c9fa8f9467dc54a08 (patch) | |
| tree | 41eff04a59f8b78d5d3950911e60851277043ab7 /drivers | |
| parent | 5f7b77cbd4599b6a90d18981d9883a3e20e689fb (diff) | |
| download | kernel-common-fd7f82b8a37ff4d400c2db9c9fa8f9467dc54a08.tar.gz kernel-common-fd7f82b8a37ff4d400c2db9c9fa8f9467dc54a08.tar.bz2 kernel-common-fd7f82b8a37ff4d400c2db9c9fa8f9467dc54a08.zip | |
hwmon: (w83795) Make W83795_REG_PWM more efficient
Cascaded conditionals are inefficient. Reorder the fields so that
PWM register addresses can be computed more efficiently.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/w83795.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c index a1d884bb58ad..35f87ca88cf3 100644 --- a/drivers/hwmon/w83795.c +++ b/drivers/hwmon/w83795.c @@ -178,15 +178,11 @@ static const u8 IN_LSB_SHIFT_IDX[][2] = { #define W83795_REG_TSS(index) (0x209 + (index)) #define PWM_OUTPUT 0 -#define PWM_START 1 -#define PWM_NONSTOP 2 -#define PWM_STOP_TIME 3 -#define PWM_FREQ 4 -#define W83795_REG_PWM(index, nr) \ - (((nr) == 0 ? 0x210 : \ - (nr) == 1 ? 0x220 : \ - (nr) == 2 ? 0x228 : \ - (nr) == 3 ? 0x230 : 0x218) + (index)) +#define PWM_FREQ 1 +#define PWM_START 2 +#define PWM_NONSTOP 3 +#define PWM_STOP_TIME 4 +#define W83795_REG_PWM(index, nr) (0x210 + (nr) * 8 + (index)) #define W83795_REG_FTSH(index) (0x240 + (index) * 2) #define W83795_REG_FTSL(index) (0x241 + (index) * 2) @@ -356,8 +352,8 @@ struct w83795_data { u8 has_pwm; /* 795g supports 8 pwm, 795adg only supports 2, * no config register, only affected by chip * type */ - u8 pwm[8][5]; /* Register value, output, start, non stop, stop - * time, freq */ + u8 pwm[8][5]; /* Register value, output, freq, start, + * non stop, stop time */ u16 clkin; /* CLKIN frequency in kHz */ u8 pwm_fcms[2]; /* Register value */ u8 pwm_tfmr[6]; /* Register value */ @@ -1979,7 +1975,7 @@ static int w83795_probe(struct i2c_client *client, data->pwm_tfmr[i] = w83795_read(client, W83795_REG_TFMR(i)); data->pwm_fomc = w83795_read(client, W83795_REG_FOMC); for (i = 0; i < data->has_pwm; i++) { - for (tmp = PWM_START; tmp <= PWM_FREQ; tmp++) + for (tmp = PWM_FREQ; tmp <= PWM_STOP_TIME; tmp++) data->pwm[i][tmp] = w83795_read(client, W83795_REG_PWM(i, tmp)); } |