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iio: light: noa1305: Use static table lookup of scale values

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Move scale values into a static table, perform look up of those
scale values in noa1305_scale() simply by using the integration
time register content as an index, because the integration time
register content directly maps to the table values.

Signed-off-by: Marek Vasut <marex@denx.de>
Link: https://patch.msgid.link/20240715183120.143417-3-marex@denx.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Marek Vasut 2024-07-15 20:28:57 +02:00 committed by Jonathan Cameron
parent dde56b6db4
commit 968a3bed1c
1 changed files with 15 additions and 36 deletions
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51
drivers/iio/light/noa1305.c
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@ -29,6 +29,7 @@
#define NOA1305_INTEGR_TIME_25MS 0x05
#define NOA1305_INTEGR_TIME_12_5MS 0x06
#define NOA1305_INTEGR_TIME_6_25MS 0x07
#define NOA1305_INTEGR_TIME_MASK 0x07
#define NOA1305_REG_INT_SELECT 0x3
#define NOA1305_INT_SEL_ACTIVE_HIGH 0x01
#define NOA1305_INT_SEL_ACTIVE_LOW 0x02
@ -43,6 +44,17 @@
#define NOA1305_DEVICE_ID 0x0519
#define NOA1305_DRIVER_NAME "noa1305"
static int noa1305_scale_available[] = {
100, 8 * 77, /* 800 ms */
100, 4 * 77, /* 400 ms */
100, 2 * 77, /* 200 ms */
100, 1 * 77, /* 100 ms */
1000, 5 * 77, /* 50 ms */
10000, 25 * 77, /* 25 ms */
100000, 125 * 77, /* 12.5 ms */
1000000, 625 * 77, /* 6.25 ms */
};
struct noa1305_priv {
struct i2c_client *client;
struct regmap *regmap;
@ -78,42 +90,9 @@ static int noa1305_scale(struct noa1305_priv *priv, int *val, int *val2)
* Integration Constant = 7.7
* Integration Time in Seconds
*/
switch (data) {
case NOA1305_INTEGR_TIME_800MS:
*val = 100;
*val2 = 77 * 8;
break;
case NOA1305_INTEGR_TIME_400MS:
*val = 100;
*val2 = 77 * 4;
break;
case NOA1305_INTEGR_TIME_200MS:
*val = 100;
*val2 = 77 * 2;
break;
case NOA1305_INTEGR_TIME_100MS:
*val = 100;
*val2 = 77;
break;
case NOA1305_INTEGR_TIME_50MS:
*val = 1000;
*val2 = 77 * 5;
break;
case NOA1305_INTEGR_TIME_25MS:
*val = 10000;
*val2 = 77 * 25;
break;
case NOA1305_INTEGR_TIME_12_5MS:
*val = 100000;
*val2 = 77 * 125;
break;
case NOA1305_INTEGR_TIME_6_25MS:
*val = 1000000;
*val2 = 77 * 625;
break;
default:
return -EINVAL;
}
data &= NOA1305_INTEGR_TIME_MASK;
*val = noa1305_scale_available[2 * data + 0];
*val2 = noa1305_scale_available[2 * data + 1];
return IIO_VAL_FRACTIONAL;
}