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iio: light: cm32181: Make lux_per_bit and lux_per_bit_base_it runtime settings

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Make lux_per_bit and lux_per_bit_base_it settings stored in struct
cm32181_chip instead of a hardcoded (defined) values.

This is a preparation patch for reading some ACPI tables which specify
a device specific lux_per_bit value.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Hans de Goede 2020-04-28 19:29:21 +02:00 committed by Jonathan Cameron
parent f50f98310e
commit 63b1be7877
1 changed files with 6 additions and 2 deletions
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8
drivers/iio/light/cm32181.c
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@ -70,6 +70,8 @@ struct cm32181_chip {
u16 conf_regs[CM32181_CONF_REG_NUM];
unsigned long init_regs_bitmap;
int calibscale;
int lux_per_bit;
int lux_per_bit_base_it;
int num_als_it;
const int *als_it_bits;
const int *als_it_values;
@ -115,6 +117,8 @@ static int cm32181_reg_init(struct cm32181_chip *cm32181)
CM32181_CMD_ALS_IT_DEFAULT | CM32181_CMD_ALS_SM_DEFAULT;
cm32181->init_regs_bitmap = BIT(CM32181_REG_ADDR_CMD);
cm32181->calibscale = CM32181_CALIBSCALE_DEFAULT;
cm32181->lux_per_bit = CM32181_LUX_PER_BIT;
cm32181->lux_per_bit_base_it = CM32181_LUX_PER_BIT_BASE_IT;
/* Initialize registers*/
for_each_set_bit(i, &cm32181->init_regs_bitmap, CM32181_CONF_REG_NUM) {
@ -211,8 +215,8 @@ static int cm32181_get_lux(struct cm32181_chip *cm32181)
if (ret < 0)
return -EINVAL;
lux = CM32181_LUX_PER_BIT;
lux *= CM32181_LUX_PER_BIT_BASE_IT;
lux = cm32181->lux_per_bit;
lux *= cm32181->lux_per_bit_base_it;
lux = div_u64(lux, als_it);
ret = i2c_smbus_read_word_data(client, CM32181_REG_ADDR_ALS);