Commit 63b1be78 authored by Hans de Goede's avatar Hans de Goede Committed by Jonathan Cameron
Browse files

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



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: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent f50f9831

drivers/iio/light/cm32181.c

+6 −2
Original line number Diff line number Diff line
@@ -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);