From 63b1be78774f8c3bdb9efd862ba7dfe8e2c056ff Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Tue, 28 Apr 2020 19:29:21 +0200 Subject: [PATCH] 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: Andy Shevchenko Signed-off-by: Hans de Goede Signed-off-by: Jonathan Cameron --- drivers/iio/light/cm32181.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c index 84c8d31..a5deb07 100644 --- a/drivers/iio/light/cm32181.c +++ b/drivers/iio/light/cm32181.c @@ -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); -- 2.7.4