redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

ASoC: rt1011: Read and apply r0 and temperature device property

Browse source 
Typically, the r0 (calibration data) and temperature were measured in the factory.
This information is written into the non-volatile area
where keeps data whether factory reset or OS update.
In Chromium OS case, the coreboot will read the info from VPD and create
the device property for each rt1011.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Tested-By: Cheng-Yi Chiang <cychiang@chromium.org>
Link: https://lore.kernel.org/r/20191016085845.11672-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Shuming Fan 2019-10-16 16:58:45 +08:00 committed by Mark Brown
parent cf775f68a0
commit 8de6e75506
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 41 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

41
sound/soc/codecs/rt1011.c
View file

@ -2328,8 +2328,12 @@ static void rt1011_calibration_work(struct work_struct *work)
struct rt1011_priv *rt1011 =
container_of(work, struct rt1011_priv, cali_work);
struct snd_soc_component *component = rt1011->component;
unsigned int r0_integer, r0_factor, format;
rt1011_calibrate(rt1011, 1);
if (rt1011->r0_calib)
rt1011_calibrate(rt1011, 0);
else
rt1011_calibrate(rt1011, 1);
/*
* This flag should reset after booting.
@ -2340,6 +2344,39 @@ static void rt1011_calibration_work(struct work_struct *work)
/* initial */
rt1011_reg_init(component);
/* Apply temperature and calibration data from device property */
if (rt1011->temperature_calib) {
snd_soc_component_update_bits(component,
RT1011_STP_INITIAL_RESISTANCE_TEMP, 0x3ff,
(rt1011->temperature_calib << 2));
}
if (rt1011->r0_calib) {
rt1011->r0_reg = rt1011->r0_calib;
format = 2147483648U; /* 2^24 * 128 */
r0_integer = format / rt1011->r0_reg / 128;
r0_factor = ((format / rt1011->r0_reg * 100) / 128)
- (r0_integer * 100);
dev_info(component->dev, "DP r0 resistance about %d.%02d ohm, reg=0x%X\n",
r0_integer, r0_factor, rt1011->r0_reg);
rt1011_r0_load(rt1011);
}
}
static int rt1011_parse_dp(struct rt1011_priv *rt1011, struct device *dev)
{
device_property_read_u32(dev, "realtek,temperature_calib",
&rt1011->temperature_calib);
device_property_read_u32(dev, "realtek,r0_calib",
&rt1011->r0_calib);
dev_dbg(dev, "%s: r0_calib: 0x%x, temperture_calib: 0x%x",
__func__, rt1011->r0_calib, rt1011->temperature_calib);
return 0;
}
static int rt1011_i2c_probe(struct i2c_client *i2c,
@ -2356,6 +2393,8 @@ static int rt1011_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, rt1011);
rt1011_parse_dp(rt1011, &i2c->dev);
rt1011->regmap = devm_regmap_init_i2c(i2c, &rt1011_regmap);
if (IS_ERR(rt1011->regmap)) {
ret = PTR_ERR(rt1011->regmap);

1
sound/soc/codecs/rt1011.h
View file

@ -690,6 +690,7 @@ struct rt1011_priv {
int bq_drc_set;
unsigned int r0_reg, cali_done;
unsigned int r0_calib, temperature_calib;
int recv_spk_mode;
};