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mb/starlabs/starlite_adl: Make I2C speed configurable

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Make the I2C speed user configurable from CMOS. Both the touchscreen
and accelerometer support running at 100MHz or 400MHz. They perform
better at 400MHz but use more power - this patch lets the user choose.

Change-Id: Ia1b08d7ec6212418bb95d0a52077f01c930f8830
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83882
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com>
This commit is contained in:
Sean Rhodes 2024-08-12 10:19:34 +01:00
commit 4094ae369d
2 changed files with 6 additions and 9 deletions
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9
src/mainboard/starlabs/starlite_adl/variants/mk_v/devicetree.cb
View file

@ -1,13 +1,4 @@
chip soc/intel/alderlake
register "common_soc_config" = "{
.i2c[0] = {
.speed = I2C_SPEED_FAST,
},
.i2c[2] = {
.speed = I2C_SPEED_FAST,
},
}"
# FSP UPDs
register "cnvi_bt_audio_offload" = "true"
register "cnvi_bt_core" = "true"

6
src/mainboard/starlabs/starlite_adl/variants/mk_v/devtree.c
View file

@ -63,4 +63,10 @@ void devtree_update(void)
/* Enable/Disable Accelerometer based on CMOS settings */
if (get_uint_option("accelerometer", 1) == 0)
accelerometer_dev->enabled = 0;
/* Set I2C devices speed to fast based on CMOS settings */
if (get_uint_option("i2c_speed_fast", 0) == 1) {
common_config->i2c[0].speed = I2C_SPEED_FAST;
common_config->i2c[2].speed = I2C_SPEED_FAST;
}
}