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iio: adc: meson-saradc: Disable BL30 integration on G12A and newer SoCs 

G12A and newer don't use the SAR ADC to read the SoC temperature from
within the firmware. Instead there's now a dedicated thermal sensor.
Disable the BL30 integration for G12A and newer SoCs to save a few CPU
cycles when reading samples.
Adding a separate struct meson_sar_adc_data is a good idea anyways
because starting with G12A there's some extra registers to read the
samples in a simplified way.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20210717233718.332267-2-martin.blumenstingl@googlemail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Martin Blumenstingl 2021-07-18 01:37:16 +02:00 committed by Jonathan Cameron
parent a574e68ff5
commit 48dc1abde0
1 changed files with 9 additions and 1 deletions
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10
drivers/iio/adc/meson_saradc.c
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@ -1104,6 +1104,14 @@ static const struct meson_sar_adc_param meson_sar_adc_gxl_param = {
.resolution = 12, .resolution = 12,
}; };
static const struct meson_sar_adc_param meson_sar_adc_g12a_param = {
.has_bl30_integration = false,
.clock_rate = 1200000,
.bandgap_reg = MESON_SAR_ADC_REG11,
.regmap_config = &meson_sar_adc_regmap_config_gxbb,
.resolution = 12,
};
static const struct meson_sar_adc_data meson_sar_adc_meson8_data = { static const struct meson_sar_adc_data meson_sar_adc_meson8_data = {
.param = &meson_sar_adc_meson8_param, .param = &meson_sar_adc_meson8_param,
.name = "meson-meson8-saradc", .name = "meson-meson8-saradc",
@ -1140,7 +1148,7 @@ static const struct meson_sar_adc_data meson_sar_adc_axg_data = {
}; };
static const struct meson_sar_adc_data meson_sar_adc_g12a_data = { static const struct meson_sar_adc_data meson_sar_adc_g12a_data = {
.param = &meson_sar_adc_gxl_param, .param = &meson_sar_adc_g12a_param,
.name = "meson-g12a-saradc", .name = "meson-g12a-saradc",
}; };