Messages in this thread | | | Subject | Re: [PATCH v2 10/16] iio: adc: sun4i-gpadc-iio: add support for A83T thermal sensor | From | Philipp Rossak <> | Date | Mon, 29 Jan 2018 12:53:48 +0100 |
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On 29.01.2018 10:48, Maxime Ripard wrote: > On Mon, Jan 29, 2018 at 12:29:13AM +0100, Philipp Rossak wrote: >> This patch adds support for the A83T ths sensor. >> >> The A83T supports interrupts. The interrupt is configured to update the >> the sensor values every second. >> >> Signed-off-by: Philipp Rossak <embed3d@gmail.com> >> --- >> drivers/iio/adc/sun4i-gpadc-iio.c | 38 ++++++++++++++++++++++++++++++++++++++ >> include/linux/mfd/sun4i-gpadc.h | 18 ++++++++++++++++++ >> 2 files changed, 56 insertions(+) >> >> diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c >> index 8196203d65fe..9f7895ba1966 100644 >> --- a/drivers/iio/adc/sun4i-gpadc-iio.c >> +++ b/drivers/iio/adc/sun4i-gpadc-iio.c >> @@ -170,6 +170,40 @@ static const struct gpadc_data sun8i_h3_ths_data = { >> SUN8I_H3_THS_TEMP_PERIOD(0x7), >> }; >> >> +static const struct gpadc_data sun8i_a83t_ths_data = { >> + .temp_offset = -2724, >> + .temp_scale = -70, >> + .temp_data = {SUN8I_H3_THS_TDATA0, >> + SUN8I_A83T_THS_TDATA1, >> + SUN8I_A83T_THS_TDATA2, >> + 0}, >> + .sample_start = sunxi_ths_sample_start, >> + .sample_end = sunxi_ths_sample_end, >> + .sensor_count = 3, >> + .supports_nvmem = false, >> + .support_irq = true, >> + .ctrl0_map = SUN4I_GPADC_CTRL0_T_ACQ(0x1f3), >> + .ctrl2_map = SUN8I_H3_THS_ACQ1(0x1f3), > > Where are these values coming from? >
These values are calculated with the formulas from the datasheet and also tested on hardware. These settings seem ok.
>> + .sensor_en_map = SUN8I_H3_THS_TEMP_SENSE_EN0 | >> + SUN8I_A83T_THS_TEMP_SENSE_EN1 | >> + SUN8I_A83T_THS_TEMP_SENSE_EN2, >> + .filter_map = SUN4I_GPADC_CTRL3_FILTER_EN | >> + SUN4I_GPADC_CTRL3_FILTER_TYPE(0x2), >> + .irq_clear_map = SUN8I_H3_THS_INTS_ALARM_INT_0 | >> + SUN8I_A83T_THS_INTS_ALARM_INT_1 | >> + SUN8I_A83T_THS_INTS_ALARM_INT_2 | >> + SUN8I_H3_THS_INTS_SHUT_INT_0 | >> + SUN8I_A83T_THS_INTS_SHUT_INT_1 | >> + SUN8I_A83T_THS_INTS_SHUT_INT_2 | >> + SUN8I_H3_THS_INTS_TDATA_IRQ_0 | >> + SUN8I_A83T_THS_INTS_TDATA_IRQ_1 | >> + SUN8I_A83T_THS_INTS_TDATA_IRQ_2, > > Do you reall need to clear all these interrupts if you're using only > one? >
No, I don't think so, I will remove them in the next version.
> Maxime >
Philipp
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