[PATCH v3 14/19] iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for at91_adc_setup_samp_freq()
From: Claudiu Beznea <hidden>
Date: 2022-08-03 10:29:19
Also in:
linux-devicetree, linux-iio, lkml
Subsystem:
iio subsystem and drivers, microchip sama5d2-compatible adc driver, the rest · Maintainers:
Jonathan Cameron, Eugen Hristev, Linus Torvalds
Add startup and tracktim as parameter for at91_adc_setup_samp_freq() function. In case of temperature sensor being enabled these parameters will be configured on temperature read request to improve the accuracy of the read temperature. Signed-off-by: Claudiu Beznea <redacted> --- drivers/iio/adc/at91-sama5d2_adc.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 0209353cbfd7..fd02da9b26b2 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c@@ -1435,7 +1435,9 @@ static unsigned at91_adc_startup_time(unsigned startup_time_min, return i; } -static void at91_adc_setup_samp_freq(struct iio_dev *indio_dev, unsigned freq) +static void at91_adc_setup_samp_freq(struct iio_dev *indio_dev, unsigned freq, + unsigned int startup_time, + unsigned int tracktim) { struct at91_adc_state *st = iio_priv(indio_dev); unsigned f_per, prescal, startup, mr;
@@ -1443,17 +1445,17 @@ static void at91_adc_setup_samp_freq(struct iio_dev *indio_dev, unsigned freq) f_per = clk_get_rate(st->per_clk); prescal = (f_per / (2 * freq)) - 1; - startup = at91_adc_startup_time(st->soc_info.startup_time, - freq / 1000); + startup = at91_adc_startup_time(startup_time, freq / 1000); mr = at91_adc_readl(st, MR); mr &= ~(AT91_SAMA5D2_MR_STARTUP_MASK | AT91_SAMA5D2_MR_PRESCAL_MASK); mr |= AT91_SAMA5D2_MR_STARTUP(startup); mr |= AT91_SAMA5D2_MR_PRESCAL(prescal); + mr |= AT91_SAMA5D2_MR_TRACKTIM(tracktim); at91_adc_writel(st, MR, mr); - dev_dbg(&indio_dev->dev, "freq: %u, startup: %u, prescal: %u\n", - freq, startup, prescal); + dev_dbg(&indio_dev->dev, "freq: %u, startup: %u, prescal: %u, tracktim=%u\n", + freq, startup, prescal, tracktim); st->current_sample_rate = freq; }
@@ -1725,7 +1727,8 @@ static int at91_adc_write_raw(struct iio_dev *indio_dev, if (ret) return ret; mutex_lock(&st->lock); - at91_adc_setup_samp_freq(indio_dev, val); + at91_adc_setup_samp_freq(indio_dev, val, + st->soc_info.startup_time, 0); mutex_unlock(&st->lock); iio_device_release_direct_mode(indio_dev); return 0;
@@ -1907,7 +1910,8 @@ static void at91_adc_hw_init(struct iio_dev *indio_dev) at91_adc_writel(st, MR, AT91_SAMA5D2_MR_TRANSFER(2) | AT91_SAMA5D2_MR_ANACH); - at91_adc_setup_samp_freq(indio_dev, st->soc_info.min_sample_rate); + at91_adc_setup_samp_freq(indio_dev, st->soc_info.min_sample_rate, + st->soc_info.startup_time, 0); /* configure extended mode register */ at91_adc_config_emr(st, st->oversampling_ratio, 0);
--
2.34.1
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