linux-kernel - [PATCH v2 14/19] iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for at91_adc_setup_samp

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Message-ID: <20220628151631.3116454-15-claudiu.beznea@microchip.com>
Date:   Tue, 28 Jun 2022 18:16:26 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <eugen.hristev@...rochip.com>, <jic23@...nel.org>,
        <lars@...afoo.de>, <nicolas.ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <claudiu.beznea@...rochip.com>,
        <robh+dt@...nel.org>, <krzk+dt@...nel.org>
CC:     <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: [PATCH v2 14/19] iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for at91_adc_setup_samp_freq()

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 <claudiu.beznea@...rochip.com>
---
 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 ee67f944b58c..3de5d1cb8a12 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1432,7 +1432,9 @@ 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;
@@ -1440,17 +1442,17 @@ 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;
 }
 
@@ -1722,7 +1724,8 @@ 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;
@@ -1904,7 +1907,8 @@ 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