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From: Billy Tsai <billy_tsai@aspeedtech.com>
To: <jic23@kernel.org>, <lars@metafoo.de>, <pmeerw@pmeerw.net>,
	<robh+dt@kernel.org>, <joel@jms.id.au>, <andrew@aj.id.au>,
	<p.zabel@pengutronix.de>, <lgirdwood@gmail.com>,
	<broonie@kernel.org>, <linux-iio@vger.kernel.org>,
	<devicetree@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>
Cc: <BMC-SW@aspeedtech.com>
Subject: [v4 06/15] iio: adc: aspeed: Add vref config function
Date: Mon, 23 Aug 2021 15:02:31 +0800	[thread overview]
Message-ID: <20210823070240.12600-7-billy_tsai@aspeedtech.com> (raw)
In-Reply-To: <20210823070240.12600-1-billy_tsai@aspeedtech.com>

Add the function to check the vref_fixed and set the value to driver
data.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
---
 drivers/iio/adc/aspeed_adc.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index f03c7921d534..f260e40ab9b2 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -122,7 +122,7 @@ static int aspeed_adc_read_raw(struct iio_dev *indio_dev,
 		return IIO_VAL_INT;
 
 	case IIO_CHAN_INFO_SCALE:
-		*val = data->model_data->vref_fixed;
+		*val = data->vref;
 		*val2 = ASPEED_RESOLUTION_BITS;
 		return IIO_VAL_FRACTIONAL_LOG2;
 
@@ -187,6 +187,17 @@ static const struct iio_info aspeed_adc_iio_info = {
 	.debugfs_reg_access = aspeed_adc_reg_access,
 };
 
+static int aspeed_adc_vref_config(struct iio_dev *indio_dev)
+{
+	struct aspeed_adc_data *data = iio_priv(indio_dev);
+
+	if (data->model_data->vref_fixed) {
+		data->vref = data->model_data->vref_fixed;
+		return 0;
+	}
+	return 0;
+}
+
 static int aspeed_adc_probe(struct platform_device *pdev)
 {
 	struct iio_dev *indio_dev;
@@ -242,6 +253,10 @@ static int aspeed_adc_probe(struct platform_device *pdev)
 	}
 	reset_control_deassert(data->rst);
 
+	ret = aspeed_adc_vref_config(indio_dev);
+	if (ret)
+		goto vref_config_error;
+
 	if (data->model_data->wait_init_sequence) {
 		/* Enable engine in normal mode. */
 		writel(FIELD_PREP(ASPEED_ADC_OP_MODE,
@@ -290,6 +305,7 @@ static int aspeed_adc_probe(struct platform_device *pdev)
 	clk_disable_unprepare(data->clk_scaler->clk);
 clk_enable_error:
 poll_timeout_error:
+vref_config_error:
 	reset_control_assert(data->rst);
 reset_error:
 	clk_hw_unregister_divider(data->clk_scaler);
-- 
2.25.1


  parent reply	other threads:[~2021-08-23  7:04 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-23  7:02 [v4 00/15] Add support for ast2600 ADC Billy Tsai
2021-08-23  7:02 ` [v4 01/15] dt-bindings: iio: adc: Add ast2600-adc bindings Billy Tsai
2021-08-24 12:13   ` Rob Herring
2021-08-25  0:06     ` Billy Tsai
2021-08-29 14:53       ` Jonathan Cameron
2021-08-23  7:02 ` [v4 02/15] iio: adc: aspeed: completes the bitfield declare Billy Tsai
2021-08-23  7:02 ` [v4 03/15] iio: adc: aspeed: set driver data when adc probe Billy Tsai
2021-08-23  7:02 ` [v4 04/15] iio: adc: aspeed: Keep model data to driver data Billy Tsai
2021-08-23  7:02 ` [v4 05/15] iio: adc: aspeed: Refactory model data structure Billy Tsai
2021-08-23  7:02 ` Billy Tsai [this message]
2021-08-23  7:02 ` [v4 07/15] iio: adc: aspeed: Set num_channels with model data Billy Tsai
2021-08-23  7:02 ` [v4 08/15] iio: adc: aspeed: Use model_data to set clk scaler Billy Tsai
2021-08-23  7:02 ` [v4 09/15] iio: adc: aspeed: Use devm_add_action_or_reset Billy Tsai

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