linux-kernel - [PATCH 2/2] iio: adc: vf610_adc: limit i.MX6SX's channel number to 4

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Message-Id: <20241104231200.2745342-2-Frank.Li@nxp.com>
Date: Mon,  4 Nov 2024 18:12:00 -0500
From: Frank Li <Frank.Li@....com>
To: Haibo Chen <haibo.chen@....com>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	linux-iio@...r.kernel.org (open list:NXP i.MX 7D/6SX/6UL/93 AND VF610 ADC DRIVER),
	imx@...ts.linux.dev (open list:NXP i.MX 7D/6SX/6UL/93 AND VF610 ADC DRIVER),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] iio: adc: vf610_adc: limit i.MX6SX's channel number to 4

i.MX6SX only has 4 ADC channels, so limit channel numbers to 4 for
compatible string 'fsl,imx6sx-adc'.

Signed-off-by: Frank Li <Frank.Li@....com>
---
compatible string 'fsl,imx6sx-adc' already document in
Documentation/devicetree/bindings/iio/adc/fsl,vf610-adc.yaml
---
 drivers/iio/adc/vf610_adc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index 4e737b193c012..84573cdfce5da 100644
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -809,7 +809,8 @@ static const struct iio_info vf610_adc_iio_info = {
 };
 
 static const struct of_device_id vf610_adc_match[] = {
-	{ .compatible = "fsl,vf610-adc", },
+	{ .compatible = "fsl,imx6sx-adc", .data = (void *)4},
+	{ .compatible = "fsl,vf610-adc", .data = (void *)ARRAY_SIZE(vf610_adc_iio_channels)},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, vf610_adc_match);
@@ -870,7 +871,7 @@ static int vf610_adc_probe(struct platform_device *pdev)
 	indio_dev->info = &vf610_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = vf610_adc_iio_channels;
-	indio_dev->num_channels = ARRAY_SIZE(vf610_adc_iio_channels);
+	indio_dev->num_channels = (u32)device_get_match_data(dev);
 
 	vf610_adc_cfg_init(info);
 	vf610_adc_hw_init(info);
-- 
2.34.1