linux-kernel - [PATCH v2 2/2] iio: frequency: adf4377: add adf4378 support

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Message-ID: <20240722134508.25234-2-antoniu.miclaus@analog.com>
Date: Mon, 22 Jul 2024 16:45:06 +0300
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich
	<Michael.Hennerich@...log.com>,
        Antoniu Miclaus <antoniu.miclaus@...log.com>,
        Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
        "Krzysztof Kozlowski" <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        "Dragos Bogdan" <dragos.bogdan@...log.com>,
        <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] iio: frequency: adf4377: add adf4378 support

Add separate handling for adf4378 within the driver.

The main difference between adf4377 and adf4378 is that adf4378 has only
one output which is handled by only one gpio.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
changes in v2:
 - use chip_info structure to handle new added part (adf4378)
 - use spi_get_device_match_data
 - drop redundant check in if statement.
 drivers/iio/frequency/adf4377.c | 36 ++++++++++++++++++++++++++-------
 1 file changed, 29 insertions(+), 7 deletions(-)

diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
index 9284c13f1abb..82374f5d2695 100644
--- a/drivers/iio/frequency/adf4377.c
+++ b/drivers/iio/frequency/adf4377.c
@@ -400,7 +400,13 @@ enum muxout_select_mode {
 	ADF4377_MUXOUT_HIGH = 0x8,
 };
 
+struct adf4377_chip_info {
+	const char *name;
+	bool has_gpio_enclk2;
+};
+
 struct adf4377_state {
+	const struct adf4377_chip_info	*chip_info;
 	struct spi_device	*spi;
 	struct regmap		*regmap;
 	struct clk		*clkin;
@@ -889,11 +895,13 @@ static int adf4377_properties_parse(struct adf4377_state *st)
 		return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk1),
 				     "failed to get the CE GPIO\n");
 
-	st->gpio_enclk2 = devm_gpiod_get_optional(&st->spi->dev, "clk2-enable",
-						  GPIOD_OUT_LOW);
-	if (IS_ERR(st->gpio_enclk2))
-		return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2),
-				     "failed to get the CE GPIO\n");
+	if (st->chip_info->has_gpio_enclk2) {
+		st->gpio_enclk2 = devm_gpiod_get_optional(&st->spi->dev, "clk2-enable",
+							  GPIOD_OUT_LOW);
+		if (IS_ERR(st->gpio_enclk2))
+			return dev_err_probe(&spi->dev, PTR_ERR(st->gpio_enclk2),
+					"failed to get the CE GPIO\n");
+	}
 
 	ret = device_property_match_property_string(&spi->dev, "adi,muxout-select",
 						    adf4377_muxout_modes,
@@ -921,6 +929,17 @@ static int adf4377_freq_change(struct notifier_block *nb, unsigned long action,
 	return NOTIFY_OK;
 }
 
+static const struct adf4377_chip_info adf4377_chip_info_tbl[] = {
+	{
+		.name = "adf4377",
+		.has_gpio_enclk2 = true,
+	},
+	{
+		.name = "adf4378",
+		.has_gpio_enclk2 = false,
+	},
+};
+
 static int adf4377_probe(struct spi_device *spi)
 {
 	struct iio_dev *indio_dev;
@@ -945,6 +964,7 @@ static int adf4377_probe(struct spi_device *spi)
 
 	st->regmap = regmap;
 	st->spi = spi;
+	st->chip_info = spi_get_device_match_data(spi);
 	mutex_init(&st->lock);
 
 	ret = adf4377_properties_parse(st);
@@ -964,13 +984,15 @@ static int adf4377_probe(struct spi_device *spi)
 }
 
 static const struct spi_device_id adf4377_id[] = {
-	{ "adf4377", 0 },
+	{ "adf4377", (kernel_ulong_t)&adf4377_chip_info_tbl[0] },
+	{ "adf4378", (kernel_ulong_t)&adf4377_chip_info_tbl[1] },
 	{}
 };
 MODULE_DEVICE_TABLE(spi, adf4377_id);
 
 static const struct of_device_id adf4377_of_match[] = {
-	{ .compatible = "adi,adf4377" },
+	{ .compatible = "adi,adf4377", .data = &adf4377_chip_info_tbl[0] },
+	{ .compatible = "adi,adf4378", .data = &adf4377_chip_info_tbl[1]},
 	{}
 };
 MODULE_DEVICE_TABLE(of, adf4377_of_match);
-- 
2.45.2