[PATCH 7/8] iio: adc: ad7606: Switch to xxx_get_device_match_data

[Guillaume Stols <gstols@baylibre.com>]

On the parallel version, the current implementation is only compatible
with id tables and won't work with fx_nodes. So in this commit, the goal
is to switch to use get_device_match_data, in order to simplify the
logic of retrieving chip data.

Also, chip info is moved in the .h file so to be accessible to all the
driver files that can set a pointer to the corresponding chip as the
driver data.

Signed-off-by: Guillaume Stols <gstols@baylibre.com>
---
 drivers/iio/adc/ad7606.c     | 106 ++--------------------------------
 drivers/iio/adc/ad7606.h     | 132 ++++++++++++++++++++++++++++++++++++++++---
 drivers/iio/adc/ad7606_par.c |  22 ++++----
 drivers/iio/adc/ad7606_spi.c |  31 +++++-----
 4 files changed, 154 insertions(+), 137 deletions(-)

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 2c9ddcd0ad77..99d5ca5c2348 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -43,14 +43,6 @@ static const unsigned int ad7616_sw_scale_avail[3] = {
 	76293, 152588, 305176
 };
 
-static const unsigned int ad7606_oversampling_avail[7] = {
-	1, 2, 4, 8, 16, 32, 64,
-};
-
-static const unsigned int ad7616_oversampling_avail[8] = {
-	1, 2, 4, 8, 16, 32, 64, 128,
-};
-
 static int ad7606_reset(struct ad7606_state *st)
 {
 	if (st->gpio_reset) {
@@ -415,96 +407,6 @@ static const struct attribute_group ad7606_attribute_group_range = {
 	.attrs = ad7606_attributes_range,
 };
 
-static const struct iio_chan_spec ad7605_channels[] = {
-	IIO_CHAN_SOFT_TIMESTAMP(4),
-	AD7605_CHANNEL(0),
-	AD7605_CHANNEL(1),
-	AD7605_CHANNEL(2),
-	AD7605_CHANNEL(3),
-};
-
-static const struct iio_chan_spec ad7606_channels[] = {
-	IIO_CHAN_SOFT_TIMESTAMP(8),
-	AD7606_CHANNEL(0),
-	AD7606_CHANNEL(1),
-	AD7606_CHANNEL(2),
-	AD7606_CHANNEL(3),
-	AD7606_CHANNEL(4),
-	AD7606_CHANNEL(5),
-	AD7606_CHANNEL(6),
-	AD7606_CHANNEL(7),
-};
-
-/*
- * The current assumption that this driver makes for AD7616, is that it's
- * working in Hardware Mode with Serial, Burst and Sequencer modes activated.
- * To activate them, following pins must be pulled high:
- *	-SER/PAR
- *	-SEQEN
- * And following pins must be pulled low:
- *	-WR/BURST
- *	-DB4/SER1W
- */
-static const struct iio_chan_spec ad7616_channels[] = {
-	IIO_CHAN_SOFT_TIMESTAMP(16),
-	AD7606_CHANNEL(0),
-	AD7606_CHANNEL(1),
-	AD7606_CHANNEL(2),
-	AD7606_CHANNEL(3),
-	AD7606_CHANNEL(4),
-	AD7606_CHANNEL(5),
-	AD7606_CHANNEL(6),
-	AD7606_CHANNEL(7),
-	AD7606_CHANNEL(8),
-	AD7606_CHANNEL(9),
-	AD7606_CHANNEL(10),
-	AD7606_CHANNEL(11),
-	AD7606_CHANNEL(12),
-	AD7606_CHANNEL(13),
-	AD7606_CHANNEL(14),
-	AD7606_CHANNEL(15),
-};
-
-static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
-	/* More devices added in future */
-	[ID_AD7605_4] = {
-		.channels = ad7605_channels,
-		.num_channels = 5,
-	},
-	[ID_AD7606_8] = {
-		.channels = ad7606_channels,
-		.num_channels = 9,
-		.oversampling_avail = ad7606_oversampling_avail,
-		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
-	},
-	[ID_AD7606_6] = {
-		.channels = ad7606_channels,
-		.num_channels = 7,
-		.oversampling_avail = ad7606_oversampling_avail,
-		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
-	},
-	[ID_AD7606_4] = {
-		.channels = ad7606_channels,
-		.num_channels = 5,
-		.oversampling_avail = ad7606_oversampling_avail,
-		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
-	},
-	[ID_AD7606B] = {
-		.channels = ad7606_channels,
-		.num_channels = 9,
-		.oversampling_avail = ad7606_oversampling_avail,
-		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
-	},
-	[ID_AD7616] = {
-		.channels = ad7616_channels,
-		.num_channels = 17,
-		.oversampling_avail = ad7616_oversampling_avail,
-		.oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail),
-		.os_req_reset = true,
-		.init_delay_ms = 15,
-	},
-};
-
 static int ad7606_request_gpios(struct ad7606_state *st)
 {
 	struct device *dev = st->dev;
@@ -644,7 +546,7 @@ static void ad7606_pwm_disable(void *data)
 }
 
 int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
-		 const char *name, unsigned int id,
+		 const struct ad7606_chip_info *chip_info,
 		 const struct ad7606_bus_ops *bops)
 {
 	struct ad7606_state *st;
@@ -673,7 +575,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 		return dev_err_probe(dev, ret,
 				     "Failed to enable specified AVcc supply\n");
 
-	st->chip_info = &ad7606_chip_info_tbl[id];
+	st->chip_info = chip_info;
 
 	if (st->chip_info->oversampling_num) {
 		st->oversampling_avail = st->chip_info->oversampling_avail;
@@ -696,7 +598,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 			indio_dev->info = &ad7606_info_no_os_or_range;
 	}
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->name = name;
+	indio_dev->name = chip_info->name;
 	indio_dev->channels = st->chip_info->channels;
 	indio_dev->num_channels = st->chip_info->num_channels;
 
@@ -773,7 +675,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 					NULL,
 					&ad7606_interrupt,
 					IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-					name, indio_dev);
+					chip_info->name, indio_dev);
 	if (ret)
 		return ret;
 
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
index 60bac1894a91..aab8fefb84be 100644
--- a/drivers/iio/adc/ad7606.h
+++ b/drivers/iio/adc/ad7606.h
@@ -40,8 +40,19 @@
 
 struct pwm_device		*cnvst_pwm;
 
+enum ad7606_supported_device_ids {
+	ID_AD7605_4,
+	ID_AD7606_8,
+	ID_AD7606_6,
+	ID_AD7606_4,
+	ID_AD7606B,
+	ID_AD7616,
+};
+
 /**
  * struct ad7606_chip_info - chip specific information
+ * @name		device name
+ * @id			device id
  * @channels:		channel specification
  * @num_channels:	number of channels
  * @oversampling_avail	pointer to the array which stores the available
@@ -52,6 +63,8 @@ struct pwm_device		*cnvst_pwm;
  *			after a restart
  */
 struct ad7606_chip_info {
+	enum ad7606_supported_device_ids id;
+	const char			*name;
 	const struct iio_chan_spec	*channels;
 	unsigned int			num_channels;
 	const unsigned int		*oversampling_avail;
@@ -151,16 +164,119 @@ struct ad7606_bus_ops {
 };
 
 int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
-		 const char *name, unsigned int id,
+		 const struct ad7606_chip_info *info,
 		 const struct ad7606_bus_ops *bops);
 
-enum ad7606_supported_device_ids {
-	ID_AD7605_4,
-	ID_AD7606_8,
-	ID_AD7606_6,
-	ID_AD7606_4,
-	ID_AD7606B,
-	ID_AD7616,
+static const unsigned int ad7606_oversampling_avail[7] = {
+	1, 2, 4, 8, 16, 32, 64,
+};
+
+static const unsigned int ad7616_oversampling_avail[8] = {
+	1, 2, 4, 8, 16, 32, 64, 128,
+};
+
+static const struct iio_chan_spec ad7605_channels[] = {
+	IIO_CHAN_SOFT_TIMESTAMP(4),
+	AD7605_CHANNEL(0),
+	AD7605_CHANNEL(1),
+	AD7605_CHANNEL(2),
+	AD7605_CHANNEL(3),
+};
+
+static const struct iio_chan_spec ad7606_channels[] = {
+	IIO_CHAN_SOFT_TIMESTAMP(8),
+	AD7606_CHANNEL(0),
+	AD7606_CHANNEL(1),
+	AD7606_CHANNEL(2),
+	AD7606_CHANNEL(3),
+	AD7606_CHANNEL(4),
+	AD7606_CHANNEL(5),
+	AD7606_CHANNEL(6),
+	AD7606_CHANNEL(7),
+};
+
+/*
+ * The current assumption that this driver makes for AD7616, is that it's
+ * working in Hardware Mode with Serial, Burst and Sequencer modes activated.
+ * To activate them, following pins must be pulled high:
+ *	-SER/PAR
+ *	-SEQEN
+ * And following pins must be pulled low:
+ *	-WR/BURST
+ *	-DB4/SER1W
+ */
+static const struct iio_chan_spec ad7616_channels[] = {
+	IIO_CHAN_SOFT_TIMESTAMP(16),
+	AD7606_CHANNEL(0),
+	AD7606_CHANNEL(1),
+	AD7606_CHANNEL(2),
+	AD7606_CHANNEL(3),
+	AD7606_CHANNEL(4),
+	AD7606_CHANNEL(5),
+	AD7606_CHANNEL(6),
+	AD7606_CHANNEL(7),
+	AD7606_CHANNEL(8),
+	AD7606_CHANNEL(9),
+	AD7606_CHANNEL(10),
+	AD7606_CHANNEL(11),
+	AD7606_CHANNEL(12),
+	AD7606_CHANNEL(13),
+	AD7606_CHANNEL(14),
+	AD7606_CHANNEL(15),
+};
+
+static const struct ad7606_chip_info ad7605_4_info = {
+	.channels = ad7605_channels,
+	.num_channels = 5,
+	.name = "ad7605-4",
+	.id = ID_AD7605_4,
+};
+
+static const struct ad7606_chip_info ad7606_8_info = {
+	.channels = ad7606_channels,
+	.num_channels = 9,
+	.oversampling_avail = ad7606_oversampling_avail,
+	.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
+	.name = "ad7606-8",
+	.id = ID_AD7606_8,
+};
+
+static const struct ad7606_chip_info ad7606_6_info = {
+	.channels = ad7606_channels,
+	.num_channels = 7,
+	.oversampling_avail = ad7606_oversampling_avail,
+	.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
+	.name = "ad7606-6",
+	.id = ID_AD7606_6,
+};
+
+static const struct ad7606_chip_info ad7606_4_info = {
+	.channels = ad7606_channels,
+	.num_channels = 5,
+	.oversampling_avail = ad7606_oversampling_avail,
+	.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
+	.name = "ad7606-4",
+	.id = ID_AD7606_4,
+};
+
+static const struct ad7606_chip_info ad7606b_info = {
+	.channels = ad7606_channels,
+	.num_channels = 9,
+	.oversampling_avail = ad7606_oversampling_avail,
+	.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
+	.name = "ad7606B",
+	.id = ID_AD7606B,
+};
+
+static const struct ad7606_chip_info ad7616_info = {
+	.channels = ad7616_channels,
+	.num_channels = 17,
+	.oversampling_avail = ad7616_oversampling_avail,
+	.oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail),
+	.os_req_reset = true,
+	.init_delay_ms = 15,
+	.name = "ad7616",
+	.id = ID_AD7616,
 };
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/iio/adc/ad7606_par.c b/drivers/iio/adc/ad7606_par.c
index d8408052262e..d83c0edc1e31 100644
--- a/drivers/iio/adc/ad7606_par.c
+++ b/drivers/iio/adc/ad7606_par.c
@@ -47,7 +47,7 @@ static const struct ad7606_bus_ops ad7606_par8_bops = {
 
 static int ad7606_par_probe(struct platform_device *pdev)
 {
-	const struct platform_device_id *id = platform_get_device_id(pdev);
+	const struct ad7606_chip_info *chip_info = platform_get_device_match_data(pdev);
 	struct resource *res;
 	void __iomem *addr;
 	resource_size_t remap_size;
@@ -64,26 +64,26 @@ static int ad7606_par_probe(struct platform_device *pdev)
 	remap_size = resource_size(res);
 
 	return ad7606_probe(&pdev->dev, irq, addr,
-			    id->name, id->driver_data,
+			    chip_info,
 			    remap_size > 1 ? &ad7606_par16_bops :
 			    &ad7606_par8_bops);
 }
 
 static const struct platform_device_id ad7606_driver_ids[] = {
-	{ .name	= "ad7605-4", .driver_data = ID_AD7605_4, },
-	{ .name	= "ad7606-4", .driver_data = ID_AD7606_4, },
-	{ .name	= "ad7606-6", .driver_data = ID_AD7606_6, },
-	{ .name	= "ad7606-8", .driver_data = ID_AD7606_8, },
+	{ .name	= "ad7605-4", .driver_data = (kernel_ulong_t)&ad7605_4_info, },
+	{ .name	= "ad7606-4", .driver_data = (kernel_ulong_t)&ad7606_4_info, },
+	{ .name	= "ad7606-6", .driver_data = (kernel_ulong_t)&ad7606_6_info, },
+	{ .name	= "ad7606-8", .driver_data = (kernel_ulong_t)&ad7606_8_info, },
 	{ }
 };
 MODULE_DEVICE_TABLE(platform, ad7606_driver_ids);
 
 static const struct of_device_id ad7606_of_match[] = {
-	{ .compatible = "adi,ad7605-4" },
-	{ .compatible = "adi,ad7606-4" },
-	{ .compatible = "adi,ad7606-6" },
-	{ .compatible = "adi,ad7606-8" },
-	{ },
+	{ .compatible = "adi,ad7605-4", .data = &ad7605_4_info },
+	{ .compatible = "adi,ad7606-4", .data = &ad7606_4_info },
+	{ .compatible = "adi,ad7606-6", .data = &ad7606_6_info },
+	{ .compatible = "adi,ad7606-8", .data = &ad7606_8_info },
+	{ }
 };
 MODULE_DEVICE_TABLE(of, ad7606_of_match);
 
diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
index 287a0591533b..c23a7448f851 100644
--- a/drivers/iio/adc/ad7606_spi.c
+++ b/drivers/iio/adc/ad7606_spi.c
@@ -307,10 +307,10 @@ static const struct ad7606_bus_ops ad7606B_spi_bops = {
 
 static int ad7606_spi_probe(struct spi_device *spi)
 {
-	const struct spi_device_id *id = spi_get_device_id(spi);
+	const struct ad7606_chip_info *chip_info = spi_get_device_match_data(spi);
 	const struct ad7606_bus_ops *bops;
 
-	switch (id->driver_data) {
+	switch (chip_info->id) {
 	case ID_AD7616:
 		bops = &ad7616_spi_bops;
 		break;
@@ -323,28 +323,27 @@ static int ad7606_spi_probe(struct spi_device *spi)
 	}
 
 	return ad7606_probe(&spi->dev, spi->irq, NULL,
-			    id->name, id->driver_data,
-			    bops);
+			    chip_info, bops);
 }
 
 static const struct spi_device_id ad7606_id_table[] = {
-	{ "ad7605-4", ID_AD7605_4 },
-	{ "ad7606-4", ID_AD7606_4 },
-	{ "ad7606-6", ID_AD7606_6 },
-	{ "ad7606-8", ID_AD7606_8 },
-	{ "ad7606b",  ID_AD7606B },
-	{ "ad7616",   ID_AD7616 },
+	{ "ad7605-4", (kernel_ulong_t)&ad7605_4_info },
+	{ "ad7606-4", (kernel_ulong_t)&ad7606_4_info },
+	{ "ad7606-6", (kernel_ulong_t)&ad7606_6_info },
+	{ "ad7606-8", (kernel_ulong_t)&ad7606_8_info },
+	{ "ad7606b",  (kernel_ulong_t)&ad7606b_info },
+	{ "ad7616",   (kernel_ulong_t)&ad7616_info },
 	{}
 };
 MODULE_DEVICE_TABLE(spi, ad7606_id_table);
 
 static const struct of_device_id ad7606_of_match[] = {
-	{ .compatible = "adi,ad7605-4" },
-	{ .compatible = "adi,ad7606-4" },
-	{ .compatible = "adi,ad7606-6" },
-	{ .compatible = "adi,ad7606-8" },
-	{ .compatible = "adi,ad7606b" },
-	{ .compatible = "adi,ad7616" },
+	{ .compatible = "adi,ad7605-4", &ad7605_4_info },
+	{ .compatible = "adi,ad7606-4", &ad7606_4_info },
+	{ .compatible = "adi,ad7606-6", &ad7606_6_info },
+	{ .compatible = "adi,ad7606-8", &ad7606_8_info },
+	{ .compatible = "adi,ad7606b", &ad7606b_info },
+	{ .compatible = "adi,ad7616", &ad7616_info },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ad7606_of_match);

-- 
2.34.1