linux-kernel - [PATCH 1/5] iio: gyro: adi16136: construct adis data on probe vs static on driver

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Message-ID: <20191213160312.1834-1-alexandru.ardelean@analog.com>
Date:   Fri, 13 Dec 2019 18:03:08 +0200
From:   Alexandru Ardelean <alexandru.ardelean@...log.com>
To:     <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <jic23@...nel.org>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Nuno Sá <nuno.sa@...log.com>
Subject: [PATCH 1/5] iio: gyro: adi16136: construct adis data on probe vs static on driver

This change is done in preparation of adding an `struct adis_timeout` type.
Some ADIS drivers support multiple drivers, with various combinations of
timeouts. Creating static tables for each driver is possible, but that also
creates quite a lot of duplication.

Signed-off-by: Nuno Sá <nuno.sa@...log.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
 drivers/iio/gyro/adis16136.c | 49 ++++++++++++++++++++++--------------
 1 file changed, 30 insertions(+), 19 deletions(-)

diff --git a/drivers/iio/gyro/adis16136.c b/drivers/iio/gyro/adis16136.c
index f10c4f173898..129de2bd5845 100644
--- a/drivers/iio/gyro/adis16136.c
+++ b/drivers/iio/gyro/adis16136.c
@@ -465,24 +465,6 @@ static const char * const adis16136_status_error_msgs[] = {
 	[ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL] = "Flash checksum error",
 };
 
-static const struct adis_data adis16136_data = {
-	.diag_stat_reg = ADIS16136_REG_DIAG_STAT,
-	.glob_cmd_reg = ADIS16136_REG_GLOB_CMD,
-	.msc_ctrl_reg = ADIS16136_REG_MSC_CTRL,
-
-	.self_test_mask = ADIS16136_MSC_CTRL_SELF_TEST,
-	.startup_delay = 80,
-
-	.read_delay = 10,
-	.write_delay = 10,
-
-	.status_error_msgs = adis16136_status_error_msgs,
-	.status_error_mask = BIT(ADIS16136_DIAG_STAT_FLASH_UPDATE_FAIL) |
-		BIT(ADIS16136_DIAG_STAT_SPI_FAIL) |
-		BIT(ADIS16136_DIAG_STAT_SELF_TEST_FAIL) |
-		BIT(ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL),
-};
-
 enum adis16136_id {
 	ID_ADIS16133,
 	ID_ADIS16135,
@@ -509,11 +491,36 @@ static const struct adis16136_chip_info adis16136_chip_info[] = {
 	},
 };
 
+static struct adis_data *adis16136_adis_data_alloc(struct adis16136 *st,
+						   struct device *dev)
+{
+	struct adis_data *data;
+
+	data = devm_kzalloc(dev, sizeof(struct adis_data), GFP_KERNEL);
+	if (!data)
+		return ERR_PTR(-ENOMEM);
+
+	data->msc_ctrl_reg = ADIS16136_REG_MSC_CTRL;
+	data->glob_cmd_reg = ADIS16136_REG_GLOB_CMD;
+	data->diag_stat_reg = ADIS16136_REG_DIAG_STAT;
+	data->self_test_mask = ADIS16136_MSC_CTRL_SELF_TEST;
+	data->read_delay = 10;
+	data->write_delay = 10;
+	data->status_error_msgs = adis16136_status_error_msgs;
+	data->status_error_mask = BIT(ADIS16136_DIAG_STAT_FLASH_UPDATE_FAIL) |
+				BIT(ADIS16136_DIAG_STAT_SPI_FAIL) |
+				BIT(ADIS16136_DIAG_STAT_SELF_TEST_FAIL) |
+				BIT(ADIS16136_DIAG_STAT_FLASH_CHKSUM_FAIL);
+
+	return data;
+}
+
 static int adis16136_probe(struct spi_device *spi)
 {
 	const struct spi_device_id *id = spi_get_device_id(spi);
 	struct adis16136 *adis16136;
 	struct iio_dev *indio_dev;
+	const struct adis_data *adis16136_data;
 	int ret;
 
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adis16136));
@@ -532,7 +539,11 @@ static int adis16136_probe(struct spi_device *spi)
 	indio_dev->info = &adis16136_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	ret = adis_init(&adis16136->adis, indio_dev, spi, &adis16136_data);
+	adis16136_data = adis16136_adis_data_alloc(adis16136, &spi->dev);
+	if (IS_ERR(adis16136_data))
+		return PTR_ERR(adis16136_data);
+
+	ret = adis_init(&adis16136->adis, indio_dev, spi, adis16136_data);
 	if (ret)
 		return ret;
 
-- 
2.20.1