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Date: Mon, 10 May 2021 15:55:19 +0300
From: Alexandru Ardelean <aardelean@...iqon.com>
To: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: jic23@...nel.org, Jonathan.Cameron@...wei.com,
alexandru.tachici@...log.com, linux@...iqon.com,
Alexandru Ardelean <aardelean@...iqon.com>
Subject: [PATCH 07/11] iio: adc: ad7192: convert to device-managed functions
With the devm_ad_sd_setup_buffer_and_trigger() helper, it's a bit easier
now to convert the probe of the AD7192 driver to use device-managed
functions.
The regulators and the mclk requires devm_add_action_or_reset() callbacks
though.
Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
---
drivers/iio/adc/ad7192.c | 90 ++++++++++++++++------------------------
1 file changed, 36 insertions(+), 54 deletions(-)
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 5b3c46213bd4..b3fa1b5764e9 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -908,6 +908,16 @@ static int ad7192_channels_config(struct iio_dev *indio_dev)
return 0;
}
+static void ad7192_reg_disable(void *reg)
+{
+ regulator_disable(reg);
+}
+
+static void ad7192_clk_disable(void *clk)
+{
+ clk_disable_unprepare(clk);
+}
+
static int ad7192_probe(struct spi_device *spi)
{
struct ad7192_state *st;
@@ -937,36 +947,40 @@ static int ad7192_probe(struct spi_device *spi)
return ret;
}
+ ret = devm_add_action_or_reset(&spi->dev, ad7192_reg_disable, st->avdd);
+ if (ret)
+ return ret;
+
st->dvdd = devm_regulator_get(&spi->dev, "dvdd");
- if (IS_ERR(st->dvdd)) {
- ret = PTR_ERR(st->dvdd);
- goto error_disable_avdd;
- }
+ if (IS_ERR(st->dvdd))
+ return PTR_ERR(st->dvdd);
ret = regulator_enable(st->dvdd);
if (ret) {
dev_err(&spi->dev, "Failed to enable specified DVdd supply\n");
- goto error_disable_avdd;
+ return ret;
}
+ ret = devm_add_action_or_reset(&spi->dev, ad7192_reg_disable, st->dvdd);
+ if (ret)
+ return ret;
+
voltage_uv = regulator_get_voltage(st->avdd);
if (voltage_uv > 0) {
st->int_vref_mv = voltage_uv / 1000;
} else {
- ret = voltage_uv;
dev_err(&spi->dev, "Device tree error, reference voltage undefined\n");
- goto error_disable_avdd;
+ return voltage_uv;
}
- spi_set_drvdata(spi, indio_dev);
st->chip_info = of_device_get_match_data(&spi->dev);
indio_dev->name = st->chip_info->name;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = ad7192_channels_config(indio_dev);
if (ret < 0)
- goto error_disable_dvdd;
+ return ret;
if (st->chip_info->chip_id == CHIPID_AD7195)
indio_dev->info = &ad7195_info;
@@ -975,17 +989,15 @@ static int ad7192_probe(struct spi_device *spi)
ad_sd_init(&st->sd, indio_dev, spi, &ad7192_sigma_delta_info);
- ret = ad_sd_setup_buffer_and_trigger(indio_dev);
+ ret = devm_ad_sd_setup_buffer_and_trigger(&spi->dev, indio_dev);
if (ret)
- goto error_disable_dvdd;
+ return ret;
st->fclk = AD7192_INT_FREQ_MHZ;
st->mclk = devm_clk_get_optional(&spi->dev, "mclk");
- if (IS_ERR(st->mclk)) {
- ret = PTR_ERR(st->mclk);
- goto error_remove_trigger;
- }
+ if (IS_ERR(st->mclk))
+ return PTR_ERR(st->mclk);
st->clock_sel = ad7192_of_clock_select(st);
@@ -993,55 +1005,26 @@ static int ad7192_probe(struct spi_device *spi)
st->clock_sel == AD7192_CLK_EXT_MCLK2) {
ret = clk_prepare_enable(st->mclk);
if (ret < 0)
- goto error_remove_trigger;
+ return ret;
+
+ ret = devm_add_action_or_reset(&spi->dev, ad7192_clk_disable,
+ st->mclk);
+ if (ret)
+ return ret;
st->fclk = clk_get_rate(st->mclk);
if (!ad7192_valid_external_frequency(st->fclk)) {
- ret = -EINVAL;
dev_err(&spi->dev,
"External clock frequency out of bounds\n");
- goto error_disable_clk;
+ return -EINVAL;
}
}
ret = ad7192_setup(st, spi->dev.of_node);
if (ret)
- goto error_disable_clk;
-
- ret = iio_device_register(indio_dev);
- if (ret < 0)
- goto error_disable_clk;
- return 0;
-
-error_disable_clk:
- if (st->clock_sel == AD7192_CLK_EXT_MCLK1_2 ||
- st->clock_sel == AD7192_CLK_EXT_MCLK2)
- clk_disable_unprepare(st->mclk);
-error_remove_trigger:
- ad_sd_cleanup_buffer_and_trigger(indio_dev);
-error_disable_dvdd:
- regulator_disable(st->dvdd);
-error_disable_avdd:
- regulator_disable(st->avdd);
-
- return ret;
-}
-
-static int ad7192_remove(struct spi_device *spi)
-{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
- struct ad7192_state *st = iio_priv(indio_dev);
-
- iio_device_unregister(indio_dev);
- if (st->clock_sel == AD7192_CLK_EXT_MCLK1_2 ||
- st->clock_sel == AD7192_CLK_EXT_MCLK2)
- clk_disable_unprepare(st->mclk);
- ad_sd_cleanup_buffer_and_trigger(indio_dev);
-
- regulator_disable(st->dvdd);
- regulator_disable(st->avdd);
+ return ret;
- return 0;
+ return devm_iio_device_register(&spi->dev, indio_dev);
}
static const struct of_device_id ad7192_of_match[] = {
@@ -1059,7 +1042,6 @@ static struct spi_driver ad7192_driver = {
.of_match_table = ad7192_of_match,
},
.probe = ad7192_probe,
- .remove = ad7192_remove,
};
module_spi_driver(ad7192_driver);
--
2.31.1
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