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iio: adc: ad7192: convert to device-managed functions

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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@deviqon.com>
Link: https://lore.kernel.org/r/20210513120752.90074-11-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Ardelean 2021-05-13 15:07:50 +03:00 committed by Jonathan Cameron
parent c9ec2cb328
commit bd5dcdeb3f
1 changed files with 36 additions and 53 deletions
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89
drivers/iio/adc/ad7192.c
View file

@ -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;
@ -937,33 +947,38 @@ 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;
ret = regulator_get_voltage(st->avdd);
if (ret < 0) {
dev_err(&spi->dev, "Device tree error, reference voltage undefined\n");
goto error_disable_avdd;
return ret;
}
st->int_vref_mv = ret / 1000;
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;
@ -972,17 +987,15 @@ 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);
@ -990,55 +1003,26 @@ 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;
return ret;
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 0;
return devm_iio_device_register(&spi->dev, indio_dev);
}
static const struct of_device_id ad7192_of_match[] = {
@ -1056,7 +1040,6 @@ static struct spi_driver ad7192_driver = {
.of_match_table = ad7192_of_match,
},
.probe = ad7192_probe,
.remove = ad7192_remove,
};
module_spi_driver(ad7192_driver);