From c336b611e9e48304589303b580292dd1bf6d4eb3 Mon Sep 17 00:00:00 2001 From: Alexandru Ardelean Date: Fri, 25 Jun 2021 17:01:36 +0300 Subject: iio: accel: bma220: convert probe to device-managed functions This change converts the driver to use devm_iio_triggered_buffer_setup() and devm_iio_device_register() for initializing and registering the IIO device. The bma220_deinit() is converted into a callback for a devm_add_action_or_reset() hook, so that the device is put in stand-by when the driver gets uninitialized. The return value of the bma220_deinit() function isn't used as it does not add any value. On the error path of the probe function, this can just override the actual error with -EBUSY, or can even return 0 (no error), on the error path. Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20210625140137.362282-1-aardelean@deviqon.com Signed-off-by: Jonathan Cameron --- drivers/iio/accel/bma220_spi.c | 44 +++++++++++------------------------------- 1 file changed, 11 insertions(+), 33 deletions(-) (limited to 'drivers') diff --git a/drivers/iio/accel/bma220_spi.c b/drivers/iio/accel/bma220_spi.c index 0622c7936499..0095931a11f8 100644 --- a/drivers/iio/accel/bma220_spi.c +++ b/drivers/iio/accel/bma220_spi.c @@ -218,20 +218,14 @@ static int bma220_init(struct spi_device *spi) return 0; } -static int bma220_deinit(struct spi_device *spi) +static void bma220_deinit(void *spi) { int ret; /* Make sure the chip is powered off */ ret = bma220_read_reg(spi, BMA220_REG_SUSPEND); if (ret == BMA220_SUSPEND_SLEEP) - ret = bma220_read_reg(spi, BMA220_REG_SUSPEND); - if (ret < 0) - return ret; - if (ret == BMA220_SUSPEND_SLEEP) - return -EBUSY; - - return 0; + bma220_read_reg(spi, BMA220_REG_SUSPEND); } static int bma220_probe(struct spi_device *spi) @@ -262,34 +256,19 @@ static int bma220_probe(struct spi_device *spi) if (ret) return ret; - ret = iio_triggered_buffer_setup(indio_dev, iio_pollfunc_store_time, - bma220_trigger_handler, NULL); - if (ret < 0) { - dev_err(&spi->dev, "iio triggered buffer setup failed\n"); - goto err_suspend; - } + ret = devm_add_action_or_reset(&spi->dev, bma220_deinit, spi); + if (ret) + return ret; - ret = iio_device_register(indio_dev); + ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, + iio_pollfunc_store_time, + bma220_trigger_handler, NULL); if (ret < 0) { - dev_err(&spi->dev, "iio_device_register failed\n"); - iio_triggered_buffer_cleanup(indio_dev); - goto err_suspend; + dev_err(&spi->dev, "iio triggered buffer setup failed\n"); + return ret; } - return 0; - -err_suspend: - return bma220_deinit(spi); -} - -static int bma220_remove(struct spi_device *spi) -{ - struct iio_dev *indio_dev = spi_get_drvdata(spi); - - iio_device_unregister(indio_dev); - iio_triggered_buffer_cleanup(indio_dev); - - return bma220_deinit(spi); + return devm_iio_device_register(&spi->dev, indio_dev); } static __maybe_unused int bma220_suspend(struct device *dev) @@ -326,7 +305,6 @@ static struct spi_driver bma220_driver = { .acpi_match_table = bma220_acpi_id, }, .probe = bma220_probe, - .remove = bma220_remove, .id_table = bma220_spi_id, }; module_spi_driver(bma220_driver); -- cgit v1.2.3