From f07458ad8f07cafff2e9ca791cb6b9bcd6eea36a Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Wed, 18 May 2011 14:42:30 +0100 Subject: [PATCH] staging:iio:adc: AD7780: Use private data space from iio_allocate_device + trivial fixes Use private data space from iio_allocate_device Drop dev_data in favour of iio_priv() Fix typo in gpio name Fix error return path, free gpio Make scale_uv type unsigned long Signed-off-by: Michael Hennerich Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/staging/iio/adc/ad7780.c | 80 ++++++++++++++------------------ 1 file changed, 36 insertions(+), 44 deletions(-) diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 14b16b5d4b1a..06d3b6aca544 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -40,7 +40,6 @@ struct ad7780_chip_info { }; struct ad7780_state { - struct iio_dev *indio_dev; struct spi_device *spi; const struct ad7780_chip_info *chip_info; struct regulator *reg; @@ -92,9 +91,10 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, int *val2, long m) { - int ret, smpl; - struct ad7780_state *st = indio_dev->dev_data; - unsigned int scale_uv; + struct ad7780_state *st = iio_priv(indio_dev); + struct iio_chan_spec channel = st->chip_info->channel; + int ret, smpl = 0; + unsigned long scale_uv; switch (m) { case 0: @@ -109,11 +109,9 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, !((smpl & AD7780_PAT0) && !(smpl & AD7780_PAT1))) return -EIO; - *val = (smpl >> st->chip_info->channel.scan_type.shift) & - ((1 << (st->chip_info->channel.scan_type.realbits)) - - 1); - *val -= (1 << (st->chip_info->channel.scan_type.realbits - - 1)); + *val = (smpl >> channel.scan_type.shift) & + ((1 << (channel.scan_type.realbits)) - 1); + *val -= (1 << (channel.scan_type.realbits - 1)); if (!(smpl & AD7780_GAIN)) *val *= 128; @@ -121,7 +119,7 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, return IIO_VAL_INT; case (1 << IIO_CHAN_INFO_SCALE_SHARED): scale_uv = (st->int_vref_mv * 100000) - >> (st->chip_info->channel.scan_type.realbits - 1); + >> (channel.scan_type.realbits - 1); *val = scale_uv / 100000; *val2 = (scale_uv % 100000) * 10; return IIO_VAL_INT_PLUS_MICRO; @@ -159,6 +157,7 @@ static int __devinit ad7780_probe(struct spi_device *spi) { struct ad7780_platform_data *pdata = spi->dev.platform_data; struct ad7780_state *st; + struct iio_dev *indio_dev; int ret, voltage_uv = 0; if (!pdata) { @@ -166,11 +165,11 @@ static int __devinit ad7780_probe(struct spi_device *spi) return -ENODEV; } - st = kzalloc(sizeof(*st), GFP_KERNEL); - if (st == NULL) { - ret = -ENOMEM; - goto error_ret; - } + indio_dev = iio_allocate_device(sizeof(*st)); + if (indio_dev == NULL) + return -ENOMEM; + + st = iio_priv(indio_dev); st->reg = regulator_get(&spi->dev, "vcc"); if (!IS_ERR(st->reg)) { @@ -193,24 +192,16 @@ static int __devinit ad7780_probe(struct spi_device *spi) else dev_warn(&spi->dev, "reference voltage unspecified\n"); - spi_set_drvdata(spi, st); + spi_set_drvdata(spi, indio_dev); st->spi = spi; - st->indio_dev = iio_allocate_device(0); - if (st->indio_dev == NULL) { - ret = -ENOMEM; - goto error_disable_reg; - } - - /* Establish that the iio_dev is a child of the spi device */ - st->indio_dev->dev.parent = &spi->dev; - st->indio_dev->name = spi_get_device_id(spi)->name; - st->indio_dev->dev_data = (void *)(st); - st->indio_dev->driver_module = THIS_MODULE; - st->indio_dev->modes = INDIO_DIRECT_MODE; - st->indio_dev->channels = &st->chip_info->channel; - st->indio_dev->num_channels = 1; - st->indio_dev->read_raw = &ad7780_read_raw; + indio_dev->dev.parent = &spi->dev; + indio_dev->name = spi_get_device_id(spi)->name; + indio_dev->driver_module = THIS_MODULE; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = &st->chip_info->channel; + indio_dev->num_channels = 1; + indio_dev->read_raw = &ad7780_read_raw; init_waitqueue_head(&st->wq_data_avail); @@ -223,20 +214,20 @@ static int __devinit ad7780_probe(struct spi_device *spi) spi_message_add_tail(&st->xfer, &st->msg); ret = gpio_request_one(st->pdata->gpio_pdrst, GPIOF_OUT_INIT_LOW, - "AD7877 /PDRST"); + "AD7780 /PDRST"); if (ret) { dev_err(&spi->dev, "failed to request GPIO PDRST\n"); - goto error_free_device; + goto error_disable_reg; } ret = request_irq(spi->irq, ad7780_interrupt, IRQF_TRIGGER_FALLING, spi_get_device_id(spi)->name, st); if (ret) - goto error_free_device; + goto error_free_gpio; disable_irq(spi->irq); - ret = iio_device_register(st->indio_dev); + ret = iio_device_register(indio_dev); if (ret) goto error_free_irq; @@ -244,32 +235,33 @@ static int __devinit ad7780_probe(struct spi_device *spi) error_free_irq: free_irq(spi->irq, st); - -error_free_device: - iio_free_device(st->indio_dev); +error_free_gpio: + gpio_free(st->pdata->gpio_pdrst); error_disable_reg: if (!IS_ERR(st->reg)) regulator_disable(st->reg); error_put_reg: if (!IS_ERR(st->reg)) regulator_put(st->reg); - kfree(st); -error_ret: + + iio_free_device(indio_dev); + return ret; } static int ad7780_remove(struct spi_device *spi) { - struct ad7780_state *st = spi_get_drvdata(spi); - struct iio_dev *indio_dev = st->indio_dev; + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct ad7780_state *st = iio_priv(indio_dev); + free_irq(spi->irq, st); gpio_free(st->pdata->gpio_pdrst); - iio_device_unregister(indio_dev); if (!IS_ERR(st->reg)) { regulator_disable(st->reg); regulator_put(st->reg); } - kfree(st); + iio_device_unregister(indio_dev); + return 0; } -- 2.20.1