From: Jonathan Cameron Date: Mon, 27 Jun 2011 12:07:26 +0000 (+0100) Subject: staging:iio:adc:ad7816: allocate chip state with iio_dev and use iio_priv to access. X-Git-Tag: next-20110726~5^2~474 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b0011d6dbae18af3e4bc52670e542abc688eb5a2;p=karo-tx-linux.git staging:iio:adc:ad7816: allocate chip state with iio_dev and use iio_priv to access. Again, get rid of unwanted iio_dev pointer in state. Signed-off-by: Jonathan Cameron Acked-by: Michael Hennerich Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/iio/adc/ad7816.c b/drivers/staging/iio/adc/ad7816.c index 11379e469b07..0c84217bde3d 100644 --- a/drivers/staging/iio/adc/ad7816.c +++ b/drivers/staging/iio/adc/ad7816.c @@ -43,7 +43,6 @@ struct ad7816_chip_info { struct spi_device *spi_dev; - struct iio_dev *indio_dev; u16 rdwr_pin; u16 convert_pin; u16 busy_pin; @@ -113,7 +112,7 @@ static ssize_t ad7816_show_mode(struct device *dev, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); if (chip->mode) return sprintf(buf, "power-save\n"); @@ -127,7 +126,7 @@ static ssize_t ad7816_store_mode(struct device *dev, size_t len) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); if (strcmp(buf, "full")) { gpio_set_value(chip->rdwr_pin, 1); @@ -159,7 +158,7 @@ static ssize_t ad7816_show_channel(struct device *dev, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); return sprintf(buf, "%d\n", chip->channel_id); } @@ -170,7 +169,7 @@ static ssize_t ad7816_store_channel(struct device *dev, size_t len) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); unsigned long data; int ret; @@ -208,7 +207,7 @@ static ssize_t ad7816_show_value(struct device *dev, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); u16 data; s8 value; int ret; @@ -265,7 +264,7 @@ static ssize_t ad7816_show_oti(struct device *dev, char *buf) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); int value; if (chip->channel_id > AD7816_CS_MAX) { @@ -286,7 +285,7 @@ static inline ssize_t ad7816_set_oti(struct device *dev, size_t len) { struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7816_chip_info *chip = dev_info->dev_data; + struct ad7816_chip_info *chip = iio_priv(dev_info); long value; u8 data; int ret; @@ -345,6 +344,7 @@ static const struct iio_info ad7816_info = { static int __devinit ad7816_probe(struct spi_device *spi_dev) { struct ad7816_chip_info *chip; + struct iio_dev *indio_dev; unsigned short *pins = spi_dev->dev.platform_data; int ret = 0; int i; @@ -354,13 +354,14 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev) return -EINVAL; } - chip = kzalloc(sizeof(struct ad7816_chip_info), GFP_KERNEL); - - if (chip == NULL) - return -ENOMEM; - + indio_dev = iio_allocate_device(sizeof(*chip)); + if (indio_dev == NULL) { + ret = -ENOMEM; + goto error_ret; + } + chip = iio_priv(indio_dev); /* this is only used for device removal purposes */ - dev_set_drvdata(&spi_dev->dev, chip); + dev_set_drvdata(&spi_dev->dev, indio_dev); chip->spi_dev = spi_dev; for (i = 0; i <= AD7816_CS_MAX; i++) @@ -373,7 +374,7 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev) if (ret) { dev_err(&spi_dev->dev, "Fail to request rdwr gpio PIN %d.\n", chip->rdwr_pin); - goto error_free_chip; + goto error_free_device; } gpio_direction_input(chip->rdwr_pin); ret = gpio_request(chip->convert_pin, spi_get_device_id(spi_dev)->name); @@ -391,20 +392,14 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev) } gpio_direction_input(chip->busy_pin); - chip->indio_dev = iio_allocate_device(0); - if (chip->indio_dev == NULL) { - ret = -ENOMEM; - goto error_free_gpio; - } - chip->indio_dev->name = spi_get_device_id(spi_dev)->name; - chip->indio_dev->dev.parent = &spi_dev->dev; - chip->indio_dev->info = &ad7816_info; - chip->indio_dev->dev_data = (void *)chip; - chip->indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->name = spi_get_device_id(spi_dev)->name; + indio_dev->dev.parent = &spi_dev->dev; + indio_dev->info = &ad7816_info; + indio_dev->modes = INDIO_DIRECT_MODE; - ret = iio_device_register(chip->indio_dev); + ret = iio_device_register(indio_dev); if (ret) - goto error_free_dev; + goto error_free_gpio; if (spi_dev->irq) { /* Only low trigger is supported in ad7816/7/8 */ @@ -412,47 +407,44 @@ static int __devinit ad7816_probe(struct spi_device *spi_dev) NULL, &ad7816_event_handler, IRQF_TRIGGER_LOW, - chip->indio_dev->name, - chip->indio_dev); + indio_dev->name, + indio_dev); if (ret) goto error_unreg_dev; } dev_info(&spi_dev->dev, "%s temperature sensor and ADC registered.\n", - chip->indio_dev->name); + indio_dev->name); return 0; error_unreg_dev: - iio_device_unregister(chip->indio_dev); -error_free_dev: - iio_free_device(chip->indio_dev); + iio_device_unregister(indio_dev); error_free_gpio: gpio_free(chip->busy_pin); error_free_gpio_convert: gpio_free(chip->convert_pin); error_free_gpio_rdwr: gpio_free(chip->rdwr_pin); -error_free_chip: - kfree(chip); - +error_free_device: + iio_free_device(indio_dev); +error_ret: return ret; } static int __devexit ad7816_remove(struct spi_device *spi_dev) { - struct ad7816_chip_info *chip = dev_get_drvdata(&spi_dev->dev); - struct iio_dev *indio_dev = chip->indio_dev; + struct iio_dev *indio_dev = dev_get_drvdata(&spi_dev->dev); + struct ad7816_chip_info *chip = iio_priv(indio_dev); dev_set_drvdata(&spi_dev->dev, NULL); if (spi_dev->irq) free_irq(spi_dev->irq, indio_dev); - iio_device_unregister(indio_dev); - iio_free_device(chip->indio_dev); gpio_free(chip->busy_pin); gpio_free(chip->convert_pin); gpio_free(chip->rdwr_pin); - kfree(chip); + iio_device_unregister(indio_dev); + iio_free_device(indio_dev); return 0; }