On 10/06/2014 at 15:41:35 +0200, Robert Hodaszi wrote :
> Commit c8231a9af8147f8a401fc55931ec44abfb937660 ("iio: mxs-lradc: compute
> temperature from channel 8 and 9") merged channel 8 and channel 9 to create an
> IIO_TEMP channel. It changed the number of LRADC channels, which could cause
> incompatibility with previous device-tree declarations, and also makes it
> illogical (e.g. channel 15 is <&lradc 14>).
>
> Add channel 9 as a copy of channel 8. Reading channel 9 has the same output as
> reading channel 8.
>
> Signed-off-by: Robert Hodaszi <robert.hodaszi@xxxxxxxx>
Acked-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/staging/iio/adc/mxs-lradc.c | 61 +++++++++++++++++++++----------------
> 1 file changed, 35 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/staging/iio/adc/mxs-lradc.c b/drivers/staging/iio/adc/mxs-lradc.c
> index 52d7517..25c0519 100644
> --- a/drivers/staging/iio/adc/mxs-lradc.c
> +++ b/drivers/staging/iio/adc/mxs-lradc.c
> @@ -1376,8 +1376,8 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = {
> * Driver initialization
> */
>
> -#define MXS_ADC_CHAN(idx, chan_type) { \
> - .type = (chan_type), \
> +#define MXS_ADC_VOLTAGE_CHAN(idx) { \
> + .type = IIO_VOLTAGE, \
> .indexed = 1, \
> .scan_index = (idx), \
> .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> @@ -1391,32 +1391,41 @@ static const struct iio_buffer_setup_ops mxs_lradc_buffer_ops = {
> }, \
> }
>
> +#define MXS_ADC_TEMP_CHAN(idx) { \
> + .type = IIO_TEMP, \
> + .indexed = 1, \
> + .scan_index = (idx), \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
> + BIT(IIO_CHAN_INFO_SCALE) | \
> + BIT(IIO_CHAN_INFO_OFFSET), \
> + .channel = (idx), \
> + .address = (idx), \
> + .scan_type = { \
> + .sign = 'u', \
> + .realbits = 18, \
> + .storagebits = 32, \
> + }, \
> +}
> +
> static const struct iio_chan_spec mxs_lradc_chan_spec[] = {
> - MXS_ADC_CHAN(0, IIO_VOLTAGE),
> - MXS_ADC_CHAN(1, IIO_VOLTAGE),
> - MXS_ADC_CHAN(2, IIO_VOLTAGE),
> - MXS_ADC_CHAN(3, IIO_VOLTAGE),
> - MXS_ADC_CHAN(4, IIO_VOLTAGE),
> - MXS_ADC_CHAN(5, IIO_VOLTAGE),
> - MXS_ADC_CHAN(6, IIO_VOLTAGE),
> - MXS_ADC_CHAN(7, IIO_VOLTAGE), /* VBATT */
> + MXS_ADC_VOLTAGE_CHAN(0),
> + MXS_ADC_VOLTAGE_CHAN(1),
> + MXS_ADC_VOLTAGE_CHAN(2),
> + MXS_ADC_VOLTAGE_CHAN(3),
> + MXS_ADC_VOLTAGE_CHAN(4),
> + MXS_ADC_VOLTAGE_CHAN(5),
> + MXS_ADC_VOLTAGE_CHAN(6),
> + MXS_ADC_VOLTAGE_CHAN(7), /* VBATT */
> /* Combined Temperature sensors */
> - {
> - .type = IIO_TEMP,
> - .indexed = 1,
> - .scan_index = 8,
> - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
> - BIT(IIO_CHAN_INFO_OFFSET) |
> - BIT(IIO_CHAN_INFO_SCALE),
> - .channel = 8,
> - .scan_type = {.sign = 'u', .realbits = 18, .storagebits = 32,},
> - },
> - MXS_ADC_CHAN(10, IIO_VOLTAGE), /* VDDIO */
> - MXS_ADC_CHAN(11, IIO_VOLTAGE), /* VTH */
> - MXS_ADC_CHAN(12, IIO_VOLTAGE), /* VDDA */
> - MXS_ADC_CHAN(13, IIO_VOLTAGE), /* VDDD */
> - MXS_ADC_CHAN(14, IIO_VOLTAGE), /* VBG */
> - MXS_ADC_CHAN(15, IIO_VOLTAGE), /* VDD5V */
> + MXS_ADC_TEMP_CHAN(8),
> + /* CH 9 is the same as CH 8. Declared to fix following channel indexes */
> + MXS_ADC_TEMP_CHAN(9),
> + MXS_ADC_VOLTAGE_CHAN(10), /* VDDIO */
> + MXS_ADC_VOLTAGE_CHAN(11), /* VTH */
> + MXS_ADC_VOLTAGE_CHAN(12), /* VDDA */
> + MXS_ADC_VOLTAGE_CHAN(13), /* VDDD */
> + MXS_ADC_VOLTAGE_CHAN(14), /* VBG */
> + MXS_ADC_VOLTAGE_CHAN(15), /* VDD5V */
> };
>
> static int mxs_lradc_hw_init(struct mxs_lradc *lradc)
--
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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