Messages in this thread | | | From | Marek Vasut <> | Subject | Re: [PATCH v2 1/5] iio: mxs-lradc: change the realbits to 12 | Date | Fri, 19 Jul 2013 15:56:46 +0200 |
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Dear Hector Palacios,
> The LRADC virtual channels have an 18 bit field to store the sum of up > to 2^5 accumulated samples. The read_raw function however only operates > over a single sample (12 bit resolution). > In order to use this field for scaling operations, we need it to be the > exact resolution value of the LRADC. > Besides, the driver was using an 18 bit mask (LRADC_CH_VALUE_MASK) to > report touch coordinates to userland. A 12 bit mask should be used instead > or else the touch libraries will expect a coordinates range between 0 > and 0x3ffff (18 bits), instead of between 0 and 0xfff (12 bits). > > Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Acked-by: Marek Vasut <marex@denx.de>
Best regards, Marek Vasut
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