3 commits

Author	SHA1	Message	Date
Amaury Pouly	0324bf59a8	imx233: make button-lradc drive able to handle VDDIO derived values ... In most devices, the button ladder is not actually derived from VDDIO but from a constant voltage source, making it very easy to read it. However on some devices like ther ZEN X-Fi Style, the ladder is wired to VDDIO we can be changed so it's crucial that the button driver correctly scales the values wrt VDDIO. Change-Id: Ifc11abe2838fa7d16d0d60ecd96964a8dc5ea6d7	2014-02-10 23:14:25 +01:00
Amaury Pouly	5909438193	imx233: improve button lradc driver ... The driver can now handle HOLD in several ways, including using a GPIO. Also add a debug routine to read the raw value of the adc. Change-Id: Ide2cb1ac58e759b4bc464e606b432f2c150ee36f	2013-09-25 14:31:39 +02:00
Amaury Pouly	277d358eda	imx233: add generic lradc based button driver ... This driver does debouncing and best lradc usage and only requires a sorted table of values to work, this factoring code as much as possible. Change-Id: I84b46f4b08094634e1c5deb5ca9ba20763389e66	2013-06-18 16:43:27 +02:00