Based on kernel version 4.10.8. Page generated on 2017-04-01 14:43 EST.
1 * Freescale MXS LRADC device driver 2 3 Required properties: 4 - compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc" 5 for i.MX28 SoC 6 - reg: Address and length of the register set for the device 7 - interrupts: Should contain the LRADC interrupts 8 9 Optional properties: 10 - fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen 11 to LRADC. Valid value is either 4 or 5. If this 12 property is not present, then the touchscreen is 13 disabled. 5 wires is valid for i.MX28 SoC only. 14 - fsl,ave-ctrl: number of samples per direction to calculate an average value. 15 Allowed value is 1 ... 32, default is 4 16 - fsl,ave-delay: delay between consecutive samples. Allowed value is 17 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at 18 2 kHz and its default is 2 (= 1 ms) 19 - fsl,settling: delay between plate switch to next sample. Allowed value is 20 1 ... 2047. It counts at 2 kHz and its default is 21 10 (= 5 ms) 22 23 Example for i.MX23 SoC: 24 25 lradc@80050000 { 26 compatible = "fsl,imx23-lradc"; 27 reg = <0x80050000 0x2000>; 28 interrupts = <36 37 38 39 40 41 42 43 44>; 29 status = "okay"; 30 fsl,lradc-touchscreen-wires = <4>; 31 fsl,ave-ctrl = <4>; 32 fsl,ave-delay = <2>; 33 fsl,settling = <10>; 34 }; 35 36 Example for i.MX28 SoC: 37 38 lradc@80050000 { 39 compatible = "fsl,imx28-lradc"; 40 reg = <0x80050000 0x2000>; 41 interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>; 42 status = "okay"; 43 fsl,lradc-touchscreen-wires = <5>; 44 fsl,ave-ctrl = <4>; 45 fsl,ave-delay = <2>; 46 fsl,settling = <10>; 47 };