diff options
| author | Juergen Beisert <jbe@pengutronix.de> | 2013-09-23 15:36:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2013-10-01 16:19:17 +0100 |
| commit | e9c88fb5cf05ae198323a3c992b41885397a0b48 (patch) | |
| tree | 80d195255b56b03f785fa0a3e61770028a617194 /Documentation | |
| parent | cd6c5586524e10512b910b3ff44465f0aaf5cd1b (diff) | |
Staging/iio/adc/touchscreen/MXS: provide devicetree adaption
This is an RFC for the new touchscreen properties.
Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
Tested-by: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
CC: linux-arm-kernel@lists.infradead.org
CC: linux-input@vger.kernel.org
CC: devel@driverdev.osuosl.org
CC: Marek Vasut <marex@denx.de>
CC: Fabio Estevam <fabio.estevam@freescale.com>
CC: devicetree@vger.kernel.org
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt b/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt index 46882058b59b..ee05dc390694 100644 --- a/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt +++ b/Documentation/devicetree/bindings/staging/iio/adc/mxs-lradc.txt @@ -1,7 +1,8 @@ * Freescale i.MX28 LRADC device driver Required properties: -- compatible: Should be "fsl,imx28-lradc" +- compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc" + for i.MX28 SoC - reg: Address and length of the register set for the device - interrupts: Should contain the LRADC interrupts @@ -9,13 +10,38 @@ Optional properties: - fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen to LRADC. Valid value is either 4 or 5. If this property is not present, then the touchscreen is - disabled. + disabled. 5 wires is valid for i.MX28 SoC only. +- fsl,ave-ctrl: number of samples per direction to calculate an average value. + Allowed value is 1 ... 31, default is 4 +- fsl,ave-delay: delay between consecutive samples. Allowed value is + 1 ... 2047. It is used if 'fsl,ave-ctrl' > 1, counts at + 2 kHz and its default is 2 (= 1 ms) +- fsl,settling: delay between plate switch to next sample. Allowed value is + 1 ... 2047. It counts at 2 kHz and its default is + 10 (= 5 ms) -Examples: +Example for i.MX23 SoC: + + lradc@80050000 { + compatible = "fsl,imx23-lradc"; + reg = <0x80050000 0x2000>; + interrupts = <36 37 38 39 40 41 42 43 44>; + status = "okay"; + fsl,lradc-touchscreen-wires = <4>; + fsl,ave-ctrl = <4>; + fsl,ave-delay = <2>; + fsl,settling = <10>; + }; + +Example for i.MX28 SoC: lradc@80050000 { compatible = "fsl,imx28-lradc"; reg = <0x80050000 0x2000>; - interrupts = <10 14 15 16 17 18 19 - 20 21 22 23 24 25>; + interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>; + status = "okay"; + fsl,lradc-touchscreen-wires = <5>; + fsl,ave-ctrl = <4>; + fsl,ave-delay = <2>; + fsl,settling = <10>; }; |