Hi Lothar,
On Thu, Jan 16, 2014 at 09:02:18AM +0100, Lothar Waßmann wrote:
>
> Signed-off-by: Lothar Waßmann <l...@karo-electronics.de>
> ---
> .../bindings/input/touchscreen/edt-ft5x06.txt | 29 +++++
> drivers/input/touchscreen/edt-ft5x06.c | 121
> +++++++++++++++++---
> 2 files changed, 132 insertions(+), 18 deletions(-)
> create mode 100644
> Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
>
> diff --git
> a/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> new file mode 100644
> index 0000000..8d94cdc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/edt-ft5x06.txt
> @@ -0,0 +1,29 @@
> +* EDT FT5x06 Multiple Touch Controller
> +
> +Required properties:
> +- compatible: must be "edt,ft5x06"
> +- reg: i2c slave address
> +- interrupt-parent: the phandle for the interrupt controller
> +- interrupts: touch controller interrupt
> +
> +Optional properties:
> +- reset-gpios: the gpio pin to be used for resetting the controller
> +- wake-gpios: the gpio pin to be used for waking up the controller
> +
> + The following properties provide default values for the
> + corresponding parameters (see Documentation/input/edt-ft5x06.txt)
> +- edt,threshold: allows setting the "click"-threshold in the range from 20
> to 80.
> +- edt,gain: sensitivity (0..31) (lower value -> higher sensitivity)
> +- edt,offset: edge compensation (0..31)
> +- edt,report-rate: report rate (3..14)
I wonder if we really need to have it in device tree? Can users needing
top tweak the settings do it via udev rules?
> +
> +Example:
> +
> + edt_ft5x06@38 {
> + compatible = "edt,ft5x06";
> + reg = <0x38>;
> + interrupt-parent = <&gpio2>;
> + interrupts = <5 0>;
> + reset-gpios = <&gpio2 6 1>;
> + wake-gpios = <&gpio4 9 0>;
> + };
> diff --git a/drivers/input/touchscreen/edt-ft5x06.c
> b/drivers/input/touchscreen/edt-ft5x06.c
> index acb6b9f..0467591 100644
> --- a/drivers/input/touchscreen/edt-ft5x06.c
> +++ b/drivers/input/touchscreen/edt-ft5x06.c
> @@ -33,6 +33,7 @@
> #include <linux/debugfs.h>
> #include <linux/slab.h>
> #include <linux/gpio.h>
> +#include <linux/of_gpio.h>
> #include <linux/input/mt.h>
> #include <linux/input/edt-ft5x06.h>
>
> @@ -65,6 +66,10 @@ struct edt_ft5x06_ts_data {
> u16 num_x;
> u16 num_y;
>
> + int reset_pin;
> + int irq_pin;
> + int wake_pin;
> +
> #if defined(CONFIG_DEBUG_FS)
> struct dentry *debug_dir;
> u8 *raw_buffer;
> @@ -617,25 +622,38 @@ edt_ft5x06_ts_teardown_debugfs(struct
> edt_ft5x06_ts_data *tsdata)
>
>
> static int edt_ft5x06_ts_reset(struct i2c_client *client,
> - int reset_pin)
> + struct edt_ft5x06_ts_data *tsdata)
> {
> int error;
>
> - if (gpio_is_valid(reset_pin)) {
> + if (gpio_is_valid(tsdata->wake_pin)) {
> + error = devm_gpio_request_one(&client->dev, tsdata->wake_pin,
> + GPIOF_OUT_INIT_LOW, "edt-ft5x06 wake");
> + if (error) {
> + dev_err(&client->dev,
> + "Failed to request GPIO %d as wake pin, error
> %d\n",
> + tsdata->wake_pin, error);
> + return error;
> + }
> +
> + mdelay(5);
> + gpio_set_value(tsdata->wake_pin, 1);
> + }
> + if (gpio_is_valid(tsdata->reset_pin)) {
> /* this pulls reset down, enabling the low active reset */
> - error = devm_gpio_request_one(&client->dev, reset_pin,
> + error = devm_gpio_request_one(&client->dev, tsdata->reset_pin,
> GPIOF_OUT_INIT_LOW,
> "edt-ft5x06 reset");
> if (error) {
> dev_err(&client->dev,
> "Failed to request GPIO %d as reset pin, error
> %d\n",
> - reset_pin, error);
> + tsdata->reset_pin, error);
> return error;
> }
>
> - mdelay(50);
> - gpio_set_value(reset_pin, 1);
> - mdelay(100);
> + mdelay(5);
> + gpio_set_value(tsdata->reset_pin, 1);
> + mdelay(300);
Hmm, this change seems unrelated to DT support.
Thanks.
--
Dmitry
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