On Mon, Jun 15, 2015 at 05:01:36PM +0800, Dudley Du wrote:
> Add of_match_device mechanism support for Cypress trackpad device, and
> add the sample description document of adding the trackpad device node in
> device tree.
> TEST=test on Chromebook.
>
> Signed-off-by: Dudley Du <dudl@xxxxxxxxxxx>
> ---
> .../devicetree/bindings/input/cypress,cyapa.txt | 44 ++++++++++++++++++++++
> .../devicetree/bindings/vendor-prefixes.txt | 1 +
> drivers/input/mouse/cyapa.c | 10 +++++
> 3 files changed, 55 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/input/cypress,cyapa.txt
>
> diff --git a/Documentation/devicetree/bindings/input/cypress,cyapa.txt b/Documentation/devicetree/bindings/input/cypress,cyapa.txt
> new file mode 100644
> index 0000000..9be2b44
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/cypress,cyapa.txt
> @@ -0,0 +1,44 @@
> +Cypress I2C Touchpad
> +
> +Required properties:
> +- compatible: must be "cypress,cyapa".
> +- reg: I2C address of the chip.
> +- interrupt-parent: a phandle for the interrupt controller (see interrupt
> + binding[0]).
> +- interrupts: interrupt to which the chip is connected (see interrupt
> + binding[0]).
> +
> +Optional properties:
> +- wakeup-source: touchpad can be used as a wakeup source.
> +- pinctrl-names: should be "default" (see pinctrl binding [1]).
> +- pinctrl-0: a phandle pointing to the pin settings for the device (see
> + pinctrl binding [1]).
> +- vcc-supply: a phandle for the regulator supplying 3.3V power.
I do not see it being used in the driver?
> +
> +[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
> +[1]: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
> +
> +Example:
> + &i2c0 {
> + /* ... */
> +
> + /* Cypress Gen3 touchpad */
> + touchpad@67 {
> + compatible = "cypress,cyapa";
> + reg = <0x24>;
> + interrupt-parent = <&gpio>;
> + interrupts = <2 IRQ_TYPE_EDGE_FALLING>; /* GPIO 2 */
> + wakeup-source;
> + };
> +
> + /* Cypress Gen5 and later touchpad */
> + touchpad@24 {
> + compatible = "cypress,cyapa";
> + reg = <0x24>;
> + interrupt-parent = <&gpio>;
> + interrupts = <2 IRQ_TYPE_EDGE_FALLING>; /* GPIO 2 */
> + wakeup-source;
> + };
> +
> + /* ... */
> + };
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
> index ee2ce7b..e43d532 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.txt
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
> @@ -54,6 +54,7 @@ cortina Cortina Systems, Inc.
> cosmic Cosmic Circuits
> crystalfontz Crystalfontz America, Inc.
> cubietech Cubietech, Ltd.
> +cypress Cypress Semiconductor Corporation
> dallas Maxim Integrated Products (formerly Dallas Semiconductor)
> davicom DAVICOM Semiconductor, Inc.
> delta Delta Electronics, Inc.
> diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
> index 4e69594..7b6d6d4 100644
> --- a/drivers/input/mouse/cyapa.c
> +++ b/drivers/input/mouse/cyapa.c
> @@ -25,6 +25,7 @@
> #include <linux/uaccess.h>
> #include <linux/pm_runtime.h>
> #include <linux/acpi.h>
> +#include <linux/of.h>
> #include "cyapa.h"
>
>
> @@ -1562,12 +1563,21 @@ static const struct acpi_device_id cyapa_acpi_id[] = {
> MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id);
> #endif
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id cyapa_of_match[] = {
> + { .compatible = "cypress,cyapa" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, cyapa_of_match);
> +#endif
> +
> static struct i2c_driver cyapa_driver = {
> .driver = {
> .name = "cyapa",
> .owner = THIS_MODULE,
> .pm = &cyapa_pm_ops,
> .acpi_match_table = ACPI_PTR(cyapa_acpi_id),
> + .of_match_table = of_match_ptr(cyapa_of_match),
> },
>
> .probe = cyapa_probe,
> --
> 1.9.1
>
>
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--
Dmitry
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