forked from Minki/linux
Input: imx_keypad - add device tree support
This patch adds device tree support for imx keypad driver. Signed-off-by: Liu Ying <Ying.Liu@freescale.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Liu Ying
Dmitry Torokhov
parent
03c86ee154
commit
0e14235e6c
53
Documentation/devicetree/bindings/input/imx-keypad.txt
Normal file
53
Documentation/devicetree/bindings/input/imx-keypad.txt
Normal file
@ -0,0 +1,53 @@
|
||||
* Freescale i.MX Keypad Port(KPP) device tree bindings
|
||||
|
||||
The KPP is designed to interface with a keypad matrix with 2-point contact
|
||||
or 3-point contact keys. The KPP is designed to simplify the software task
|
||||
of scanning a keypad matrix. The KPP is capable of detecting, debouncing,
|
||||
and decoding one or multiple keys pressed simultaneously on a keypad.
|
||||
|
||||
Required SoC Specific Properties:
|
||||
- compatible: Should be "fsl,<soc>-kpp".
|
||||
|
||||
- reg: Physical base address of the KPP and length of memory mapped
|
||||
region.
|
||||
|
||||
- interrupts: The KPP interrupt number to the CPU(s).
|
||||
|
||||
- clocks: The clock provided by the SoC to the KPP. Some SoCs use dummy
|
||||
clock(The clock for the KPP is provided by the SoCs automatically).
|
||||
|
||||
Required Board Specific Properties:
|
||||
- pinctrl-names: The definition can be found at
|
||||
pinctrl/pinctrl-bindings.txt.
|
||||
|
||||
- pinctrl-0: The definition can be found at
|
||||
pinctrl/pinctrl-bindings.txt.
|
||||
|
||||
- linux,keymap: The definition can be found at
|
||||
bindings/input/matrix-keymap.txt.
|
||||
|
||||
Example:
|
||||
kpp: kpp@73f94000 {
|
||||
compatible = "fsl,imx51-kpp", "fsl,imx21-kpp";
|
||||
reg = <0x73f94000 0x4000>;
|
||||
interrupts = <60>;
|
||||
clocks = <&clks 0>;
|
||||
pinctrl-names = "default";
|
||||
pinctrl-0 = <&pinctrl_kpp_1>;
|
||||
linux,keymap = <0x00000067 /* KEY_UP */
|
||||
0x0001006c /* KEY_DOWN */
|
||||
0x00020072 /* KEY_VOLUMEDOWN */
|
||||
0x00030066 /* KEY_HOME */
|
||||
0x0100006a /* KEY_RIGHT */
|
||||
0x01010069 /* KEY_LEFT */
|
||||
0x0102001c /* KEY_ENTER */
|
||||
0x01030073 /* KEY_VOLUMEUP */
|
||||
0x02000040 /* KEY_F6 */
|
||||
0x02010042 /* KEY_F8 */
|
||||
0x02020043 /* KEY_F9 */
|
||||
0x02030044 /* KEY_F10 */
|
||||
0x0300003b /* KEY_F1 */
|
||||
0x0301003c /* KEY_F2 */
|
||||
0x0302003d /* KEY_F3 */
|
||||
0x03030074>; /* KEY_POWER */
|
||||
};
|
||||
@ -20,6 +20,7 @@
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/timer.h>
|
||||
@ -414,15 +415,23 @@ open_err:
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
static struct of_device_id imx_keypad_of_match[] = {
|
||||
{ .compatible = "fsl,imx21-kpp", },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, imx_keypad_of_match);
|
||||
#endif
|
||||
|
||||
static int imx_keypad_probe(struct platform_device *pdev)
|
||||
{
|
||||
const struct matrix_keymap_data *keymap_data = pdev->dev.platform_data;
|
||||
struct imx_keypad *keypad;
|
||||
struct input_dev *input_dev;
|
||||
struct resource *res;
|
||||
int irq, error, i;
|
||||
int irq, error, i, row, col;
|
||||
|
||||
if (keymap_data == NULL) {
|
||||
if (!keymap_data && !pdev->dev.of_node) {
|
||||
dev_err(&pdev->dev, "no keymap defined\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
@ -480,22 +489,6 @@ static int imx_keypad_probe(struct platform_device *pdev)
|
||||
goto failed_unmap;
|
||||
}
|
||||
|
||||
/* Search for rows and cols enabled */
|
||||
for (i = 0; i < keymap_data->keymap_size; i++) {
|
||||
keypad->rows_en_mask |= 1 << KEY_ROW(keymap_data->keymap[i]);
|
||||
keypad->cols_en_mask |= 1 << KEY_COL(keymap_data->keymap[i]);
|
||||
}
|
||||
|
||||
if (keypad->rows_en_mask > ((1 << MAX_MATRIX_KEY_ROWS) - 1) ||
|
||||
keypad->cols_en_mask > ((1 << MAX_MATRIX_KEY_COLS) - 1)) {
|
||||
dev_err(&pdev->dev,
|
||||
"invalid key data (too many rows or colums)\n");
|
||||
error = -EINVAL;
|
||||
goto failed_clock_put;
|
||||
}
|
||||
dev_dbg(&pdev->dev, "enabled rows mask: %x\n", keypad->rows_en_mask);
|
||||
dev_dbg(&pdev->dev, "enabled cols mask: %x\n", keypad->cols_en_mask);
|
||||
|
||||
/* Init the Input device */
|
||||
input_dev->name = pdev->name;
|
||||
input_dev->id.bustype = BUS_HOST;
|
||||
@ -512,6 +505,19 @@ static int imx_keypad_probe(struct platform_device *pdev)
|
||||
goto failed_clock_put;
|
||||
}
|
||||
|
||||
/* Search for rows and cols enabled */
|
||||
for (row = 0; row < MAX_MATRIX_KEY_ROWS; row++) {
|
||||
for (col = 0; col < MAX_MATRIX_KEY_COLS; col++) {
|
||||
i = MATRIX_SCAN_CODE(row, col, MATRIX_ROW_SHIFT);
|
||||
if (keypad->keycodes[i] != KEY_RESERVED) {
|
||||
keypad->rows_en_mask |= 1 << row;
|
||||
keypad->cols_en_mask |= 1 << col;
|
||||
}
|
||||
}
|
||||
}
|
||||
dev_dbg(&pdev->dev, "enabled rows mask: %x\n", keypad->rows_en_mask);
|
||||
dev_dbg(&pdev->dev, "enabled cols mask: %x\n", keypad->cols_en_mask);
|
||||
|
||||
__set_bit(EV_REP, input_dev->evbit);
|
||||
input_set_capability(input_dev, EV_MSC, MSC_SCAN);
|
||||
input_set_drvdata(input_dev, keypad);
|
||||
@ -631,6 +637,7 @@ static struct platform_driver imx_keypad_driver = {
|
||||
.name = "imx-keypad",
|
||||
.owner = THIS_MODULE,
|
||||
.pm = &imx_kbd_pm_ops,
|
||||
.of_match_table = of_match_ptr(imx_keypad_of_match),
|
||||
},
|
||||
.probe = imx_keypad_probe,
|
||||
.remove = imx_keypad_remove,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user