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Input: imx_keypad - add device tree support

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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 2013-01-03 12:25:46 -08:00 committed by Dmitry Torokhov
parent 03c86ee154
commit 0e14235e6c
2 changed files with 78 additions and 18 deletions
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53
Documentation/devicetree/bindings/input/imx-keypad.txt Normal file
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@ -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 */
};

43
drivers/input/keyboard/imx_keypad.c
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@ -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 @@ static int imx_keypad_open(struct input_dev *dev)
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,