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