[PATCH v3 1/3] Input: imx_keypad - Add device tree support
Liu Ying
liu.y.victor at gmail.com
Tue Jan 8 02:35:13 EST 2013
Hi, Dmitry,
Do you have any more comment for version 3?
Thanks.
2013/1/3 Liu Ying <Ying.Liu at freescale.com>:
> This patch adds device tree support for imx keypad driver.
>
> Signed-off-by: Liu Ying <Ying.Liu at freescale.com>
> ---
> Changes since v2:
> - Improve the logic in the probe function to check whether
> DT-supplied data is presented or not.
>
> Changes since v1:
> - Parse the array keypad->keycodes[] to get row and column
> mask value instead of parsing DT-supplied data again.
> - Remove the pinctrl related code which sets row and column
> key pins.
> - Leave matrix_keypad_build_keymap() to determine platform
> data and DT-supplied data precedence.
> - Change DT compatible string from 'fsl,imx-kpp' to 'fsl,
> <soc>-kpp'.
> ---
> .../devicetree/bindings/input/imx-keypad.txt | 53 ++++++++++++++++++++
> drivers/input/keyboard/imx_keypad.c | 42 +++++++++-------
> 2 files changed, 77 insertions(+), 18 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/input/imx-keypad.txt
>
> diff --git a/Documentation/devicetree/bindings/input/imx-keypad.txt b/Documentation/devicetree/bindings/input/imx-keypad.txt
> new file mode 100644
> index 0000000..2ebaf7d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/imx-keypad.txt
> @@ -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 at 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 */
> +};
> diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c
> index 6d150e3..83dc5cd 100644
> --- a/drivers/input/keyboard/imx_keypad.c
> +++ b/drivers/input/keyboard/imx_keypad.c
> @@ -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 +415,21 @@ open_err:
> return -EIO;
> }
>
> +static struct of_device_id imx_keypad_of_match[] = {
> + { .compatible = "fsl,imx21-kpp", },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_keypad_of_match);
> +
> 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, row_shift;
>
> - if (keymap_data == NULL) {
> + if (keymap_data == NULL && pdev->dev.of_node == NULL) {
> dev_err(&pdev->dev, "no keymap defined\n");
> return -EINVAL;
> }
> @@ -480,22 +487,6 @@ 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 +503,20 @@ static int imx_keypad_probe(struct platform_device *pdev)
> goto failed_clock_put;
> }
>
> + /* Search for rows and cols enabled */
> + row_shift = get_count_order(MAX_MATRIX_KEY_COLS);
> + for (row = 0; row < MAX_MATRIX_KEY_ROWS; row++) {
> + for (col = 0; col < MAX_MATRIX_KEY_COLS; col++) {
> + i = (row << row_shift) + col;
> + if (keypad->keycodes[i]) {
> + 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 +636,7 @@ 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,
> --
> 1.7.1
>
>
--
Best Regards,
Liu Ying
More information about the linux-arm-kernel
mailing list