diff options
| -rw-r--r-- | Documentation/devicetree/bindings/input/tca8418_keypad.txt | 8 | ||||
| -rw-r--r-- | drivers/input/keyboard/tca8418_keypad.c | 68 |
2 files changed, 49 insertions, 27 deletions
diff --git a/Documentation/devicetree/bindings/input/tca8418_keypad.txt b/Documentation/devicetree/bindings/input/tca8418_keypad.txt new file mode 100644 index 000000000000..2a1538f0053f --- /dev/null +++ b/Documentation/devicetree/bindings/input/tca8418_keypad.txt @@ -0,0 +1,8 @@ + +Required properties: +- compatible: "ti,tca8418" +- reg: the I2C address +- interrupts: IRQ line number, should trigger on falling edge +- keypad,num-rows: The number of rows +- keypad,num-columns: The number of columns +- linux,keymap: Keys definitions, see keypad-matrix. diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c index f1e966bdcff5..1a2894dd03ca 100644 --- a/drivers/input/keyboard/tca8418_keypad.c +++ b/drivers/input/keyboard/tca8418_keypad.c @@ -35,6 +35,7 @@ #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/tca8418_keypad.h> +#include <linux/of.h> /* TCA8418 hardware limits */ #define TCA8418_MAX_ROWS 8 @@ -116,10 +117,15 @@ static const struct i2c_device_id tca8418_id[] = { }; MODULE_DEVICE_TABLE(i2c, tca8418_id); +#ifdef CONFIG_OF +static const struct of_device_id tca8418_dt_ids[] __devinitconst = { + { .compatible = "ti,tca8418", }, + { } +}; +MODULE_DEVICE_TABLE(of, tca8418_dt_ids); +#endif + struct tca8418_keypad { - unsigned int rows; - unsigned int cols; - unsigned int keypad_mask; /* Mask for keypad col/rol regs */ unsigned int irq; unsigned int row_shift; @@ -241,7 +247,8 @@ exit: /* * Configure the TCA8418 for keypad operation */ -static int tca8418_configure(struct tca8418_keypad *keypad_data) +static int tca8418_configure(struct tca8418_keypad *keypad_data, + u32 rows, u32 cols) { int reg, error; @@ -253,9 +260,8 @@ static int tca8418_configure(struct tca8418_keypad *keypad_data) /* Assemble a mask for row and column registers */ - reg = ~(~0 << keypad_data->rows); - reg += (~(~0 << keypad_data->cols)) << 8; - keypad_data->keypad_mask = reg; + reg = ~(~0 << rows); + reg += (~(~0 << cols)) << 8; /* Set registers to keypad mode */ error |= tca8418_write_byte(keypad_data, REG_KP_GPIO1, reg); @@ -277,25 +283,36 @@ static int tca8418_keypad_probe(struct i2c_client *client, client->dev.platform_data; struct tca8418_keypad *keypad_data; struct input_dev *input; + const struct matrix_keymap_data *keymap_data = NULL; + u32 rows = 0, cols = 0; + bool rep = false; + bool irq_is_gpio = false; int error, row_shift, max_keys; /* Copy the platform data */ - if (!pdata) { - dev_dbg(&client->dev, "no platform data\n"); - return -EINVAL; + if (pdata) { + if (!pdata->keymap_data) { + dev_err(&client->dev, "no keymap data defined\n"); + return -EINVAL; + } + keymap_data = pdata->keymap_data; + rows = pdata->rows; + cols = pdata->cols; + rep = pdata->rep; + irq_is_gpio = pdata->irq_is_gpio; + } else { + struct device_node *np = client->dev.of_node; + of_property_read_u32(np, "keypad,num-rows", &rows); + of_property_read_u32(np, "keypad,num-columns", &cols); + rep = of_property_read_bool(np, "keypad,autorepeat"); } - if (!pdata->keymap_data) { - dev_err(&client->dev, "no keymap data defined\n"); - return -EINVAL; - } - - if (!pdata->rows || pdata->rows > TCA8418_MAX_ROWS) { + if (!rows || rows > TCA8418_MAX_ROWS) { dev_err(&client->dev, "invalid rows\n"); return -EINVAL; } - if (!pdata->cols || pdata->cols > TCA8418_MAX_COLS) { + if (!cols || cols > TCA8418_MAX_COLS) { dev_err(&client->dev, "invalid columns\n"); return -EINVAL; } @@ -307,8 +324,8 @@ static int tca8418_keypad_probe(struct i2c_client *client, return -ENODEV; } - row_shift = get_count_order(pdata->cols); - max_keys = pdata->rows << row_shift; + row_shift = get_count_order(cols); + max_keys = rows << row_shift; /* Allocate memory for keypad_data, keymap and input device */ keypad_data = kzalloc(sizeof(*keypad_data) + @@ -316,13 +333,11 @@ static int tca8418_keypad_probe(struct i2c_client *client, if (!keypad_data) return -ENOMEM; - keypad_data->rows = pdata->rows; - keypad_data->cols = pdata->cols; keypad_data->client = client; keypad_data->row_shift = row_shift; /* Initialize the chip or fail if chip isn't present */ - error = tca8418_configure(keypad_data); + error = tca8418_configure(keypad_data, rows, cols); if (error < 0) goto fail1; @@ -342,21 +357,20 @@ static int tca8418_keypad_probe(struct i2c_client *client, input->id.product = 0x001; input->id.version = 0x0001; - error = matrix_keypad_build_keymap(pdata->keymap_data, NULL, - pdata->rows, pdata->cols, + error = matrix_keypad_build_keymap(keymap_data, NULL, rows, cols, keypad_data->keymap, input); if (error) { dev_dbg(&client->dev, "Failed to build keymap\n"); goto fail2; } - if (pdata->rep) + if (rep) __set_bit(EV_REP, input->evbit); input_set_capability(input, EV_MSC, MSC_SCAN); input_set_drvdata(input, keypad_data); - if (pdata->irq_is_gpio) + if (irq_is_gpio) client->irq = gpio_to_irq(client->irq); error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler, @@ -401,11 +415,11 @@ static int tca8418_keypad_remove(struct i2c_client *client) return 0; } - static struct i2c_driver tca8418_keypad_driver = { .driver = { .name = TCA8418_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(tca8418_dt_ids), }, .probe = tca8418_keypad_probe, .remove = tca8418_keypad_remove, |