aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/keyboard/tca8418_keypad.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/input/keyboard/tca8418_keypad.c')
-rw-r--r--drivers/input/keyboard/tca8418_keypad.c179
1 files changed, 84 insertions, 95 deletions
diff --git a/drivers/input/keyboard/tca8418_keypad.c b/drivers/input/keyboard/tca8418_keypad.c
index 893869b29ed9..a34cc6714e5b 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
@@ -109,25 +110,11 @@
#define KEY_EVENT_CODE 0x7f
#define KEY_EVENT_VALUE 0x80
-
-static const struct i2c_device_id tca8418_id[] = {
- { TCA8418_NAME, 8418, },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, tca8418_id);
-
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;
-
struct i2c_client *client;
struct input_dev *input;
- /* Flexible array member, must be at end of struct */
- unsigned short keymap[];
+ unsigned int row_shift;
};
/*
@@ -172,6 +159,8 @@ static int tca8418_read_byte(struct tca8418_keypad *keypad_data,
static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
{
+ struct input_dev *input = keypad_data->input;
+ unsigned short *keymap = input->keycode;
int error, col, row;
u8 reg, state, code;
@@ -190,9 +179,8 @@ static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
col = (col) ? col - 1 : TCA8418_MAX_COLS - 1;
code = MATRIX_SCAN_CODE(row, col, keypad_data->row_shift);
- input_event(keypad_data->input, EV_MSC, MSC_SCAN, code);
- input_report_key(keypad_data->input,
- keypad_data->keymap[code], state);
+ input_event(input, EV_MSC, MSC_SCAN, code);
+ input_report_key(input, keymap[code], state);
/* Read for next loop */
error = tca8418_read_byte(keypad_data, REG_KEY_EVENT_A, &reg);
@@ -202,7 +190,7 @@ static void tca8418_read_keypad(struct tca8418_keypad *keypad_data)
dev_err(&keypad_data->client->dev,
"unable to read REG_KEY_EVENT_A\n");
- input_sync(keypad_data->input);
+ input_sync(input);
}
/*
@@ -218,16 +206,18 @@ static irqreturn_t tca8418_irq_handler(int irq, void *dev_id)
if (error) {
dev_err(&keypad_data->client->dev,
"unable to read REG_INT_STAT\n");
- goto exit;
+ return IRQ_NONE;
}
+ if (!reg)
+ return IRQ_NONE;
+
if (reg & INT_STAT_OVR_FLOW_INT)
dev_warn(&keypad_data->client->dev, "overflow occurred\n");
if (reg & INT_STAT_K_INT)
tca8418_read_keypad(keypad_data);
-exit:
/* Clear all interrupts, even IRQs we didn't check (GPI, CAD, LCK) */
reg = 0xff;
error = tca8418_write_byte(keypad_data, REG_INT_STAT, reg);
@@ -241,7 +231,8 @@ exit:
/*
* Configure the TCA8418 for keypad operation
*/
-static int __devinit 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 +244,8 @@ static int __devinit 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);
@@ -270,145 +260,144 @@ static int __devinit tca8418_configure(struct tca8418_keypad *keypad_data)
return error;
}
-static int __devinit tca8418_keypad_probe(struct i2c_client *client,
+static int tca8418_keypad_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct device *dev = &client->dev;
const struct tca8418_keypad_platform_data *pdata =
- client->dev.platform_data;
+ dev_get_platdata(dev);
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 irq;
int error, row_shift, max_keys;
/* Copy the platform data */
- if (!pdata) {
- dev_dbg(&client->dev, "no platform data\n");
- return -EINVAL;
- }
-
- if (!pdata->keymap_data) {
- dev_err(&client->dev, "no keymap data defined\n");
- return -EINVAL;
+ if (pdata) {
+ if (!pdata->keymap_data) {
+ dev_err(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 = 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->rows || pdata->rows > TCA8418_MAX_ROWS) {
- dev_err(&client->dev, "invalid rows\n");
+ if (!rows || rows > TCA8418_MAX_ROWS) {
+ dev_err(dev, "invalid rows\n");
return -EINVAL;
}
- if (!pdata->cols || pdata->cols > TCA8418_MAX_COLS) {
- dev_err(&client->dev, "invalid columns\n");
+ if (!cols || cols > TCA8418_MAX_COLS) {
+ dev_err(dev, "invalid columns\n");
return -EINVAL;
}
/* Check i2c driver capabilities */
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE)) {
- dev_err(&client->dev, "%s adapter not supported\n",
+ dev_err(dev, "%s adapter not supported\n",
dev_driver_string(&client->adapter->dev));
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) +
- max_keys * sizeof(keypad_data->keymap[0]), GFP_KERNEL);
+ /* Allocate memory for keypad_data and input device */
+ keypad_data = devm_kzalloc(dev, sizeof(*keypad_data), GFP_KERNEL);
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;
+ return error;
/* Configure input device */
- input = input_allocate_device();
- if (!input) {
- error = -ENOMEM;
- goto fail1;
- }
+ input = devm_input_allocate_device(dev);
+ if (!input)
+ return -ENOMEM;
+
keypad_data->input = input;
input->name = client->name;
- input->dev.parent = &client->dev;
-
input->id.bustype = BUS_I2C;
input->id.vendor = 0x0001;
input->id.product = 0x001;
input->id.version = 0x0001;
- error = matrix_keypad_build_keymap(pdata->keymap_data, NULL,
- pdata->rows, pdata->cols,
- keypad_data->keymap, input);
+ error = matrix_keypad_build_keymap(keymap_data, NULL, rows, cols,
+ NULL, input);
if (error) {
- dev_dbg(&client->dev, "Failed to build keymap\n");
- goto fail2;
+ dev_err(dev, "Failed to build keymap\n");
+ return error;
}
- 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)
- client->irq = gpio_to_irq(client->irq);
+ irq = client->irq;
+ if (irq_is_gpio)
+ irq = gpio_to_irq(irq);
- error = request_threaded_irq(client->irq, NULL, tca8418_irq_handler,
- IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
- client->name, keypad_data);
+ error = devm_request_threaded_irq(dev, irq, NULL, tca8418_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_SHARED |
+ IRQF_ONESHOT,
+ client->name, keypad_data);
if (error) {
- dev_dbg(&client->dev,
- "Unable to claim irq %d; error %d\n",
+ dev_err(dev, "Unable to claim irq %d; error %d\n",
client->irq, error);
- goto fail2;
+ return error;
}
error = input_register_device(input);
if (error) {
- dev_dbg(&client->dev,
- "Unable to register input device, error: %d\n", error);
- goto fail3;
+ dev_err(dev, "Unable to register input device, error: %d\n",
+ error);
+ return error;
}
- i2c_set_clientdata(client, keypad_data);
return 0;
-
-fail3:
- free_irq(client->irq, keypad_data);
-fail2:
- input_free_device(input);
-fail1:
- kfree(keypad_data);
- return error;
}
-static int __devexit tca8418_keypad_remove(struct i2c_client *client)
-{
- struct tca8418_keypad *keypad_data = i2c_get_clientdata(client);
-
- free_irq(keypad_data->client->irq, keypad_data);
-
- input_unregister_device(keypad_data->input);
-
- kfree(keypad_data);
-
- return 0;
-}
+static const struct i2c_device_id tca8418_id[] = {
+ { TCA8418_NAME, 8418, },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tca8418_id);
+#ifdef CONFIG_OF
+static const struct of_device_id tca8418_dt_ids[] = {
+ { .compatible = "ti,tca8418", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tca8418_dt_ids);
+#endif
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 = __devexit_p(tca8418_keypad_remove),
.id_table = tca8418_id,
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.