#include <linux/kernel.h>
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/i2c/twl.h>
#include <linux/slab.h>
+#include <linux/of.h>
/*
* The TWL4030 family chips include a keypad controller that supports
struct twl4030_keypad {
unsigned short keymap[TWL4030_KEYMAP_SIZE];
u16 kp_state[TWL4030_MAX_ROWS];
+ bool autorepeat;
unsigned n_rows;
unsigned n_cols;
unsigned irq;
*/
static int twl4030_kp_probe(struct platform_device *pdev)
{
- struct twl4030_keypad_data *pdata = pdev->dev.platform_data;
- const struct matrix_keymap_data *keymap_data;
+ struct twl4030_keypad_data *pdata = dev_get_platdata(&pdev->dev);
+ const struct matrix_keymap_data *keymap_data = NULL;
struct twl4030_keypad *kp;
struct input_dev *input;
u8 reg;
int error;
- if (!pdata || !pdata->rows || !pdata->cols || !pdata->keymap_data ||
- pdata->rows > TWL4030_MAX_ROWS || pdata->cols > TWL4030_MAX_COLS) {
- dev_err(&pdev->dev, "Invalid platform_data\n");
- return -EINVAL;
- }
+ kp = devm_kzalloc(&pdev->dev, sizeof(*kp), GFP_KERNEL);
+ if (!kp)
+ return -ENOMEM;
- keymap_data = pdata->keymap_data;
-
- kp = kzalloc(sizeof(*kp), GFP_KERNEL);
- input = input_allocate_device();
- if (!kp || !input) {
- error = -ENOMEM;
- goto err1;
- }
+ input = devm_input_allocate_device(&pdev->dev);
+ if (!input)
+ return -ENOMEM;
- /* Get the debug Device */
- kp->dbg_dev = &pdev->dev;
- kp->input = input;
-
- kp->n_rows = pdata->rows;
- kp->n_cols = pdata->cols;
- kp->irq = platform_get_irq(pdev, 0);
+ /* get the debug device */
+ kp->dbg_dev = &pdev->dev;
+ kp->input = input;
/* setup input device */
input->name = "TWL4030 Keypad";
input->phys = "twl4030_keypad/input0";
- input->dev.parent = &pdev->dev;
input->id.bustype = BUS_HOST;
input->id.vendor = 0x0001;
input->id.product = 0x0001;
input->id.version = 0x0003;
+ if (pdata) {
+ if (!pdata->rows || !pdata->cols || !pdata->keymap_data) {
+ dev_err(&pdev->dev, "Missing platform_data\n");
+ return -EINVAL;
+ }
+
+ kp->n_rows = pdata->rows;
+ kp->n_cols = pdata->cols;
+ kp->autorepeat = pdata->rep;
+ keymap_data = pdata->keymap_data;
+ } else {
+ error = matrix_keypad_parse_of_params(&pdev->dev, &kp->n_rows,
+ &kp->n_cols);
+ if (error)
+ return error;
+
+ kp->autorepeat = true;
+ }
+
+ if (kp->n_rows > TWL4030_MAX_ROWS || kp->n_cols > TWL4030_MAX_COLS) {
+ dev_err(&pdev->dev,
+ "Invalid rows/cols amount specified in platform/devicetree data\n");
+ return -EINVAL;
+ }
+
+ kp->irq = platform_get_irq(pdev, 0);
+ if (!kp->irq) {
+ dev_err(&pdev->dev, "no keyboard irq assigned\n");
+ return -EINVAL;
+ }
+
error = matrix_keypad_build_keymap(keymap_data, NULL,
TWL4030_MAX_ROWS,
1 << TWL4030_ROW_SHIFT,
kp->keymap, input);
if (error) {
dev_err(kp->dbg_dev, "Failed to build keymap\n");
- goto err1;
+ return error;
}
input_set_capability(input, EV_MSC, MSC_SCAN);
/* Enable auto repeat feature of Linux input subsystem */
- if (pdata->rep)
+ if (kp->autorepeat)
__set_bit(EV_REP, input->evbit);
error = input_register_device(input);
if (error) {
dev_err(kp->dbg_dev,
"Unable to register twl4030 keypad device\n");
- goto err1;
+ return error;
}
error = twl4030_kp_program(kp);
if (error)
- goto err2;
+ return error;
/*
* This ISR will always execute in kernel thread context because of
*
* NOTE: we assume this host is wired to TWL4040 INT1, not INT2 ...
*/
- error = request_threaded_irq(kp->irq, NULL, do_kp_irq,
- 0, pdev->name, kp);
+ error = devm_request_threaded_irq(&pdev->dev, kp->irq, NULL, do_kp_irq,
+ 0, pdev->name, kp);
if (error) {
- dev_info(kp->dbg_dev, "request_irq failed for irq no=%d\n",
- kp->irq);
- goto err2;
+ dev_info(kp->dbg_dev, "request_irq failed for irq no=%d: %d\n",
+ kp->irq, error);
+ return error;
}
/* Enable KP and TO interrupts now. */
reg = (u8) ~(KEYP_IMR1_KP | KEYP_IMR1_TO);
if (twl4030_kpwrite_u8(kp, reg, KEYP_IMR1)) {
- error = -EIO;
- goto err3;
+ /* mask all events - we don't care about the result */
+ (void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1);
+ return -EIO;
}
platform_set_drvdata(pdev, kp);
return 0;
-
-err3:
- /* mask all events - we don't care about the result */
- (void) twl4030_kpwrite_u8(kp, 0xff, KEYP_IMR1);
- free_irq(kp->irq, NULL);
-err2:
- input_unregister_device(input);
- input = NULL;
-err1:
- input_free_device(input);
- kfree(kp);
- return error;
}
-static int twl4030_kp_remove(struct platform_device *pdev)
-{
- struct twl4030_keypad *kp = platform_get_drvdata(pdev);
-
- free_irq(kp->irq, kp);
- input_unregister_device(kp->input);
- platform_set_drvdata(pdev, NULL);
- kfree(kp);
-
- return 0;
-}
+#ifdef CONFIG_OF
+static const struct of_device_id twl4030_keypad_dt_match_table[] = {
+ { .compatible = "ti,twl4030-keypad" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, twl4030_keypad_dt_match_table);
+#endif
/*
* NOTE: twl4030 are multi-function devices connected via I2C.
static struct platform_driver twl4030_kp_driver = {
.probe = twl4030_kp_probe,
- .remove = twl4030_kp_remove,
.driver = {
.name = "twl4030_keypad",
- .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(twl4030_keypad_dt_match_table),
},
};
module_platform_driver(twl4030_kp_driver);
projects / firefly-linux-kernel-4.4.55.git / blobdiff