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path: root/drivers/input/keyboard/omap-keypad.c
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Diffstat (limited to 'drivers/input/keyboard/omap-keypad.c')
-rw-r--r--drivers/input/keyboard/omap-keypad.c153
1 files changed, 31 insertions, 122 deletions
diff --git a/drivers/input/keyboard/omap-keypad.c b/drivers/input/keyboard/omap-keypad.c
index d0d5226d9cd4..9e13f3f70a81 100644
--- a/drivers/input/keyboard/omap-keypad.c
+++ b/drivers/input/keyboard/omap-keypad.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/drivers/input/keyboard/omap-keypad.c
*
@@ -8,24 +9,9 @@
*
* Added support for H2 & H3 Keypad
* Copyright (C) 2004 Texas Instruments
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/input.h>
@@ -35,14 +21,14 @@
#include <linux/mutex.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/gpio.h>
#include <linux/platform_data/gpio-omap.h>
#include <linux/platform_data/keypad-omap.h>
+#include <linux/soc/ti/omap1-io.h>
#undef NEW_BOARD_LEARNING_MODE
static void omap_kp_tasklet(unsigned long);
-static void omap_kp_timer(unsigned long);
+static void omap_kp_timer(struct timer_list *);
static unsigned char keypad_state[8];
static DEFINE_MUTEX(kp_enable_mutex);
@@ -60,35 +46,7 @@ struct omap_kp {
unsigned short keymap[];
};
-static DECLARE_TASKLET_DISABLED(kp_tasklet, omap_kp_tasklet, 0);
-
-static unsigned int *row_gpios;
-static unsigned int *col_gpios;
-
-#ifdef CONFIG_ARCH_OMAP2
-static void set_col_gpio_val(struct omap_kp *omap_kp, u8 value)
-{
- int col;
-
- for (col = 0; col < omap_kp->cols; col++)
- gpio_set_value(col_gpios[col], value & (1 << col));
-}
-
-static u8 get_row_gpio_val(struct omap_kp *omap_kp)
-{
- int row;
- u8 value = 0;
-
- for (row = 0; row < omap_kp->rows; row++) {
- if (gpio_get_value(row_gpios[row]))
- value |= (1 << row);
- }
- return value;
-}
-#else
-#define set_col_gpio_val(x, y) do {} while (0)
-#define get_row_gpio_val(x) 0
-#endif
+static DECLARE_TASKLET_DISABLED_OLD(kp_tasklet, omap_kp_tasklet);
static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
{
@@ -100,7 +58,7 @@ static irqreturn_t omap_kp_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void omap_kp_timer(unsigned long data)
+static void omap_kp_timer(struct timer_list *unused)
{
tasklet_schedule(&kp_tasklet);
}
@@ -134,7 +92,6 @@ static void omap_kp_tasklet(unsigned long data)
unsigned int row_shift = get_count_order(omap_kp_data->cols);
unsigned char new_state[8], changed, key_down = 0;
int col, row;
- int spurious = 0;
/* check for any changes */
omap_kp_scan_keypad(omap_kp_data, new_state);
@@ -156,14 +113,6 @@ static void omap_kp_tasklet(unsigned long data)
"pressed" : "released");
#else
key = keycodes[MATRIX_SCAN_CODE(row, col, row_shift)];
- if (key < 0) {
- printk(KERN_WARNING
- "omap-keypad: Spurious key event %d-%d\n",
- col, row);
- /* We scan again after a couple of seconds */
- spurious = 1;
- continue;
- }
if (!(kp_cur_group == (key & GROUP_MASK) ||
kp_cur_group == -1))
@@ -179,12 +128,9 @@ static void omap_kp_tasklet(unsigned long data)
memcpy(keypad_state, new_state, sizeof(keypad_state));
if (key_down) {
- int delay = HZ / 20;
/* some key is pressed - keep irq disabled and use timer
* to poll the keypad */
- if (spurious)
- delay = 2 * HZ;
- mod_timer(&omap_kp_data->timer, jiffies + delay);
+ mod_timer(&omap_kp_data->timer, jiffies + HZ / 20);
} else {
/* enable interrupts */
omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
@@ -210,46 +156,33 @@ static ssize_t omap_kp_enable_store(struct device *dev, struct device_attribute
if ((state != 1) && (state != 0))
return -EINVAL;
- mutex_lock(&kp_enable_mutex);
- if (state != kp_enable) {
- if (state)
- enable_irq(omap_kp->irq);
- else
- disable_irq(omap_kp->irq);
- kp_enable = state;
+ scoped_guard(mutex, &kp_enable_mutex) {
+ if (state != kp_enable) {
+ if (state)
+ enable_irq(omap_kp->irq);
+ else
+ disable_irq(omap_kp->irq);
+ kp_enable = state;
+ }
}
- mutex_unlock(&kp_enable_mutex);
return strnlen(buf, count);
}
static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, omap_kp_enable_show, omap_kp_enable_store);
-#ifdef CONFIG_PM
-static int omap_kp_suspend(struct platform_device *dev, pm_message_t state)
-{
- /* Nothing yet */
-
- return 0;
-}
-
-static int omap_kp_resume(struct platform_device *dev)
-{
- /* Nothing yet */
-
- return 0;
-}
-#else
-#define omap_kp_suspend NULL
-#define omap_kp_resume NULL
-#endif
+static struct attribute *omap_kp_attrs[] = {
+ &dev_attr_enable.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(omap_kp);
static int omap_kp_probe(struct platform_device *pdev)
{
struct omap_kp *omap_kp;
struct input_dev *input_dev;
- struct omap_kp_platform_data *pdata = pdev->dev.platform_data;
- int i, col_idx, row_idx, ret;
+ struct omap_kp_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ int ret;
unsigned int row_shift, keycodemax;
if (!pdata->rows || !pdata->cols || !pdata->keymap_data) {
@@ -260,8 +193,7 @@ static int omap_kp_probe(struct platform_device *pdev)
row_shift = get_count_order(pdata->cols);
keycodemax = pdata->rows << row_shift;
- omap_kp = kzalloc(sizeof(struct omap_kp) +
- keycodemax * sizeof(unsigned short), GFP_KERNEL);
+ omap_kp = kzalloc(struct_size(omap_kp, keymap, keycodemax), GFP_KERNEL);
input_dev = input_allocate_device();
if (!omap_kp || !input_dev) {
kfree(omap_kp);
@@ -279,26 +211,14 @@ static int omap_kp_probe(struct platform_device *pdev)
if (pdata->delay)
omap_kp->delay = pdata->delay;
- if (pdata->row_gpios && pdata->col_gpios) {
- row_gpios = pdata->row_gpios;
- col_gpios = pdata->col_gpios;
- }
-
omap_kp->rows = pdata->rows;
omap_kp->cols = pdata->cols;
- col_idx = 0;
- row_idx = 0;
-
- setup_timer(&omap_kp->timer, omap_kp_timer, (unsigned long)omap_kp);
+ timer_setup(&omap_kp->timer, omap_kp_timer, 0);
/* get the irq and init timer*/
- tasklet_enable(&kp_tasklet);
kp_tasklet.data = (unsigned long) omap_kp;
-
- ret = device_create_file(&pdev->dev, &dev_attr_enable);
- if (ret < 0)
- goto err2;
+ tasklet_enable(&kp_tasklet);
/* setup input device */
input_dev->name = "omap-keypad";
@@ -317,12 +237,12 @@ static int omap_kp_probe(struct platform_device *pdev)
pdata->rows, pdata->cols,
omap_kp->keymap, input_dev);
if (ret < 0)
- goto err3;
+ goto err2;
ret = input_register_device(omap_kp->input);
if (ret < 0) {
printk(KERN_ERR "Unable to register omap-keypad input device\n");
- goto err3;
+ goto err2;
}
if (pdata->dbounce)
@@ -334,30 +254,23 @@ static int omap_kp_probe(struct platform_device *pdev)
if (omap_kp->irq >= 0) {
if (request_irq(omap_kp->irq, omap_kp_interrupt, 0,
"omap-keypad", omap_kp) < 0)
- goto err4;
+ goto err3;
}
omap_writew(0, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
return 0;
-err4:
+err3:
input_unregister_device(omap_kp->input);
input_dev = NULL;
-err3:
- device_remove_file(&pdev->dev, &dev_attr_enable);
err2:
- for (i = row_idx - 1; i >= 0; i--)
- gpio_free(row_gpios[i]);
- for (i = col_idx - 1; i >= 0; i--)
- gpio_free(col_gpios[i]);
-
kfree(omap_kp);
input_free_device(input_dev);
return -EINVAL;
}
-static int omap_kp_remove(struct platform_device *pdev)
+static void omap_kp_remove(struct platform_device *pdev)
{
struct omap_kp *omap_kp = platform_get_drvdata(pdev);
@@ -366,25 +279,21 @@ static int omap_kp_remove(struct platform_device *pdev)
omap_writew(1, OMAP1_MPUIO_BASE + OMAP_MPUIO_KBD_MASKIT);
free_irq(omap_kp->irq, omap_kp);
- del_timer_sync(&omap_kp->timer);
+ timer_shutdown_sync(&omap_kp->timer);
tasklet_kill(&kp_tasklet);
/* unregister everything */
input_unregister_device(omap_kp->input);
kfree(omap_kp);
-
- return 0;
}
static struct platform_driver omap_kp_driver = {
.probe = omap_kp_probe,
.remove = omap_kp_remove,
- .suspend = omap_kp_suspend,
- .resume = omap_kp_resume,
.driver = {
.name = "omap-keypad",
- .owner = THIS_MODULE,
+ .dev_groups = omap_kp_groups,
},
};
module_platform_driver(omap_kp_driver);
generated by cgit (git 2.34.1) at 2025-12-25 08:53:13 +0000