A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-25 22:23:14 -04:00
Code Issues Projects Releases Packages Wiki Activity

input: samsung-keypad: Add device tree support

Browse source 
Add device tree based discovery support for Samsung's keypad controller.

Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Donghwa Lee <dh09.lee@samsung.com>
Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Thomas Abraham 2011-11-02 19:37:22 +09:00 • committed by Kukjin Kim
commit b3d6ac3e5f
2 changed files with 250 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

174
drivers/input/keyboard/samsung-keypad.c
View file

@ -21,6 +21,8 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/sched.h>
#include <plat/keypad.h>
@ -68,31 +70,26 @@ struct samsung_keypad {
wait_queue_head_t wait;
bool stopped;
int irq;
enum samsung_keypad_type type;
unsigned int row_shift;
unsigned int rows;
unsigned int cols;
unsigned int row_state[SAMSUNG_MAX_COLS];
#ifdef CONFIG_OF
int row_gpios[SAMSUNG_MAX_ROWS];
int col_gpios[SAMSUNG_MAX_COLS];
#endif
unsigned short keycodes[];
};
static int samsung_keypad_is_s5pv210(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
enum samsung_keypad_type type =
platform_get_device_id(pdev)->driver_data;
return type == KEYPAD_TYPE_S5PV210;
}
static void samsung_keypad_scan(struct samsung_keypad *keypad,
unsigned int *row_state)
{
struct device *dev = keypad->input_dev->dev.parent;
unsigned int col;
unsigned int val;
for (col = 0; col < keypad->cols; col++) {
if (samsung_keypad_is_s5pv210(dev)) {
if (keypad->type == KEYPAD_TYPE_S5PV210) {
val = S5PV210_KEYIFCOLEN_MASK;
val &= ~(1 << col) << 8;
} else {
@ -235,6 +232,126 @@ static void samsung_keypad_close(struct input_dev *input_dev)
samsung_keypad_stop(keypad);
}
#ifdef CONFIG_OF
static struct samsung_keypad_platdata *samsung_keypad_parse_dt(
struct device *dev)
{
struct samsung_keypad_platdata *pdata;
struct matrix_keymap_data *keymap_data;
uint32_t *keymap, num_rows = 0, num_cols = 0;
struct device_node *np = dev->of_node, *key_np;
unsigned int key_count = 0;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
dev_err(dev, "could not allocate memory for platform data\n");
return NULL;
}
of_property_read_u32(np, "samsung,keypad-num-rows", &num_rows);
of_property_read_u32(np, "samsung,keypad-num-columns", &num_cols);
if (!num_rows || !num_cols) {
dev_err(dev, "number of keypad rows/columns not specified\n");
return NULL;
}
pdata->rows = num_rows;
pdata->cols = num_cols;
keymap_data = devm_kzalloc(dev, sizeof(*keymap_data), GFP_KERNEL);
if (!keymap_data) {
dev_err(dev, "could not allocate memory for keymap data\n");
return NULL;
}
pdata->keymap_data = keymap_data;
for_each_child_of_node(np, key_np)
key_count++;
keymap_data->keymap_size = key_count;
keymap = devm_kzalloc(dev, sizeof(uint32_t) * key_count, GFP_KERNEL);
if (!keymap) {
dev_err(dev, "could not allocate memory for keymap\n");
return NULL;
}
keymap_data->keymap = keymap;
for_each_child_of_node(np, key_np) {
u32 row, col, key_code;
of_property_read_u32(key_np, "keypad,row", &row);
of_property_read_u32(key_np, "keypad,column", &col);
of_property_read_u32(key_np, "linux,code", &key_code);
*keymap++ = KEY(row, col, key_code);
}
if (of_get_property(np, "linux,input-no-autorepeat", NULL))
pdata->no_autorepeat = true;
if (of_get_property(np, "linux,input-wakeup", NULL))
pdata->wakeup = true;
return pdata;
}
static void samsung_keypad_parse_dt_gpio(struct device *dev,
struct samsung_keypad *keypad)
{
struct device_node *np = dev->of_node;
int gpio, ret, row, col;
for (row = 0; row < keypad->rows; row++) {
gpio = of_get_named_gpio(np, "row-gpios", row);
keypad->row_gpios[row] = gpio;
if (!gpio_is_valid(gpio)) {
dev_err(dev, "keypad row[%d]: invalid gpio %d\n",
row, gpio);
continue;
}
ret = gpio_request(gpio, "keypad-row");
if (ret)
dev_err(dev, "keypad row[%d] gpio request failed\n",
row);
}
for (col = 0; col < keypad->cols; col++) {
gpio = of_get_named_gpio(np, "col-gpios", col);
keypad->col_gpios[col] = gpio;
if (!gpio_is_valid(gpio)) {
dev_err(dev, "keypad column[%d]: invalid gpio %d\n",
col, gpio);
continue;
}
ret = gpio_request(gpio, "keypad-col");
if (ret)
dev_err(dev, "keypad column[%d] gpio request failed\n",
col);
}
}
static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
int cnt;
for (cnt = 0; cnt < keypad->rows; cnt++)
if (gpio_is_valid(keypad->row_gpios[cnt]))
gpio_free(keypad->row_gpios[cnt]);
for (cnt = 0; cnt < keypad->cols; cnt++)
if (gpio_is_valid(keypad->col_gpios[cnt]))
gpio_free(keypad->col_gpios[cnt]);
}
#else
static
struct samsung_keypad_platdata *samsung_keypad_parse_dt(struct device *dev)
{
return NULL;
}
static void samsung_keypad_dt_gpio_free(struct samsung_keypad *keypad)
{
}
#endif
static int __devinit samsung_keypad_probe(struct platform_device *pdev)
{
const struct samsung_keypad_platdata *pdata;
@ -246,7 +363,10 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
unsigned int keymap_size;
int error;
pdata = pdev->dev.platform_data;
if (pdev->dev.of_node)
pdata = samsung_keypad_parse_dt(&pdev->dev);
else
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data defined\n");
return -EINVAL;
@ -303,6 +423,16 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
keypad->cols = pdata->cols;
init_waitqueue_head(&keypad->wait);
if (pdev->dev.of_node) {
#ifdef CONFIG_OF
samsung_keypad_parse_dt_gpio(&pdev->dev, keypad);
keypad->type = of_device_is_compatible(pdev->dev.of_node,
"samsung,s5pv210-keypad");
#endif
} else {
keypad->type = platform_get_device_id(pdev)->driver_data;
}
input_dev->name = pdev->name;
input_dev->id.bustype = BUS_HOST;
input_dev->dev.parent = &pdev->dev;
@ -343,12 +473,19 @@ static int __devinit samsung_keypad_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, pdata->wakeup);
platform_set_drvdata(pdev, keypad);
if (pdev->dev.of_node) {
devm_kfree(&pdev->dev, (void *)pdata->keymap_data->keymap);
devm_kfree(&pdev->dev, (void *)pdata->keymap_data);
devm_kfree(&pdev->dev, (void *)pdata);
}
return 0;
err_free_irq:
free_irq(keypad->irq, keypad);
err_put_clk:
clk_put(keypad->clk);
samsung_keypad_dt_gpio_free(keypad);
err_unmap_base:
iounmap(keypad->base);
err_free_mem:
@ -374,6 +511,7 @@ static int __devexit samsung_keypad_remove(struct platform_device *pdev)
free_irq(keypad->irq, keypad);
clk_put(keypad->clk);
samsung_keypad_dt_gpio_free(keypad);
iounmap(keypad->base);
kfree(keypad);
@ -447,6 +585,17 @@ static const struct dev_pm_ops samsung_keypad_pm_ops = {
};
#endif
#ifdef CONFIG_OF
static const struct of_device_id samsung_keypad_dt_match[] = {
{ .compatible = "samsung,s3c6410-keypad" },
{ .compatible = "samsung,s5pv210-keypad" },
{},
};
MODULE_DEVICE_TABLE(of, samsung_keypad_dt_match);
#else
#define samsung_keypad_dt_match NULL
#endif
static struct platform_device_id samsung_keypad_driver_ids[] = {
{
.name = "samsung-keypad",
@ -465,6 +614,7 @@ static struct platform_driver samsung_keypad_driver = {
.driver = {
.name = "samsung-keypad",
.owner = THIS_MODULE,
.of_match_table = samsung_keypad_dt_match,
#ifdef CONFIG_PM
.pm = &samsung_keypad_pm_ops,
#endif