input: samsung-keypad: Add device tree support
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
Kukjin Kim
Родитель
8742e0441d
Коммит
b3d6ac3e5f
|
|
@ -0,0 +1,88 @@
|
|||
* Samsung's Keypad Controller device tree bindings
|
||||
|
||||
Samsung's Keypad controller is used to interface a SoC with a matrix-type
|
||||
keypad device. The keypad controller supports multiple row and column lines.
|
||||
A key can be placed at each intersection of a unique row and a unique column.
|
||||
The keypad controller can sense a key-press and key-release and report the
|
||||
event using a interrupt to the cpu.
|
||||
|
||||
Required SoC Specific Properties:
|
||||
- compatible: should be one of the following
|
||||
- "samsung,s3c6410-keypad": For controllers compatible with s3c6410 keypad
|
||||
controller.
|
||||
- "samsung,s5pv210-keypad": For controllers compatible with s5pv210 keypad
|
||||
controller.
|
||||
|
||||
- reg: physical base address of the controller and length of memory mapped
|
||||
region.
|
||||
|
||||
- interrupts: The interrupt number to the cpu.
|
||||
|
||||
Required Board Specific Properties:
|
||||
- samsung,keypad-num-rows: Number of row lines connected to the keypad
|
||||
controller.
|
||||
|
||||
- samsung,keypad-num-columns: Number of column lines connected to the
|
||||
keypad controller.
|
||||
|
||||
- row-gpios: List of gpios used as row lines. The gpio specifier for
|
||||
this property depends on the gpio controller to which these row lines
|
||||
are connected.
|
||||
|
||||
- col-gpios: List of gpios used as column lines. The gpio specifier for
|
||||
this property depends on the gpio controller to which these column
|
||||
lines are connected.
|
||||
|
||||
- Keys represented as child nodes: Each key connected to the keypad
|
||||
controller is represented as a child node to the keypad controller
|
||||
device node and should include the following properties.
|
||||
- keypad,row: the row number to which the key is connected.
|
||||
- keypad,column: the column number to which the key is connected.
|
||||
- linux,code: the key-code to be reported when the key is pressed
|
||||
and released.
|
||||
|
||||
Optional Properties specific to linux:
|
||||
- linux,keypad-no-autorepeat: do no enable autorepeat feature.
|
||||
- linux,keypad-wakeup: use any event on keypad as wakeup event.
|
||||
|
||||
|
||||
Example:
|
||||
keypad@100A0000 {
|
||||
compatible = "samsung,s5pv210-keypad";
|
||||
reg = <0x100A0000 0x100>;
|
||||
interrupts = <173>;
|
||||
samsung,keypad-num-rows = <2>;
|
||||
samsung,keypad-num-columns = <8>;
|
||||
linux,input-no-autorepeat;
|
||||
linux,input-wakeup;
|
||||
|
||||
row-gpios = <&gpx2 0 3 3 0
|
||||
&gpx2 1 3 3 0>;
|
||||
|
||||
col-gpios = <&gpx1 0 3 0 0
|
||||
&gpx1 1 3 0 0
|
||||
&gpx1 2 3 0 0
|
||||
&gpx1 3 3 0 0
|
||||
&gpx1 4 3 0 0
|
||||
&gpx1 5 3 0 0
|
||||
&gpx1 6 3 0 0
|
||||
&gpx1 7 3 0 0>;
|
||||
|
||||
key_1 {
|
||||
keypad,row = <0>;
|
||||
keypad,column = <3>;
|
||||
linux,code = <2>;
|
||||
};
|
||||
|
||||
key_2 {
|
||||
keypad,row = <0>;
|
||||
keypad,column = <4>;
|
||||
linux,code = <3>;
|
||||
};
|
||||
|
||||
key_3 {
|
||||
keypad,row = <0>;
|
||||
keypad,column = <5>;
|
||||
linux,code = <4>;
|
||||
};
|
||||
};
|
||||
|
|
@ -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
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче