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input: gpio-keys: Add devicetree probe support 

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2014-02-14 11:55:02 +01:00
parent 2c194e5822
commit 7a037a952d
1 changed files with 77 additions and 13 deletions
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90
drivers/input/gpio_keys.c
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@ -11,6 +11,8 @@
#include <gpio_keys.h>
#include <poller.h>
#include <gpio.h>
#include <of_gpio.h>
#include <input/keyboard.h>
struct gpio_key {
int code;
@ -31,6 +33,8 @@ struct gpio_keys {
struct kfifo *recv_fifo;
struct poller_struct poller;
struct console_device cdev;
int use_keycodes;
};
static inline struct gpio_keys *
@ -77,33 +81,29 @@ static int gpio_keys_getc(struct console_device *cdev)
struct gpio_keys *gk = cdev_to_gk_pdata(cdev);
kfifo_get(gk->recv_fifo, (u_char*)&code, sizeof(int));
return code;
if (IS_ENABLED(CONFIG_OFDEVICE) && gk->use_keycodes)
return keycode_bb_keys[code];
else
return code;
}
static int __init gpio_keys_probe(struct device_d *dev)
static int gpio_keys_probe_pdata(struct gpio_keys *gk, struct device_d *dev)
{
int ret, i, gpio;
struct gpio_keys_platform_data *pdata;
struct console_device *cdev;
struct gpio_keys *gk;
int i;
pdata = dev->platform_data;
if (!pdata) {
/* small (so we copy it) but critical! */
pr_err("missing platform_data\n");
dev_err(dev, "missing platform_data\n");
return -ENODEV;
}
gk = xzalloc(sizeof(*gk));
gk->fifo_size = 50;
if (pdata->fifo_size)
gk->fifo_size = pdata->fifo_size;
gk->recv_fifo = kfifo_alloc(pdata->fifo_size);
gk->buttons = xzalloc(pdata->nbuttons * sizeof(*gk->buttons));
gk->nbuttons = pdata->nbuttons;
@ -113,7 +113,65 @@ static int __init gpio_keys_probe(struct device_d *dev)
gk->buttons[i].active_low = pdata->buttons[i].active_low;
}
for (i = 0; i < pdata->nbuttons; i++) {
return 0;
}
static int gpio_keys_probe_dt(struct gpio_keys *gk, struct device_d *dev)
{
struct device_node *npkey, *np = dev->device_node;
int i = 0, ret;
if (!IS_ENABLED(CONFIG_OFDEVICE))
return -ENODEV;
gk->nbuttons = of_get_child_count(np);
gk->buttons = xzalloc(gk->nbuttons * sizeof(*gk->buttons));
for_each_child_of_node(np, npkey) {
enum of_gpio_flags gpioflags;
uint32_t keycode;
gk->buttons[i].gpio = of_get_named_gpio_flags(npkey, "gpios", 0, &gpioflags);
if (gk->buttons[i].gpio < 0)
return gk->buttons[i].gpio;
if (gpioflags & OF_GPIO_ACTIVE_LOW)
gk->buttons[i].active_low = 1;
ret = of_property_read_u32(npkey, "linux,code", &keycode);
if (ret)
return ret;
gk->buttons[i].code = keycode;
i++;
}
gk->use_keycodes = 1;
return 0;
}
static int __init gpio_keys_probe(struct device_d *dev)
{
int ret, i, gpio;
struct console_device *cdev;
struct gpio_keys *gk;
gk = xzalloc(sizeof(*gk));
gk->fifo_size = 50;
if (dev->device_node)
ret = gpio_keys_probe_dt(gk, dev);
else
ret = gpio_keys_probe_pdata(gk, dev);
if (ret)
return ret;
gk->recv_fifo = kfifo_alloc(gk->fifo_size);
for (i = 0; i < gk->nbuttons; i++) {
gpio = gk->buttons[i].gpio;
ret = gpio_request(gpio, "gpio_keys");
if (ret) {
@ -137,8 +195,14 @@ static int __init gpio_keys_probe(struct device_d *dev)
return poller_register(&gk->poller);
}
static struct of_device_id key_gpio_of_ids[] = {
{ .compatible = "gpio-keys", },
{ }
};
static struct driver_d gpio_keys_driver = {
.name = "gpio_keys",
.probe = gpio_keys_probe,
.of_compatible = DRV_OF_COMPAT(key_gpio_of_ids),
};
device_platform_driver(gpio_keys_driver);