Re: [PATCH 13/13] input: gpio_keys_polled - Make use of device property API

Dmitry Torokhov
2014-10-07T17:30:06Z

On Tue, Oct 07, 2014 at 02:19:20AM +0200, Rafael J. Wysocki wrote:
> From: Aaron Lu <aaron.lu@intel.com>
>
> Make use of device property API in this driver so that both OF based
> system and ACPI based system can use this driver.
>
> Signed-off-by: Aaron Lu <aaron.lu@intel.com>
> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

> ---
> drivers/input/keyboard/gpio_keys_polled.c | 81 +++++++++++-------------------
> 1 file changed, 31 insertions(+), 50 deletions(-)
>
> Index: linux-pm/drivers/input/keyboard/gpio_keys_polled.c
> ===================================================================
> --- linux-pm.orig/drivers/input/keyboard/gpio_keys_polled.c
> +++ linux-pm/drivers/input/keyboard/gpio_keys_polled.c
> @@ -25,9 +25,7 @@
> #include <linux/gpio.h>
> #include <linux/gpio/consumer.h>
> #include <linux/gpio_keys.h>
> -#include <linux/of.h>
> -#include <linux/of_platform.h>
> -#include <linux/of_gpio.h>
> +#include <linux/property.h>
>
> #define DRV_NAME "gpio-keys-polled"
>
> @@ -102,21 +100,15 @@ static void gpio_keys_polled_close(struc
> pdata->disable(bdev->dev);
> }
>
> -#ifdef CONFIG_OF
> static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct device *dev)
> {
> - struct device_node *node, *pp;
> struct gpio_keys_platform_data *pdata;
> struct gpio_keys_button *button;
> + void *child;
> int error;
> int nbuttons;
> - int i;
> -
> - node = dev->of_node;
> - if (!node)
> - return NULL;
>
> - nbuttons = of_get_child_count(node);
> + nbuttons = device_get_child_node_count(dev);
> if (nbuttons == 0)
> return NULL;
>
> @@ -126,52 +118,50 @@ static struct gpio_keys_platform_data *g
> return ERR_PTR(-ENOMEM);
>
> pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
> - pdata->nbuttons = nbuttons;
>
> - pdata->rep = !!of_get_property(node, "autorepeat", NULL);
> - of_property_read_u32(node, "poll-interval", &pdata->poll_interval);
> + pdata->rep = !device_get_property(dev, "autorepeat", NULL);
> + device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);
>
> - i = 0;
> - for_each_child_of_node(node, pp) {
> - int gpio;
> - enum of_gpio_flags flags;
> -
> - if (!of_find_property(pp, "gpios", NULL)) {
> - pdata->nbuttons--;
> - dev_warn(dev, "Found button without gpios\n");
> - continue;
> - }
> + device_for_each_child_node(dev, child) {
> + struct gpio_desc *desc;
>
> - gpio = of_get_gpio_flags(pp, 0, &flags);
> - if (gpio < 0) {
> - error = gpio;
> + desc = devm_get_named_gpiod_from_child(dev, child, "gpios", 0);
> + if (IS_ERR(desc)) {
> + error = PTR_ERR(desc);
> if (error != -EPROBE_DEFER)
> dev_err(dev,
> "Failed to get gpio flags, error: %d\n",
> error);
> + device_put_child_node(dev, child);
> return ERR_PTR(error);
> }
>
> - button = &pdata->buttons[i++];
> -
> - button->gpio = gpio;
> - button->active_low = flags & OF_GPIO_ACTIVE_LOW;
> + button = &pdata->buttons[pdata->nbuttons++];
> + button->gpiod = desc;
>
> - if (of_property_read_u32(pp, "linux,code", &button->code)) {
> - dev_err(dev, "Button without keycode: 0x%x\n",
> - button->gpio);
> + if (device_child_property_read_u32(dev, child, "linux,code",
> + &button->code)) {
> + dev_err(dev, "Button without keycode: %d\n",
> + pdata->nbuttons - 1);
> + device_put_child_node(dev, child);
> return ERR_PTR(-EINVAL);
> }
>
> - button->desc = of_get_property(pp, "label", NULL);
> + device_child_property_read_string(dev, child, "label",
> + &button->desc);
>
> - if (of_property_read_u32(pp, "linux,input-type", &button->type))
> + if (device_child_property_read_u32(dev, child,
> + "linux,input-type",
> + &button->type))
> button->type = EV_KEY;
>
> - button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
> -
> - if (of_property_read_u32(pp, "debounce-interval",
> - &button->debounce_interval))
> + button->wakeup = !device_get_child_property(dev, child,
> + "gpio-key,wakeup",
> + NULL);
> +
> + if (device_child_property_read_u32(dev, child,
> + "debounce-interval",
> + &button->debounce_interval))
> button->debounce_interval = 5;
> }
>
> @@ -187,15 +177,6 @@ static const struct of_device_id gpio_ke
> };
> MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
>
> -#else
> -
> -static inline struct gpio_keys_platform_data *
> -gpio_keys_polled_get_devtree_pdata(struct device *dev)
> -{
> - return NULL;
> -}
> -#endif
> -
> static int gpio_keys_polled_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> @@ -323,7 +304,7 @@ static struct platform_driver gpio_keys_
> .driver = {
> .name = DRV_NAME,
> .owner = THIS_MODULE,
> - .of_match_table = of_match_ptr(gpio_keys_polled_of_match),
> + .of_match_table = gpio_keys_polled_of_match,
> },
> };
> module_platform_driver(gpio_keys_polled_driver);
>

--
Dmitry