Input: navpoint - convert to use GPIO descriptor

The Navpoint driver uses a GPIO line, convert this to use
a GPIO descriptor. There are no in-kernel users but out of tree
users can easily be added or converted using a GPIO descriptor
table as with numerous other drivers.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231129-descriptors-input-v1-1-9433162914a3@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/navpoint.c b/drivers/input/mouse/navpoint.c
index c00dc1275da23daebb21110749f3c3f75431d075..ba757783c258aaddef4d6b882282451df70e2528 100644 (file)
--- a/drivers/input/mouse/navpoint.c
+++ b/drivers/input/mouse/navpoint.c
@@ -10,7 +10,7 @@
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/input.h>
 #include <linux/input/navpoint.h>
 #include <linux/interrupt.h>
@@ -32,7 +32,7 @@ struct navpoint {
        struct ssp_device       *ssp;
        struct input_dev        *input;
        struct device           *dev;
-       int                     gpio;
+       struct gpio_desc        *gpiod;
        int                     index;
        u8                      data[1 + HEADER_LENGTH(0xff)];
 };
@@ -170,16 +170,14 @@ static void navpoint_up(struct navpoint *navpoint)
                dev_err(navpoint->dev,
                        "timeout waiting for SSSR[CSS] to clear\n");
 
-       if (gpio_is_valid(navpoint->gpio))
-               gpio_set_value(navpoint->gpio, 1);
+       gpiod_set_value(navpoint->gpiod, 1);
 }
 
 static void navpoint_down(struct navpoint *navpoint)
 {
        struct ssp_device *ssp = navpoint->ssp;
 
-       if (gpio_is_valid(navpoint->gpio))
-               gpio_set_value(navpoint->gpio, 0);
+       gpiod_set_value(navpoint->gpiod, 0);
 
        pxa_ssp_write_reg(ssp, SSCR0, 0);
 
@@ -216,18 +214,9 @@ static int navpoint_probe(struct platform_device *pdev)
                return -EINVAL;
        }
 
-       if (gpio_is_valid(pdata->gpio)) {
-               error = gpio_request_one(pdata->gpio, GPIOF_OUT_INIT_LOW,
-                                        "SYNAPTICS_ON");
-               if (error)
-                       return error;
-       }
-
        ssp = pxa_ssp_request(pdata->port, pdev->name);
-       if (!ssp) {
-               error = -ENODEV;
-               goto err_free_gpio;
-       }
+       if (!ssp)
+               return -ENODEV;
 
        /* HaRET does not disable devices before jumping into Linux */
        if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) {
@@ -242,10 +231,18 @@ static int navpoint_probe(struct platform_device *pdev)
                goto err_free_mem;
        }
 
+       navpoint->gpiod = gpiod_get_optional(&pdev->dev,
+                                            NULL, GPIOD_OUT_LOW);
+       if (IS_ERR(navpoint->gpiod)) {
+               error = PTR_ERR(navpoint->gpiod);
+               dev_err(&pdev->dev, "error getting GPIO\n");
+               goto err_free_mem;
+       }
+       gpiod_set_consumer_name(navpoint->gpiod, "SYNAPTICS_ON");
+
        navpoint->ssp = ssp;
        navpoint->input = input;
        navpoint->dev = &pdev->dev;
-       navpoint->gpio = pdata->gpio;
 
        input->name = pdev->name;
        input->dev.parent = &pdev->dev;
@@ -288,17 +285,12 @@ err_free_mem:
        input_free_device(input);
        kfree(navpoint);
        pxa_ssp_free(ssp);
-err_free_gpio:
-       if (gpio_is_valid(pdata->gpio))
-               gpio_free(pdata->gpio);
 
        return error;
 }
 
 static void navpoint_remove(struct platform_device *pdev)
 {
-       const struct navpoint_platform_data *pdata =
-                                       dev_get_platdata(&pdev->dev);
        struct navpoint *navpoint = platform_get_drvdata(pdev);
        struct ssp_device *ssp = navpoint->ssp;
 
@@ -308,9 +300,6 @@ static void navpoint_remove(struct platform_device *pdev)
        kfree(navpoint);
 
        pxa_ssp_free(ssp);
-
-       if (gpio_is_valid(pdata->gpio))
-               gpio_free(pdata->gpio);
 }
 
 static int navpoint_suspend(struct device *dev)

diff --git a/include/linux/input/navpoint.h b/include/linux/input/navpoint.h
index d464ffb4db52b9654074af09264754043a30beab..5192ae3f5ec1b67738fb31d34a34cd97e19f3ab3 100644 (file)
--- a/include/linux/input/navpoint.h
+++ b/include/linux/input/navpoint.h
@@ -5,5 +5,4 @@
 
 struct navpoint_platform_data {
        int             port;           /* PXA SSP port for pxa_ssp_request() */
-       int             gpio;           /* GPIO for power on/off */
 };