mdio-mux-gpio: Use GPIO descriptor interface and new gpiod_set_array function

Convert mdio-mux-gpio to the GPIO descriptor interface and use the new
gpiod_set_array function to set all output signals simultaneously.

Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 13 insertions, 24 deletions

diff --git a/drivers/net/phy/mdio-mux-gpio.c b/drivers/net/phy/mdio-mux-gpio.c
index 096695163491..1eaf81efde24 100644
--- a/drivers/net/phy/mdio-mux-gpio.c
+++ b/drivers/net/phy/mdio-mux-gpio.c
@@ -14,13 +14,13 @@
 #include <linux/mdio-mux.h>
 #include <linux/of_gpio.h>
 
-#define DRV_VERSION "1.0"
+#define DRV_VERSION "1.1"
 #define DRV_DESCRIPTION "GPIO controlled MDIO bus multiplexer driver"
 
 #define MDIO_MUX_GPIO_MAX_BITS 8
 
 struct mdio_mux_gpio_state {
-        int gpio[MDIO_MUX_GPIO_MAX_BITS];
+        struct gpio_desc *gpio[MDIO_MUX_GPIO_MAX_BITS];
         unsigned int num_gpios;
         void *mux_handle;
 };
@@ -28,29 +28,23 @@ struct mdio_mux_gpio_state {
 static int mdio_mux_gpio_switch_fn(int current_child, int desired_child,
                                    void *data)
 {
-        int change;
+        int values[MDIO_MUX_GPIO_MAX_BITS];
         unsigned int n;
         struct mdio_mux_gpio_state *s = data;
 
         if (current_child == desired_child)
                 return 0;
 
-        change = current_child == -1 ? -1 : current_child ^ desired_child;
-
         for (n = 0; n < s->num_gpios; n++) {
-                if (change & 1)
-                        gpio_set_value_cansleep(s->gpio[n],
-                                                (desired_child & 1) != 0);
-                change >>= 1;
-                desired_child >>= 1;
+                values[n] = (desired_child >> n) & 1;
         }
+        gpiod_set_array_cansleep(s->num_gpios, s->gpio, values);
 
         return 0;
 }
 
 static int mdio_mux_gpio_probe(struct platform_device *pdev)
 {
-        enum of_gpio_flags f;
         struct mdio_mux_gpio_state *s;
         int num_gpios;
         unsigned int n;
@@ -70,22 +64,14 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
         s->num_gpios = num_gpios;
 
         for (n = 0; n < num_gpios; ) {
-                int gpio = of_get_gpio_flags(pdev->dev.of_node, n, &f);
-                if (gpio < 0) {
-                        r = (gpio == -ENODEV) ? -EPROBE_DEFER : gpio;
+                struct gpio_desc *gpio = gpiod_get_index(&pdev->dev, NULL, n,
+                                                         GPIOD_OUT_LOW);
+                if (IS_ERR(gpio)) {
+                        r = PTR_ERR(gpio);
                         goto err;
                 }
                 s->gpio[n] = gpio;
-
                 n++;
-
-                r = gpio_request(gpio, "mdio_mux_gpio");
-                if (r)
-                        goto err;
-
-                r = gpio_direction_output(gpio, 0);
-                if (r)
-                        goto err;
         }
 
         r = mdio_mux_init(&pdev->dev,
@@ -98,15 +84,18 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
 err:
         while (n) {
                 n--;
-                gpio_free(s->gpio[n]);
+                gpiod_put(s->gpio[n]);
         }
         return r;
 }
 
 static int mdio_mux_gpio_remove(struct platform_device *pdev)
 {
+        unsigned int n;
         struct mdio_mux_gpio_state *s = dev_get_platdata(&pdev->dev);
         mdio_mux_uninit(s->mux_handle);
+        for (n = 0; n < s->num_gpios; n++)
+                gpiod_put(s->gpio[n]);
         return 0;
 }