net: phy: mdio-gpio: Add #defines for the GPIO index's

The GPIOs are described in device tree using a list, without names.
Add defines to indicate what each index in the list means. These
defines should also be used by platform devices passing GPIOs via a
GPIO lookup table.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 16 insertions, 3 deletions

diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 74b982835ac1..281c905ef9fd 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -24,6 +24,8 @@
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
+#include <linux/mdio-bitbang.h>
+#include <linux/mdio-gpio.h>
 #include <linux/gpio.h>
 #include <linux/platform_data/mdio-gpio.h>
 
@@ -38,15 +40,17 @@ struct mdio_gpio_info {
 static int mdio_gpio_get_data(struct device *dev,
                               struct mdio_gpio_info *bitbang)
 {
-        bitbang->mdc = devm_gpiod_get_index(dev, NULL, 0, GPIOD_OUT_LOW);
+        bitbang->mdc = devm_gpiod_get_index(dev, NULL, MDIO_GPIO_MDC,
+                                            GPIOD_OUT_LOW);
         if (IS_ERR(bitbang->mdc))
                 return PTR_ERR(bitbang->mdc);
 
-        bitbang->mdio = devm_gpiod_get_index(dev, NULL, 1, GPIOD_IN);
+        bitbang->mdio = devm_gpiod_get_index(dev, NULL, MDIO_GPIO_MDIO,
+                                             GPIOD_IN);
         if (IS_ERR(bitbang->mdio))
                 return PTR_ERR(bitbang->mdio);
 
-        bitbang->mdo = devm_gpiod_get_index_optional(dev, NULL, 2,
+        bitbang->mdo = devm_gpiod_get_index_optional(dev, NULL, MDIO_GPIO_MDO,
                                                      GPIOD_OUT_LOW);
         return PTR_ERR_OR_ZERO(bitbang->mdo);
 }
diff --git a/include/linux/mdio-gpio.h b/include/linux/mdio-gpio.h
new file mode 100644
index 000000000000..cea443a672cb
--- /dev/null
+++ b/include/linux/mdio-gpio.h
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_MDIO_GPIO_H
+#define __LINUX_MDIO_GPIO_H
+
+#define MDIO_GPIO_MDC   0
+#define MDIO_GPIO_MDIO  1
+#define MDIO_GPIO_MDO   2
+
+#endif