[U-Boot] [PATCH v4 03/19] net: sun8i-emac: support new pinctrl DT bindings

[Andre Przywara]

The Linux kernel driver for the Allwinner pin controller gained support
for generic properties, which are now also used in the DTs.
The sun8i-emac Ethernet driver for new Allwinner MACs reads the pins from
the DT, but so far only supported the old binding.
Update the parsing routine to cope with both the old and new bindings,
so that the newer DTs can be used with U-Boot and its Ethernet driver.

Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Acked-by: Maxime Ripard <maxime.ripard at bootlin.com>
---
 drivers/net/sun8i_emac.c | 52 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 39 insertions(+), 13 deletions(-)

diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
index be43472b1a..c8c8ef73e9 100644
--- a/drivers/net/sun8i_emac.c
+++ b/drivers/net/sun8i_emac.c
@@ -21,6 +21,7 @@
 #include <malloc.h>
 #include <miiphy.h>
 #include <net.h>
+#include <dt-bindings/pinctrl/sun4i-a10.h>
 #ifdef CONFIG_DM_GPIO
 #include <asm-generic/gpio.h>
 #endif
@@ -465,30 +466,55 @@ static int parse_phy_pins(struct udevice *dev)
 	}
 
 	drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
-					     "allwinner,drive", 4);
-	pull = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
-					    "allwinner,pull", 0);
+					     "drive-strength", ~0);
+	if (drive != ~0) {
+		if (drive <= 10)
+			drive = SUN4I_PINCTRL_10_MA;
+		else if (drive <= 20)
+			drive = SUN4I_PINCTRL_20_MA;
+		else if (drive <= 30)
+			drive = SUN4I_PINCTRL_30_MA;
+		else
+			drive = SUN4I_PINCTRL_40_MA;
+	} else {
+		drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
+						     "allwinner,drive", 4);
+	}
+
+	if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-up", NULL))
+		pull = SUN4I_PINCTRL_PULL_UP;
+	else if (fdt_get_property(gd->fdt_blob, offset, "bias-disable", NULL))
+		pull = SUN4I_PINCTRL_NO_PULL;
+	else if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-down", NULL))
+		pull = SUN4I_PINCTRL_PULL_DOWN;
+	else
+		pull = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
+						    "allwinner,pull", 0);
 	for (i = 0; ; i++) {
 		int pin;
 
 		pin_name = fdt_stringlist_get(gd->fdt_blob, offset,
 					      "allwinner,pins", i, NULL);
-		if (!pin_name)
-			break;
-		if (pin_name[0] != 'P')
-			continue;
-		pin = (pin_name[1] - 'A') << 5;
-		if (pin >= 26 << 5)
+		if (!pin_name) {
+			pin_name = fdt_stringlist_get(gd->fdt_blob, offset,
+						      "pins", i, NULL);
+			if (!pin_name)
+				break;
+		}
+
+		pin = sunxi_name_to_gpio(pin_name);
+		if (pin < 0)
 			continue;
-		pin += simple_strtol(&pin_name[2], NULL, 10);
 
 		sunxi_gpio_set_cfgpin(pin, SUN8I_GPD8_GMAC);
-		sunxi_gpio_set_drv(pin, drive);
-		sunxi_gpio_set_pull(pin, pull);
+		if (drive != ~0)
+			sunxi_gpio_set_drv(pin, drive);
+		if (pull != ~0)
+			sunxi_gpio_set_pull(pin, pull);
 	}
 
 	if (!i) {
-		printf("WARNING: emac: cannot find allwinner,pins property\n");
+		printf("WARNING: emac: cannot find pins property\n");
 		return -2;
 	}
 
-- 
2.14.1