uboot-sunxi: add T113-S3 support

[openwrt/staging/wigyori.git] / package / boot / uboot-sunxi / patches / 4002-net-sunxi_emac-chase-DT-nodes-to-find-PHY-regulator.patch

diff --git a/package/boot/uboot-sunxi/patches/4002-net-sunxi_emac-chase-DT-nodes-to-find-PHY-regulator.patch b/package/boot/uboot-sunxi/patches/4002-net-sunxi_emac-chase-DT-nodes-to-find-PHY-regulator.patch
new file mode 100644 (file)
index 0000000..5ea3560
--- /dev/null
+++ b/package/boot/uboot-sunxi/patches/4002-net-sunxi_emac-chase-DT-nodes-to-find-PHY-regulator.patch
@@ -0,0 +1,102 @@
+From fbdfae3efbd295bd4ea4ad02c2af1a8dca649238 Mon Sep 17 00:00:00 2001
+From: Andre Przywara <andre.przywara@arm.com>
+Date: Fri, 21 Jul 2023 14:45:47 +0100
+Subject: [PATCH 4002/4052] net: sunxi_emac: chase DT nodes to find PHY
+ regulator
+
+At the moment the sun4i EMAC driver relies on hardcoded CONFIG_MACPWR
+Kconfig symbols to enable potential PHY regulators. As we want to get rid
+of those, we need to find the regulator by chasing up the DT.
+
+The sun4i-emac binding puts the PHY regulator into the MDIO node, which
+is the parent of the PHY device. U-Boot does not have (and does not
+need) an MDIO driver, so we need to chase down the regulator through the
+EMAC node: we follow the "phy-handle" property to find the PHY node,
+then go up to its parent, where we find the "phy-supply" link to the
+regulator. Let U-Boot find the associated regulator device, and put that
+into the private device struct, so we can find and enable the regulator
+at probe time, later.
+
+Signed-off-by: Andre Przywara <andre.przywara@arm.com>
+Reviewed-by: Sam Edwards <CFSworks@gmail.com>
+---
+ drivers/net/sunxi_emac.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/drivers/net/sunxi_emac.c b/drivers/net/sunxi_emac.c
+index 4c90d4b498..f1f0e5bbbb 100644
+--- a/drivers/net/sunxi_emac.c
++++ b/drivers/net/sunxi_emac.c
+@@ -17,6 +17,7 @@
+ #include <net.h>
+ #include <asm/io.h>
+ #include <asm/arch/clock.h>
++#include <power/regulator.h>
+ 
+ /* EMAC register  */
+ struct emac_regs {
+@@ -165,6 +166,7 @@ struct emac_eth_dev {
+       struct phy_device *phydev;
+       int link_printed;
+       uchar rx_buf[EMAC_RX_BUFSIZE];
++      struct udevice *phy_reg;
+ };
+ 
+ struct emac_rxhdr {
+@@ -572,6 +574,9 @@ static int sunxi_emac_eth_probe(struct udevice *dev)
+       if (ret)
+               return ret;
+ 
++      if (priv->phy_reg)
++              regulator_set_enable(priv->phy_reg, true);
++
+       return sunxi_emac_init_phy(priv, dev);
+ }
+ 
+@@ -585,9 +590,43 @@ static const struct eth_ops sunxi_emac_eth_ops = {
+ static int sunxi_emac_eth_of_to_plat(struct udevice *dev)
+ {
+       struct eth_pdata *pdata = dev_get_plat(dev);
++      struct emac_eth_dev *priv = dev_get_priv(dev);
++      struct ofnode_phandle_args args;
++      ofnode mdio_node;
++      int ret;
+ 
+       pdata->iobase = dev_read_addr(dev);
+ 
++      /* The PHY regulator is in the MDIO node, not the EMAC or PHY node. */
++      ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0, &args);
++      if (ret) {
++              dev_err(dev, "failed to get PHY node\n");
++              return ret;
++      }
++
++      /*
++       * U-Boot does not have (and does not need) a device driver for the
++       * MDIO device, so just "pass through" that DT node to get to the
++       * regulator phandle.
++       * The PHY regulator is optional, though: ignore if we cannot find
++       * a phy-supply property.
++       */
++      mdio_node = ofnode_get_parent(args.node);
++      ret= ofnode_parse_phandle_with_args(mdio_node, "phy-supply", NULL, 0, 0,
++                                          &args);
++      if (ret && ret != -ENOENT) {
++              dev_err(dev, "failed to get PHY supply node\n");
++              return ret;
++      }
++      if (!ret) {
++              ret = uclass_get_device_by_ofnode(UCLASS_REGULATOR, args.node,
++                                                &priv->phy_reg);
++              if (ret) {
++                      dev_err(dev, "failed to get PHY regulator node\n");
++                      return ret;
++              }
++      }
++
+       return 0;
+ }
+ 
+-- 
+2.20.1
+