[PATCH] arm64: dts: renesas: r8a779g3: Set VDDQ18_25_AVB voltage on Retronix R-Car V4H Sparrow Hawk EVTB1

[Marek Vasut]

The Retronix R-Car V4H Sparrow Hawk EVTB1 uses 1V8 IO voltage supply
for VDDQ18_25_AVB power rail. Update the AVB0 pinmux to reflect the
change in IO voltage. Since the VDDQ18_25_AVB power rail is shared,
all four AVB0, AVB1, AVB2, TSN0 PFC/GPIO POC[7..4] registers have to
be configured the same way.

Correct the voltage for EVTA1 boards accordingly by patching the U-Boot
control DT in SPL.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Tom Rini <trini at konsulko.com>
---
 board/renesas/sparrowhawk/sparrowhawk.c              | 12 ++++++++++++
 .../src/arm64/renesas/r8a779g3-sparrow-hawk.dts      |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/board/renesas/sparrowhawk/sparrowhawk.c b/board/renesas/sparrowhawk/sparrowhawk.c
index 1fd7a63d2fa..58de7f25cbd 100644
--- a/board/renesas/sparrowhawk/sparrowhawk.c
+++ b/board/renesas/sparrowhawk/sparrowhawk.c
@@ -231,6 +231,18 @@ void spl_perform_fixups(struct spl_image_info *spl_image)
 		printf("Failed to disable UHS pins in MicroSD node: %d\n", err);
 		return;
 	}
+
+	offs = fdt_path_offset(blob, "/soc/pinctrl at e6050000/avb0/pins-vddq18-25-avb");
+	if (offs < 0) {
+		printf("Failed to locate AVB pinctrl node: %d\n", offs);
+		return;
+	}
+
+	err = fdt_setprop_u32(blob, offs, "power-source", 2500);
+	if (err < 0) {
+		printf("Failed to set AVB IO voltage: %d\n", err);
+		return;
+	}
 }
 #endif
 
diff --git a/dts/upstream/src/arm64/renesas/r8a779g3-sparrow-hawk.dts b/dts/upstream/src/arm64/renesas/r8a779g3-sparrow-hawk.dts
index 0abfff5fe90..2d8474395c6 100644
--- a/dts/upstream/src/arm64/renesas/r8a779g3-sparrow-hawk.dts
+++ b/dts/upstream/src/arm64/renesas/r8a779g3-sparrow-hawk.dts
@@ -529,6 +529,10 @@
 			drive-strength = <21>;
 		};
 
+		pins-vddq18-25-avb {
+			pins = "PIN_VDDQ_AVB0", "PIN_VDDQ_AVB1", "PIN_VDDQ_AVB2", "PIN_VDDQ_TSN0";
+			power-source = <1800>;
+		};
 	};
 
 	/* Page 28 / CANFD_IF */
-- 
2.47.2