From a1f466a9400a5e9570909414af7dc4681284c444 Mon Sep 17 00:00:00 2001
From: Max Krummenacher <max.krummenacher@toradex.com>
Date: Wed, 17 Jan 2024 11:16:46 +0100
Subject: [PATCH] board: verdin-am62: improve comment on usb phy core voltage
TI recommends to clear the bit independent of the used voltage.
So the comment which claims to do it due to the core voltage
at 0.85V is bogus.
See https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1252724/am625-usb-phy-core-voltage-selection-and-vdda_core_usb-mismatch
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
---
board/toradex/verdin-am62/verdin-am62.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/board/toradex/verdin-am62/verdin-am62.c b/board/toradex/verdin-am62/verdin-am62.c
index 2718263eb1..e948fc16ba 100644
--- a/board/toradex/verdin-am62/verdin-am62.c
+++ b/board/toradex/verdin-am62/verdin-am62.c
@@ -102,12 +102,13 @@ void spl_board_init(void)
{
u32 val;
- /* Set USB0 PHY core voltage to 0.85V */
+ /* Clear USB0_PHY_CTRL_CORE_VOLTAGE */
+ /* TI recommends to clear the bit independent of VDDA_CORE_USB */
val = readl(CTRLMMR_USB0_PHY_CTRL);
val &= ~(CORE_VOLTAGE);
writel(val, CTRLMMR_USB0_PHY_CTRL);
- /* Set USB1 PHY core voltage to 0.85V */
+ /* Clear USB1_PHY_CTRL_CORE_VOLTAGE */
val = readl(CTRLMMR_USB1_PHY_CTRL);
val &= ~(CORE_VOLTAGE);
writel(val, CTRLMMR_USB1_PHY_CTRL);
--
2.39.5