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board: verdin-am62: improve comment on usb phy core voltage

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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>
This commit is contained in:
Max Krummenacher
2024-01-17 11:16:46 +01:00
committed by Tom Rini
parent e2e69291ee
commit a1f466a940
1 changed files with 3 additions and 2 deletions
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5
board/toradex/verdin-am62/verdin-am62.c
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@@ -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);