From: Max Krummenacher max.krummenacher@toradex.com
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/12...
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 d09dda5bccc..4e912b5f32f 100644 --- a/board/toradex/verdin-am62/verdin-am62.c +++ b/board/toradex/verdin-am62/verdin-am62.c @@ -101,12 +101,13 @@ 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);