board: ti: am64x: Set the core voltage of USB PHY to 0.85V

Set the core voltage of USB PHY in AM64x to 0.85V in spl_board_init().

Signed-off-by: Aswath Govindraju <a-govindraju@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20210604163043.12811-5-a-govindraju@ti.com

diff --git a/board/ti/am64x/evm.c b/board/ti/am64x/evm.c
index 35cd9e0..cdbb9a8 100644 (file)
--- a/board/ti/am64x/evm.c
+++ b/board/ti/am64x/evm.c
@@ -152,3 +152,17 @@ int board_late_init(void)
        return 0;
 }
 #endif
+
+#define CTRLMMR_USB0_PHY_CTRL  0x43004008
+#define CORE_VOLTAGE           0x80000000
+
+#ifdef CONFIG_SPL_BOARD_INIT
+void spl_board_init(void)
+{
+       u32 val;
+       /* Set USB PHY core voltage to 0.85V */
+       val = readl(CTRLMMR_USB0_PHY_CTRL);
+       val &= ~(CORE_VOLTAGE);
+       writel(val, CTRLMMR_USB0_PHY_CTRL);
+}
+#endif