[PATCH v3 04/10] board: ti: am64x: Set the core voltage of USB PHY to 0.85V

From: Aswath Govindraju <a-govindraju@ti.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
	Praneeth Bajjuri <praneeth@ti.com>,
	Aswath Govindraju <a-govindraju@ti.com>,
	Lokesh Vutla <lokeshvutla@ti.com>,
	Dave Gerlach <d-gerlach@ti.com>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>, Suman Anna <s-anna@ti.com>,
	Keerthy <j-keerthy@ti.com>, <u-boot@lists.denx.de>
Subject: [PATCH v3 04/10] board: ti: am64x: Set the core voltage of USB PHY to 0.85V
Date: Fri, 4 Jun 2021 22:00:34 +0530	[thread overview]
Message-ID: <20210604163043.12811-5-a-govindraju@ti.com> (raw)
In-Reply-To: <20210604163043.12811-1-a-govindraju@ti.com>

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>
---
 board/ti/am64x/evm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/board/ti/am64x/evm.c b/board/ti/am64x/evm.c
index 35cd9e027c04..cdbb9a87bc44 100644
--- 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
-- 
2.17.1

