This patch adds a workaround to reset the phy one time during boot
using GPIO0 pin 10 to make sure, the Phy latches the configuration
from the input pins correctly.
Signed-off-by: Murali Karicheri <m-kariche...@ti.com>
---
.../arm/mach-keystone/include/mach/hardware-k2g.h | 3 +++
board/ti/ks2_evm/board_k2g.c | 15 +++++++++++++++
2 files changed, 18 insertions(+)
diff --git a/arch/arm/mach-keystone/include/mach/hardware-k2g.h
b/arch/arm/mach-keystone/include/mach/hardware-k2g.h
index 8b902641ec..971c081bb3 100644
--- a/arch/arm/mach-keystone/include/mach/hardware-k2g.h
+++ b/arch/arm/mach-keystone/include/mach/hardware-k2g.h
@@ -69,9 +69,12 @@
#define K2G_GPIO0_BASE 0X02603000
#define K2G_GPIO1_BASE 0X0260a000
+#define K2G_GPIO0_BANK0_BASE K2G_GPIO0_BASE + 0x10
#define K2G_GPIO1_BANK2_BASE K2G_GPIO1_BASE + 0x38
#define K2G_GPIO_DIR_OFFSET 0x0
+#define K2G_GPIO_OUTDATA_OFFSET 0x4
#define K2G_GPIO_SETDATA_OFFSET 0x8
+#define K2G_GPIO_CLRDATA_OFFSET 0xC
/* BOOTCFG RESETMUX8 */
#define KS2_RSTMUX8 (KS2_DEVICE_STATE_CTRL_BASE + 0x328)
diff --git a/board/ti/ks2_evm/board_k2g.c b/board/ti/ks2_evm/board_k2g.c
index 39a782e479..6d0fc21c67 100644
--- a/board/ti/ks2_evm/board_k2g.c
+++ b/board/ti/ks2_evm/board_k2g.c
@@ -315,6 +315,21 @@ int embedded_dtb_select(void)
BIT(9));
setbits_le32(K2G_GPIO1_BANK2_BASE + K2G_GPIO_SETDATA_OFFSET,
BIT(9));
+ } else if (board_is_k2g_ice()) {
+ /* GBE Phy workaround. For Phy to latch the input
+ * configuration, a GPIO reset is asserted at the
+ * Phy reset pin to latch configuration correctly after SoC
+ * reset. GPIO0 Pin 10 (Ball AA20) is used for this on ICE
+ * board. Just do a low to high transition.
+ */
+ clrbits_le32(K2G_GPIO0_BANK0_BASE + K2G_GPIO_DIR_OFFSET,
+ BIT(10));
+ setbits_le32(K2G_GPIO0_BANK0_BASE + K2G_GPIO_CLRDATA_OFFSET,
+ BIT(10));
+ /* Delay just to get a transition to high */
+ udelay(100);
+ setbits_le32(K2G_GPIO0_BANK0_BASE + K2G_GPIO_SETDATA_OFFSET,
+ BIT(10));
}
return 0;
--
2.17.0
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