From 29bc24ec4f9f159b3fdaf9c85cce89504a54782a Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Mon, 23 Nov 2015 16:18:02 -0200
Subject: [PATCH] mx6sxsabresd: Fix Ethernet PHY reset sequence
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Since commit 59370f3fcd1350 ("net: phy: delay only if reset handler is
registered") Ethernet is no longer functional.
This commit does not have an issue in itself, but it revelead a problem
with the Ethernet initialization.
Fix this by calling enable_fec_anatop_clock() earlier and also
by adding a 10ms reset delay as recommended in the AR8031 datasheet.
Suggested-by: Jörg Krause <joerg.krause@embedded.rocks>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
---
board/freescale/mx6sxsabresd/mx6sxsabresd.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index 3ee46629ee3..56dc0208c7d 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -150,11 +150,15 @@ static int setup_fec(void)
{
struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
- int reg;
+ int reg, ret;
/* Use 125MHz anatop loopback REF_CLK1 for ENET1 */
clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC1_MASK, 0);
+ ret = enable_fec_anatop_clock(0, ENET_125MHZ);
+ if (ret)
+ return ret;
+
imx_iomux_v3_setup_multiple_pads(phy_control_pads,
ARRAY_SIZE(phy_control_pads));
@@ -163,14 +167,14 @@ static int setup_fec(void)
/* Reset AR8031 PHY */
gpio_direction_output(IMX_GPIO_NR(2, 7) , 0);
- udelay(500);
+ mdelay(10);
gpio_set_value(IMX_GPIO_NR(2, 7), 1);
reg = readl(&anatop->pll_enet);
reg |= BM_ANADIG_PLL_ENET_REF_25M_ENABLE;
writel(reg, &anatop->pll_enet);
- return enable_fec_anatop_clock(0, ENET_125MHZ);
+ return 0;
}
int board_eth_init(bd_t *bis)
--
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