[U-Boot] [PATCH 6/8] imx: mx7dsabresd: reset ENET_RST_B

[Peng Fan]

Reset ENET_RST_B to make ENET function stable.
Since DM_GPIO enabled, we use "gpio_spi at 0_5" which corresponds
to ENET_RST_B.

Signed-off-by: Peng Fan <peng.fan at nxp.com>
Cc: Stefano Babic <sbabic at denx.de>
---
 board/freescale/mx7dsabresd/mx7dsabresd.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/board/freescale/mx7dsabresd/mx7dsabresd.c b/board/freescale/mx7dsabresd/mx7dsabresd.c
index d6ba364..2c5eb25 100644
--- a/board/freescale/mx7dsabresd/mx7dsabresd.c
+++ b/board/freescale/mx7dsabresd/mx7dsabresd.c
@@ -232,6 +232,23 @@ int mmc_map_to_kernel_blk(int dev_no)
 int board_eth_init(bd_t *bis)
 {
 	int ret;
+	unsigned int gpio;
+
+	ret = gpio_lookup_name("gpio_spi at 0_5", NULL, NULL, &gpio);
+	if (ret) {
+		printf("GPIO: 'gpio_spi at 0_5' not found\n");
+		return -ENODEV;
+	}
+
+	ret = gpio_request(gpio, "fec_rst");
+	if (ret && ret != -EBUSY) {
+		printf("gpio: requesting pin %u failed\n", gpio);
+		return ret;
+	}
+
+	gpio_direction_output(gpio, 0);
+	udelay(500);
+	gpio_direction_output(gpio, 1);
 
 	setup_iomux_fec();
 
-- 
2.6.2