ARM: rmobile: Reset ethernet PHY

Toggle the PHY reset GPIO to bring the ethernet PHY out of reset properly.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
---
NOTE: This should be moved to the SH ethernet driver, but it's quite
      late in the cycle, so this is something to be done in 2018.05.

diff --git a/board/renesas/porter/porter.c b/board/renesas/porter/porter.c
index bd0080d..dfefd7f 100644 (file)
--- a/board/renesas/porter/porter.c
+++ b/board/renesas/porter/porter.c
@@ -65,11 +65,19 @@ int board_early_init_f(void)
        return 0;
 }
 
+#define ETHERNET_PHY_RESET     176     /* GPIO 5 22 */
+
 int board_init(void)
 {
        /* adress of boot parameters */
        gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
 
+       /* Force ethernet PHY out of reset */
+       gpio_request(ETHERNET_PHY_RESET, "phy_reset");
+       gpio_direction_output(ETHERNET_PHY_RESET, 0);
+       mdelay(10);
+       gpio_direction_output(ETHERNET_PHY_RESET, 1);
+
        return 0;
 }