From b8659752c37ec157ee254cff443b1c9d523aea22 Mon Sep 17 00:00:00 2001 From: Wenyou Yang Date: Thu, 11 Dec 2014 15:31:09 +0800 Subject: [PATCH] ARM: at91: board-dt-sama5: add phy_fixup to override NAND_Tree Appearance: On some SAMA5D4EK boards, after power up, the Eth1 doesn't work. Reason: The PIOE2 pin is connected to the NAND_Tree# of KSZ8081, But it outputs LOW during the reset period, which cause the NAND_Tree# enabled. Add phy_fixup() to disable NAND_Tree by overriding the Operation Mode Strap Override register(i.e. Register 16h) to clear the NAND_Tree bit. Signed-off-by: Wenyou Yang Signed-off-by: Nicolas Ferre --- arch/arm/mach-at91/board-dt-sama5.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/arm/mach-at91/board-dt-sama5.c b/arch/arm/mach-at91/board-dt-sama5.c index 8fb9ef5333f1..97f7367d32b8 100644 --- a/arch/arm/mach-at91/board-dt-sama5.c +++ b/arch/arm/mach-at91/board-dt-sama5.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -26,8 +27,25 @@ #include "generic.h" +static int ksz8081_phy_fixup(struct phy_device *phy) +{ + int value; + + value = phy_read(phy, 0x16); + value &= ~0x20; + phy_write(phy, 0x16, value); + + return 0; +} + static void __init sama5_dt_device_init(void) { + if (of_machine_is_compatible("atmel,sama5d4ek") && + IS_ENABLED(CONFIG_PHYLIB)) { + phy_register_fixup_for_id("fc028000.etherne:00", + ksz8081_phy_fixup); + } + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } -- 2.20.1