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| author | Wenyou Yang <wenyou.yang@atmel.com> | 2014-12-11 10:31:09 +0300 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-01-12 17:50:23 +0300 |
| commit | b8659752c37ec157ee254cff443b1c9d523aea22 (patch) | |
| tree | 10e08184637cd8299cd99fae3c386810bd22459d /arch/arm/mach-at91/board-dt-sama5.c | |
| parent | 55eb9c343fdd3611ae3de6ab8a8512f303d3f581 (diff) | |
| download | linux-b8659752c37ec157ee254cff443b1c9d523aea22.tar.xz | |
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 <wenyou.yang@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/mach-at91/board-dt-sama5.c')
| -rw-r--r-- | arch/arm/mach-at91/board-dt-sama5.c | 18 |
1 files changed, 18 insertions, 0 deletions
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 <linux/of_platform.h> #include <linux/phy.h> #include <linux/clk-provider.h> +#include <linux/phy.h> #include <asm/setup.h> #include <asm/irq.h> @@ -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); } |