Le 11/12/2014 08:31, Wenyou Yang a écrit :
> 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 <[email protected]>
Stacked on top of at91-3.19-fixes.
Bye,
> ---
> 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 8fb9ef5..97f7367 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);
> }
>
>
--
Nicolas Ferre
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