Messages in this thread | | | Date | Mon, 12 Jan 2015 15:52:26 +0100 | From | Nicolas Ferre <> | Subject | Re: [PATCH] ARM: at91: board-dt-sama5: add phy_fixup to override NAND_Tree which improperly strapp-in during the reset period. |
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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 <wenyou.yang@atmel.com>
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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