From: Marek Behún kabel@kernel.org
commit a26c56ae67fa9fbb45a8a232dcd7ebaa7af16086 upstream.
Use the `marvell,reg-init` DT property to configure the LED[2]/INTn pin of the Marvell 88E1514 ethernet PHY on Turris Omnia into interrupt mode.
Without this the pin is by default in LED[2] mode, and the Marvell PHY driver configures LED[2] into "On - Link, Blink - Activity" mode.
This fixes the issue where the pca9538 GPIO/interrupt controller (which can't mask interrupts in HW) received too many interrupts and after a time started ignoring the interrupt with error message: IRQ 71: nobody cared
There is a work in progress to have the Marvell PHY driver support parsing PHY LED nodes from OF and registering the LEDs as Linux LED class devices. Once this is done the PHY driver can also automatically set the pin into INTn mode if it does not find LED[2] in OF.
Until then, though, we fix this via `marvell,reg-init` DT property.
Signed-off-by: Marek Behún kabel@kernel.org Reported-by: Rui Salvaterra rsalvaterra@gmail.com Fixes: 26ca8b52d6e1 ("ARM: dts: add support for Turris Omnia") Cc: Uwe Kleine-König uwe@kleine-koenig.org Cc: linux-arm-kernel@lists.infradead.org Cc: Andrew Lunn andrew@lunn.ch Cc: Gregory CLEMENT gregory.clement@bootlin.com Cc: stable@vger.kernel.org Tested-by: Rui Salvaterra rsalvaterra@gmail.com Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Gregory CLEMENT gregory.clement@bootlin.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/boot/dts/armada-385-turris-omnia.dts | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm/boot/dts/armada-385-turris-omnia.dts +++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts @@ -236,6 +236,7 @@ status = "okay"; compatible = "ethernet-phy-id0141.0DD1", "ethernet-phy-ieee802.3-c22"; reg = <1>; + marvell,reg-init = <3 18 0 0x4985>;
/* irq is connected to &pcawan pin 7 */ };