From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org>
Date: Sun, 21 Feb 2021 00:11:44 +0100
Subject: ARM: dts: turris-omnia: configure LED[2]/INTn pin as interrupt pin
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Git-commit: a26c56ae67fa9fbb45a8a232dcd7ebaa7af16086
Patch-mainline: v5.12-rc7
References: git-fixes
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>
Acked-by: Ivan T. Ivanov <iivanov@suse.de>
---
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
@@ -282,6 +282,7 @@
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 */
};