From: "Marek Behún" To: Gregory CLEMENT Cc: "Marek Behún" , Rui Salvaterra , "Uwe Kleine-König" , linux-arm-kernel@lists.infradead.org, Andrew Lunn , stable@vger.kernel.org Subject: [PATCH mvebu-dt] ARM: dts: turris-omnia: configure LED[2]/INTn pin as interrupt pin Date: Sun, 21 Feb 2021 00:11:44 +0100 Message-Id: <20210220231144.32325-1-kabel@kernel.org> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reported-by: Rui Salvaterra Fixes: 26ca8b52d6e1 ("ARM: dts: add support for Turris Omnia") Cc: Uwe Kleine-König Cc: linux-arm-kernel@lists.infradead.org Cc: Andrew Lunn Cc: Gregory CLEMENT Cc: --- This patch fixes bug introduced with the commit that added Turris Omnia's DTS (26ca8b52d6e1), but will not apply cleanly because there is commit 8ee4a5f4f40d which changed node name and node compatible property and this commit did not go into stable. So either commit 8ee4a5f4f40d has also to go into stable before this, or this patch has to be fixed a little in order to apply to 4.14+. Please let me know how should I handle this. --- 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 @@ -254,6 +254,7 @@ 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 */ };