From b0cdc5ae46d79b2d9155a3ef7ea1c63afcdfa804 Mon Sep 17 00:00:00 2001 From: Rui Salvaterra Date: Mon, 22 Feb 2021 17:37:13 +0000 Subject: mvebu: fix the Turris Omnia device tree Enable and fix hardware buffer management. Also fix the IRQ storm caused by a misconfiguration of the PCA9538 interrupt pin. Reviewed-by: Tomasz Maciej Nowak Tested-by: Tomasz Maciej Nowak Signed-off-by: Rui Salvaterra --- ...onfigure-LED-2--INTn-pin-as-interrupt-pin.patch | 64 ++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 target/linux/mvebu/patches-5.10/101-ARM-dts-turris-omnia-configure-LED-2--INTn-pin-as-interrupt-pin.patch (limited to 'target/linux/mvebu/patches-5.10/101-ARM-dts-turris-omnia-configure-LED-2--INTn-pin-as-interrupt-pin.patch') diff --git a/target/linux/mvebu/patches-5.10/101-ARM-dts-turris-omnia-configure-LED-2--INTn-pin-as-interrupt-pin.patch b/target/linux/mvebu/patches-5.10/101-ARM-dts-turris-omnia-configure-LED-2--INTn-pin-as-interrupt-pin.patch new file mode 100644 index 0000000000..c7509950e0 --- /dev/null +++ b/target/linux/mvebu/patches-5.10/101-ARM-dts-turris-omnia-configure-LED-2--INTn-pin-as-interrupt-pin.patch @@ -0,0 +1,64 @@ +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 +@@ -390,6 +390,7 @@ + phy1: ethernet-phy@1 { + compatible = "ethernet-phy-ieee802.3-c22"; + reg = <1>; ++ marvell,reg-init = <3 18 0 0x4985>; + + /* irq is connected to &pcawan pin 7 */ + }; -- cgit v1.2.3