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6fe6b631ef
Backport [1] and fix [2] hardware buffer management. Also fix the IRQ storm caused by a misconfiguration of the PCA9538 interrupt pin [3]. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm/boot/dts/armada-385-turris-omnia.dts?id=018b88eee1a2efda26ed2f09aab33ccdc40ef18f [2] https://lore.kernel.org/linux-arm-kernel/20210217153038.1068170-1-rsalvaterra@gmail.com/ [3] https://lore.kernel.org/linux-arm-kernel/20210220231144.32325-1-kabel@kernel.org/ Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com>
65 lines
2.6 KiB
Diff
65 lines
2.6 KiB
Diff
From: "Marek Behún" <kabel@kernel.org>
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To: Gregory CLEMENT <gregory.clement@bootlin.com>
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Cc: "Marek Behún" <kabel@kernel.org>, Rui Salvaterra <rsalvaterra@gmail.com>, "Uwe Kleine-König" <uwe@kleine-koenig.org>, linux-arm-kernel@lists.infradead.org, Andrew Lunn <andrew@lunn.ch>, stable@vger.kernel.org
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Subject: [PATCH mvebu-dt] ARM: dts: turris-omnia: configure LED[2]/INTn pin as interrupt pin
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Date: Sun, 21 Feb 2021 00:11:44 +0100
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Message-Id: <20210220231144.32325-1-kabel@kernel.org>
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X-Mailer: git-send-email 2.26.2
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Use the `marvell,reg-init` DT property to configure the LED[2]/INTn pin
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of the Marvell 88E1514 ethernet PHY on Turris Omnia into interrupt mode.
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Without this the pin is by default in LED[2] mode, and the Marvell PHY
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driver configures LED[2] into "On - Link, Blink - Activity" mode.
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This fixes the issue where the pca9538 GPIO/interrupt controller (which
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can't mask interrupts in HW) received too many interrupts and after a
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time started ignoring the interrupt with error message:
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IRQ 71: nobody cared
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There is a work in progress to have the Marvell PHY driver support
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parsing PHY LED nodes from OF and registering the LEDs as Linux LED
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class devices. Once this is done the PHY driver can also automatically
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set the pin into INTn mode if it does not find LED[2] in OF.
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Until then, though, we fix this via `marvell,reg-init` DT property.
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Signed-off-by: Marek Behún <kabel@kernel.org>
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Reported-by: Rui Salvaterra <rsalvaterra@gmail.com>
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Fixes: 26ca8b52d6e1 ("ARM: dts: add support for Turris Omnia")
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Cc: Uwe Kleine-König <uwe@kleine-koenig.org>
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Cc: linux-arm-kernel@lists.infradead.org
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Cc: Andrew Lunn <andrew@lunn.ch>
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Cc: Gregory CLEMENT <gregory.clement@bootlin.com>
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Cc: <stable@vger.kernel.org>
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---
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This patch fixes bug introduced with the commit that added Turris
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Omnia's DTS (26ca8b52d6e1), but will not apply cleanly because there is
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commit 8ee4a5f4f40d which changed node name and node compatible
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property and this commit did not go into stable.
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So either commit 8ee4a5f4f40d has also to go into stable before this, or
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this patch has to be fixed a little in order to apply to 4.14+.
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Please let me know how should I handle this.
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---
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arch/arm/boot/dts/armada-385-turris-omnia.dts | 1 +
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1 file changed, 1 insertion(+)
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--- a/arch/arm/boot/dts/armada-385-turris-omnia.dts
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+++ b/arch/arm/boot/dts/armada-385-turris-omnia.dts
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@@ -254,6 +254,7 @@
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status = "okay";
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compatible = "ethernet-phy-id0141.0DD1", "ethernet-phy-ieee802.3-c22";
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reg = <1>;
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+ marvell,reg-init = <3 18 0 0x4985>;
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/* irq is connected to &pcawan pin 7 */
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};
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