f164d0204b
If the hi3110 shares the SPI bus with another traffic-intensive device and packets are received in high volume (by a separate machine sending with "cangen -g 0 -i -x"), reception stops after a few minutes and the counter in /proc/interrupts stops incrementing. Bus state is "active". Bringing the interface down and back up reconvenes the reception. The issue is not observed when the hi3110 is the sole device on the SPI bus. Using a level-triggered interrupt makes the issue go away and lets the hi3110 successfully receive 2 GByte over the course of 5 days while a ks8851 Ethernet chip on the same SPI bus handles 6 GByte of traffic. Unfortunately the hi3110 datasheet is mum on the trigger type. The pin description on page 3 only specifies the polarity (active high): http://www.holtic.com/documents/371-hi-3110_v-rev-kpdf.do Cc: Mathias Duckeck <m.duckeck@kunbus.de> Cc: Akshay Bhat <akshay.bhat@timesys.com> Cc: Casey Fitzpatrick <casey.fitzpatrick@timesys.com> Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
24 lines
663 B
Plaintext
24 lines
663 B
Plaintext
* Holt HI-311X stand-alone CAN controller device tree bindings
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Required properties:
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- compatible: Should be one of the following:
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- "holt,hi3110" for HI-3110
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- reg: SPI chip select.
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- clocks: The clock feeding the CAN controller.
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- interrupts: Should contain IRQ line for the CAN controller.
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Optional properties:
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- vdd-supply: Regulator that powers the CAN controller.
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- xceiver-supply: Regulator that powers the CAN transceiver.
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Example:
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can0: can@1 {
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compatible = "holt,hi3110";
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reg = <1>;
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clocks = <&clk32m>;
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interrupt-parent = <&gpio4>;
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interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
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vdd-supply = <®5v0>;
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xceiver-supply = <®5v0>;
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};
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