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dt-bindings: spi: Document bcm2711 and bcm7211 SPI compatible 

The BCM2711 and BCM7211 chips use the BCM2835 SPI controller, but there
are severl instances of those in the system and they all share the same
interrupt line. Document specific compatible strings such that the
driver can take appropriate actions.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200604034655.15930-2-f.fainelli@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Florian Fainelli 2020-06-03 20:46:53 -07:00 committed by Rob Herring
parent c217cf8136
commit a11bc0e17a
1 changed files with 2 additions and 1 deletions
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3
Documentation/devicetree/bindings/spi/brcm,bcm2835-spi.txt
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@ -5,7 +5,8 @@ SPI0, and the other known as the "Universal SPI Master"; part of the
auxiliary block. This binding applies to the SPI0 controller.
Required properties:
- compatible: Should be "brcm,bcm2835-spi".
- compatible: Should be one of "brcm,bcm2835-spi" for BCM2835/2836/2837 or
"brcm,bcm2711-spi" for BCM2711 or "brcm,bcm7211-spi" for BCM7211.
- reg: Should contain register location and length.
- interrupts: Should contain interrupt.
- clocks: The clock feeding the SPI controller.