Changes between Version 10 and Version 11 of SPI

Timestamp:

08/31/2018 12:59:42 AM (6 years ago)

Author:

Tim Harvey

Comment:

Noted half-duplex support only on Cavium CN80XX

SPI

@@ -19 +19 @@
 === Newport / Ventana ===
 Various Gateworks boards support 3.3V TTL SPI to an off-board expansion connector with a single CS#:
-||= Family =||= Board   =||= Device Tree Node =||= Connector =||
-|| Newport  || GW630x    || spi_7_0            || J8          ||
-||          || GW640x    || spi_7_0            || J8          ||
+||= Family =||= Board   =||= Device Tree Node =||= Connector =||= Notes =||
+|| Newport  || GW630x    || spi_7_0            || J8          || ^^^1^^^ ||
+||          || GW640x    || spi_7_0            || J8          || ^^^1^^^ ||
 || ||
-|| Ventana  || GW522x    || ecspi3             || J24         ||
-||          || GW54xx-E+ || ecspi2             || J32         ||
+|| Ventana  || GW522x    || ecspi3             || J24         || ||
+||          || GW54xx-E+ || ecspi2             || J32         || ||
+ 1. Note that the Cavium ThunderX SPI controller in the CN80XX on the Newport Product family only supports half-duplex SPI transfers. Drivers that use full-duplex transactions can be modified to support half-duplex (see [https://github.com/Gateworks/linux-newport/commit/cb270339619ccf2b50dfd3604a03626f85830453 'can:mcp251x: convert driver to half-duplex SPI'] as en example.
 
 Pinout (all signals are 3.3V TTL):