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Subject[PATCH] arm: dts: am33xx: Add spi alias to match SOC schematics
From: Suniel Mahesh <>

Linux bus numbers should match the numbers defined by the chip
manufacturer. This patch add's spi aliases to acheive that bus
naming convention.

Signed-off-by: Suniel Mahesh <>
Signed-off-by: Karthik Tummala <>
Tested-by: Karthik Tummala <>
- Patch was compile tested and built(ARCH=arm) on next-20170822.
- Patch was hardware tested on AM335x (McSPI controller) with
spi flash chips.
- No build/run-time issues reported.
- At present bus numbers are represented as spi1 and spi2 in sysfs
instead of spi0 and spi1, as defined in SOC schematics.
- The commit:
"spi: Pick spi bus number from Linux idr or spi alias"
has introduced bus numbering which happens dynamically either
via Linux IDR or spi alias for master drivers.
- The commit:
"spi: omap: Allocate bus number from spi framework"
is now using spi framework to allocate bus numbers.
arch/arm/boot/dts/am33xx.dtsi | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 7d7ca05..e58fab8 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -36,6 +36,8 @@
phy1 = &usb1_phy;
ethernet0 = &cpsw_emac0;
ethernet1 = &cpsw_emac1;
+ spi0 = &spi0;
+ spi1 = &spi1;

cpus {
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