Add an overlay to change from the default OSPI NOR to QSPI NOR
for all am6xx-phycore-som boards.
The EEPROM on am6xx-phycore-soms contains information about the
configuration of the SOM. The standard configuration of the SOM
has an ospi nor, but if qspi nor is populated, the EEPROM will
indicate that change and we can use this overlay to cleanly change to
qspi nor.

Signed-off-by: Nathan Morrisson <nmorrisson@phytec.com>
---
 arch/arm64/boot/dts/ti/Makefile                   |  5 +++++
 .../boot/dts/ti/k3-am6xx-phycore-qspi-nor.dtso    | 15 +++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 arch/arm64/boot/dts/ti/k3-am6xx-phycore-qspi-nor.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 8d8fc8bfaf7e..f0ddda064f08 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -58,6 +58,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am6xx-phycore-disable-eth-phy.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am6xx-phycore-disable-rtc.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am6xx-phycore-disable-spi-nor.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am6xx-phycore-qspi-nor.dtbo
 
 # Boards with AM65x SoC
 k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb \
@@ -120,6 +121,8 @@ k3-am625-phyboard-lyra-disable-spi-nor-dtbs := k3-am625-phyboard-lyra-rdk.dtb \
 	k3-am6xx-phycore-disable-spi-nor.dtbo
 k3-am625-phyboard-lyra-gpio-fan-dtbs := k3-am625-phyboard-lyra-rdk.dtb \
 	k3-am62x-phyboard-lyra-gpio-fan.dtbo
+k3-am625-phyboard-lyra-qspi-nor-dtbs := k3-am625-phyboard-lyra-rdk.dtb \
+	k3-am6xx-phycore-qspi-nor.dtbo
 k3-am625-sk-csi2-imx219-dtbs := k3-am625-sk.dtb \
 	k3-am62x-sk-csi2-imx219.dtbo
 k3-am625-sk-csi2-ov5640-dtbs := k3-am625-sk.dtb \
@@ -149,6 +152,8 @@ k3-am642-phyboard-electra-disable-rtc-dtbs := \
 	k3-am642-phyboard-electra-rdk.dtb k3-am6xx-phycore-disable-rtc.dtbo
 k3-am642-phyboard-electra-disable-spi-nor-dtbs := \
 	k3-am642-phyboard-electra-rdk.dtb k3-am6xx-phycore-disable-spi-nor.dtbo
+k3-am642-phyboard-electra-qspi-nor-dtbs := \
+	k3-am642-phyboard-electra-rdk.dtb k3-am6xx-phycore-qspi-nor.dtbo
 k3-am642-phyboard-electra-gpio-fan-dtbs := \
 	k3-am642-phyboard-electra-rdk.dtb k3-am642-phyboard-electra-gpio-fan.dtbo
 k3-am642-tqma64xxl-mbax4xxl-sdcard-dtbs := \
diff --git a/arch/arm64/boot/dts/ti/k3-am6xx-phycore-qspi-nor.dtso b/arch/arm64/boot/dts/ti/k3-am6xx-phycore-qspi-nor.dtso
new file mode 100644
index 000000000000..969dfebcd637
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am6xx-phycore-qspi-nor.dtso
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/*
+ * Copyright (C) 2024 PHYTEC America LLC
+ * Author: Nathan Morrisson <nmorrisson@phytec.com>
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include "k3-pinctrl.h"
+
+&serial_flash {
+	spi-tx-bus-width = <1>;
+	spi-rx-bus-width = <4>;
+};
-- 
2.25.1

Hi Nathan Morrisson,

On Fri, 21 Jun 2024 16:31:43 -0700, Nathan Morrisson wrote:
> Add an overlay to change from the default OSPI NOR to QSPI NOR
> for all am6xx-phycore-som boards.
> The EEPROM on am6xx-phycore-soms contains information about the
> configuration of the SOM. The standard configuration of the SOM
> has an ospi nor, but if qspi nor is populated, the EEPROM will
> indicate that change and we can use this overlay to cleanly change to
> qspi nor.
> 
> [...]

I have applied the following to branch ti-k3-dts-next on [1].
Thank you!

[1/1] arm64: dts: ti: k3-am6xx-phycore-qspi-nor: Add overlay to enable QSPI NOR
      commit: 45a792b5131a02cfa9771b8e1ad9df797b01263a

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent up the chain during
the next merge window (or sooner if it is a relevant bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/ti/linux.git
--
Vignesh