[PATCH v1 0/2] arm64: dts: ti: k3-am69-aquila: fix SPI hardware CS issue

[PATCH v1 0/2] arm64: dts: ti: k3-am69-aquila: fix SPI hardware CS issue

[Vitor Soares]

From: Vitor Soares <vitor.soares@toradex.com>

Hardware chip select does not work correctly on main_spi0 and main_spi2
controllers on the Aquila AM69 module. Testing revealed main_spi2 loses
CS state during runtime PM suspend, while main_spi0 cannot drive CS HIGH
when bus is idle. This series switches both controllers to use GPIO-based
chip select instead.

Vitor Soares (2):
  arm64: dts: ti: k3-am69-aquila: change main_spi0/2 CS to GPIO mode
  arm64: dts: ti: k3-am69-aquila-clover: change main_spi2 CS0 to GPIO
    mode

 arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts | 3 ++-
 arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi       | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

-- 
2.52.0

[PATCH v1 1/2] arm64: dts: ti: k3-am69-aquila: change main_spi0/2 CS to GPIO mode

[Vitor Soares]

From: Vitor Soares <vitor.soares@toradex.com>

Hardware chip select does not work correctly on main_spi0 and
main_spi2 controllers. Testing shows main_spi2 loses CS state
during runtime PM suspend, while main_spi0 cannot drive CS HIGH
when bus is idle.

Use GPIO-based chip select for both controllers.

Fixes: 39ac6623b1d8 ("arm64: dts: ti: Add Aquila AM69 Support")
Cc: stable@vger.kernel.org
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
---
 arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi b/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi
index 0866eb8a6f34..5119baf62a4c 100644
--- a/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am69-aquila.dtsi
@@ -479,7 +479,7 @@ J784S4_IOPAD(0x0dc, PIN_OUTPUT, 0) /* (AM36) SPI0_D1  */ /* AQUILA D17 */
 	/* Aquila SPI_2 CS */
 	pinctrl_main_spi0_cs0: main-spi0-cs0-default-pins {
 		pinctrl-single,pins = <
-			J784S4_IOPAD(0x0cc, PIN_OUTPUT, 0) /* (AM37) SPI0_CS0 */ /* AQUILA D16 */
+			J784S4_IOPAD(0x0cc, PIN_OUTPUT, 7) /* (AM37) SPI0_CS0.GPIO0_51 */ /* AQUILA D16 */
 		>;
 	};
 
@@ -495,7 +495,7 @@ J784S4_IOPAD(0x0ac, PIN_OUTPUT, 10) /* (AE34) MCASP0_AXR15.SPI2_D1  */ /* AQUILA
 	/* Aquila SPI_1 CS */
 	pinctrl_main_spi2_cs0: main-spi2-cs0-default-pins {
 		pinctrl-single,pins = <
-			J784S4_IOPAD(0x09c, PIN_OUTPUT, 10) /* (AF35) MCASP0_AXR11.SPI2_CS1 */ /* AQUILA D9 */
+			J784S4_IOPAD(0x09c, PIN_OUTPUT, 7) /* (AF35) MCASP0_AXR11.GPIO0_39 */ /* AQUILA D9 */
 		>;
 	};
 
@@ -1204,6 +1204,7 @@ &main_sdhci1 {
 &main_spi0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_main_spi0>, <&pinctrl_main_spi0_cs0>;
+	cs-gpios = <&main_gpio0 51 GPIO_ACTIVE_LOW>;
 	status = "disabled";
 };
 
@@ -1211,6 +1212,7 @@ &main_spi0 {
 &main_spi2 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_main_spi2>, <&pinctrl_main_spi2_cs0>;
+	cs-gpios = <&main_gpio0 39 GPIO_ACTIVE_LOW>;
 	status = "disabled";
 };
 
-- 
2.52.0

[PATCH v1 2/2] arm64: dts: ti: k3-am69-aquila-clover: change main_spi2 CS0 to GPIO mode

[Vitor Soares]

From: Vitor Soares <vitor.soares@toradex.com>

Change CS0 from hardware chip select to GPIO-based chip select to
align with the base aquila device tree configuration.

Fixes: 9f748a6177e1 ("arm64: dts: ti: am69-aquila: Add Clover")
Cc: stable@vger.kernel.org
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
---
 arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts b/arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts
index 55fd214a82e4..927d0877d7f8 100644
--- a/arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-aquila-clover.dts
@@ -208,7 +208,8 @@ &main_spi2 {
 	pinctrl-0 = <&pinctrl_main_spi2>,
 		    <&pinctrl_main_spi2_cs0>,
 		    <&pinctrl_gpio_05>;
-	cs-gpios = <0>, <&wkup_gpio0 29 GPIO_ACTIVE_LOW>;
+	cs-gpios = <&main_gpio0 39 GPIO_ACTIVE_LOW>,
+		   <&wkup_gpio0 29 GPIO_ACTIVE_LOW>;
 	status = "okay";
 
 	tpm@1 {
-- 
2.52.0

Re: [PATCH v1 0/2] arm64: dts: ti: k3-am69-aquila: fix SPI hardware CS issue

[Francesco Dolcini]

On Mon, Jan 12, 2026 at 05:53:45PM +0000, Vitor Soares wrote:
> From: Vitor Soares <vitor.soares@toradex.com>
> 
> Hardware chip select does not work correctly on main_spi0 and main_spi2
> controllers on the Aquila AM69 module. Testing revealed main_spi2 loses
> CS state during runtime PM suspend, while main_spi0 cannot drive CS HIGH
> when bus is idle. This series switches both controllers to use GPIO-based
> chip select instead.

Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>

Re: [PATCH v1 0/2] arm64: dts: ti: k3-am69-aquila: fix SPI hardware CS issue

[Nishanth Menon]

Hi Vitor Soares,

On Mon, 12 Jan 2026 17:53:45 +0000, Vitor Soares wrote:
> From: Vitor Soares <vitor.soares@toradex.com>
> 
> Hardware chip select does not work correctly on main_spi0 and main_spi2
> controllers on the Aquila AM69 module. Testing revealed main_spi2 loses
> CS state during runtime PM suspend, while main_spi0 cannot drive CS HIGH
> when bus is idle. This series switches both controllers to use GPIO-based
> chip select instead.
> 
> [...]

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

[1/2] arm64: dts: ti: k3-am69-aquila: change main_spi0/2 CS to GPIO mode
      commit: 78a123f45a7e9ac2a59f0eff8a37d31773e7a021
[2/2] arm64: dts: ti: k3-am69-aquila-clover: change main_spi2 CS0 to GPIO mode
      commit: 319fff9c7d620af83d8ab67050a54f63f16ae4e8

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
-- 
Regards,
Nishanth Menon
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