[PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10)

[PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10)

[Lukas Timmermann]

This patch series adds initial support for the google-manta board, known
as Google Nexus 10 to users. The device is powered by
the Exynos 5250 SoC. The bindings for the notification led are already 
in the linux-next tree and can be found here:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/leds/ams,as3668.yaml

The first two patches add the necessary device tree files and
bindings, while the last patch makes a small modification to
allow CPU1 to boot, as it requires a call to it's underlying firmware.

This first iteration only provides basic support to get the board
up and running and usable via UART and with WiFi support. We will upstream additional 
features in future patches. All patches have been tested on real hardware.

Changes in v4:
- Changed copyright years to 2026
- Rearranged includes
- Added comments to bmp180 voltage sources
- Refactored serial2 output
- Rearranged multiple properties of nodes. (@krzk)
- Rearranged nodes and subnodes. (@krzk) (@david)
- Fixed mismatch with firmware address.
- Fixed dtb check errors
- Added cpu1 power supply node.
- Renamed multiple subnodes.
- Removed i2c_0 for now as it isn't used.
- Fixed wifi interrupt.
- Added empty lines where applicable. (@krzk) (@david)
- Deactivated serial_1 for now.
- Link to v3: https://lore.kernel.org/r/20251215-lat3st-staging-v3-0-2e4914b64dd8@timmermann.space
Changes in v3:
 - Added a better patch description for firmware patch. (@krzk)
 - Reorganized nodes in DT. (@krzk)
 - Fixed memory node to use separate entries. (@krzk)
 - Renamed pwrseq node. (@krzk)
 - Fixed firmware checking for old dt compatible string. (@pavel)
 - Link to v2: https://lore.kernel.org/all/20251125-google-manta-v2-0-0f097cfff39c@timmermann.space/
Changes in v2:
 - Renamed to google-manta (@krzk)
 - Link to v1: https://lore.kernel.org/all/20251120144018.961604-2-linux@timmermann.space/

Signed-off-by: Lukas Timmermann <linux@timmermann.space>
---
Alexandre Marquet (3):
      dt-bindings: ARM: samsung: Add Google Manta (Nexus 10)
      ARM: dts: exynos: Add Google Manta (Nexus 10)
      ARM: samsung: exynos5250: Allow CPU1 to boot

 .../bindings/arm/samsung/samsung-boards.yaml       |   1 +
 arch/arm/boot/dts/samsung/Makefile                 |   1 +
 arch/arm/boot/dts/samsung/exynos5250-manta.dts     | 564 +++++++++++++++++++++
 arch/arm/mach-exynos/firmware.c                    |   4 +-
 4 files changed, 568 insertions(+), 2 deletions(-)
---
base-commit: d5f0e9098499869354aacb5b080f602f0399d396
change-id: 20251215-lat3st-staging-d9c926d8a75f

Best regards,
-- 
Lukas Timmermann <linux@timmermann.space>

[PATCH v4 1/3] dt-bindings: ARM: samsung: Add Google Manta (Nexus 10)

[Lukas Timmermann]

From: Alexandre Marquet <tb@a-marquet.fr>

Add the Google Nexus 10 board to documentation.

Signed-off-by: Alexandre Marquet <tb@a-marquet.fr>
Signed-off-by: Lukas Timmermann <linux@timmermann.space>
---
 Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml b/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
index f8e20e602c20..13d97257f070 100644
--- a/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
+++ b/Documentation/devicetree/bindings/arm/samsung/samsung-boards.yaml
@@ -117,6 +117,7 @@ properties:
       - description: Exynos5250 based boards
         items:
           - enum:
+              - google,manta                    # Google Manta (Nexus 10)
               - google,snow-rev5                # Google Snow Rev 5+
               - google,spring                   # Google Spring
               - insignal,arndale                # Insignal Arndale

-- 
2.52.0

[PATCH v4 2/3] ARM: dts: exynos: Add Google Manta (Nexus 10)

[Lukas Timmermann]

From: Alexandre Marquet <tb@a-marquet.fr>

Manta is the code name for Google Nexus 10, and was manufactured by
Samsung with their Exynos5250 SoC.
Add an initial device-tree file for this board.

Signed-off-by: Alexandre Marquet <tb@a-marquet.fr>
Co-developed-by: Lukas Timmermann <linux@timmermann.space>
Signed-off-by: Lukas Timmermann <linux@timmermann.space>
---
 arch/arm/boot/dts/samsung/Makefile             |   1 +
 arch/arm/boot/dts/samsung/exynos5250-manta.dts | 564 +++++++++++++++++++++++++
 2 files changed, 565 insertions(+)

diff --git a/arch/arm/boot/dts/samsung/Makefile b/arch/arm/boot/dts/samsung/Makefile
index 7becf36656b1..e0143ee8c82d 100644
--- a/arch/arm/boot/dts/samsung/Makefile
+++ b/arch/arm/boot/dts/samsung/Makefile
@@ -26,6 +26,7 @@ dtb-$(CONFIG_ARCH_EXYNOS4) += \
 	exynos4412-trats2.dtb
 dtb-$(CONFIG_ARCH_EXYNOS5) += \
 	exynos5250-arndale.dtb \
+	exynos5250-manta.dtb \
 	exynos5250-smdk5250.dtb \
 	exynos5250-snow.dtb \
 	exynos5250-snow-rev5.dtb \
diff --git a/arch/arm/boot/dts/samsung/exynos5250-manta.dts b/arch/arm/boot/dts/samsung/exynos5250-manta.dts
new file mode 100644
index 000000000000..24a27b342227
--- /dev/null
+++ b/arch/arm/boot/dts/samsung/exynos5250-manta.dts
@@ -0,0 +1,564 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Google Manta (Nexus 10) board device tree source
+ *
+ * Copyright (c) 2023-2026 Alexandre Marquet
+ * Copyright (c) 2025-2026 Lukas Timmermann
+ */
+
+/dts-v1/;
+#include "exynos5250.dtsi"
+#include "exynos-pinctrl.h"
+#include "exynos-mfc-reserved-memory.dtsi"
+
+#include <dt-bindings/clock/maxim,max77686.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/linux-event-codes.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	model = "Google Nexus 10";
+	compatible = "google,manta", "samsung,exynos5250", "samsung,exynos5";
+
+	aliases {
+		mmc0 = &mmc_0; /* eMMC */
+		mmc1 = &mmc_1; /* WiFi */
+	};
+
+	/* Voltage source unknown */
+	bmp180_vdda_reg: regulator-bmp180-vdda {
+		compatible = "regulator-fixed";
+		regulator-name = "BMP180_VDDA";
+	};
+
+	/* Voltage source unknown */
+	bmp180_vddd_reg: regulator-bmp180-vddd {
+		compatible = "regulator-fixed";
+		regulator-name = "BMP180_VDDD";
+	};
+
+	chosen {
+		stdout-path = "serial2:115200n8";
+	};
+
+	flash-controller {
+		compatible = "gpio-leds";
+
+		led-flash {
+			function = LED_FUNCTION_FLASH;
+			color = <LED_COLOR_ID_WHITE>;
+			linux,default-trigger = "flash";
+			gpios = <&gpe0 1 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+	};
+
+	fixed-rate-clocks {
+		xxti {
+			compatible = "samsung,clock-xxti";
+			clock-frequency = <24000000>;
+		};
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+
+		pinctrl-0 = <&gpio_keys>;
+		pinctrl-names = "default";
+
+		button-volume-down {
+			label = "Volume Down";
+			gpios = <&gpx2 1 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_VOLUMEDOWN>;
+			debounce-interval = <5>;
+		};
+
+		button-volume-up {
+			label = "Volume Up";
+			gpios = <&gpx2 0 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_VOLUMEUP>;
+			debounce-interval = <5>;
+		};
+
+		button-power {
+			label = "Power";
+			gpios = <&gpx2 7 GPIO_ACTIVE_LOW>;
+			linux,code = <KEY_POWER>;
+			debounce-interval = <5>;
+			wakeup-source;
+		};
+
+		lid-switch {
+			label = "Hall Effect Sensor";
+			gpios = <&gpx1 3 GPIO_ACTIVE_LOW>;
+			linux,input-type = <EV_SW>;
+			linux,code = <SW_LID>;
+			debounce-interval = <10>;
+			wakeup-source;
+		};
+	};
+
+	multi-led {
+		compatible = "leds-group-multicolor";
+		color = <LED_COLOR_ID_RGB>;
+		function = LED_FUNCTION_STATUS;
+		leds = <&status_red>, <&status_green>, <&status_blue>, <&status_white>;
+	};
+
+	pwrseq: mmc1-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+
+		reset-gpios = <&gpv1 0 GPIO_ACTIVE_LOW>;
+		pinctrl-0 = <&wlan_pmena>;
+		pinctrl-names = "default";
+
+		clocks = <&max77686 MAX77686_CLK_PMIC>;
+		clock-names = "ext_clock";
+
+		post-power-on-delay-ms = <300>;
+		power-off-delay-us = <50>;
+	};
+
+	firmware@204efff {
+		compatible = "samsung,secure-firmware";
+		reg = <0x0204efff 0x1000>;
+	};
+
+	memory@40000000 {
+		device_type = "memory";
+		reg = <0x40000000 0x20000000>,
+		      <0x60000000 0x20000000>,
+		      <0x80000000 0x20000000>,
+		      <0xa0000000 0x1ff00000>;
+	};
+};
+
+&clock {
+	assigned-clocks = <&clock CLK_FOUT_APLL>;
+	assigned-clock-rates = <1000000000>;
+};
+
+&cpu0 {
+	cpu-supply = <&buck2_reg>;
+};
+
+&cpu1 {
+	cpu-supply = <&buck2_reg>;
+};
+
+&ehci {
+	status = "disabled";
+};
+
+&i2c_1 {
+	status = "okay";
+
+	pressure-sensor@77 {
+		compatible = "bosch,bmp180";
+		reg = <0x77>;
+		vddd-supply = <&bmp180_vddd_reg>;
+		vdda-supply = <&bmp180_vdda_reg>;
+	};
+
+	accelerometer@68 {
+		compatible = "invensense,mpu6050";
+		reg = <0x68>;
+
+		pinctrl-0 = <&acc_int>;
+		pinctrl-names = "default";
+
+		interrupt-parent = <&gpx1>;
+		interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+
+		mount-matrix = "0", "-1",  "0",
+			      "-1",  "0",  "0",
+			       "0",  "0", "-1";
+
+		i2c-gate {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			magnetometer@c {
+				compatible = "asahi-kasei,ak8963";
+				reg = <0x0c>;
+
+				pinctrl-0 = <&msense_reset>;
+				pinctrl-names = "default";
+
+				mount-matrix = "-1", "0",  "0",
+					       "0",  "1",  "0",
+					       "0",  "0", "-1";
+			};
+		};
+	};
+
+	led-controller@42 {
+		compatible = "ams,as3668";
+		#address-cells = <1>;
+		#size-cells = <0>;
+		reg = <0x42>;
+
+		status_red: led@0 {
+			reg = <0>;
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_RED>;
+		};
+
+		status_green: led@1 {
+			reg = <1>;
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_GREEN>;
+		};
+
+		status_blue: led@2 {
+			reg = <2>;
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_BLUE>;
+		};
+
+		status_white: led@3 {
+			reg = <3>;
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_WHITE>;
+		};
+	};
+};
+
+&i2c_2 {
+	status = "okay";
+
+	light-sensor@23 {
+		compatible = "rohm,bh1721";
+		reg = <0x23>;
+
+		pinctrl-0 = <&bh1721fvc_reset>;
+		pinctrl-names = "default";
+
+		reset-gpios = <&gph1 2 GPIO_ACTIVE_LOW>;
+	};
+
+	onewire@18 {
+		compatible = "maxim,ds2484";
+		reg = <0x18>;
+
+		pinctrl-0 = <&onewire_sleep>;
+		pinctrl-names = "default";
+	};
+};
+
+&i2c_5 {
+	samsung,i2c-sda-delay = <100>;
+	status = "okay";
+
+	max77686: pmic@9 {
+		compatible = "maxim,max77686";
+		reg = <0x09>;
+
+		interrupt-parent = <&gpx0>;
+		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
+
+		pinctrl-0 = <&max77686_irq>;
+		pinctrl-names = "default";
+
+		#clock-cells = <1>;
+		wakeup-source;
+
+		voltage-regulators {
+			buck1_reg: BUCK1 {
+				regulator-name = "vdd_mif";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			buck2_reg: BUCK2 {
+				regulator-name = "vdd_arm";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			buck3_reg: BUCK3 {
+				regulator-name = "vdd_int";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			buck4_reg: BUCK4 {
+				regulator-name = "vdd_g3d";
+				regulator-min-microvolt = <850000>;
+				regulator-max-microvolt = <1200000>;
+				regulator-boot-on;
+			};
+
+			ldo3_reg: LDO3 {
+				regulator-name = "VCC_1.8V_AP";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo8_reg: LDO8 {
+				regulator-name = "VMIPI_1.0V";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo9_reg: LDO9 {
+				regulator-name = "TOUCH_VDD_1.8V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo10_reg: LDO10 {
+				regulator-name = "VMIPI_1.8V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo12_reg: LDO12 {
+				regulator-name = "VUOTG_3.0V";
+				regulator-min-microvolt = <3000000>;
+				regulator-max-microvolt = <3000000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo15_reg: LDO15 {
+				regulator-name = "VHSIC_1.0V";
+				regulator-min-microvolt = <1000000>;
+				regulator-max-microvolt = <1000000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo16_reg: LDO16 {
+				regulator-name = "VHSIC_1.8V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+
+			ldo17_reg: LDO17 {
+				regulator-name = "5M_CORE_1.5V";
+				regulator-min-microvolt = <1500000>;
+				regulator-max-microvolt = <1500000>;
+			};
+
+			ldo18_reg: LDO18 {
+				regulator-name = "CAM_IO_1.8V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo19_reg: LDO19 {
+				regulator-name = "VT_CAM_1.8V";
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+			};
+
+			ldo20_reg: LDO20 {
+				regulator-name = "TA_CHECK_1.35V";
+				regulator-min-microvolt = <1350000>;
+				regulator-max-microvolt = <1350000>;
+			};
+
+			ldo23_reg: LDO23 {
+				regulator-name = "TSP_AVDD_2.8V";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+			};
+
+			ldo24_reg: LDO24 {
+				regulator-name = "CAM_AF_2.8V";
+				regulator-min-microvolt = <2800000>;
+				regulator-max-microvolt = <2800000>;
+			};
+
+			ldo25_reg: LDO25 {
+				regulator-name = "VADC_3.3V";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+		};
+	};
+};
+
+&mixer {
+	status = "okay";
+};
+
+/* eMMC */
+&mmc_0 {
+	non-removable;
+	max-frequency = <200000000>;
+	sd-uhs-ddr50;
+	mmc-ddr-1_8v;
+	cap-mmc-hw-reset;
+	mmc-hs200-1_8v;
+	bus-width = <8>;
+	card-detect-delay = <200>;
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-sdr-timing = <1 2>;
+	samsung,dw-mshc-ddr-timing = <2 3>;
+
+	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_bus8>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+/* WiFi */
+&mmc_1 {
+	non-removable;
+	max-frequency = <100000000>;
+	sd-uhs-sdr50;
+	cap-sd-highspeed;
+	keep-power-in-suspend;
+	bus-width = <4>;
+	card-detect-delay = <0>;
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-sdr-timing = <2 4>;
+	samsung,dw-mshc-ddr-timing = <2 3>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&sd1_clk &sd1_cmd &sd1_bus4>;
+	mmc-pwrseq = <&pwrseq>;
+
+	status = "okay";
+
+	wifi@1 {
+		compatible = "brcm,bcm4330-fmac", "brcm,bcm4329-fmac";
+		reg = <1>;
+		interrupt-parent = <&gpx2>;
+		interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-names = "host-wake";
+		pinctrl-0 = <&wlan_irq>;
+		pinctrl-names = "default";
+	};
+};
+
+&ohci {
+	status = "disabled";
+};
+
+&pinctrl_0 {
+	acc_int: acc-int-pins {
+		samsung,pins = "gpx1-4";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_UP>;
+	};
+
+	max77686_irq: max77686-irq-pins {
+		samsung,pins = "gpx0-2";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_F>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
+	};
+
+	gpio_keys: gpio-keys-pins {
+		samsung,pins = "gpx2-0", "gpx2-1", "gpx2-7", "gpx1-3";
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
+	wlan_irq: wlan-irq-pins {
+		samsung,pins = "gpx2-5";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV3>;
+	};
+};
+
+&pinctrl_1 {
+	bh1721fvc_reset: bh1721fvc-reset-pins {
+		samsung,pins = "gph1-2";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+	};
+
+	msense_reset: msense-reset-pins {
+		samsung,pins = "gpg2-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+	};
+
+	onewire_sleep: onewire-sleep-pins {
+		samsung,pins = "gpg0-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
+		samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+	};
+};
+
+&pinctrl_2 {
+	wlan_pmena: wlan-pmena-pins {
+		samsung,pins = "gpv1-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS4_PIN_DRV_LV3>;
+		samsung,pin-con-pdn = <EXYNOS_PIN_PDN_PREV>;
+		samsung,pin-val = <0>;
+	};
+};
+
+&pmu_system_controller {
+	assigned-clocks = <&pmu_system_controller 0>;
+	assigned-clock-parents = <&clock CLK_FIN_PLL>;
+};
+
+&rtc {
+	clocks = <&clock CLK_RTC>, <&max77686 MAX77686_CLK_AP>;
+	clock-names = "rtc", "rtc_src";
+	status = "okay";
+};
+
+&sd1_bus4 {
+	samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
+	samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+};
+
+&sd1_cmd {
+	samsung,pin-con-pdn = <EXYNOS_PIN_PDN_INPUT>;
+	samsung,pin-pud-pdn = <EXYNOS_PIN_PULL_NONE>;
+};
+
+/* Bluetooth */
+&serial_0 {
+	status = "disabled";
+};
+
+/* GPS */
+&serial_1 {
+	status = "disabled";
+};
+
+&serial_2 {
+	pinctrl-0 = <&uart2_data>;
+	pinctrl-1 = <&uart2_data>, <&uart2_fctl>;
+	pinctrl-names = "default", "flow-control";
+	status = "okay";
+};
+
+&usbdrd {
+	status = "disabled";
+};
+
+&usbdrd_dwc3 {
+	status = "disabled";
+};
+
+&usbdrd_phy {
+	status = "disabled";
+};

-- 
2.52.0

[PATCH v4 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot

[Lukas Timmermann]

From: Alexandre Marquet <tb@a-marquet.fr>

The firmware trustzone needs a special call to bring up the secondary
cpu core on the Manta board. This seems to be not needed on other
exynos5 boards and comes down to the available firmware on
a particular board.

Signed-off-by: Alexandre Marquet <tb@a-marquet.fr>
Signed-off-by: Lukas Timmermann <linux@timmermann.space>
Reviewed-by: Henrik Grimler <henrik@grimler.se>
---
 arch/arm/mach-exynos/firmware.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index a5e22678e27b..e9b0ed07bb90 100644
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -61,10 +61,10 @@ static int exynos_cpu_boot(int cpu)
 	 * Exynos3250 doesn't need to send smc command for secondary CPU boot
 	 * because Exynos3250 removes WFE in secure mode.
 	 *
-	 * On Exynos5 devices the call is ignored by trustzone firmware.
+	 * On most Exynos5 devices the call is ignored by trustzone firmware.
 	 */
 	if (!soc_is_exynos4210() && !soc_is_exynos4212() &&
-	    !soc_is_exynos4412())
+	    !soc_is_exynos4412() && !of_machine_is_compatible("google,manta"))
 		return 0;
 
 	/*

-- 
2.52.0

Re: [PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10)

[Krzysztof Kozlowski]

On 27/01/2026 21:40, Lukas Timmermann wrote:
> This patch series adds initial support for the google-manta board, known
> as Google Nexus 10 to users. The device is powered by
> the Exynos 5250 SoC. The bindings for the notification led are already 
> in the linux-next tree and can be found here:
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/leds/ams,as3668.yaml
> 
> The first two patches add the necessary device tree files and
> bindings, while the last patch makes a small modification to
> allow CPU1 to boot, as it requires a call to it's underlying firmware.
> 
> This first iteration only provides basic support to get the board
> up and running and usable via UART and with WiFi support. We will upstream additional 
> features in future patches. All patches have been tested on real hardware.
> 


Thank you for the patch. My tree is currently closed for new features
till the end of the merge window. I will review and/or apply the patch
then. If I misjudged this patch and this is a fix, please let me know.



Best regards,
Krzysztof

Re: (subset) [PATCH v4 0/3] Add support for exynos5250-manta (Google Nexus 10)

[Krzysztof Kozlowski]

On Tue, 27 Jan 2026 21:40:55 +0100, Lukas Timmermann wrote:
> This patch series adds initial support for the google-manta board, known
> as Google Nexus 10 to users. The device is powered by
> the Exynos 5250 SoC. The bindings for the notification led are already
> in the linux-next tree and can be found here:
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/leds/ams,as3668.yaml
> 
> The first two patches add the necessary device tree files and
> bindings, while the last patch makes a small modification to
> allow CPU1 to boot, as it requires a call to it's underlying firmware.
> 
> [...]

Applied, thanks!

[1/3] dt-bindings: ARM: samsung: Add Google Manta (Nexus 10)
      https://git.kernel.org/krzk/linux/c/1e7e6c6301d529fac07554fbdb215c70c8510f7b
[2/3] ARM: dts: exynos: Add Google Manta (Nexus 10)
      https://git.kernel.org/krzk/linux/c/16319efc63cb41abd29337dc0dcfbef723ec1dea

Best regards,
-- 
Krzysztof Kozlowski <krzk@kernel.org>

Re: (subset) [PATCH v4 3/3] ARM: samsung: exynos5250: Allow CPU1 to boot

[Krzysztof Kozlowski]

On Tue, 27 Jan 2026 21:40:58 +0100, Lukas Timmermann wrote:
> The firmware trustzone needs a special call to bring up the secondary
> cpu core on the Manta board. This seems to be not needed on other
> exynos5 boards and comes down to the available firmware on
> a particular board.
> 
> 

Applied, thanks!

[3/3] ARM: samsung: exynos5250: Allow CPU1 to boot
      https://git.kernel.org/krzk/linux/c/32d4b991f25eeffac7568ef51367f924394fbdc5

Best regards,
-- 
Krzysztof Kozlowski <krzk@kernel.org>