[PATCH v3 0/9] arm64: dts: amlogic: Add MMC/SD/SDIO support for Khadas VIM4 (Amlogic T7)

[PATCH v3 0/9] arm64: dts: amlogic: Add MMC/SD/SDIO support for Khadas VIM4 (Amlogic T7)

[Ronald Claveau]

This patch series depends on Jian's SCMI clock patches yet to merge
https://lore.kernel.org/all/20260313070022.700437-1-jian.hu@amlogic.com/

This series adds device tree support for the MMC, SD card and SDIO
interfaces on the Amlogic T7 SoC and the Khadas VIM4 board.

The first patches add the necessary building blocks in the T7 SoC
DTSI: pinctrl nodes for pin muxing, PWM controller nodes, and MMC
controller nodes. The amlogic,t7-mmc and amlogic,t7-pwm compatible
strings are introduced with fallbacks to existing drivers, avoiding
the need for new driver code.

The remaining patches enable these interfaces on the Khadas VIM4
board, including the power regulators, the SDIO power sequence and
32.768kHz PWM clock required by the BCM43752 Wi-Fi module, and the
board-specific MMC controller configurations.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
Changes in v3:
- Remove all changes about fixed pll clock from analog controller.
- Use clocks retrieved through SCMI.
- Add other MMC controllers
- Manage Wi-Fi module enablement. 
- Link to v2: https://lore.kernel.org/r/20260218101709.35450-1-linux-kernel-dev@aliel.fr

Changes in v2:
- Resend v1 patches as attached to the first patch.
- Link to v1: https://lore.kernel.org/r/20260218101709.35450-1-linux-kernel-dev@aliel.fr

---
Ronald Claveau (9):
      arm64: dts: amlogic: t7: Add eMMC, SD card and SDIO pinctrl nodes
      dt-bindings: mmc: amlogic: Add compatible for T7 mmc
      arm64: dts: amlogic: t7: Add MMC controller nodes
      arm64: dts: amlogic: t7: Add PWM pinctrl nodes
      arm64: dts: amlogic: t7: Add PWM controller nodes
      arm64: dts: amlogic: t7: khadas-vim4: Add power regulators
      arm64: dts: amlogic: t7: khadas-vim4: Add SDIO power sequence and WiFi clock
      dt-bindings: net: wireless: brcm: Add compatible for bcm43752
      arm64: dts: amlogic: t7: khadas-vim4: Add MMC nodes

 .../bindings/mmc/amlogic,meson-gx-mmc.yaml         |   5 +-
 .../bindings/net/wireless/brcm,bcm4329-fmac.yaml   |   1 +
 .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts  | 202 ++++++++++++-
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi        | 336 +++++++++++++++++++++
 4 files changed, 542 insertions(+), 2 deletions(-)
---
base-commit: f6eb9ae8b9fc13c3971e4a6d1e8442f253001f36
change-id: 20260320-add-emmc-t7-vim4-6ad16e94614f
prerequisite-message-id: <20260313070022.700437-1-jian.hu@amlogic.com>
prerequisite-patch-id: f03a086b4137158412b2d47b3de793b858de8dde
prerequisite-patch-id: 123970c9b29c2090440f2fd71c85d3c6fd8e36de
prerequisite-patch-id: 3e2e56b0926ba327b520f935df4ced5089bbe503

Best regards,
-- 
Ronald Claveau <linux-kernel-dev@aliel.fr>

[PATCH v3 1/9] arm64: dts: amlogic: t7: Add eMMC, SD card and SDIO pinctrl nodes

[Ronald Claveau]

These pinctrl nodes are required by the eMMC, SD card and SDIO drivers
to configure pin muxing at runtime.

- eMMC: control, 4-bit/8-bit data, data strobe and clock gate pins
- SD card: data, clock, command and clock gate pins
- SDIO: data, clock, command and clock gate pins

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 98 +++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
index 6510068bcff92..ac8de8e9b8010 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
@@ -250,6 +250,104 @@ gpio: bank@4000 {
 					#gpio-cells = <2>;
 					gpio-ranges = <&periphs_pinctrl 0 0 157>;
 				};
+
+				emmc_ctrl_pins: emmc-ctrl {
+					mux-0 {
+						groups = "emmc_cmd";
+						function = "emmc";
+						bias-pull-up;
+					};
+
+					mux-1 {
+						groups = "emmc_clk";
+						function = "emmc";
+						bias-disable;
+					};
+				};
+
+				emmc_data_4b_pins: emmc-data-4b {
+					mux-0 {
+						groups = "emmc_nand_d0",
+							 "emmc_nand_d1",
+							 "emmc_nand_d2",
+							 "emmc_nand_d3";
+						function = "emmc";
+						bias-pull-up;
+					};
+				};
+
+				emmc_data_8b_pins: emmc-data-8b {
+					mux-0 {
+						groups = "emmc_nand_d0",
+							 "emmc_nand_d1",
+							 "emmc_nand_d2",
+							 "emmc_nand_d3",
+							 "emmc_nand_d4",
+							 "emmc_nand_d5",
+							 "emmc_nand_d6",
+							 "emmc_nand_d7";
+						function = "emmc";
+						bias-pull-up;
+					};
+				};
+
+				emmc_ds_pins: emmc-ds {
+					mux {
+						groups = "emmc_nand_ds";
+						function = "emmc";
+						bias-pull-down;
+					};
+				};
+
+				emmc_clk_gate_pins: emmc_clk_gate {
+					mux {
+						groups = "GPIOB_8";
+						function = "gpio_periphs";
+						bias-pull-down;
+					};
+				};
+
+				sdcard_pins: sdcard {
+					mux {
+						groups = "sdcard_d0",
+							 "sdcard_d1",
+							 "sdcard_d2",
+							 "sdcard_d3",
+							 "sdcard_clk",
+							 "sdcard_cmd";
+						function = "sdcard";
+						bias-pull-up;
+					};
+				};
+
+				sdcard_clk_gate_pins: sdcard_clk_gate {
+					mux {
+						groups = "GPIOC_4";
+						function = "gpio_periphs";
+						bias-pull-down;
+					};
+				};
+
+				sdio_pins: sdio {
+					mux-0 {
+						groups = "sdio_d0",
+							 "sdio_d1",
+							 "sdio_d2",
+							 "sdio_d3",
+							 "sdio_clk",
+							 "sdio_cmd";
+						function = "sdio";
+						bias-pull-up;
+					};
+				};
+
+				sdio_clk_gate_pins: sdio_clk_gate {
+					mux {
+						groups = "GPIOX_4";
+						function = "gpio_periphs";
+						bias-pull-up;
+					};
+				};
 			};
 
 			gpio_intc: interrupt-controller@4080 {

-- 
2.49.0

[PATCH v3 2/9] dt-bindings: mmc: amlogic: Add compatible for T7 mmc

[Ronald Claveau]

Add amlogic,t7-mmc compatible string, falling back to amlogic,meson-axg-mmc
as the T7 MMC controller is compatible with the AXG implementation.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
index 57646575a13f8..40dccf9715781 100644
--- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
+++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
@@ -19,7 +19,10 @@ allOf:
 properties:
   compatible:
     oneOf:
-      - const: amlogic,meson-axg-mmc
+      - items:
+          - enum:
+              - amlogic,t7-mmc
+          - const: amlogic,meson-axg-mmc
       - items:
           - const: amlogic,meson-gx-mmc
           - const: amlogic,meson-gxbb-mmc

-- 
2.49.0

[PATCH v3 3/9] arm64: dts: amlogic: t7: Add MMC controller nodes

[Ronald Claveau]

Add device tree nodes for the three MMC controllers available
on the Amlogic T7 SoC, using amlogic,meson-axg-mmc as fallback compatible.
All nodes are disabled by default and should be
enabled in the board-specific DTS file.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 39 +++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
index ac8de8e9b8010..b3898669c9571 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
@@ -374,6 +374,45 @@ sec_ao: ao-secure@10220 {
 				reg = <0x0 0x10220 0x0 0x140>;
 				amlogic,has-chip-id;
 			};
+
+			sd_emmc_a: mmc@88000 {
+				compatible = "amlogic,t7-mmc", "amlogic,meson-axg-mmc";
+				reg = <0x0 0x88000 0x0 0x800>;
+				interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+				status = "disabled";
+				clocks = <&clkc_periphs CLKID_SYS_SD_EMMC_A>,
+					 <&clkc_periphs CLKID_SD_EMMC_A>,
+					 <&scmi_clk CLKID_FCLK_DIV2>;
+				clock-names = "core", "clkin0", "clkin1";
+				assigned-clocks = <&clkc_periphs CLKID_SD_EMMC_A_SEL>;
+				assigned-clock-parents = <&xtal>;
+			};
+
+			sd_emmc_b: mmc@8a000 {
+				compatible = "amlogic,t7-mmc", "amlogic,meson-axg-mmc";
+				reg = <0x0 0x8a000 0x0 0x800>;
+				interrupts = <GIC_SPI 177 IRQ_TYPE_EDGE_RISING>;
+				status = "disabled";
+				clocks = <&clkc_periphs CLKID_SYS_SD_EMMC_B>,
+					 <&clkc_periphs CLKID_SD_EMMC_B>,
+					 <&scmi_clk CLKID_FCLK_DIV2>;
+				clock-names = "core", "clkin0", "clkin1";
+				assigned-clocks = <&clkc_periphs CLKID_SD_EMMC_B_SEL>;
+				assigned-clock-parents = <&xtal>;
+			};
+
+			sd_emmc_c: mmc@8c000 {
+				compatible = "amlogic,t7-mmc", "amlogic,meson-axg-mmc";
+				reg = <0x0 0x8c000 0x0 0x800>;
+				interrupts = <GIC_SPI 178 IRQ_TYPE_EDGE_RISING>;
+				status = "disabled";
+				clocks = <&clkc_periphs CLKID_SYS_SD_EMMC_C>,
+					 <&clkc_periphs CLKID_SD_EMMC_C>,
+					 <&scmi_clk CLKID_FCLK_DIV2>;
+				clock-names = "core", "clkin0", "clkin1";
+				assigned-clocks = <&clkc_periphs CLKID_SD_EMMC_C_SEL>;
+				assigned-clock-parents = <&xtal>;
+			};
 		};
 
 	};

-- 
2.49.0

[PATCH v3 4/9] arm64: dts: amlogic: t7: Add PWM pinctrl nodes

[Ronald Claveau]

These pinctrl nodes are required by the PWM drivers to configure
pin muxing at runtime.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 136 ++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
index b3898669c9571..6d41de6f895b4 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
@@ -307,6 +307,142 @@ mux {
 					};
 				};
 
+				pwm_a_pins: pwm-a {
+					mux {
+						groups = "pwm_a";
+						function = "pwm_a";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_a_pins: pwm-ao-a {
+					mux {
+						groups = "pwm_ao_a";
+						function = "pwm_ao_a";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_b_pins: pwm-ao-b {
+					mux {
+						groups = "pwm_ao_b";
+						function = "pwm_ao_b";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_c_pins: pwm-ao-c {
+					mux {
+						groups = "pwm_ao_c";
+						function = "pwm_ao_c";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_c_hiz_pins: pwm-ao-c-hiz {
+					mux {
+						groups = "pwm_ao_c_hiz";
+						function = "pwm_ao_c_hiz";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_d_pins: pwm-ao-d {
+					mux {
+						groups = "pwm_ao_d";
+						function = "pwm_ao_d";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_e_pins: pwm-ao-e {
+					mux {
+						groups = "pwm_ao_e";
+						function = "pwm_ao_e";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_f_pins: pwm-ao-f {
+					mux {
+						groups = "pwm_ao_f";
+						function = "pwm_ao_f";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_g_pins: pwm-ao-g {
+					mux {
+						groups = "pwm_ao_g";
+						function = "pwm_ao_g";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_g_hiz_pins: pwm-ao-g-hiz {
+					mux {
+						groups = "pwm_ao_g_hiz";
+						function = "pwm_ao_g_hiz";
+						bias-disable;
+					};
+				};
+
+				pwm_ao_h_pins: pwm-ao-h {
+					mux {
+						groups = "pwm_ao_h";
+						function = "pwm_ao_h";
+						bias-disable;
+					};
+				};
+
+				pwm_b_pins: pwm-b {
+					mux {
+						groups = "pwm_b";
+						function = "pwm_b";
+						bias-disable;
+					};
+				};
+
+				pwm_c_pins: pwm-c {
+					mux {
+						groups = "pwm_c";
+						function = "pwm_c";
+						bias-disable;
+					};
+				};
+
+				pwm_d_pins: pwm-d {
+					mux {
+						groups = "pwm_d";
+						function = "pwm_d";
+						bias-disable;
+					};
+				};
+
+				pwm_e_pins: pwm-e {
+					mux {
+						groups = "pwm_e";
+						function = "pwm_e";
+						bias-disable;
+					};
+				};
+
+				pwm_f_pins: pwm-f {
+					mux {
+						groups = "pwm_f";
+						function = "pwm_f";
+						bias-disable;
+					};
+				};
+
+				pwm_vs_pins: pwm-vs {
+					mux {
+						groups = "pwm_vs";
+						function = "pwm_vs";
+						bias-disable;
+					};
+				};
+
 				sdcard_pins: sdcard {
 					mux {
 						groups = "sdcard_d0",

-- 
2.49.0

[PATCH v3 5/9] arm64: dts: amlogic: t7: Add PWM controller nodes

[Ronald Claveau]

Add device tree nodes for the seven PWM controllers available
on the Amlogic T7 SoC, using amlogic,meson-s4-pwm as fallback compatible.
All nodes are disabled by default and should be
enabled in the board-specific DTS file.

Co-developed-by: Nick Xie <nick@khadas.com>
Signed-off-by: Nick Xie <nick@khadas.com>
Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 63 +++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
index 6d41de6f895b4..a0261cd8eadfc 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
@@ -511,6 +511,69 @@ sec_ao: ao-secure@10220 {
 				amlogic,has-chip-id;
 			};
 
+			pwm_ao_ef: pwm@30000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x30000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_AO_E>,
+					 <&clkc_periphs CLKID_PWM_AO_F>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_ao_gh: pwm@32000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x32000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_AO_G>,
+					 <&clkc_periphs CLKID_PWM_AO_H>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_ab: pwm@58000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x58000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_A>,
+					 <&clkc_periphs CLKID_PWM_B>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_cd: pwm@5a000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x5a000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_C>,
+					 <&clkc_periphs CLKID_PWM_D>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_ef: pwm@5c000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x5c000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_E>,
+					 <&clkc_periphs CLKID_PWM_F>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_ao_ab: pwm@5e000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x5e000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_AO_A>,
+					 <&clkc_periphs CLKID_PWM_AO_B>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
+			pwm_ao_cd: pwm@60000 {
+				compatible = "amlogic,t7-pwm", "amlogic,meson-s4-pwm";
+				reg = <0x0 0x60000 0x0 0x24>;
+				clocks = <&clkc_periphs CLKID_PWM_AO_C>,
+					 <&clkc_periphs CLKID_PWM_AO_D>;
+				#pwm-cells = <3>;
+				status = "disabled";
+			};
+
 			sd_emmc_a: mmc@88000 {
 				compatible = "amlogic,t7-mmc", "amlogic,meson-axg-mmc";
 				reg = <0x0 0x88000 0x0 0x800>;

-- 
2.49.0

[PATCH v3 6/9] arm64: dts: amlogic: t7: khadas-vim4: Add power regulators

[Ronald Claveau]

Add voltage regulator nodes describing the VIM4 power tree,
required by peripheral nodes such as the SD card controller.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts  | 90 ++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index fffdab96b12eb..2450084d37642 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -6,6 +6,8 @@
 /dts-v1/;
 
 #include "amlogic-t7.dtsi"
+#include <dt-bindings/gpio/amlogic,t7-periphs-pinctrl.h>
+#include <dt-bindings/gpio/gpio.h>
 
 / {
 	model = "Khadas vim4";
@@ -45,6 +47,94 @@ xtal: xtal-clk {
 		#clock-cells = <0>;
 	};
 
+	dc_in: regulator-dc-in {
+		compatible = "regulator-fixed";
+		regulator-name = "DC_IN";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
+	sd_3v3: regulator-sdcard-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "SD_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vddao_3v3>;
+		gpio = <&gpio GPIOD_11 GPIO_ACTIVE_LOW>;
+		regulator-boot-on;
+		enable-active-low;
+		regulator-always-on;
+	};
+
+	vcc5v: regulator-vcc-5v {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC5V";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&dc_in>;
+
+		gpio = <&gpio GPIOH_4 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	vcc5v0_usb: regulator-vcc-usb {
+		compatible = "regulator-fixed";
+		regulator-name = "VCC5V0_USB";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&vcc5v>;
+
+		gpio = <&gpio GPIOY_5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	vddao_1v8: regulator-vddao-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDAO_1V8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vddao_3v3>;
+		regulator-always-on;
+	};
+
+	vddao_3v3: regulator-vddao-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDAO_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&dc_in>;
+		regulator-always-on;
+	};
+
+	vddio_1v8: regulator-vddio-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_1V8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vddio_3v3>;
+		regulator-always-on;
+	};
+
+	vddio_3v3: regulator-vddio-3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "VDDIO_3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vddao_3v3>;
+		regulator-always-on;
+	};
+
+	vddio_c: regulator-gpio-c {
+		compatible = "regulator-gpio";
+		regulator-name = "VDDIO_C";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vddio_3v3>;
+		gpios = <&gpio GPIOD_9 GPIO_ACTIVE_HIGH>;
+		states = <1800000 1
+			  3300000 0>;
+	};
 };
 
 &uart_a {

-- 
2.49.0

[PATCH v3 7/9] arm64: dts: amlogic: t7: khadas-vim4: Add SDIO power sequence and WiFi clock

[Ronald Claveau]

Add the SDIO power sequence node using mmc-pwrseq-simple and a
32.768kHz PWM-based clock required by the Wi-Fi module.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts  | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index 2450084d37642..770f06b0b16c7 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -67,6 +67,15 @@ sd_3v3: regulator-sdcard-3v3 {
 		regulator-always-on;
 	};
 
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio GPIOX_6 GPIO_ACTIVE_LOW>;
+		post-power-on-delay-ms = <500>;
+		power-off-delay-us = <200000>;
+		clocks = <&wifi32k>;
+		clock-names = "ext_clock";
+	};
+
 	vcc5v: regulator-vcc-5v {
 		compatible = "regulator-fixed";
 		regulator-name = "VCC5V";
@@ -135,6 +144,19 @@ vddio_c: regulator-gpio-c {
 		states = <1800000 1
 			  3300000 0>;
 	};
+
+	wifi32k: wifi32k {
+		compatible = "pwm-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+			pwms = <&pwm_ab 0 30518 0>;
+	};
+};
+
+&pwm_ab {
+	status = "okay";
+	pinctrl-0 = <&pwm_a_pins>;
+	pinctrl-names = "default";
 };
 
 &uart_a {

-- 
2.49.0

[PATCH v3 8/9] dt-bindings: net: wireless: brcm: Add compatible for bcm43752

[Ronald Claveau]

Add bcm43752 compatible with its bcm4329 compatible fallback.

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
index 3be7576787644..81fd3e37452a6 100644
--- a/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
+++ b/Documentation/devicetree/bindings/net/wireless/brcm,bcm4329-fmac.yaml
@@ -42,6 +42,7 @@ properties:
               - brcm,bcm4356-fmac
               - brcm,bcm4359-fmac
               - brcm,bcm4366-fmac
+              - brcm,bcm43752-fmac
               - cypress,cyw4373-fmac
               - cypress,cyw43012-fmac
               - infineon,cyw43439-fmac

-- 
2.49.0

[PATCH v3 9/9] arm64: dts: amlogic: t7: khadas-vim4: Add MMC nodes

[Ronald Claveau]

Enable and configure the three MMC controllers for the Khadas VIM4 board:
- sd_emmc_a: SDIO interface for the BCM43752 Wi-Fi module
- sd_emmc_b: SD card slot
- sd_emmc_c: eMMC storage

Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
---
 .../dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts  | 90 +++++++++++++++++++++-
 1 file changed, 89 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
index 770f06b0b16c7..5a73ae081036c 100644
--- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
+++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts
@@ -14,7 +14,10 @@ / {
 	compatible = "khadas,vim4", "amlogic,a311d2", "amlogic,t7";
 
 	aliases {
-		serial0 = &uart_a;
+		serial0	= &uart_a;
+		mmc0	= &sd_emmc_c;
+		mmc1	= &sd_emmc_b;
+		mmc2	= &sd_emmc_a;
 	};
 
 	memory@0 {
@@ -159,6 +162,91 @@ &pwm_ab {
 	pinctrl-names = "default";
 };
 
+/* SDIO */
+&sd_emmc_a {
+	status = "okay";
+	pinctrl-0 = <&sdio_pins>;
+	pinctrl-1 = <&sdio_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	bus-width = <4>;
+	cap-sd-highspeed;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	cap-sdio-irq;
+	max-frequency = <200000000>;
+	non-removable;
+	disable-wp;
+	no-mmc;
+	no-sd;
+
+	power-domains = <&pwrc PWRC_T7_SDIO_A_ID>;
+
+	keep-power-in-suspend;
+
+	mmc-pwrseq = <&sdio_pwrseq>;
+
+	vmmc-supply = <&vddao_3v3>;
+	vqmmc-supply = <&vddao_1v8>;
+
+	brcmf: wifi@1 {
+		reg = <1>;
+		compatible = "brcm,bcm43752-fmac", "brcm,bcm4329-fmac";
+	};
+};
+
+/* SD card */
+&sd_emmc_b {
+	status = "okay";
+	pinctrl-0 = <&sdcard_pins>;
+	pinctrl-1 = <&sdcard_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+
+	bus-width = <4>;
+	cap-sd-highspeed;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	max-frequency = <200000000>;
+	disable-wp;
+	no-sdio;
+	no-mmc;
+
+	power-domains = <&pwrc PWRC_T7_SDIO_B_ID>;
+
+	cd-gpios = <&gpio GPIOC_6 GPIO_ACTIVE_LOW>;
+	vmmc-supply = <&sd_3v3>;
+	vqmmc-supply = <&vddio_c>;
+};
+
+/* eMMC */
+&sd_emmc_c {
+	status = "okay";
+	pinctrl-0 = <&emmc_ctrl_pins>, <&emmc_data_8b_pins>, <&emmc_ds_pins>;
+	pinctrl-1 = <&emmc_clk_gate_pins>;
+	pinctrl-names = "default", "clk-gate";
+
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	mmc-ddr-1_8v;
+	mmc-hs200-1_8v;
+	max-frequency = <200000000>;
+	disable-wp;
+	non-removable;
+	no-sdio;
+	no-sd;
+
+	power-domains = <&pwrc PWRC_T7_EMMC_ID>;
+
+	vmmc-supply = <&vddio_3v3>;
+	vqmmc-supply = <&vddio_1v8>;
+};
+
 &uart_a {
 	status = "okay";
 	clocks = <&xtal>, <&xtal>, <&xtal>;

-- 
2.49.0

Re: [PATCH v3 8/9] dt-bindings: net: wireless: brcm: Add compatible for bcm43752

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 250 bytes --]

On Mon, Mar 23, 2026 at 10:55:33AM +0100, Ronald Claveau wrote:
> Add bcm43752 compatible with its bcm4329 compatible fallback.
> 
> Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>

Acked-by: Conor Dooley <conor.dooley@microchip.com>

[-- Attachment #2: signature.asc --]
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Re: [PATCH v3 2/9] dt-bindings: mmc: amlogic: Add compatible for T7 mmc

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 75 bytes --]

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

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Re: [PATCH v3 2/9] dt-bindings: mmc: amlogic: Add compatible for T7 mmc

[Ulf Hansson]

On Mon, 23 Mar 2026 at 10:58, Ronald Claveau <linux-kernel-dev@aliel.fr> wrote:
>
> Add amlogic,t7-mmc compatible string, falling back to amlogic,meson-axg-mmc
> as the T7 MMC controller is compatible with the AXG implementation.
>
> Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>

Applied for next, thanks!

Kind regards
Uffe


> ---
>  Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> index 57646575a13f8..40dccf9715781 100644
> --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> @@ -19,7 +19,10 @@ allOf:
>  properties:
>    compatible:
>      oneOf:
> -      - const: amlogic,meson-axg-mmc
> +      - items:
> +          - enum:
> +              - amlogic,t7-mmc
> +          - const: amlogic,meson-axg-mmc
>        - items:
>            - const: amlogic,meson-gx-mmc
>            - const: amlogic,meson-gxbb-mmc
>
> --
> 2.49.0
>

Re: [PATCH v3 2/9] dt-bindings: mmc: amlogic: Add compatible for T7 mmc

[Xianwei Zhao]

Hi Ronald,

On 2026/3/23 17:55, Ronald Claveau wrote:
> Add amlogic,t7-mmc compatible string, falling back to amlogic,meson-axg-mmc
> as the T7 MMC controller is compatible with the AXG implementation.
> 
> Signed-off-by: Ronald Claveau<linux-kernel-dev@aliel.fr>
> ---
>   Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml | 5
> ++++-
>   1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git
> a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> index 57646575a13f8..40dccf9715781 100644
> --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
> @@ -19,7 +19,10 @@ allOf:
>   properties:
>     compatible:
>       oneOf:
> -      - const: amlogic,meson-axg-mmc
> +      - items:
> +          - enum:
> +              - amlogic,t7-mmc
> +          - const: amlogic,meson-axg-mmc

It seems that break API here.
One item should be added here instead of being replaced.

>         - items:
>             - const: amlogic,meson-gx-mmc
>             - const: amlogic,meson-gxbb-mmc
> 
> --
> 2.49.0

Re: [PATCH v3 1/9] arm64: dts: amlogic: t7: Add eMMC, SD card and SDIO pinctrl nodes

[Xianwei Zhao]

Hi Ronald,

On 2026/3/23 17:55, Ronald Claveau wrote:
> These pinctrl nodes are required by the eMMC, SD card and SDIO drivers
> to configure pin muxing at runtime.
> 
> - eMMC: control, 4-bit/8-bit data, data strobe and clock gate pins
> - SD card: data, clock, command and clock gate pins
> - SDIO: data, clock, command and clock gate pins
> 
> Signed-off-by: Ronald Claveau<linux-kernel-dev@aliel.fr>
> ---
>   arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 98 +++++++++++++++++++++++++++++
>   1 file changed, 98 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
> index 6510068bcff92..ac8de8e9b8010 100644
> --- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
> @@ -250,6 +250,104 @@ gpio: bank@4000 {
>                                          #gpio-cells = <2>;
>                                          gpio-ranges = <&periphs_pinctrl 0 0 157>;
>                                  };
> +
> +                               emmc_ctrl_pins: emmc-ctrl {
> +                                       mux-0 {
> +                                               groups = "emmc_cmd";
> +                                               function = "emmc";
> +                                               bias-pull-up;
> +                                       };
> +
> +                                       mux-1 {
> +                                               groups = "emmc_clk";
> +                                               function = "emmc";
> +                                               bias-disable;
> +                                       };
> +                               };
> +
> +                               emmc_data_4b_pins: emmc-data-4b {
> +                                       mux-0 {
> +                                               groups = "emmc_nand_d0",
> +                                                        "emmc_nand_d1",
> +                                                        "emmc_nand_d2",
> +                                                        "emmc_nand_d3";
> +                                               function = "emmc";
> +                                               bias-pull-up;
> +                                       };
> +                               };
> +
> +                               emmc_data_8b_pins: emmc-data-8b {
> +                                       mux-0 {
> +                                               groups = "emmc_nand_d0",
> +                                                        "emmc_nand_d1",
> +                                                        "emmc_nand_d2",
> +                                                        "emmc_nand_d3",
> +                                                        "emmc_nand_d4",
> +                                                        "emmc_nand_d5",
> +                                                        "emmc_nand_d6",
> +                                                        "emmc_nand_d7";
> +                                               function = "emmc";
> +                                               bias-pull-up;
> +                                       };
> +                               };
> +
> +                               emmc_ds_pins: emmc-ds {
> +                                       mux {
> +                                               groups = "emmc_nand_ds";
> +                                               function = "emmc";
> +                                               bias-pull-down;
> +                                       };
> +                               };
> +
> +                               emmc_clk_gate_pins: emmc_clk_gate {

Node names should use hyphens ('-') instead of underscores ('_'), 
consistent with the following nodes.

> +                                       mux {
> +                                               groups = "GPIOB_8";
> +                                               function = "gpio_periphs";
> +                                               bias-pull-down;
> +                                       };
> +                               };
> +
> +                               sdcard_pins: sdcard {
> +                                       mux {
> +                                               groups = "sdcard_d0",
> +                                                        "sdcard_d1",
> +                                                        "sdcard_d2",
> +                                                        "sdcard_d3",
> +                                                        "sdcard_clk",
> +                                                        "sdcard_cmd";
> +                                               function = "sdcard";
> +                                               bias-pull-up;
> +                                       };
> +                               };
> +
> +                               sdcard_clk_gate_pins: sdcard_clk_gate {
> +                                       mux {
> +                                               groups = "GPIOC_4";
> +                                               function = "gpio_periphs";
> +                                               bias-pull-down;
> +                                       };
> +                               };
> +
> +                               sdio_pins: sdio {
> +                                       mux-0 {
> +                                               groups = "sdio_d0",
> +                                                        "sdio_d1",
> +                                                        "sdio_d2",
> +                                                        "sdio_d3",
> +                                                        "sdio_clk",
> +                                                        "sdio_cmd";
> +                                               function = "sdio";
> +                                               bias-pull-up;
> +                                       };
> +                               };
> +
> +                               sdio_clk_gate_pins: sdio_clk_gate {
> +                                       mux {
> +                                               groups = "GPIOX_4";
> +                                               function = "gpio_periphs";
> +                                               bias-pull-up;
> +                                       };
> +                               };
>                          };
> 
>                          gpio_intc: interrupt-controller@4080 {

Re: [PATCH v3 1/9] arm64: dts: amlogic: t7: Add eMMC, SD card and SDIO pinctrl nodes

[Ronald Claveau]

On 3/25/26 3:48 AM, Xianwei Zhao wrote:
> Hi Ronald,
> 
> On 2026/3/23 17:55, Ronald Claveau wrote:
>> These pinctrl nodes are required by the eMMC, SD card and SDIO drivers
>> to configure pin muxing at runtime.
>>
>> - eMMC: control, 4-bit/8-bit data, data strobe and clock gate pins
>> - SD card: data, clock, command and clock gate pins
>> - SDIO: data, clock, command and clock gate pins
>>
>> Signed-off-by: Ronald Claveau<linux-kernel-dev@aliel.fr>
>> ---
>>   arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi | 98 +++++++++++++++++++
>> ++++++++++
>>   1 file changed, 98 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi b/arch/arm64/
>> boot/dts/amlogic/amlogic-t7.dtsi
>> index 6510068bcff92..ac8de8e9b8010 100644
>> --- a/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
>> +++ b/arch/arm64/boot/dts/amlogic/amlogic-t7.dtsi
>> @@ -250,6 +250,104 @@ gpio: bank@4000 {
>>                                          #gpio-cells = <2>;
>>                                          gpio-ranges =
>> <&periphs_pinctrl 0 0 157>;
>>                                  };
>> +
>> +                               emmc_ctrl_pins: emmc-ctrl {
>> +                                       mux-0 {
>> +                                               groups = "emmc_cmd";
>> +                                               function = "emmc";
>> +                                               bias-pull-up;
>> +                                       };
>> +
>> +                                       mux-1 {
>> +                                               groups = "emmc_clk";
>> +                                               function = "emmc";
>> +                                               bias-disable;
>> +                                       };
>> +                               };
>> +
>> +                               emmc_data_4b_pins: emmc-data-4b {
>> +                                       mux-0 {
>> +                                               groups = "emmc_nand_d0",
>> +                                                        "emmc_nand_d1",
>> +                                                        "emmc_nand_d2",
>> +                                                        "emmc_nand_d3";
>> +                                               function = "emmc";
>> +                                               bias-pull-up;
>> +                                       };
>> +                               };
>> +
>> +                               emmc_data_8b_pins: emmc-data-8b {
>> +                                       mux-0 {
>> +                                               groups = "emmc_nand_d0",
>> +                                                        "emmc_nand_d1",
>> +                                                        "emmc_nand_d2",
>> +                                                        "emmc_nand_d3",
>> +                                                        "emmc_nand_d4",
>> +                                                        "emmc_nand_d5",
>> +                                                        "emmc_nand_d6",
>> +                                                        "emmc_nand_d7";
>> +                                               function = "emmc";
>> +                                               bias-pull-up;
>> +                                       };
>> +                               };
>> +
>> +                               emmc_ds_pins: emmc-ds {
>> +                                       mux {
>> +                                               groups = "emmc_nand_ds";
>> +                                               function = "emmc";
>> +                                               bias-pull-down;
>> +                                       };
>> +                               };
>> +
>> +                               emmc_clk_gate_pins: emmc_clk_gate {
> 
> Node names should use hyphens ('-') instead of underscores ('_'),
> consistent with the following nodes.
> 

Thanks for your feedback Xianwei.
I will change that.

>> +                                       mux {
>> +                                               groups = "GPIOB_8";
>> +                                               function =
>> "gpio_periphs";
>> +                                               bias-pull-down;
>> +                                       };
>> +                               };
>> +
>> +                               sdcard_pins: sdcard {
>> +                                       mux {
>> +                                               groups = "sdcard_d0",
>> +                                                        "sdcard_d1",
>> +                                                        "sdcard_d2",
>> +                                                        "sdcard_d3",
>> +                                                        "sdcard_clk",
>> +                                                        "sdcard_cmd";
>> +                                               function = "sdcard";
>> +                                               bias-pull-up;
>> +                                       };
>> +                               };
>> +
>> +                               sdcard_clk_gate_pins: sdcard_clk_gate {
>> +                                       mux {
>> +                                               groups = "GPIOC_4";
>> +                                               function =
>> "gpio_periphs";
>> +                                               bias-pull-down;
>> +                                       };
>> +                               };
>> +
>> +                               sdio_pins: sdio {
>> +                                       mux-0 {
>> +                                               groups = "sdio_d0",
>> +                                                        "sdio_d1",
>> +                                                        "sdio_d2",
>> +                                                        "sdio_d3",
>> +                                                        "sdio_clk",
>> +                                                        "sdio_cmd";
>> +                                               function = "sdio";
>> +                                               bias-pull-up;
>> +                                       };
>> +                               };
>> +
>> +                               sdio_clk_gate_pins: sdio_clk_gate {
>> +                                       mux {
>> +                                               groups = "GPIOX_4";
>> +                                               function =
>> "gpio_periphs";
>> +                                               bias-pull-up;
>> +                                       };
>> +                               };
>>                          };
>>
>>                          gpio_intc: interrupt-controller@4080 {


-- 
Best regards,
Ronald

Re: [PATCH v3 2/9] dt-bindings: mmc: amlogic: Add compatible for T7 mmc

[Ronald Claveau]

On 3/25/26 3:38 AM, Xianwei Zhao wrote:
> Hi Ronald,
> 
> On 2026/3/23 17:55, Ronald Claveau wrote:
>> Add amlogic,t7-mmc compatible string, falling back to amlogic,meson-
>> axg-mmc
>> as the T7 MMC controller is compatible with the AXG implementation.
>>
>> Signed-off-by: Ronald Claveau<linux-kernel-dev@aliel.fr>
>> ---
>>   Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml | 5
>> ++++-
>>   1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git
>> a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
>> b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
>> index 57646575a13f8..40dccf9715781 100644
>> --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
>> +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml
>> @@ -19,7 +19,10 @@ allOf:
>>   properties:
>>     compatible:
>>       oneOf:
>> -      - const: amlogic,meson-axg-mmc
>> +      - items:
>> +          - enum:
>> +              - amlogic,t7-mmc
>> +          - const: amlogic,meson-axg-mmc
> 
> It seems that break API here.
> One item should be added here instead of being replaced.
> 

Thanks Xianwei, ok I will change that in a new version.

>>         - items:
>>             - const: amlogic,meson-gx-mmc
>>             - const: amlogic,meson-gxbb-mmc
>>
>> -- 
>> 2.49.0


-- 
Best regards,
Ronald