ARM: dts: sun8i-a33: Support for Sinlinx SinA33 dev board

Hi Maxime,

This series enables support for the Sinlinx SinA33 dev board. This is a core/daughter board SDK kit from Chinese vendor Sinlinx. The core board itself does not have any special connectivity, so I didn't split them into 2 files.

The series is based on Vishnu/Hans' A33 series (v2). As the last (dts) patch was not merged yet, there might be a conflict in dts/Makefile.

Patch 1 adds a pinmux setting for uart0 on PB pins. This is new on A33, and is much better than using R_UART for console on A23, as we can also see messages from BROM/boot0 when developing, and also use the same earlyprintk settings as other sunxi platforms.

Patch 2 adds a pinmux setting for 8 bit eMMC on mmc2. mmc2 also has a reset pin, though I'm not sure if our mmc driver actually uses it. Not using it seems to work anyway.

Patch 3 adds the dts file for the SinA33 dev board. Just the basic set of features are enabled: UART console, MMC, LRADC.

Chen-Yu Tsai (3):
ARM: dts: sun8i: Add pinmux setting for 8bit mmc2
ARM: dts: sun8i-a33: Add pinmux setting for uart0 on PB pins
ARM: dts: sun8i-a33: Add dts for Sinlinx SinA33 development board.

 arch/arm/boot/dts/Makefile                         |   3 +-
 arch/arm/boot/dts/sun8i-a23-a33.dtsi               |  10 ++
 ...sun8i-a33.dtsi => sun8i-a33-sinlinx-sina33.dts} | 106 ++++++++++++++-------
 arch/arm/boot/dts/sun8i-a33.dtsi                   |   8 ++
 4 files changed, 93 insertions(+), 34 deletions(-)
 copy arch/arm/boot/dts/{sun8i-a33.dtsi => sun8i-a33-sinlinx-sina33.dts} (56%)

2.1.4

mmc2 is mostly used with eMMC flash chips, as an alternative to raw NAND flash chips. 8 bit mmc is commonly used.

---
 arch/arm/boot/dts/sun8i-a23-a33.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

index faea94e45eeb..7abd0ae3143d 100644
@@ -366,6 +366,16 @@
 				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 			};
 
+			mmc2_8bit_pins: mmc2_8bit {
+				allwinner,pins = "PC5", "PC6", "PC8",
+						 "PC9", "PC10", "PC11",
+						 "PC12", "PC13", "PC14",
+						 "PC15";
+				allwinner,function = "mmc2";
+				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+			};
+
 			i2c0_pins_a: i2c0 at 0 {
 				allwinner,pins = "PH2", "PH3";
 				allwinner,function = "i2c0";

2.1.4

The A33 adds an additional pinmux option for uart0 on the PB pins. This was not present on the A23. Nor is it available on the H3, which does not have the PB pingroup.

---
 arch/arm/boot/dts/sun8i-a33.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

index 9b43bc6e7926..85ee08098b7b 100644
@@ -86,4 +86,12 @@
 	compatible = "allwinner,sun8i-a33-pinctrl";
 	interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
 		     <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
+
+	uart0_pins_b: uart0 at 1 {
+		allwinner,pins = "PB0", "PB1";
+		allwinner,function = "uart0";
+		allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+		allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+	};
+
 };

2.1.4

The SinA33 is a core/SDK development board by Sinlinx. The core board does not have any connectors or pads, other than the pads used to connect it to the SDK board.

The core board only has the A33 SoC, 2 RAM chips, an eMMC flash chip, the AXP223 PMIC, and supporting discrete components. eMMC is optional.

The SDK board has a USB host, USB OTG, volume control and home buttons, audio input/output jacks, a micro-SD slot, camera and SDIO expansion headers, an LCD connector, and a GPIO expansion header, which has UARTs, MIPI DSI and I2C available. Only UART0 is enabled though.

---
 arch/arm/boot/dts/Makefile                     |   3 +-
 arch/arm/boot/dts/sun8i-a33-sinlinx-sina33.dts | 129 +++++++++++++++++++++++++
 2 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/sun8i-a33-sinlinx-sina33.dts

index ab033651ad63..5150176bd9ea 100644
@@ -574,7 +574,8 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-a23-ippo-q8h-v5.dtb \
 	sun8i-a23-ippo-q8h-v1.2.dtb \
 	sun8i-a33-et-q8-v1.6.dtb \
-	sun8i-a33-ippo-q8h-v1.2-lcd1024x600.dtb
+	sun8i-a33-ippo-q8h-v1.2-lcd1024x600.dtb \
+	sun8i-a33-sinlinx-sina33.dtb
 dtb-$(CONFIG_MACH_SUN9I) += \
 	sun9i-a80-optimus.dtb \
 	sun9i-a80-cubieboard4.dtb

2.1.4

Hi,

Cool stuff, looks good to me. Note I plan on adding support for the musb and usb-host on the A33 tonight, I've a 10" tablet which has both an otg and a host usb port.

I'm not sure if I'll post the series for this right away as I'm still waiting on some dependencies to get merged first, but keep an eye out on my sunxi-wip tree as something should show up there tonight (CET).

Regards,

Hans

Hi,

I've a series for A23/A33 host usb done at

https://github.com/wens/linux/tree/sun8i-usb-host

which I'm getting ready to post. We're already at -rc6, so the phy driver might not make it. My dev board also has OTG, but VBUS is a physical jumper. I'd be happy to test though. My A23 tablet also wants OTG to have USB ethernet. :)

Thanks!

ChenYu

Applied all three, thanks!

Maxime

Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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