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[0/5] Add support for Pine64 PineTab

Message ID 20200110155225.1051749-1-icenowy@aosc.io
Headers show
Series Add support for Pine64 PineTab | expand

Message

Icenowy Zheng Jan. 10, 2020, 3:52 p.m. UTC
This patchset tries to add support for the PineTab tablet from Pine64.

As it uses a specific MIPI-DSI panel, the support of the panel should be
introduced first, with its DT binding.

Then a device tree is added. Thanks to the community's contributions
these years, we now have most of the functionalities of the tablet
available in this device tree.

Icenowy Zheng (5):
  dt-bindings: vendor-prefix: add Shenzhen Feixin Photoelectics Co., Ltd
  dt-bindings: panel: add Feixin K101 IM2BA02 MIPI-DSI panel
  drm/panel: Add Feixin K101 IM2BA02 panel
  dt-bindings: arm: sunxi: add binding for PineTab tablet
  arm64: dts: allwinner: a64: add support for PineTab

 .../devicetree/bindings/arm/sunxi.yaml        |   5 +
 .../display/panel/feixin,k101-im2ba02.yaml    |  54 ++
 .../devicetree/bindings/vendor-prefixes.yaml  |   2 +
 MAINTAINERS                                   |   6 +
 arch/arm64/boot/dts/allwinner/Makefile        |   1 +
 .../boot/dts/allwinner/sun50i-a64-pinetab.dts | 461 +++++++++++++++
 drivers/gpu/drm/panel/Kconfig                 |   9 +
 drivers/gpu/drm/panel/Makefile                |   1 +
 .../gpu/drm/panel/panel-feixin-k101-im2ba02.c | 548 ++++++++++++++++++
 9 files changed, 1087 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/feixin,k101-im2ba02.yaml
 create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
 create mode 100644 drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c

Comments

Maxime Ripard Jan. 10, 2020, 5:23 p.m. UTC | #1
Hi,

On Fri, Jan 10, 2020 at 11:52:25PM +0800, Icenowy Zheng wrote:
> PineTab is a 10.1" tablet by Pine64 with Allwinner A64 inside.
>
> It includes the following peripherals:
>
> USB:
> - A microUSB Type-B port connected to the OTG-capable USB PHY of
> Allwinner A64. The ID pin is connected to a GPIO of the A64 SoC, and the
> Vbus is connected to the Vbus of AXP803 PMIC. These enables OTG
> functionality on this port.
> - A USB Type-A port is connected to the internal hub attached to the
> non-OTG USB PHY of Allwinner A64.
> - There are reserved pins for an external keyboard connected to the
> internal hub.
>
> Power:
> - The microUSB port has its Vbus connected to AXP803, mentioned above.
> - A DC jack (of a strange size, 2.5mm outer diameter) is connected to
> the ACIN of AXP803.
> - A Li-Polymer battery is connected to the battery pins of AXP803.
>
> Storage:
> - An tradition Pine64 eMMC slot is on the board, mounted with an eMMC
> module by factory.
> - An external microSD slot is hidden under a protect case.
>
> Display:
> - A MIPI-DSI LCD panel (800x1280) is connected to the DSI port of A64 SoC.
> - A mini HDMI port.
>
> Input:
> - A touch panel attached to a Goodix GT9271 touch controller.
> - Volume keys connected to the LRADC of the A64 SoC.
>
> Camera:
> - An OV5640 CMOS camera is at rear, connected to the CSI bus of A64 SoC.
> - A GC2145 CMOS camera is at front, shares the same CSI bus with OV5640.
>
> Audio:
> - A headphone jack is conencted to the SoC's internal codec.
> - A speaker connected is to the Line Out port of SoC's internal codec, via
> an amplifier.
>
> Misc:
> - Debug UART is muxed with the headphone jack, with the switch next to
> the microSD slot.
> - A bosch BMA223 accelerometer is connected to the I2C bus of A64 SoC.
> - Wi-Fi and Bluetooth are available via a RTL8723CS chip, similar to the
> one in Pinebook.
>
> This commit adds a basically usable device tree for it, implementing
> most of the features mentioned above. HDMI is not supported now because
> bad LCD-HDMI coexistence situation of mainline A64 display driver, and
> the front camera currently lacks a driver and a facility to share the
> bus with the rear one.
>
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>  arch/arm64/boot/dts/allwinner/Makefile        |   1 +
>  .../boot/dts/allwinner/sun50i-a64-pinetab.dts | 461 ++++++++++++++++++
>  2 files changed, 462 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
>
> diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
> index cf4f78617c3f..6dad63881cd3 100644
> --- a/arch/arm64/boot/dts/allwinner/Makefile
> +++ b/arch/arm64/boot/dts/allwinner/Makefile
> @@ -9,6 +9,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-orangepi-win.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-lts.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-plus.dtb sun50i-a64-pine64.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinebook.dtb
> +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinetab.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-teres-i.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus.dtb
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
> new file mode 100644
> index 000000000000..1dfa3668636e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
> @@ -0,0 +1,461 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.xyz>
> + *
> + */
> +
> +/dts-v1/;
> +
> +#include "sun50i-a64.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/pwm/pwm.h>
> +
> +/ {
> +	model = "PineTab";
> +	compatible = "pine64,pinetab", "allwinner,sun50i-a64";
> +
> +	aliases {
> +		serial0 = &uart0;
> +		ethernet0 = &rtl8723cs;
> +	};
> +
> +	backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
> +		brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;

Each step should be a perceived step, not a decimal one. So let's say,
if you have 10 steps, each step should be seen as a 10% increase in
brightness. Usually a quadratic increase works better there.

> +&dsi {
> +	vcc-dsi-supply = <&reg_dldo1>;
> +	#address-cells = <1>;
> +	#size-cells = <0>;
> +	status = "okay";

address-cells and size-cells aren't in the DTSI? They should be.

> +
> +	panel@0 {
> +		compatible = "feixin,k101-im2ba02";
> +		reg = <0>;
> +		avdd-supply = <&reg_dc1sw>;
> +		dvdd-supply = <&reg_dc1sw>;
> +		cvdd-supply = <&reg_ldo_io1>;
> +		reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> +		backlight = <&backlight>;
> +	};
> +};
> +
> +&ehci0 {
> +	status = "okay";
> +};
> +
> +&ehci1 {
> +	status = "okay";
> +};
> +
> +&i2c0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c0_pins>;

That should be set in the DTSI already?

> +	status = "okay";
> +
> +	touchscreen@5d {
> +		compatible = "goodix,gt9271";
> +		reg = <0x5d>;
> +		interrupt-parent = <&pio>;
> +		interrupts = <7 4 IRQ_TYPE_LEVEL_HIGH>; /* PH4 */
> +		irq-gpios = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
> +		reset-gpios = <&pio 7 8 GPIO_ACTIVE_HIGH>; /* PH8 */
> +		AVDD28-supply = <&reg_ldo_io1>;
> +	};
> +};
> +
> +&i2c0_pins {
> +	bias-pull-up;
> +};
> +
> +&i2c1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c1_pins>;

Ditto

> +	status = "okay";
> +
> +	bma223@18 {
> +		compatible = "bosch,bma223", "bosch,bma222e";
> +		reg = <0x18>;
> +		interrupt-parent = <&pio>;
> +		interrupts = <7 5 IRQ_TYPE_LEVEL_HIGH>; /* PH5 */
> +		mount-matrix = "0", "-1", "0",
> +			       "-1", "0", "0",
> +			       "0", "0", "-1";
> +	};
> +};
> +
> +&lradc {
> +	vref-supply = <&reg_aldo3>;
> +	status = "okay";
> +
> +	button-200 {
> +		label = "Volume Up";
> +		linux,code = <KEY_VOLUMEUP>;
> +		channel = <0>;
> +		voltage = <200000>;
> +	};
> +
> +	button-400 {
> +		label = "Volume Down";
> +		linux,code = <KEY_VOLUMEDOWN>;
> +		channel = <0>;
> +		voltage = <400000>;
> +	};
> +};
> +
> +&mixer1 {
> +	status = "okay";
> +};
> +
> +&mmc0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc0_pins>;

Ditto

> +	vmmc-supply = <&reg_dcdc1>;
> +	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;
> +	disable-wp;
> +	bus-width = <4>;
> +	status = "okay";
> +};
> +
> +&mmc1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc1_pins>;

Ditto

> +	vmmc-supply = <&reg_dldo4>;
> +	vqmmc-supply = <&reg_eldo1>;
> +	mmc-pwrseq = <&wifi_pwrseq>;
> +	bus-width = <4>;
> +	non-removable;
> +	status = "okay";
> +
> +	rtl8723cs: wifi@1 {
> +		reg = <1>;
> +	};
> +};
> +
> +&mmc2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc2_pins>;

Ditto

Looks good otherwise, thanks!
Maxime
Sam Ravnborg Jan. 10, 2020, 5:46 p.m. UTC | #2
Hi Icenowy.

On Fri, Jan 10, 2020 at 11:52:23PM +0800, Icenowy Zheng wrote:
> Feixin K101 IM2BA02 is a 800x1280 4-lane MIPI-DSI LCD panel.
> 
> Add a panel driver for it.
Thanks, driver looks really good.
Only a few comments/nits below.

	Sam
> 
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>  MAINTAINERS                                   |   6 +
>  drivers/gpu/drm/panel/Kconfig                 |   9 +
>  drivers/gpu/drm/panel/Makefile                |   1 +
>  .../gpu/drm/panel/panel-feixin-k101-im2ba02.c | 548 ++++++++++++++++++
>  4 files changed, 564 insertions(+)
>  create mode 100644 drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
> 

> new file mode 100644
> index 000000000000..45a62bdabb3f
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
> @@ -0,0 +1,548 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (C) 2019-2020 Icenowy Zheng <icenowy@aosc.io>
> + */
> +
> +#include <linux/gpio/consumer.h>
> +#include <linux/delay.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_modes.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
Sorted and in the right order - good.

> +
> +static int k101_im2ba02_prepare(struct drm_panel *panel)
> +{
> +	struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
> +	struct mipi_dsi_device *dsi = ctx->dsi;
> +	unsigned int i;
> +	int ret;
> +
> +	ret = regulator_enable(ctx->avdd);
> +	if (ret)
> +		return ret;
> +
> +	msleep(20);
> +
> +	ret = regulator_enable(ctx->dvdd);
> +	if (ret)
> +		return ret;
> +
> +	msleep(20);
> +
> +	ret = regulator_enable(ctx->cvdd);
> +	if (ret)
> +		return ret;

Unless the msleep() between is regulator_enable() really is needed,
this change this to use regulator_bulk_enable().

If the above is kept then please do proper error handling
where all enabled regulators are disable in case of errors.

> +
> +	msleep(30);
> +
> +	gpiod_set_value(ctx->reset, 1);
> +	msleep(50);
> +
> +	gpiod_set_value(ctx->reset, 0);
> +	msleep(50);
> +
> +	gpiod_set_value(ctx->reset, 1);
> +	msleep(200);
> +
> +	for (i = 0; i < ARRAY_SIZE(k101_im2ba02_init_cmds); i++) {
> +		const struct k101_im2ba02_init_cmd *cmd = &k101_im2ba02_init_cmds[i];
> +
> +		ret = mipi_dsi_dcs_write_buffer(dsi, cmd->data, K101_IM2BA02_INIT_CMD_LEN);
> +		if (ret < 0)
> +			return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int k101_im2ba02_enable(struct drm_panel *panel)
> +{
> +	struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
> +	const struct k101_im2ba02_init_cmd *cmd = &timed_cmds[1];
> +	int ret;
> +
> +	msleep(150);
> +
> +	ret = mipi_dsi_dcs_set_display_on(ctx->dsi);
> +	if (ret < 0)
> +		return ret;
> +
> +	msleep(50);
> +
> +	return mipi_dsi_dcs_write_buffer(ctx->dsi, cmd->data, K101_IM2BA02_INIT_CMD_LEN);
> +	if (ret < 0)
> +		return ret;
The last two lines can be deleted - they are never reached.

> +}
> +
> +static int k101_im2ba02_disable(struct drm_panel *panel)
> +{
> +	struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
> +
> +	return mipi_dsi_dcs_set_display_off(ctx->dsi);
> +}
> +
> +static int k101_im2ba02_unprepare(struct drm_panel *panel)
> +{
> +	struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
> +	int ret;
> +
> +	ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
> +	if (ret < 0)
> +		DRM_DEV_ERROR(panel->dev, "failed to set display off: %d\n",
> +			      ret);
> +
> +	ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
> +	if (ret < 0)
> +		DRM_DEV_ERROR(panel->dev, "failed to enter sleep mode: %d\n",
> +			      ret);
> +
> +	msleep(200);
> +
> +	gpiod_set_value(ctx->reset, 0);
> +
> +	msleep(20);
> +
> +	regulator_disable(ctx->cvdd);
> +
> +	msleep(20);
> +
> +	regulator_disable(ctx->dvdd);
> +
> +	msleep(20);
> +
> +	regulator_disable(ctx->avdd);
Can we get rid of a few empty lines here?
If the 20 msecs are not really needed then use regulator_bulk_disable()


> +	return 0;
> +}
> +
> +static const struct drm_display_mode k101_im2ba02_default_mode = {
> +	.clock = 70000,
> +	.vrefresh = 60,
> +
> +	.hdisplay = 800,
> +	.hsync_start = 800 + 20,
> +	.hsync_end = 800 + 20 + 20,
> +	.htotal = 800 + 20 + 20 + 20,
> +
> +	.vdisplay = 1280,
> +	.vsync_start = 1280 + 16,
> +	.vsync_end = 1280 + 16 + 4,
> +	.vtotal = 1280 + 16 + 4 + 4,
> +
> +	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
> +	.width_mm	= 136,
> +	.height_mm	= 217,
> +};
> +
> +static int k101_im2ba02_get_modes(struct drm_panel *panel,
> +				  struct drm_connector *connector)
> +{
> +	struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
> +	struct drm_display_mode *mode;
> +
> +	mode = drm_mode_duplicate(connector->dev, &k101_im2ba02_default_mode);
> +	if (!mode) {
> +		DRM_DEV_ERROR(&ctx->dsi->dev, "failed to add mode %ux%ux@%u\n",
> +			      k101_im2ba02_default_mode.hdisplay,
> +			      k101_im2ba02_default_mode.vdisplay,
> +			      k101_im2ba02_default_mode.vrefresh);
> +		return -ENOMEM;
> +	}
> +
> +	drm_mode_set_name(mode);
> +
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	connector->display_info.width_mm = mode->width_mm;
> +	connector->display_info.height_mm = mode->height_mm;
> +	drm_mode_probed_add(connector, mode);
> +
> +	return 1;
> +}
> +
> +static const struct drm_panel_funcs k101_im2ba02_funcs = {
> +	.disable = k101_im2ba02_disable,
> +	.unprepare = k101_im2ba02_unprepare,
> +	.prepare = k101_im2ba02_prepare,
> +	.enable = k101_im2ba02_enable,
> +	.get_modes = k101_im2ba02_get_modes,
> +};
> +
> +static int k101_im2ba02_dsi_probe(struct mipi_dsi_device *dsi)
> +{
> +	struct k101_im2ba02 *ctx;
> +	int ret;
> +
> +	ctx = devm_kzalloc(&dsi->dev, sizeof(*ctx), GFP_KERNEL);
> +	if (!ctx)
> +		return -ENOMEM;
> +
> +	mipi_dsi_set_drvdata(dsi, ctx);
> +	ctx->dsi = dsi;
> +
> +	ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
> +	if (IS_ERR(ctx->dvdd)) {
> +		DRM_DEV_ERROR(&dsi->dev, "Couldn't get dvdd regulator\n");
> +		return PTR_ERR(ctx->dvdd);
> +	}
> +
> +	ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
> +	if (IS_ERR(ctx->avdd)) {
> +		DRM_DEV_ERROR(&dsi->dev, "Couldn't get avdd regulator\n");
> +		return PTR_ERR(ctx->avdd);
> +	}
> +
> +	ctx->cvdd = devm_regulator_get(&dsi->dev, "cvdd");
> +	if (IS_ERR(ctx->cvdd)) {
> +		DRM_DEV_ERROR(&dsi->dev, "Couldn't get cvdd regulator\n");
> +		return PTR_ERR(ctx->cvdd);
> +	}
> +
> +	ctx->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
> +	if (IS_ERR(ctx->reset)) {
> +		DRM_DEV_ERROR(&dsi->dev, "Couldn't get our reset GPIO\n");
> +		return PTR_ERR(ctx->reset);
> +	}
> +
> +	drm_panel_init(&ctx->panel, &dsi->dev, &k101_im2ba02_funcs,
> +		       DRM_MODE_CONNECTOR_DSI);
> +
> +	ret = drm_panel_of_backlight(&ctx->panel);
> +	if (ret)
> +		return ret;
> +
> +	ret = drm_panel_add(&ctx->panel);
> +	if (ret < 0)
> +		return ret;
> +
> +	dsi->mode_flags = MIPI_DSI_MODE_VIDEO;
> +	dsi->format = MIPI_DSI_FMT_RGB888;
> +	dsi->lanes = 4;
> +
> +	ret = mipi_dsi_attach(dsi);
> +	if (ret < 0) {
> +		drm_panel_remove(&ctx->panel);
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int k101_im2ba02_dsi_remove(struct mipi_dsi_device *dsi)
> +{
> +	struct k101_im2ba02 *ctx = mipi_dsi_get_drvdata(dsi);
> +
> +	mipi_dsi_detach(dsi);
> +	drm_panel_remove(&ctx->panel);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id k101_im2ba02_of_match[] = {
> +	{ .compatible = "feixin,k101-im2ba02", },
> +	{ }
Use { /* sentinel */ },

> +};
> +MODULE_DEVICE_TABLE(of, k101_im2ba02_of_match);
> +
> +static struct mipi_dsi_driver k101_im2ba02_driver = {
> +	.probe = k101_im2ba02_dsi_probe,
> +	.remove = k101_im2ba02_dsi_remove,
> +	.driver = {
> +		.name = "feixin-k101-im2ba02",
> +		.of_match_table = k101_im2ba02_of_match,
> +	},
> +};
> +module_mipi_dsi_driver(k101_im2ba02_driver);
> +
> +MODULE_AUTHOR("Icenowy Zheng <icenowy@aosc.io>");
> +MODULE_DESCRIPTION("Feixin K101 IM2BA02 MIPI-DSI LCD panel");
> +MODULE_LICENSE("GPL");
> -- 
> 2.23.0
Sam Ravnborg Jan. 10, 2020, 6:12 p.m. UTC | #3
Hi Icenowy.

checkpatch noticed a small inconsistency in the i2c1 node.

> 
> Misc:
> - Debug UART is muxed with the headphone jack, with the switch next to
> the microSD slot.
> - A bosch BMA223 accelerometer is connected to the I2C bus of A64 SoC.
> - Wi-Fi and Bluetooth are available via a RTL8723CS chip, similar to the
> one in Pinebook.
> 
> +
> +&i2c1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c1_pins>;
> +	status = "okay";
> +
> +	bma223@18 {
> +		compatible = "bosch,bma223", "bosch,bma222e";
These compatible have no binding file?!?


> +		reg = <0x18>;
> +		interrupt-parent = <&pio>;
> +		interrupts = <7 5 IRQ_TYPE_LEVEL_HIGH>; /* PH5 */
> +		mount-matrix = "0", "-1", "0",
> +			       "-1", "0", "0",
> +			       "0", "0", "-1";
> +	};
> +};

bosch,bma222e is referenced by a driver, whereas this is the
first reference of bosch,bma223.

	Sam
Vasily Khoruzhick Jan. 10, 2020, 6:51 p.m. UTC | #4
On Fri, Jan 10, 2020 at 7:54 AM Icenowy Zheng <icenowy@aosc.io> wrote:
>
> PineTab is a 10.1" tablet by Pine64 with Allwinner A64 inside.
>
> It includes the following peripherals:
>
> USB:
> - A microUSB Type-B port connected to the OTG-capable USB PHY of
> Allwinner A64. The ID pin is connected to a GPIO of the A64 SoC, and the
> Vbus is connected to the Vbus of AXP803 PMIC. These enables OTG
> functionality on this port.
> - A USB Type-A port is connected to the internal hub attached to the
> non-OTG USB PHY of Allwinner A64.
> - There are reserved pins for an external keyboard connected to the
> internal hub.
>
> Power:
> - The microUSB port has its Vbus connected to AXP803, mentioned above.
> - A DC jack (of a strange size, 2.5mm outer diameter) is connected to
> the ACIN of AXP803.
> - A Li-Polymer battery is connected to the battery pins of AXP803.
>
> Storage:
> - An tradition Pine64 eMMC slot is on the board, mounted with an eMMC
> module by factory.
> - An external microSD slot is hidden under a protect case.
>
> Display:
> - A MIPI-DSI LCD panel (800x1280) is connected to the DSI port of A64 SoC.
> - A mini HDMI port.
>
> Input:
> - A touch panel attached to a Goodix GT9271 touch controller.
> - Volume keys connected to the LRADC of the A64 SoC.
>
> Camera:
> - An OV5640 CMOS camera is at rear, connected to the CSI bus of A64 SoC.
> - A GC2145 CMOS camera is at front, shares the same CSI bus with OV5640.
>
> Audio:
> - A headphone jack is conencted to the SoC's internal codec.
> - A speaker connected is to the Line Out port of SoC's internal codec, via
> an amplifier.
>
> Misc:
> - Debug UART is muxed with the headphone jack, with the switch next to
> the microSD slot.
> - A bosch BMA223 accelerometer is connected to the I2C bus of A64 SoC.
> - Wi-Fi and Bluetooth are available via a RTL8723CS chip, similar to the
> one in Pinebook.
>
> This commit adds a basically usable device tree for it, implementing
> most of the features mentioned above. HDMI is not supported now because
> bad LCD-HDMI coexistence situation of mainline A64 display driver, and
> the front camera currently lacks a driver and a facility to share the
> bus with the rear one.
>
> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
> ---
>  arch/arm64/boot/dts/allwinner/Makefile        |   1 +
>  .../boot/dts/allwinner/sun50i-a64-pinetab.dts | 461 ++++++++++++++++++
>  2 files changed, 462 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
>
> diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
> index cf4f78617c3f..6dad63881cd3 100644
> --- a/arch/arm64/boot/dts/allwinner/Makefile
> +++ b/arch/arm64/boot/dts/allwinner/Makefile
> @@ -9,6 +9,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-orangepi-win.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-lts.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-plus.dtb sun50i-a64-pine64.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinebook.dtb
> +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinetab.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-teres-i.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus.dtb
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
> new file mode 100644
> index 000000000000..1dfa3668636e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinetab.dts
> @@ -0,0 +1,461 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2019 Icenowy Zheng <icenowy@aosc.xyz>
> + *
> + */
> +
> +/dts-v1/;
> +
> +#include "sun50i-a64.dtsi"

You may want to include dtsi with OPP for A64 here if you want to enable DVFS

> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include <dt-bindings/pwm/pwm.h>
> +
> +/ {
> +       model = "PineTab";
> +       compatible = "pine64,pinetab", "allwinner,sun50i-a64";
> +
> +       aliases {
> +               serial0 = &uart0;
> +               ethernet0 = &rtl8723cs;
> +       };
> +
> +       backlight: backlight {
> +               compatible = "pwm-backlight";
> +               pwms = <&pwm 0 50000 PWM_POLARITY_INVERTED>;
> +               brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
> +               default-brightness-level = <8>;
> +               enable-gpios = <&pio 3 23 GPIO_ACTIVE_HIGH>; /* PD23 */
> +               power-supply = <&vdd_bl>;
> +       };
> +
> +       chosen {
> +               stdout-path = "serial0:115200n8";
> +       };
> +
> +       i2c-csi {
> +               compatible = "i2c-gpio";
> +               sda-gpios = <&pio 4 13 GPIO_ACTIVE_HIGH>; /* PE13 */
> +               scl-gpios = <&pio 4 12 GPIO_ACTIVE_HIGH>; /* PE12 */
> +               i2c-gpio,delay-us = <5>;
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               /* Rear camera */
> +               ov5640: camera@3c {
> +                       compatible = "ovti,ov5640";
> +                       reg = <0x3c>;
> +                       pinctrl-names = "default";
> +                       pinctrl-0 = <&csi_mclk_pin>;
> +                       clocks = <&ccu CLK_CSI_MCLK>;
> +                       clock-names = "xclk";
> +
> +                       AVDD-supply = <&reg_dldo3>;
> +                       DOVDD-supply = <&reg_aldo1>;
> +                       DVDD-supply = <&reg_eldo3>;
> +                       reset-gpios = <&pio 4 14 GPIO_ACTIVE_LOW>; /* PE14 */
> +                       powerdown-gpios = <&pio 4 15 GPIO_ACTIVE_HIGH>; /* PE15 */
> +
> +                       port {
> +                               ov5640_ep: endpoint {
> +                                       remote-endpoint = <&csi_ep>;
> +                                       bus-width = <8>;
> +                                       hsync-active = <1>; /* Active high */
> +                                       vsync-active = <0>; /* Active low */
> +                                       data-active = <1>;  /* Active high */
> +                                       pclk-sample = <1>;  /* Rising */
> +                               };
> +                       };
> +               };
> +       };
> +
> +       speaker_amp: audio-amplifier {
> +               compatible = "simple-audio-amplifier";
> +               enable-gpios = <&pio 7 7 GPIO_ACTIVE_HIGH>; /* PH7 */
> +               sound-name-prefix = "Speaker Amp";
> +       };
> +
> +       vdd_bl: regulator@0 {
> +               compatible = "regulator-fixed";
> +               regulator-name = "bl-3v3";
> +               regulator-min-microvolt = <3300000>;
> +               regulator-max-microvolt = <3300000>;
> +               gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
> +               enable-active-high;
> +       };
> +
> +       wifi_pwrseq: wifi_pwrseq {
> +               compatible = "mmc-pwrseq-simple";
> +               reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
> +               post-power-on-delay-ms = <200>;
> +       };
> +};
> +
> +&codec {
> +       status = "okay";
> +};
> +
> +&codec_analog {
> +       hpvcc-supply = <&reg_eldo1>;
> +       status = "okay";
> +};
> +
> +&cpu0 {
> +       cpu-supply = <&reg_dcdc2>;
> +};

I believe you need CPU regulator for each CPU. I'm aware that we share
clock and regulator for all the CPUs but what would happen if you put
CPU0 offline?

> +
> +&csi {
> +       status = "okay";
> +
> +       port {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               csi_ep: endpoint {
> +                       remote-endpoint = <&ov5640_ep>;
> +                       bus-width = <8>;
> +                       hsync-active = <1>; /* Active high */
> +                       vsync-active = <0>; /* Active low */
> +                       data-active = <1>;  /* Active high */
> +                       pclk-sample = <1>;  /* Rising */
> +               };
> +       };
> +};
> +
> +&dai {
> +       status = "okay";
> +};
> +
> +&de {
> +       status = "okay";
> +};
> +
> +&dphy {
> +       status = "okay";
> +};
> +
> +&dsi {
> +       vcc-dsi-supply = <&reg_dldo1>;
> +       #address-cells = <1>;
> +       #size-cells = <0>;
> +       status = "okay";
> +
> +       panel@0 {
> +               compatible = "feixin,k101-im2ba02";
> +               reg = <0>;
> +               avdd-supply = <&reg_dc1sw>;
> +               dvdd-supply = <&reg_dc1sw>;
> +               cvdd-supply = <&reg_ldo_io1>;
> +               reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
> +               backlight = <&backlight>;
> +       };
> +};
> +
> +&ehci0 {
> +       status = "okay";
> +};
> +
> +&ehci1 {
> +       status = "okay";
> +};
> +
> +&i2c0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c0_pins>;
> +       status = "okay";
> +
> +       touchscreen@5d {
> +               compatible = "goodix,gt9271";
> +               reg = <0x5d>;
> +               interrupt-parent = <&pio>;
> +               interrupts = <7 4 IRQ_TYPE_LEVEL_HIGH>; /* PH4 */
> +               irq-gpios = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */
> +               reset-gpios = <&pio 7 8 GPIO_ACTIVE_HIGH>; /* PH8 */
> +               AVDD28-supply = <&reg_ldo_io1>;
> +       };
> +};
> +
> +&i2c0_pins {
> +       bias-pull-up;
> +};
> +
> +&i2c1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c1_pins>;
> +       status = "okay";
> +
> +       bma223@18 {
> +               compatible = "bosch,bma223", "bosch,bma222e";
> +               reg = <0x18>;
> +               interrupt-parent = <&pio>;
> +               interrupts = <7 5 IRQ_TYPE_LEVEL_HIGH>; /* PH5 */
> +               mount-matrix = "0", "-1", "0",
> +                              "-1", "0", "0",
> +                              "0", "0", "-1";
> +       };
> +};
> +
> +&lradc {
> +       vref-supply = <&reg_aldo3>;
> +       status = "okay";
> +
> +       button-200 {
> +               label = "Volume Up";
> +               linux,code = <KEY_VOLUMEUP>;
> +               channel = <0>;
> +               voltage = <200000>;
> +       };
> +
> +       button-400 {
> +               label = "Volume Down";
> +               linux,code = <KEY_VOLUMEDOWN>;
> +               channel = <0>;
> +               voltage = <400000>;
> +       };
> +};
> +
> +&mixer1 {
> +       status = "okay";
> +};
> +
> +&mmc0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc0_pins>;
> +       vmmc-supply = <&reg_dcdc1>;
> +       cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;
> +       disable-wp;
> +       bus-width = <4>;
> +       status = "okay";
> +};
> +
> +&mmc1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc1_pins>;
> +       vmmc-supply = <&reg_dldo4>;
> +       vqmmc-supply = <&reg_eldo1>;
> +       mmc-pwrseq = <&wifi_pwrseq>;
> +       bus-width = <4>;
> +       non-removable;
> +       status = "okay";
> +
> +       rtl8723cs: wifi@1 {
> +               reg = <1>;
> +       };
> +};
> +
> +&mmc2 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc2_pins>;
> +       vmmc-supply = <&reg_dcdc1>;
> +       vqmmc-supply = <&reg_dcdc1>;
> +       bus-width = <8>;
> +       non-removable;
> +       cap-mmc-hw-reset;
> +       status = "okay";
> +};
> +
> +&ohci0 {
> +       status = "okay";
> +};
> +
> +&pwm {
> +       status = "okay";
> +};
> +
> +&r_rsb {
> +       status = "okay";
> +
> +       axp803: pmic@3a3 {
> +               compatible = "x-powers,axp803";
> +               reg = <0x3a3>;
> +               interrupt-parent = <&r_intc>;
> +               interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +               x-powers,drive-vbus-en;
> +       };
> +};
> +
> +#include "axp803.dtsi"
> +
> +&ac_power_supply {
> +       status = "okay";
> +};
> +
> +&battery_power_supply {
> +       status = "okay";
> +};
> +
> +&reg_aldo1 {
> +       regulator-min-microvolt = <2800000>;
> +       regulator-max-microvolt = <2800000>;
> +       regulator-name = "dovdd-csi";
> +};
> +
> +&reg_aldo2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-pl";
> +};
> +
> +&reg_aldo3 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <2700000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-pll-avcc";
> +};
> +
> +&reg_dc1sw {
> +       regulator-name = "vcc-lcd";
> +};
> +
> +&reg_dcdc1 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-3v3";
> +};
> +
> +&reg_dcdc2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1000000>;
> +       regulator-max-microvolt = <1300000>;
> +       regulator-name = "vdd-cpux";
> +};
> +
> +/* DCDC3 is polyphased with DCDC2 */
> +
> +&reg_dcdc5 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1200000>;
> +       regulator-max-microvolt = <1200000>;
> +       regulator-name = "vcc-dram";
> +};
> +
> +&reg_dcdc6 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1100000>;
> +       regulator-max-microvolt = <1100000>;
> +       regulator-name = "vdd-sys";
> +};
> +
> +&reg_dldo1 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-hdmi-dsi-sensor";
> +};
> +
> +&reg_dldo3 {
> +       regulator-min-microvolt = <2800000>;
> +       regulator-max-microvolt = <2800000>;
> +       regulator-name = "avdd-csi";
> +};
> +
> +&reg_dldo4 {
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-wifi";
> +};
> +
> +&reg_drivevbus {
> +       regulator-name = "usb0-vbus";
> +       status = "okay";
> +};
> +
> +&reg_eldo1 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       regulator-name = "cpvdd";
> +};
> +
> +&reg_eldo2 {
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       regulator-name = "vcca-1v8";
> +};
> +
> +&reg_eldo3 {
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       regulator-name = "dvdd-1v8-csi";
> +};
> +
> +&reg_fldo1 {
> +       regulator-min-microvolt = <1200000>;
> +       regulator-max-microvolt = <1200000>;
> +       regulator-name = "vcc-1v2-hsic";
> +};
> +
> +&reg_fldo2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1100000>;
> +       regulator-max-microvolt = <1100000>;
> +       regulator-name = "vdd-cpus";
> +};
> +
> +&reg_ldo_io0 {
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-usb";
> +       status = "okay";
> +};
> +
> +&reg_ldo_io1 {
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-enable-ramp-delay = <3500000>;
> +       regulator-name = "vcc-touchscreen";
> +       status = "okay";
> +};
> +
> +&reg_rtc_ldo {
> +       regulator-name = "vcc-rtc";
> +};
> +
> +&sound {
> +       status = "okay";
> +       simple-audio-card,aux-devs = <&codec_analog>, <&speaker_amp>;
> +       simple-audio-card,widgets = "Microphone", "Internal Microphone Left",
> +                                   "Microphone", "Internal Microphone Right",
> +                                   "Headphone", "Headphone Jack",
> +                                   "Speaker", "Internal Speaker";
> +       simple-audio-card,routing =
> +                       "Left DAC", "AIF1 Slot 0 Left",
> +                       "Right DAC", "AIF1 Slot 0 Right",
> +                       "Speaker Amp INL", "LINEOUT",
> +                       "Speaker Amp INR", "LINEOUT",
> +                       "Internal Speaker", "Speaker Amp OUTL",
> +                       "Internal Speaker", "Speaker Amp OUTR",
> +                       "Headphone Jack", "HP",
> +                       "AIF1 Slot 0 Left ADC", "Left ADC",
> +                       "AIF1 Slot 0 Right ADC", "Right ADC",
> +                       "Internal Microphone Left", "MBIAS",
> +                       "MIC1", "Internal Microphone Left",
> +                       "Internal Microphone Right", "HBIAS",
> +                       "MIC2", "Internal Microphone Right";
> +};
> +
> +&uart0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&uart0_pb_pins>;
> +       status = "okay";
> +};
> +
> +&usb_otg {
> +       dr_mode = "otg";
> +       status = "okay";
> +};
> +
> +&usb_power_supply {
> +       status = "okay";
> +};
> +
> +&usbphy {
> +       usb0_id_det-gpios = <&pio 7 9 GPIO_ACTIVE_HIGH>; /* PH9 */
> +       usb0_vbus_power-supply = <&usb_power_supply>;
> +       usb0_vbus-supply = <&reg_drivevbus>;
> +       usb1_vbus-supply = <&reg_ldo_io0>;
> +       status = "okay";
> +};
> --
> 2.23.0
>
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