Re: [PATCH 2/2] arm64: dts: Add support for phyBOARD-Electra-AM642

[Wadim Egorov <W.Egorov@phytec.de>]

Am 02.11.22 um 16:10 schrieb Nishanth Menon:
> On 14:49-20221102, Wadim Egorov wrote:
>> Add basic support for phyBOARD-Electra-AM642.
>>
>> Supported features:
>>    * Debug UART
>>    * Heartbeat LED
>>    * GPIO buttons & LEDs
>>    * SPI NOR flash
>>    * SPI TPM Chip
>>    * eMMC
>>    * CAN
>>    * Ethernet
>>    * Micro SD card
>>    * I2C EEPROM
>>    * I2C RTC
>>    * LED Dimmer
>>    * USB
> Optionally: please add a immutable link to the product (if possible
> with board information and details)
>
> Quick scan comments below.
>
>> Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
>> ---
>>   arch/arm64/boot/dts/ti/Makefile               |   1 +
>>   .../boot/dts/ti/k3-am64-phycore-som.dtsi      | 379 ++++++++++++++++++
>>   .../dts/ti/k3-am642-phyboard-electra-rdk.dts  | 313 +++++++++++++++
>>   3 files changed, 693 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
>>   create mode 100644 arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
>>
>> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
>> index 4555a5be2257..79331f16cd4b 100644
>> --- a/arch/arm64/boot/dts/ti/Makefile
>> +++ b/arch/arm64/boot/dts/ti/Makefile
>> @@ -20,6 +20,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-j7200-common-proc-board.dtb
>>   dtb-$(CONFIG_ARCH_K3) += k3-j721s2-common-proc-board.dtb
>>   
>>   dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
>> +dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
>>   dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
>>   
>>   dtb-$(CONFIG_ARCH_K3) += k3-am625-sk.dtb
>> diff --git a/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi b/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
>> new file mode 100644
>> index 000000000000..ecd0050a84e6
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/ti/k3-am64-phycore-som.dtsi
>> @@ -0,0 +1,379 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2021 PHYTEC America, LLC - https://www.phytec.com
>> + * Author: Matt McKee <mmckee@phytec.com>
>> + *
>> + * Copyright (C) 2022 PHYTEC Messtechnik GmbH
>> + * Author: Wadim Egorov <w.egorov@phytec.de>
> Here as well -> so that folks can look at the dtsi file and see where
> the details are?
>
> This is probably an approximate of what I'd hope to see:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=614d47cc9303893c706c0c94516249eb3adaeb80
>
>> + */
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/leds/common.h>
>> +#include <dt-bindings/net/ti-dp83867.h>
>> +
>> +/ {
>> +	model = "PHYTEC phyCORE-AM64x";
>> +	compatible = "phytec,am64-phycore-som";
> Does this match the binding?

Not very sure about the compatible I should chose here. It is probably not very 
important since the compatible gets overridden by the carrier which specifies 
the am642 SoC.
Seems like the TI SoMs (k3-j7*som*.dtsi) do not add a compatible at all.

Or do you think we should add the "ti,am642" compatible here?

>
>> +
>> +	aliases {
>> +		mmc0 = &sdhci0;
>> +		rtc0 = &rv3028;
>> +	};
>> +
>> +	memory@80000000 {
>> +		device_type = "memory";
>> +		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
>> +	};
>> +
>> +	reserved-memory {
>> +		#address-cells = <2>;
>> +		#size-cells = <2>;
>> +		ranges;
>> +
>> +		secure_ddr: optee@9e800000 {
>> +			reg = <0x00 0x9e800000 0x00 0x01800000>; /* for OP-TEE */
>> +			alignment = <0x1000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss0_core0_dma_memory_region: r5f-dma-memory@a0000000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa0000000 0x00 0x100000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss0_core0_memory_region: r5f-memory@a0100000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa0100000 0x00 0xf00000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss0_core1_dma_memory_region: r5f-dma-memory@a1000000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa1000000 0x00 0x100000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss0_core1_memory_region: r5f-memory@a1100000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa1100000 0x00 0xf00000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss1_core0_dma_memory_region: r5f-dma-memory@a2000000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa2000000 0x00 0x100000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss1_core0_memory_region: r5f-memory@a2100000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa2100000 0x00 0xf00000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss1_core1_dma_memory_region: r5f-dma-memory@a3000000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa3000000 0x00 0x100000>;
>> +			no-map;
>> +		};
>> +
>> +		main_r5fss1_core1_memory_region: r5f-memory@a3100000 {
>> +			compatible = "shared-dma-pool";
>> +			reg = <0x00 0xa3100000 0x00 0xf00000>;
>> +			no-map;
>> +		};
>> +
>> +		rtos_ipc_memory_region: ipc-memories@a5000000 {
>> +			reg = <0x00 0xa5000000 0x00 0x00800000>;
>> +			alignment = <0x1000>;
>> +			no-map;
>> +		};
> Does this memory map work for All usage of the SoM and firmware
> combinations? OR would you like to keep the immutable memory map
> reservation in the base device tree and use overlay for firmware
> combination?

Can you be a bit more specific about the firmware and the combinations you are 
talking about?
For now, I just applied the same memory maps as the k3-am642-evm.dts.

Are you referring to the variants of the AM64 which can come with more or less 
R5 cores?
So an AM644 and AM641 would need different entries here and should be adjusted 
e.g. per dt overlays?
In that case it would be nice to have a minimal set of regions defined in the 
som.dtsi.

Regards,
Wadim

>
>> +	};
>> +
>> +	leds {
>> +		compatible = "gpio-leds";
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&leds_pins_default>;
>> +
>> +		led-green {
> please see the pattern property in Documentation/devicetree/bindings/leds/leds-gpio.yaml
>
>> +			function = LED_FUNCTION_HEARTBEAT;
>> +			gpios = <&main_gpio0 12 GPIO_ACTIVE_HIGH>;
>> +			linux,default-trigger = "heartbeat";
>> +			default-state = "on";
>> +		};
>> +	};
>> +
>> +	vcc_5v0_som: fixed-regulator-vcc-5v0-som {
> You would want to see feedback from Krzysztof
> 	https://lore.kernel.org/linux-arm-kernel/c40a2dad-c7aa-f778-f1ac-971185691950@linaro.org/
> on the node naming.
>
>> +		/* VIN / VCC_5V0_SOM */
>> +		compatible = "regulator-fixed";
>> +		regulator-name = "VCC_5V0_SOM";
>> +		regulator-min-microvolt = <5000000>;
>> +		regulator-max-microvolt = <5000000>;
>> +		regulator-always-on;
>> +		regulator-boot-on;
>> +	};
>> +};
>> +
> [...]
>
>> +	rv3028: rtc@52 {
>> +		compatible = "microcrystal,rv3028";
>> +		reg = <0x52>;
>> +		trickle-resistor-ohms = <3000>;
> You might want to alias rtc to make it reliably useful. If this did
> have an interrupt, you could potentially use it as a wakeup source for
> suspend states.
>
>> +	};
>> +
>> +	lp8733: lp8733@61 {
>> +		compatible = "ti,lp8733";
>> +		reg = <0x61>;
>> +
>> +		buck0-in-supply =<&vcc_5v0_som>;
>> +		buck1-in-supply =<&vcc_5v0_som>;
>> +		ldo0-in-supply =<&vdd_3v3>;
>> +		ldo1-in-supply =<&vdd_3v3>;
>> +
>> +		lp8733_regulators: regulators {
>> +			vdd_core: buck0 {
> See regulator comment
>
>> +				regulator-name = "VDD_CORE";
>> +				regulator-min-microvolt = <700000>;
>> +				regulator-max-microvolt = <3300000>;
>> +				regulator-boot-on;
>> +				regulator-always-on;
>> +			};
>> +
> [...]
>
>> diff --git a/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
>> new file mode 100644
>> index 000000000000..70e34fc3592f
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/ti/k3-am642-phyboard-electra-rdk.dts
>> @@ -0,0 +1,313 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 2021 PHYTEC America, LLC - https://www.phytec.com
>> + * Author: Matt McKee <mmckee@phytec.com>
>> + *
>> + * Copyright (C) 2022 PHYTEC Messtechnik GmbH
>> + * Author: Wadim Egorov <w.egorov@phytec.de>
> Same comment for a product link as the SoM
>
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include <dt-bindings/input/input.h>
>> +#include <dt-bindings/leds/leds-pca9532.h>
>> +#include <dt-bindings/mux/ti-serdes.h>
>> +#include <dt-bindings/phy/phy.h>
>> +#include "k3-am642.dtsi"
>> +#include "k3-am64-phycore-som.dtsi"
>> +
>> +/ {
>> +	compatible = "phytec,am642-phyboard-electra-rdk",
>> +		     "phytec,am64-phycore-som", "ti,am642";
>> +	model = "PHYTEC phyBOARD-Electra-AM64x RDK";
>> +
>> +	aliases {
>> +		mmc1 = &sdhci1;
> I plan on fixing aliases so that all aliases are defined in board device
> dts files, I'd suggest doing that right away in your series.
>
> https://lore.kernel.org/linux-arm-kernel/20220830201500.sowmkdyrlizpt6o2@confider/
>
>> +	};
>> +
>> +	chosen {
>> +		stdout-path = &main_uart0;
>> +	};
>> +
> [...]
>
>> +
>> +	gpio-keys {
>> +		compatible = "gpio-keys";
>> +		autorepeat;
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&gpio_keys_pins_default>;
>> +
>> +		key-home {
>> +			label = "home";
>> +			linux,code = <KEY_HOME>;
>> +			gpios = <&main_gpio0 17 GPIO_ACTIVE_HIGH>;
>> +		};
>> +
>> +		key-menu {
>> +			label = "menu";
>> +			linux,code = <KEY_MENU>;
>> +			gpios = <&main_gpio0 21 GPIO_ACTIVE_HIGH>;
>> +		};
>> +	};
>> +
>> +	user-leds {
>> +		compatible = "gpio-leds";
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&user_leds_pins_default>;
>> +
>> +		user-led0 {
> Please follow the node naming pattern
>
>> +			gpios = <&main_gpio0 15 GPIO_ACTIVE_HIGH>;
>> +			linux,default-trigger = "gpio";
> Please check if this matches up with the linux,default-trigger property
>
> Documentation/devicetree/bindings/leds/common.yaml
>
>> +			default-state = "on";
>> +		};
>> +
>> +		user-led1 {
>> +			gpios = <&main_gpio0 16 GPIO_ACTIVE_HIGH>;
>> +			linux,default-trigger = "gpio";
>> +			default-state = "on";
>> +		};
>> +	};
>> +
>> +	vcc_3v3_mmc: fixed-regulator-sd {
> similar comment as before on regulators
>
> [...]
>
>

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