Re: [PATCH v5 27/27] ARM: dts: microchip: sam9x75_curiosity: add sam9x75 curiosity board

[<Varshini.Rajendran@microchip.com>]

On 14/07/24 7:16 pm, claudiu beznea wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Hi, Varshini,
> 
> On 03.07.2024 13:29, Varshini Rajendran wrote:
>> Add device tree file for sam9x75 curiosity board.
>>
>> Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>
>> ---
>> Changes in v5:
>> - Update commit message to match the directory structure.
>> - Alphanumerically sorted Makefile entries.
>> - Corrected VDDCore minimum voltage.
>> - Enabled the i2s node.
>> - Removed additional blank lines.
>> - Enclosed each entry with separate <>.
>> - Corrected pinctrl names to match Microchip convention.
>> - Enabled slewrate in sdmmc node.
>> - Corrected pinmux mask.
>> - Added phandle to leds for ease of access with upcoming device entries.
>> - Updated gpio pin number for red led.
>> ---
>>   arch/arm/boot/dts/microchip/Makefile          |   3 +
>>   .../dts/microchip/at91-sam9x75_curiosity.dts  | 312 ++++++++++++++++++
>>   2 files changed, 315 insertions(+)
>>   create mode 100644 arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
>>
>> diff --git a/arch/arm/boot/dts/microchip/Makefile b/arch/arm/boot/dts/microchip/Makefile
>> index 0c45c8d17468..470fe46433a9 100644
>> --- a/arch/arm/boot/dts/microchip/Makefile
>> +++ b/arch/arm/boot/dts/microchip/Makefile
>> @@ -2,6 +2,7 @@
>>   # Enables support for device-tree overlays
>>   DTC_FLAGS_at91-sam9x60_curiosity := -@
>>   DTC_FLAGS_at91-sam9x60ek := -@
>> +DTC_FLAGS_at91-sam9x75_curiosity := -@
>>   DTC_FLAGS_at91-sama5d27_som1_ek := -@
>>   DTC_FLAGS_at91-sama5d27_wlsom1_ek := -@
>>   DTC_FLAGS_at91-sama5d29_curiosity := -@
>> @@ -60,6 +61,8 @@ dtb-$(CONFIG_SOC_AT91SAM9) += \
>>   dtb-$(CONFIG_SOC_SAM9X60) += \
>>        at91-sam9x60_curiosity.dtb \
>>        at91-sam9x60ek.dtb
>> +dtb-$(CONFIG_SOC_SAM9X7) += \
>> +     at91-sam9x75_curiosity.dtb
>>   dtb-$(CONFIG_SOC_SAM_V7) += \
>>        at91-kizbox2-2.dtb \
>>        at91-kizbox3-hs.dtb \
>> diff --git a/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
>> new file mode 100644
>> index 000000000000..4a4f14f13634
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dts
>> @@ -0,0 +1,312 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * at91-sam9x75_curiosity.dts - Device Tree file for Microchip SAM9X75 Curiosity board
>> + *
>> + * Copyright (C) 2023 Microchip Technology Inc. and its subsidiaries
>> + *
>> + * Author: Varshini Rajendran <varshini.rajendran@microchip.com>
>> + */
>> +/dts-v1/;
>> +#include "sam9x7.dtsi"
>> +#include <dt-bindings/input/input.h>
>> +
>> +/ {
>> +     model = "Microchip SAM9X75 Curiosity";
>> +     compatible = "microchip,sam9x75-curiosity", "microchip,sam9x7", "atmel,at91sam9";
>> +
>> +     aliases {
>> +             i2c0 = &i2c6;
>> +     };
>> +
>> +     chosen {
>> +             stdout-path = "serial0:115200n8";
>> +     };
>> +
>> +     gpio-keys {
>> +             compatible = "gpio-keys";
>> +             pinctrl-names = "default";
>> +             pinctrl-0 = <&pinctrl_key_gpio_default>;
>> +
>> +             button-user {
>> +                     label = "USER";
>> +                     gpios = <&pioC 9 GPIO_ACTIVE_LOW>;
>> +                     linux,code = <KEY_0>;
>> +                     wakeup-source;
>> +             };
>> +     };
>> +
>> +     leds {
>> +             compatible = "gpio-leds";
>> +
>> +             led_red: led-red {
>> +                     label = "red";
>> +                     gpios = <&pioC 14 GPIO_ACTIVE_HIGH>;
>> +                     pinctrl-0 = <&pinctrl_red_led_gpio_default>;
>> +             };
>> +
>> +             led_green: led-green {
>> +                     label = "green";
>> +                     gpios = <&pioC 21 GPIO_ACTIVE_HIGH>;
>> +                     pinctrl-0 = <&pinctrl_green_led_gpio_default>;
>> +             };
>> +
>> +             led_blue: led-blue {
>> +                     label = "blue";
>> +                     gpios = <&pioC 20 GPIO_ACTIVE_HIGH>;
>> +                     pinctrl-0 = <&pinctrl_blue_led_gpio_default>;
>> +                     linux,default-trigger = "heartbeat";
>> +             };
>> +     };
>> +
>> +     memory@20000000 {
>> +             reg = <0x20000000 0x10000000>;
>> +             device_type = "memory";
>> +     };
>> +};
>> +
>> +&classd {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&pinctrl_classd_default>;
>> +     atmel,pwm-type = "diff";
>> +     atmel,non-overlap-time = <10>;
>> +     status = "okay";
>> +};
>> +
>> +&dbgu {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&pinctrl_dbgu_default>;
>> +     status = "okay";
>> +};
>> +
>> +&dma0 {
>> +     status = "okay";
>> +};
>> +
>> +&flx6 {
>> +     atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
>> +     status = "okay";
>> +};
>> +
>> +&i2c6 {
>> +     #address-cells = <1>;
>> +     #size-cells = <0>;
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&pinctrl_flx6_default>;
>> +     i2c-analog-filter;
>> +     i2c-digital-filter;
>> +     i2c-digital-filter-width-ns = <35>;
>> +     status = "okay";
>> +
>> +     pmic@5b {
>> +             compatible = "microchip,mcp16502";
>> +             reg = <0x5b>;
>> +
>> +             regulators {
>> +                     vdd_3v3: VDD_IO {
>> +                             regulator-name = "VDD_IO";
>> +                             regulator-min-microvolt = <3000000>;
>> +                             regulator-max-microvolt = <3600000>;
>> +                             regulator-initial-mode = <2>;
>> +                             regulator-allowed-modes = <2>, <4>;
>> +                             regulator-always-on;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                                     regulator-mode = <4>;
>> +                             };
>> +
>> +                             regulator-state-mem {
>> +                                     regulator-mode = <4>;
>> +                             };
>> +                     };
>> +
>> +                     vddioddr: VDD_DDR {
>> +                             regulator-name = "VDD_DDR";
>> +                             regulator-min-microvolt = <1283000>;
>> +                             regulator-max-microvolt = <1450000>;
>> +                             regulator-initial-mode = <2>;
>> +                             regulator-allowed-modes = <2>, <4>;
>> +                             regulator-always-on;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                                     regulator-mode = <4>;
>> +                             };
>> +
>> +                             regulator-state-mem {
>> +                                     regulator-on-in-suspend;
>> +                                     regulator-mode = <4>;
>> +                             };
>> +                     };
>> +
>> +                     vddcore: VDD_CORE {
>> +                             regulator-name = "VDD_CORE";
>> +                             regulator-min-microvolt = <1140000>;
>> +                             regulator-max-microvolt = <1210000>;
>> +                             regulator-initial-mode = <2>;
>> +                             regulator-allowed-modes = <2>, <4>;
>> +                             regulator-always-on;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                                     regulator-mode = <4>;
>> +                             };
>> +
>> +                             regulator-state-mem {
>> +                                     regulator-mode = <4>;
>> +                             };
>> +                     };
>> +
>> +                     vddcpu: VDD_OTHER {
>> +                             regulator-name = "VDD_OTHER";
>> +                             regulator-min-microvolt = <1700000>;
>> +                             regulator-max-microvolt = <3600000>;
> 
> I haven't got any input on question asked in v4 on the regulator values.
> Are the values from this version the right ones? Is this board supporting
> DVFS or the label name is wrong or maybe the min-max range is still wrong?

Apologies. I misanalysed the comment before. I will fix the regulator 
values/label with the values from the board schematics. And FYI, this 
board does not support DVFS. The values I set are misleading.

> 
>> +                             regulator-initial-mode = <2>;
>> +                             regulator-allowed-modes = <2>, <4>;
>> +                             regulator-ramp-delay = <3125>;
>> +                             regulator-always-on;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                                     regulator-mode = <4>;
>> +                             };
>> +
>> +                             regulator-state-mem {
>> +                                     regulator-mode = <4>;
>> +                             };
>> +                     };
>> +
>> +                     vldo1: LDO1 {
>> +                             regulator-name = "LDO1";
>> +                             regulator-min-microvolt = <1200000>;
>> +                             regulator-max-microvolt = <3700000>;
>> +                             regulator-always-on;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                             };
>> +                     };
>> +
>> +                     vldo2: LDO2 {
>> +                             regulator-name = "LDO2";
>> +                             regulator-min-microvolt = <1200000>;
>> +                             regulator-max-microvolt = <3700000>;
>> +
>> +                             regulator-state-standby {
>> +                                     regulator-on-in-suspend;
>> +                             };
>> +                     };
>> +             };
>> +     };
>> +};
>> +
>> +&i2s {
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&pinctrl_i2s_default>;
>> +     #sound-dai-cells = <0>;
>> +     status = "okay";
>> +};
>> +
>> +&main_xtal {
>> +     clock-frequency = <24000000>;
>> +};
>> +
>> +&pinctrl {
>> +     classd {
>> +             pinctrl_classd_default: classd-default {
>> +                     atmel,pins =
>> +                             <AT91_PIOA 18 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>,
>> +                             <AT91_PIOA 19 AT91_PERIPH_C AT91_PINCTRL_PULL_DOWN>;
>> +             };
>> +     };
>> +
>> +     dbgu {
>> +             pinctrl_dbgu_default: dbgu-default {
>> +                     atmel,pins = <AT91_PIOA 26 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
>> +                                  <AT91_PIOA 27 AT91_PERIPH_A AT91_PINCTRL_NONE>;
>> +             };
>> +     };
>> +
>> +     flexcom {
>> +             pinctrl_flx6_default: flx6-default {
>> +                     atmel,pins =
>> +                             <AT91_PIOA 24 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>,
>> +                             <AT91_PIOA 25 AT91_PERIPH_A AT91_PINCTRL_PULL_UP>;
>> +             };
>> +     };
>> +
>> +     gpio-keys {
>> +             pinctrl_key_gpio_default: key-gpio-default {
>> +                     atmel,pins = <AT91_PIOC 9 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
>> +             };
>> +     };
>> +
>> +     i2s {
>> +             pinctrl_i2s_default: i2s-default {
>> +                     atmel,pins =
>> +                             <AT91_PIOB 26 AT91_PERIPH_D AT91_PINCTRL_NONE>,         /* I2SCK */
>> +                             <AT91_PIOB 15 AT91_PERIPH_D AT91_PINCTRL_NONE>,         /* I2SWS */
>> +                             <AT91_PIOB 16 AT91_PERIPH_D AT91_PINCTRL_NONE>,         /* I2SDIN */
>> +                             <AT91_PIOB 17 AT91_PERIPH_D AT91_PINCTRL_NONE>,         /* I2SDOUT */
>> +                             <AT91_PIOB 25 AT91_PERIPH_D AT91_PINCTRL_NONE>;         /* I2SMCK */
>> +             };
>> +     };
>> +
>> +     leds {
>> +             pinctrl_red_led_gpio_default: red-led-gpio-default {
>> +                     atmel,pins = <AT91_PIOC 14 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
>> +             };
>> +             pinctrl_green_led_gpio_default: green-led-gpio-default {
>> +                     atmel,pins = <AT91_PIOC 21 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
>> +             };
>> +             pinctrl_blue_led_gpio_default: blue-led-gpio-default {
>> +                     atmel,pins = <AT91_PIOC 20 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
>> +             };
>> +     };
>> +
>> +     sdmmc0 {
>> +             pinctrl_sdmmc0_default: sdmmc0-default {
>> +                     atmel,pins =
>> +                             <AT91_PIOA 2 AT91_PERIPH_A (AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>,                               /* PA2 CK  periph A with pullup */
>> +                             <AT91_PIOA 1 AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>,        /* PA1 CMD periph A with pullup */
>> +                             <AT91_PIOA 0 AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>,        /* PA0 DAT0 periph A */
>> +                             <AT91_PIOA 3 AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>,        /* PA3 DAT1 periph A with pullup */
>> +                             <AT91_PIOA 4 AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>,        /* PA4 DAT2 periph A with pullup */
>> +                             <AT91_PIOA 5 AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_DRIVE_STRENGTH_HI | AT91_PINCTRL_SLEWRATE_ENA)>;        /* PA5 DAT3 periph A with pullup */
>> +             };
>> +     };
>> +}; /* pinctrl */
>> +
>> +&rtt {
>> +     atmel,rtt-rtc-time-reg = <&gpbr 0x0>;
>> +};
>> +
>> +&sdmmc0 {
>> +     bus-width = <4>;
>> +     pinctrl-names = "default";
>> +     pinctrl-0 = <&pinctrl_sdmmc0_default>;
>> +     cd-gpios = <&pioA 23 GPIO_ACTIVE_LOW>;
>> +     disable-wp;
>> +     status = "okay";
>> +};
>> +
>> +&slow_xtal {
>> +     clock-frequency = <32768>;
>> +};
>> +
>> +&poweroff {
>> +     debounce-delay-us = <976>;
>> +     status = "okay";
>> +
>> +     input@0 {
>> +             reg = <0>;
>> +     };
>> +};
>> +
>> +&trng {
>> +     status = "okay";
>> +};
>> +
>> +&watchdog {
>> +     status = "okay";
>> +};

-- 
Thanks and Regards,
Varshini Rajendran.