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Message-ID: <CAJKOXPf9BVXP19Yt36uEKz=bzMh3cDd6_wdyxoRRX3itk9kuhw@mail.gmail.com>
Date: Fri, 22 Jun 2018 09:41:02 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Cc: kgene@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
linux@...linux.org.uk, linux-arm-kernel@...ts.infradead.org,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, xc-racer2@...e.ca
Subject: Re: [PATCH 2/7] ARM: dts: s5pv210: Add initial DTS for Samsung Aries
based phones.
On 21 June 2018 at 21:09, Paweł Chmiel <pawel.mikolaj.chmiel@...il.com> wrote:
> This DTS file have initial support Samsung Aries based phones.
> Initial version have support for:
> - sdcard
> - internal memory (present only on non 4g variant)
> - max8998 pmic and rtc
> - max17040 fuel gauge
> - gpio keys
> - fimd (no panel driver yet)
> - usb (peripherial mode)
> - wifi
>
> Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>
Hi Pawel,
Nice job in mainlining!
Below you'll find some comments for improvement.
> ---
> arch/arm/boot/dts/s5pv210-aries.dtsi | 397 +++++++++++++++++++++++++++++++++++
> 1 file changed, 397 insertions(+)
> create mode 100644 arch/arm/boot/dts/s5pv210-aries.dtsi
>
> diff --git a/arch/arm/boot/dts/s5pv210-aries.dtsi b/arch/arm/boot/dts/s5pv210-aries.dtsi
> new file mode 100644
> index 000000000000..6e8ac3615765
> --- /dev/null
> +++ b/arch/arm/boot/dts/s5pv210-aries.dtsi
> @@ -0,0 +1,397 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Samsung's S5PV210 based Galaxy Aries board device tree source
> + */
> +
> +/dts-v1/;
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/input/input.h>
Is the input header used here?
> +#include <dt-bindings/interrupt-controller/irq.h>
Duplicated inclusion.
> +#include "s5pv210.dtsi"
> +
> +/ {
> + compatible = "samsung,aries", "samsung,s5pv210";
> +
> + aliases {
> + i2c6 = &i2c_pmic;
> + i2c9 = &i2c_fuel;
> + };
> +
> + memory@...00000 {
> + device_type = "memory";
> + reg = <0x30000000 0x05000000
> + 0x40000000 0x10000000
> + 0x50000000 0x08000000>;
> + };
> +
> + wifi_pwrseq: wifi-pwrseq {
> + compatible = "mmc-pwrseq-simple";
> + reset-gpios = <&gpg1 2 GPIO_ACTIVE_LOW>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&wlan_gpio_rst>;
> + post-power-on-delay-ms = <500>;
> + power-off-delay-us = <500>;
> + };
> +
> + i2c_pmic: i2c-pmic {
s/i2c-pmic/ to /i2c-gpio-0/
to reflect generic class of this node. Change only the node name. The
label can stay as is.
> + compatible = "i2c-gpio";
> + sda-gpios = <&gpj4 0 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
> + scl-gpios = <&gpj4 3 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
Spaces around pipe |.
> + i2c-gpio,delay-us = <2>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + pmic@66 {
> + compatible = "maxim,max8998";
> + reg = <0x66>;
> + interrupt-parent = <&gph0>;
> + interrupts = <7 0>;
If you really wanted 0 then IRQ_TYPE_NONE... but this should be a
proper interrupt type.
> +
> + max8998,pmic-buck1-default-dvs-idx = <1>;
> + max8998,pmic-buck1-dvs-gpios = <&gph0 3 GPIO_ACTIVE_HIGH>,
> + <&gph0 4 GPIO_ACTIVE_HIGH>;
> + max8998,pmic-buck1-dvs-voltage = <1275000>, <1200000>,
> + <1050000>, <950000>;
> +
> + max8998,pmic-buck2-default-dvs-idx = <0>;
> + max8998,pmic-buck2-dvs-gpio = <&gph0 5 GPIO_ACTIVE_HIGH>;
> + max8998,pmic-buck2-dvs-voltage = <1100000>, <1000000>;
> +
> + regulators {
> + ldo2_reg: LDO2 {
> + regulator-name = "VALIVE_1.2V";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-always-on;
> +
> + regulator-state-mem {
> + regulator-on-in-suspend;
> + };
> + };
> +
> + ldo3_reg: LDO3 {
> + regulator-name = "VUSB_1.1V";
> + regulator-min-microvolt = <1100000>;
> + regulator-max-microvolt = <1100000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo4_reg: LDO4 {
> + regulator-name = "VADC_3.3V";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-always-on;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo5_reg: LDO5 {
> + regulator-name = "VTF_2.8V";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
LDO6?
All regulators should be defined in general. Most of the drivers would
anyway register all of them and use driver-specific defaults for the
ones which are missing in DT. I see that max8998 behaves differently
and silently ignores missing regulators leaving them at bootloader
settings. That's also not good because their initial settings might
not be correct for current load and kernel cannot turn them off if
needed. Also we want in general to have full description of HW in DT.
The same applies to LDO10, clocks and ESAFEOUT2 later.
> +
> + ldo7_reg: LDO7 {
> + regulator-name = "VLCD_1.8V";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + /* Till we get panel driver */
> + regulator-always-on;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo8_reg: LDO8 {
> + regulator-name = "VUSB_3.3V";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo9_reg: LDO9 {
> + regulator-name = "VCC_2.8V_PDA";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> + regulator-always-on;
> + };
> +
> + ldo11_reg: LDO11 {
> + regulator-name = "CAM_AF_3.0V";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3000000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo12_reg: LDO12 {
> + regulator-name = "CAM_SENSOR_CORE_1.2V";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo13_reg: LDO13 {
> + regulator-name = "VGA_VDDIO_2.8V";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo14_reg: LDO14 {
> + regulator-name = "VGA_DVDD_1.8V";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo15_reg: LDO15 {
> + regulator-name = "CAM_ISP_HOST_2.8V";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo16_reg: LDO16 {
> + regulator-name = "VGA_AVDD_2.8V";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + ldo17_reg: LDO17 {
> + regulator-name = "VCC_3.0V_LCD";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3000000>;
> + /* Till we get panel driver */
> + regulator-always-on;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + buck1_reg: BUCK1 {
> + regulator-name = "vddarm";
> + regulator-min-microvolt = <750000>;
> + regulator-max-microvolt = <1500000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + regulator-suspend-microvolt = <1250000>;
> + };
> + };
> +
> + buck2_reg: BUCK2 {
> + regulator-name = "vddint";
> + regulator-min-microvolt = <750000>;
> + regulator-max-microvolt = <1500000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + regulator-suspend-microvolt = <1100000>;
> + };
> + };
> +
> + buck3_reg: BUCK3 {
> + regulator-name = "VCC_1.8V";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-always-on;
> + };
> +
> + buck4_reg: BUCK4 {
> + regulator-name = "CAM_ISP_CORE_1.2V";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> +
> + regulator-state-mem {
> + regulator-off-in-suspend;
> + };
> + };
> +
> + safe1_sreg: ESAFEOUT1 {
> + regulator-name = "SAFEOUT1";
> + };
> + };
> + };
> + };
> +
> + i2c_fuel: i2c-fuel {
s/i2c-fuel/ to /i2c-gpio-1/
> + compatible = "i2c-gpio";
> + sda-gpios = <&mp05 1 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
> + scl-gpios = <&mp05 0 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
Spaces around | please.
> + i2c-gpio,delay-us = <2>;
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + fuel@36 {
Name: fuelgauge
> + compatible = "maxim,max17040";
> + interrupt-parent = <&vic0>;
> + interrupts = <7>;
> + reg = <0x36>;
> + };
> + };
> +};
> +
> +&xusbxti {
> + clock-frequency = <24000000>;
> +};
> +
> +&pinctrl0 {
Please order all labels alphabetically. It reduces conflicts later
with multiple changes.
> + wlan_bt_en: wlan-bt-en {
> + samsung,pins = "gpb-5";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
> + samsung,pin-val = <1>;
> + };
> +
> + wlan_gpio_rst: wlan-gpio-rst {
> + samsung,pins = "gpg1-2";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
> + };
> +
> + wifi_host_wake: wifi-host-wake {
> + samsung,pins = "gph2-4";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_DOWN>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
> + };
> +
> + tf_detect: tf-detect {
> + samsung,pins = "gph3-4";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_INPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_DOWN>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
> + };
> +
> + wifi_wake: wifi-wake {
> + samsung,pins = "gph3-5";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
> + };
> +
> + massmemory_en: massmemory-en {
> + samsung,pins = "gpj2-7";
> + samsung,pin-function = <EXYNOS_PIN_FUNC_OUTPUT>;
> + samsung,pin-pud = <S3C64XX_PIN_PULL_NONE>;
> + samsung,pin-drv = <EXYNOS4_PIN_DRV_LV1>;
> + };
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> +
> +&uart1 {
> + status = "okay";
> +};
> +
> +&uart2 {
> + status = "okay";
> +};
> +
> +&sdhci1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + bus-width = <4>;
> + max-frequency = <38400000>;
> + pinctrl-0 = <&sd1_clk &sd1_cmd &sd1_bus4 &wifi_wake &wifi_host_wake &wlan_bt_en>;
> + pinctrl-names = "default";
> + cap-sd-highspeed;
> + cap-mmc-highspeed;
> +
> + mmc-pwrseq = <&wifi_pwrseq>;
> + non-removable;
> + status = "okay";
> +
> + brcmf: bcrmf@1 {
Name of node should describe generic class of the device so maybe
"wlan" or "wlanbt"? Label is okay.
Best regards,
Krzysztof
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