diff mbox series

[7/7] arm64: dts: exynos: Add initial E850-96 board support

Message ID 20211215160906.17451-8-semen.protsenko@linaro.org
State New
Headers show
Series arm64: dts: exynos: Add E850-96 board support | expand

Commit Message

Sam Protsenko Dec. 15, 2021, 4:09 p.m. UTC 
E850-96 is a 96boards development board manufactured by WinLink. It
incorporates Samsung Exynos850 SoC, and is compatible with 96boards
mezzanine boards [1], as it follows 96boards standards.

This patch adds minimal support for E850-96 board. Next features are
enabled in board dts file and verified with minimal BusyBox rootfs:

 * User buttons
 * LEDs
 * Serial console
 * Watchdog timers
 * RTC
 * eMMC

[1] https://www.96boards.org/products/mezzanine/

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 arch/arm64/boot/dts/exynos/Makefile           |   3 +-
 .../boot/dts/exynos/exynos850-e850-96.dts     | 157 ++++++++++++++++++
 2 files changed, 159 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts

Comments

Krzysztof Kozlowski Dec. 15, 2021, 5:04 p.m. UTC | #1 
On 15/12/2021 17:09, Sam Protsenko wrote:
> E850-96 is a 96boards development board manufactured by WinLink. It
> incorporates Samsung Exynos850 SoC, and is compatible with 96boards
> mezzanine boards [1], as it follows 96boards standards.
> 
> This patch adds minimal support for E850-96 board. Next features are
> enabled in board dts file and verified with minimal BusyBox rootfs:
> 
>  * User buttons
>  * LEDs
>  * Serial console
>  * Watchdog timers
>  * RTC
>  * eMMC
> 
> [1] https://www.96boards.org/products/mezzanine/
> 
> Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
> ---
>  arch/arm64/boot/dts/exynos/Makefile           |   3 +-
>  .../boot/dts/exynos/exynos850-e850-96.dts     | 157 ++++++++++++++++++
>  2 files changed, 159 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> 
> diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
> index b41e86df0a84..803548ccc537 100644
> --- a/arch/arm64/boot/dts/exynos/Makefile
> +++ b/arch/arm64/boot/dts/exynos/Makefile
> @@ -3,4 +3,5 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
>  	exynos5433-tm2.dtb	\
>  	exynos5433-tm2e.dtb	\
>  	exynos7-espresso.dtb	\
> -	exynosautov9-sadk.dtb
> +	exynosautov9-sadk.dtb	\
> +	exynos850-e850-96.dtb
> diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> new file mode 100644
> index 000000000000..fd611906d81c
> --- /dev/null
> +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> @@ -0,0 +1,157 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * WinLink E850-96 board device tree source
> + *
> + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
> + * Copyright (C) 2021 Linaro Ltd.
> + *
> + * Device tree source file for WinLink's E850-96 board which is based on
> + * Samsung Exynos850 SoC.
> + */
> +
> +/dts-v1/;
> +
> +#include "exynos850.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +
> +#define BOARD_ID	0x0
> +#define BOARD_REV	0x2
> +
> +/ {
> +	model = "WinLink E850-96 board";
> +	compatible = "winlink,e850-96", "samsung,exynos850";
> +	board_id = <BOARD_ID>;
> +	board_rev = <BOARD_REV>;
> +
> +	chosen {
> +		stdout-path = &serial_0;
> +	};
> +

You did not define memory node. Do you expect bootloader to fill it?
Does it change between different boards?


Best regards,
Krzysztof
Sam Protsenko Dec. 16, 2021, 11:39 p.m. UTC | #2 
On Wed, 15 Dec 2021 at 19:01, Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
>
> On 15/12/2021 17:09, Sam Protsenko wrote:
> > E850-96 is a 96boards development board manufactured by WinLink. It
> > incorporates Samsung Exynos850 SoC, and is compatible with 96boards
> > mezzanine boards [1], as it follows 96boards standards.
> >
> > This patch adds minimal support for E850-96 board. Next features are
> > enabled in board dts file and verified with minimal BusyBox rootfs:
> >
> >  * User buttons
> >  * LEDs
> >  * Serial console
> >  * Watchdog timers
> >  * RTC
> >  * eMMC
> >
> > [1] https://www.96boards.org/products/mezzanine/
> >
> > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
> > ---
> >  arch/arm64/boot/dts/exynos/Makefile           |   3 +-
> >  .../boot/dts/exynos/exynos850-e850-96.dts     | 157 ++++++++++++++++++
> >  2 files changed, 159 insertions(+), 1 deletion(-)
> >  create mode 100644 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> >
> > diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
> > index b41e86df0a84..803548ccc537 100644
> > --- a/arch/arm64/boot/dts/exynos/Makefile
> > +++ b/arch/arm64/boot/dts/exynos/Makefile
> > @@ -3,4 +3,5 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
> >       exynos5433-tm2.dtb      \
> >       exynos5433-tm2e.dtb     \
> >       exynos7-espresso.dtb    \
> > -     exynosautov9-sadk.dtb
> > +     exynosautov9-sadk.dtb   \
> > +     exynos850-e850-96.dtb
>
> Alphabetical order please, so before autov9.
>
> > diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> > new file mode 100644
> > index 000000000000..fd611906d81c
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> > @@ -0,0 +1,157 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * WinLink E850-96 board device tree source
> > + *
> > + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
> > + * Copyright (C) 2021 Linaro Ltd.
> > + *
> > + * Device tree source file for WinLink's E850-96 board which is based on
> > + * Samsung Exynos850 SoC.
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "exynos850.dtsi"
> > +#include <dt-bindings/gpio/gpio.h>
> > +#include <dt-bindings/input/input.h>
> > +
> > +#define BOARD_ID     0x0
> > +#define BOARD_REV    0x2
>
> No need for define for single-used constant.
>
> > +
> > +/ {
> > +     model = "WinLink E850-96 board";
> > +     compatible = "winlink,e850-96", "samsung,exynos850";
> > +     board_id = <BOARD_ID>;
> > +     board_rev = <BOARD_REV>;
>
> Unknown properties. They need dtschema.
>

Those are not really needed in case of upstream linux (only one board
revision is added and no dtbo to merge in bootloader). Will remove
those in v2.

> > +
> > +     chosen {
> > +             stdout-path = &serial_0;
> > +     };
> > +
> > +     gpio-keys {
> > +             compatible = "gpio-keys";
> > +             pinctrl-names = "default";
> > +             pinctrl-0 = <&key_voldown_pins &key_volup_pins>;
> > +
> > +             volume-down-key {
> > +                     label = "Volume Down";
> > +                     linux,code = <KEY_VOLUMEDOWN>;
> > +                     gpios = <&gpa1 0 GPIO_ACTIVE_LOW>;
> > +             };
> > +
> > +             volume-up-key {
> > +                     label = "Volume Up";
> > +                     linux,code = <KEY_VOLUMEUP>;
> > +                     gpios = <&gpa0 7 GPIO_ACTIVE_LOW>;
> > +             };
> > +     };
> > +
> > +     leds {
> > +             compatible = "gpio-leds";
> > +
> > +             /* HEART_BEAT_LED */
> > +             user_led1: led-1 {
> > +                     label = "yellow:user1";
>
> Add where applicable:
> 1. function, e.g. LED_FUNCTION_HEARTBEAT, LED_FUNCTION_WLAN, etc,
> 2. color constants.
>

I actually had those defined initially :) But then specifically
decided to remove those, as those are not very helpful when "label"
and "linux,default-trigger" are already defined (and not many other
boards seem to provide it). But ok, I'll pull those back in v2.

> > +                     gpios = <&gpg2 2 GPIO_ACTIVE_HIGH>;
> > +                     linux,default-trigger = "heartbeat";
> > +             };
> > +
> > +             /* eMMC_LED */
> > +             user_led2: led-2 {
> > +                     label = "yellow:user2";
> > +                     gpios = <&gpg2 3 GPIO_ACTIVE_HIGH>;
> > +                     linux,default-trigger = "mmc0";
> > +             };
> > +
> > +             /* SD_LED */
> > +             user_led3: led-3 {
> > +                     label = "white:user3";
> > +                     gpios = <&gpg2 4 GPIO_ACTIVE_HIGH>;
> > +                     linux,default-trigger = "mmc2";
> > +             };
> > +
> > +             /* WIFI_LED */
> > +             wlan_active_led: led-4 {
> > +                     label = "yellow:wlan";
> > +                     gpios = <&gpg2 6 GPIO_ACTIVE_HIGH>;
> > +                     linux,default-trigger = "phy0tx";
> > +                     default-state = "off";
> > +             };
> > +
> > +             /* BLUETOOTH_LED */
> > +             bt_active_led: led-5 {
> > +                     label = "blue:bt";
> > +                     gpios = <&gpg2 7 GPIO_ACTIVE_HIGH>;
> > +                     linux,default-trigger = "hci0rx";
> > +                     default-state = "off";
> > +             };
> > +     };
> > +};
> > +
> > +&oscclk {> + clock-frequency = <26000000>;
> > +};
> > +
> > +&rtcclk {
> > +     clock-frequency = <32768>;
> > +};
> > +
> > +&usi_uart {
> > +     samsung,clkreq-on; /* needed for UART mode */
> > +     status = "okay";
> > +};
> > +
> > +&serial_0 {
>
> Order all phandle overrides by phandle name, so:
> &oscclk
> &rtcclk
> &serial_0
> &usi_uart
> ...
>
> > +     status = "okay";
> > +     pinctrl-names = "default";
> > +     pinctrl-0 = <&uart1_pins>;
> > +};
> > +
> > +&watchdog_cl0 {
> > +     status = "okay";
> > +};
> > +
> > +&watchdog_cl1 {
> > +     status = "okay";
> > +};
> > +
> > +&rtc {
> > +     status = "okay";
> > +};
> > +
> > +&mmc_0 {
> > +     status = "okay";
> > +     mmc-hs200-1_8v;
> > +     mmc-hs400-1_8v;
> > +     cap-mmc-highspeed;
> > +     non-removable;
> > +     broken-cd;
>
> Is it correct to have non-removable (typical for eMMC) and broken CD?
>

Nice catch, not sure how I missed that. It's just ignored in dw_mmc
driver in case of "non-removable", but that property just doesn't make
any sense here.

This and all above comments will be addressed in v2.

> > +     mmc-hs400-enhanced-strobe;
> > +     card-detect-delay = <200>;
> > +     clock-frequency = <800000000>;
> > +     bus-width = <8>;
> > +     samsung,dw-mshc-ciu-div = <3>;
> > +     samsung,dw-mshc-sdr-timing = <0 4>;
> > +     samsung,dw-mshc-ddr-timing = <2 4>;
> > +     samsung,dw-mshc-hs400-timing = <0 2>;
> > +
> > +     pinctrl-names = "default";
> > +     pinctrl-0 = <&sd0_clk_pins &sd0_cmd_pins &sd0_rdqs_pins &sd0_nreset_pins
> > +                  &sd0_bus1_pins &sd0_bus4_pins &sd0_bus8_pins>;
> > +};
> > +
>
>
> Best regards,
> Krzysztof
Sam Protsenko Dec. 17, 2021, 12:49 a.m. UTC | #3 
On Wed, 15 Dec 2021 at 19:04, Krzysztof Kozlowski
<krzysztof.kozlowski@canonical.com> wrote:
>
> On 15/12/2021 17:09, Sam Protsenko wrote:
> > E850-96 is a 96boards development board manufactured by WinLink. It
> > incorporates Samsung Exynos850 SoC, and is compatible with 96boards
> > mezzanine boards [1], as it follows 96boards standards.
> >
> > This patch adds minimal support for E850-96 board. Next features are
> > enabled in board dts file and verified with minimal BusyBox rootfs:
> >
> >  * User buttons
> >  * LEDs
> >  * Serial console
> >  * Watchdog timers
> >  * RTC
> >  * eMMC
> >
> > [1] https://www.96boards.org/products/mezzanine/
> >
> > Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
> > ---
> >  arch/arm64/boot/dts/exynos/Makefile           |   3 +-
> >  .../boot/dts/exynos/exynos850-e850-96.dts     | 157 ++++++++++++++++++
> >  2 files changed, 159 insertions(+), 1 deletion(-)
> >  create mode 100644 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> >
> > diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
> > index b41e86df0a84..803548ccc537 100644
> > --- a/arch/arm64/boot/dts/exynos/Makefile
> > +++ b/arch/arm64/boot/dts/exynos/Makefile
> > @@ -3,4 +3,5 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
> >       exynos5433-tm2.dtb      \
> >       exynos5433-tm2e.dtb     \
> >       exynos7-espresso.dtb    \
> > -     exynosautov9-sadk.dtb
> > +     exynosautov9-sadk.dtb   \
> > +     exynos850-e850-96.dtb
> > diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> > new file mode 100644
> > index 000000000000..fd611906d81c
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
> > @@ -0,0 +1,157 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * WinLink E850-96 board device tree source
> > + *
> > + * Copyright (C) 2018 Samsung Electronics Co., Ltd.
> > + * Copyright (C) 2021 Linaro Ltd.
> > + *
> > + * Device tree source file for WinLink's E850-96 board which is based on
> > + * Samsung Exynos850 SoC.
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "exynos850.dtsi"
> > +#include <dt-bindings/gpio/gpio.h>
> > +#include <dt-bindings/input/input.h>
> > +
> > +#define BOARD_ID     0x0
> > +#define BOARD_REV    0x2
> > +
> > +/ {
> > +     model = "WinLink E850-96 board";
> > +     compatible = "winlink,e850-96", "samsung,exynos850";
> > +     board_id = <BOARD_ID>;
> > +     board_rev = <BOARD_REV>;
> > +
> > +     chosen {
> > +             stdout-path = &serial_0;
> > +     };
> > +
>
> You did not define memory node. Do you expect bootloader to fill it?
> Does it change between different boards?
>

Yeah, bootloader fills it. But now I can see it's probably better to
specify it explicitly specify it in dts. Will do in v2.

>
> Best regards,
> Krzysztof
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
index b41e86df0a84..803548ccc537 100644
--- a/arch/arm64/boot/dts/exynos/Makefile
+++ b/arch/arm64/boot/dts/exynos/Makefile
@@ -3,4 +3,5 @@  dtb-$(CONFIG_ARCH_EXYNOS) += \
 	exynos5433-tm2.dtb	\
 	exynos5433-tm2e.dtb	\
 	exynos7-espresso.dtb	\
-	exynosautov9-sadk.dtb
+	exynosautov9-sadk.dtb	\
+	exynos850-e850-96.dtb
diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
new file mode 100644
index 000000000000..fd611906d81c
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
@@ -0,0 +1,157 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * WinLink E850-96 board device tree source
+ *
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ * Copyright (C) 2021 Linaro Ltd.
+ *
+ * Device tree source file for WinLink's E850-96 board which is based on
+ * Samsung Exynos850 SoC.
+ */
+
+/dts-v1/;
+
+#include "exynos850.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#define BOARD_ID	0x0
+#define BOARD_REV	0x2
+
+/ {
+	model = "WinLink E850-96 board";
+	compatible = "winlink,e850-96", "samsung,exynos850";
+	board_id = <BOARD_ID>;
+	board_rev = <BOARD_REV>;
+
+	chosen {
+		stdout-path = &serial_0;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&key_voldown_pins &key_volup_pins>;
+
+		volume-down-key {
+			label = "Volume Down";
+			linux,code = <KEY_VOLUMEDOWN>;
+			gpios = <&gpa1 0 GPIO_ACTIVE_LOW>;
+		};
+
+		volume-up-key {
+			label = "Volume Up";
+			linux,code = <KEY_VOLUMEUP>;
+			gpios = <&gpa0 7 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		/* HEART_BEAT_LED */
+		user_led1: led-1 {
+			label = "yellow:user1";
+			gpios = <&gpg2 2 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		/* eMMC_LED */
+		user_led2: led-2 {
+			label = "yellow:user2";
+			gpios = <&gpg2 3 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "mmc0";
+		};
+
+		/* SD_LED */
+		user_led3: led-3 {
+			label = "white:user3";
+			gpios = <&gpg2 4 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "mmc2";
+		};
+
+		/* WIFI_LED */
+		wlan_active_led: led-4 {
+			label = "yellow:wlan";
+			gpios = <&gpg2 6 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "phy0tx";
+			default-state = "off";
+		};
+
+		/* BLUETOOTH_LED */
+		bt_active_led: led-5 {
+			label = "blue:bt";
+			gpios = <&gpg2 7 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "hci0rx";
+			default-state = "off";
+		};
+	};
+};
+
+&oscclk {
+	clock-frequency = <26000000>;
+};
+
+&rtcclk {
+	clock-frequency = <32768>;
+};
+
+&usi_uart {
+	samsung,clkreq-on; /* needed for UART mode */
+	status = "okay";
+};
+
+&serial_0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart1_pins>;
+};
+
+&watchdog_cl0 {
+	status = "okay";
+};
+
+&watchdog_cl1 {
+	status = "okay";
+};
+
+&rtc {
+	status = "okay";
+};
+
+&mmc_0 {
+	status = "okay";
+	mmc-hs200-1_8v;
+	mmc-hs400-1_8v;
+	cap-mmc-highspeed;
+	non-removable;
+	broken-cd;
+	mmc-hs400-enhanced-strobe;
+	card-detect-delay = <200>;
+	clock-frequency = <800000000>;
+	bus-width = <8>;
+	samsung,dw-mshc-ciu-div = <3>;
+	samsung,dw-mshc-sdr-timing = <0 4>;
+	samsung,dw-mshc-ddr-timing = <2 4>;
+	samsung,dw-mshc-hs400-timing = <0 2>;
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&sd0_clk_pins &sd0_cmd_pins &sd0_rdqs_pins &sd0_nreset_pins
+		     &sd0_bus1_pins &sd0_bus4_pins &sd0_bus8_pins>;
+};
+
+&pinctrl_alive {
+	key_voldown_pins: key-voldown-pins {
+		samsung,pins = "gpa1-0";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+
+	key_volup_pins: key-volup-pins {
+		samsung,pins = "gpa0-7";
+		samsung,pin-function = <EXYNOS_PIN_FUNC_EINT>;
+		samsung,pin-pud = <EXYNOS_PIN_PULL_NONE>;
+		samsung,pin-drv = <EXYNOS5420_PIN_DRV_LV1>;
+	};
+};