[PATCH 3/4] at91: sam9x60-curiosity: Add proper LED support

[Eugen Hristev]

Hi Alexander,

On 8/9/23 17:16, Alexander Dahl wrote:
> Copied dts pieces from Linux Kernel.  Support is optional for now, to
> make it work the following options have to be enabled: CONFIG_LED,
> CONFIG_LED_GPIO, CONFIG_CMD_LED.
> 
> Signed-off-by: Alexander Dahl <ada at thorsis.com>
> ---
>   .../dts/at91-sam9x60_curiosity-u-boot.dtsi    | 18 +++++++++++
>   arch/arm/dts/at91-sam9x60_curiosity.dts       | 30 +++++++++++++++++++
>   .../sam9x60_curiosity/sam9x60_curiosity.c     | 18 +++++++++++

Can you please split the DT changes from the C file changes, namely if 
you bring changes from Linux, add them in a sync commit indicating the 
commit from Linux, and the changes to the board in a separate patch.

Thanks !

>   3 files changed, 66 insertions(+)
> 
> diff --git a/arch/arm/dts/at91-sam9x60_curiosity-u-boot.dtsi b/arch/arm/dts/at91-sam9x60_curiosity-u-boot.dtsi
> index a1b76e94d1..dd4623311c 100644
> --- a/arch/arm/dts/at91-sam9x60_curiosity-u-boot.dtsi
> +++ b/arch/arm/dts/at91-sam9x60_curiosity-u-boot.dtsi
> @@ -20,6 +20,24 @@
>   	chosen {
>   		bootph-all;
>   	};
> +
> +	config {
> +		u-boot,boot-led = "blue";
> +	};
> +
> +	leds {
> +		led-red {
> +			default-state = "off";
> +		};
> +
> +		led-green {
> +			default-state = "off";
> +		};
> +
> +		led-blue {
> +			default-state = "off";
> +		};
> +	};
>   };
>   
>   &clk32 {
> diff --git a/arch/arm/dts/at91-sam9x60_curiosity.dts b/arch/arm/dts/at91-sam9x60_curiosity.dts
> index 2547b4527c..244cacfe1b 100644
> --- a/arch/arm/dts/at91-sam9x60_curiosity.dts
> +++ b/arch/arm/dts/at91-sam9x60_curiosity.dts
> @@ -33,6 +33,28 @@
>   		};
>   	};
>   
> +	leds {
> +		compatible = "gpio-leds";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_gpio_leds>;
> +
> +		led-red {
> +			label = "red";
> +			gpios = <&pioD 17 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		led-green {
> +			label = "green";
> +			gpios = <&pioD 19 GPIO_ACTIVE_HIGH>;
> +		};
> +
> +		led-blue {
> +			label = "blue";
> +			gpios = <&pioD 21 GPIO_ACTIVE_HIGH>;
> +			linux,default-trigger = "heartbeat";
> +		};
> +	};
> +
>   	onewire_tm: onewire {
>   		gpios = <&pioD 14 GPIO_ACTIVE_HIGH>;
>   		pinctrl-names = "default";
> @@ -167,6 +189,14 @@
>   		};
>   	};
>   
> +	leds {
> +		pinctrl_gpio_leds: gpio-leds {
> +			atmel,pins = <AT91_PIOD 17 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
> +				      AT91_PIOD 19 AT91_PERIPH_GPIO AT91_PINCTRL_NONE
> +				      AT91_PIOD 21 AT91_PERIPH_GPIO AT91_PINCTRL_NONE>;
> +		};
> +	};
> +
>   	nand {
>   		pinctrl_nand_oe_we: nand-oe-we-0 {
>   			atmel,pins =
> diff --git a/board/atmel/sam9x60_curiosity/sam9x60_curiosity.c b/board/atmel/sam9x60_curiosity/sam9x60_curiosity.c
> index 0fe0de9fde..f53d359404 100644
> --- a/board/atmel/sam9x60_curiosity/sam9x60_curiosity.c
> +++ b/board/atmel/sam9x60_curiosity/sam9x60_curiosity.c
> @@ -9,6 +9,7 @@
>   #include <debug_uart.h>
>   #include <fdtdec.h>
>   #include <init.h>
> +#include <led.h>
>   #include <asm/arch/at91_common.h>
>   #include <asm/arch/at91_rstc.h>
>   #include <asm/arch/at91_sfr.h>
> @@ -18,6 +19,7 @@
>   #include <asm/global_data.h>
>   #include <asm/io.h>
>   #include <asm/mach-types.h>
> +#include <dm/ofnode.h>
>   
>   extern void at91_pda_detect(void);
>   
> @@ -27,9 +29,25 @@ void at91_prepare_cpu_var(void);
>   
>   static void board_leds_init(void)
>   {
> +#if CONFIG_IS_ENABLED(LED)
> +	const char *led_name;
> +	struct udevice *dev;
> +	int ret;
> +
> +	led_name = ofnode_conf_read_str("u-boot,boot-led");
> +	if (!led_name)
> +		return;
> +
> +	ret = led_get_by_label(led_name, &dev);
> +	if (ret)
> +		return;
> +
> +	led_set_state(dev, LEDST_ON);
> +#else
>   	at91_set_pio_output(AT91_PIO_PORTD, 17, 0);	/* LED RED */
>   	at91_set_pio_output(AT91_PIO_PORTD, 19, 0);	/* LED GREEN */
>   	at91_set_pio_output(AT91_PIO_PORTD, 21, 1);	/* LED BLUE */
> +#endif
>   }
>   
>   int board_late_init(void)