[PATCH 2/6] raspberry-pi: add leds support

[Antony Pavlov]

On Tue, 13 Jan 2015 16:15:45 +0800
Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> wrote:

> 
> > On Jan 13, 2015, at 3:58 PM, Antony Pavlov <antonynpavlov at gmail.com> wrote:
> > 
> > On Tue, 13 Jan 2015 07:26:12 +0100
> > Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com> wrote:
> > 
> > I have planned to switch raspberry pi to device tree support as Linux does.
> 
> but as I do not want to build multi binary switch (leds & co) those to DT make no sense except if we can
> chose the DT at runtime
> 
> > 
> > IMHO POWER LED is not GPIO controlable, please see these schematics
> 
> yes it is does, I have a B+ and it’s controllable

I'll check your series on my B+ in a few days.


> >   http://www.raspberrypi.org/wp-content/uploads/2012/04/Raspberry-Pi-Schematics-R1.0.pdf
> >   http://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/Raspberry-Pi-B-Plus-V1.2-Schematics.pdf
> > 
> > 
> >> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
> >> ---
> >> arch/arm/boards/raspberry-pi/rpi.c | 55 ++++++++++++++++++++++++++++++++++++++
> >> 1 file changed, 55 insertions(+)
> >> 
> >> diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c
> >> index ae1e92a..7d866cc 100644
> >> --- a/arch/arm/boards/raspberry-pi/rpi.c
> >> +++ b/arch/arm/boards/raspberry-pi/rpi.c
> >> @@ -21,6 +21,8 @@
> >> #include <linux/clkdev.h>
> >> #include <envfs.h>
> >> #include <malloc.h>
> >> +#include <gpio.h>
> >> +#include <led.h>
> >> #include <asm/armlinux.h>
> >> #include <generated/mach-types.h>
> >> 
> >> @@ -87,6 +89,49 @@ static int rpi_register_clkdev(u32 clock_id, const char *name)
> >> }
> >> 
> >> 
> >> +static struct gpio_led leds[] = {
> >> +	{
> >> +		.gpio	= -EINVAL,
> >> +		.led	= {
> >> +			.name = "ACT",
> >> +		},
> >> +	}, {
> >> +		.gpio	= -EINVAL,
> >> +		.led	= {
> >> +			.name = "PWR",
> >> +		},
> >> +	},
> >> +};
> >> +
> >> +static void rpi_add_led(void)
> >> +{
> >> +	int i;
> >> +	struct gpio_led *l;
> >> +
> >> +	for (i = 0; i < ARRAY_SIZE(leds); i++) {
> >> +		l = &leds[i];
> >> +
> >> +		if (gpio_is_valid(l->gpio))
> >> +			led_gpio_register(l);
> >> +	}
> >> +
> >> +	l = &leds[0];
> >> +	if (gpio_is_valid(l->gpio))
> >> +		led_set_trigger(LED_TRIGGER_HEARTBEAT, &l->led);
> >> +}
> >> +
> >> +static void rpi_b_plus_init(void)
> >> +{
> >> +	leds[0].gpio = 47;
> >> +	leds[1].gpio = 35;
> >> +}
> >> +
> >> +static void rpi_b_init(void)
> >> +{
> >> +	leds[0].gpio = 16;
> >> +	leds[0].active_low = 1;
> >> +}
> >> +
> >> #define RPI_MODEL(_id, _name, _init)	\
> >> 	[_id] = {				\
> >> 		.name			= _name,\
> >> @@ -160,6 +205,15 @@ unknown_rev:
> >> 	barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
> >> }
> >> 
> >> +static void rpi_model_init(void)
> >> +{
> >> +	rpi_set_usbethaddr();
> >> +	if (models[rpi_board_rev].init) {
> >> +		models[rpi_board_rev].init();
> >> +		rpi_add_led();
> >> +	}
> >> +}
> >> +
> >> static int rpi_mem_init(void)
> >> {
> >> 	u32 size = 0;
> >> @@ -220,6 +274,7 @@ static int rpi_env_init(void)
> >> 
> >> static int rpi_devices_init(void)
> >> {
> >> +	rpi_model_init();
> >> 	bcm2835_register_mci();
> >> 	bcm2835_register_fb();
> >> 	armlinux_set_architecture(MACH_TYPE_BCM2708);
> >> -- 
> >> 2.1.3
> >> 
> >> 
> >> _______________________________________________
> >> barebox mailing list
> >> barebox at lists.infradead.org
> >> http://lists.infradead.org/mailman/listinfo/barebox
> > 
> > 
> > -- 
> > -- 
> > Best regards,
> >   Antony Pavlov
> 


-- 
-- 
Best regards,
  Antony Pavlov