WIP: rpi zero supportrhi/rpi-zero

Signed-off-by: Roland Hieber <rhi@pengutronix.de>

5 files changed, 30 insertions, 1 deletions

diff --git a/arch/arm/boards/raspberry-pi/lowlevel.c b/arch/arm/boards/raspberry-pi/lowlevel.c
index 34c935092..da92c8297 100644
--- a/arch/arm/boards/raspberry-pi/lowlevel.c
+++ b/arch/arm/boards/raspberry-pi/lowlevel.c
@@ -4,6 +4,16 @@
 #include <linux/sizes.h>
 #include <mach/platform.h>
 
+extern char __dtb_bcm2835_rpi_zero_start[];
+ENTRY_FUNCTION(start_raspberry_pi_zero, r0, r1, r2)
+{
+	void *fdt = __dtb_bcm2835_rpi_zero_start + get_runtime_offset();
+
+	arm_cpu_lowlevel_init();
+
+	barebox_arm_entry(BCM2835_SDRAM_BASE, SZ_128M, fdt);
+}
+
 extern char __dtb_bcm2835_rpi_start[];
 ENTRY_FUNCTION(start_raspberry_pi1, r0, r1, r2)
 {
diff --git a/arch/arm/boards/raspberry-pi/rpi-common.c b/arch/arm/boards/raspberry-pi/rpi-common.c
index 44d3ef79d..c98b3e2e3 100644
--- a/arch/arm/boards/raspberry-pi/rpi-common.c
+++ b/arch/arm/boards/raspberry-pi/rpi-common.c
@@ -300,6 +300,7 @@ postconsole_initcall(rpi_clock_init);
 
 #define BCM2835_PL011_BASE 0x20201000
 #define BCM2836_PL011_BASE 0x3f201000
+#define BCM2835_MINIUART_BASE 0x20215040
 #define BCM2836_MINIUART_BASE 0x3f215040
 
 static int rpi_console_clock_init(void)
@@ -319,6 +320,7 @@ static int rpi_console_clock_init(void)
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);
 
+	clkdev_add_physbase(clk, BCM2835_MINIUART_BASE, NULL);
 	clkdev_add_physbase(clk, BCM2836_MINIUART_BASE, NULL);
 
 	clk = clk_fixed("bcm2835-cs", 1 * 1000 * 1000);
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index c08b35a10..777cd323f 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -72,6 +72,7 @@ pbl-dtb-$(CONFIG_MACH_RADXA_ROCK) += rk3188-radxarock.dtb.o
 pbl-dtb-$(CONFIG_MACH_PHYTEC_SOM_RK3288) += rk3288-phycore-som.dtb.o
 pbl-dtb-$(CONFIG_MACH_REALQ7) += imx6q-dmo-edmqmx6.dtb.o
 pbl-dtb-$(CONFIG_MACH_RPI) += bcm2835-rpi.dtb.o
+pbl-dtb-$(CONFIG_MACH_RPI) += bcm2835-rpi-zero.dtb.o
 pbl-dtb-$(CONFIG_MACH_RPI2) += bcm2836-rpi-2.dtb.o
 pbl-dtb-$(CONFIG_MACH_RPI3) += bcm2837-rpi-3.dtb.o
 pbl-dtb-$(CONFIG_MACH_SABRELITE) += imx6q-sabrelite.dtb.o imx6dl-sabrelite.dtb.o
diff --git a/arch/arm/dts/bcm2835-rpi-zero.dts b/arch/arm/dts/bcm2835-rpi-zero.dts
new file mode 100644
index 000000000..ca8494064
--- /dev/null
+++ b/arch/arm/dts/bcm2835-rpi-zero.dts
@@ -0,0 +1,12 @@
+#include <arm/bcm2835-rpi-zero.dts>
+
+/ {
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	memory {
+		reg = <0x0 0x0>;
+	};
+};
+
diff --git a/images/Makefile.bcm283x b/images/Makefile.bcm283x
index 9199f153d..156ebe92e 100644
--- a/images/Makefile.bcm283x
+++ b/images/Makefile.bcm283x
@@ -2,6 +2,10 @@
 # barebox image generation Makefile for BCM283x images
 #
 
+pblb-$(CONFIG_MACH_RPI) += start_raspberry_pi_zero
+FILE_barebox-raspberry-pi-zero.img = start_raspberry_pi_zero.pblb
+image-$(CONFIG_MACH_RPI) += barebox-raspberry-pi-zero.img
+
 pblb-$(CONFIG_MACH_RPI) += start_raspberry_pi1
 FILE_barebox-raspberry-pi-1.img = start_raspberry_pi1.pblb
 image-$(CONFIG_MACH_RPI) += barebox-raspberry-pi-1.img
@@ -12,4 +16,4 @@ image-$(CONFIG_MACH_RPI2) += barebox-raspberry-pi-2.img
 
 pblb-$(CONFIG_MACH_RPI3) += start_raspberry_pi3
 FILE_barebox-raspberry-pi-3.img = start_raspberry_pi3.pblb
-image-$(CONFIG_MACH_RPI3) += barebox-raspberry-pi-3.img
\ No newline at end of file
+image-$(CONFIG_MACH_RPI3) += barebox-raspberry-pi-3.img