Add support for registering disabled boot devices from oftree.
Creating a device tree with all bootable devices disabled, makes
it possible to only enable and register the devices needed to
load the next stage bootloader.
Signed-off-by: Teresa Gámez <t.gamez@xxxxxxxxx>
---
arch/arm/mach-omap/am33xx_generic.c | 31 ++++++++++++++++++++++++
arch/arm/mach-omap/include/mach/am33xx-generic.h | 1 +
2 files changed, 32 insertions(+)
diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index f293134..a04e8c7 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -428,3 +428,34 @@ void am335x_sdram_init(int ioctrl, const struct am33xx_cmd_control *cmd_ctrl,
am33xx_config_sdram(emif_regs);
}
+
+int am33xx_of_register_bootdevice(void)
+{
+ struct device_d *dev;
+
+ switch (bootsource_get()) {
+ case BOOTSOURCE_MMC:
+ if (bootsource_get_instance() == 0)
+ dev = of_register_disabled_device_by_name("mmc@48060000");
+ else
+ dev = of_register_disabled_device_by_name("mmc@481d8000");
+ break;
+ case BOOTSOURCE_NAND:
+ dev = of_register_disabled_device_by_name("gpmc@50000000");
+ break;
+ case BOOTSOURCE_SPI:
+ dev = of_register_disabled_device_by_name("spi@48030000");
+ break;
+ default:
+ /* Use nand fallback */
+ dev = of_register_disabled_device_by_name("gpmc@50000000");
+ break;
+ }
+
+ if (!dev) {
+ printf("Unable to register boot device\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
diff --git a/arch/arm/mach-omap/include/mach/am33xx-generic.h b/arch/arm/mach-omap/include/mach/am33xx-generic.h
index 6c85d51..7312061 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-generic.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-generic.h
@@ -33,5 +33,6 @@ void __noreturn am33xx_reset_cpu(unsigned long addr);
void am33xx_enable_per_clocks(void);
int am33xx_init(void);
int am33xx_devices_init(void);
+int am33xx_of_register_bootdevice(void);
#endif /* __MACH_AM33XX_GENERIC_H */
--
1.9.1
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