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rockchip: px30: insert u-boot, spl-boot-device into U-Boot device tree

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It is possible to boot U-Boot proper from a different storage medium
than the one used by the BOOTROM to load the SPL. This information is
stored in the u-boot,spl-boot-device Device Tree property and is
accessible from U-Boot proper so that it has knowledge at runtime where
it was loaded from.

Let's add support for this feature for px30.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
This commit is contained in:
Quentin Schulz 2023-01-09 11:36:43 +01:00 committed by Kever Yang
parent 3898237384
commit 600e0177e7
1 changed files with 51 additions and 0 deletions
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51
arch/arm/mach-rockchip/px30/px30.c
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@ -5,7 +5,9 @@
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <fdt_support.h>
#include <init.h>
#include <spl.h>
#include <asm/armv8/mmu.h>
#include <asm/io.h>
#include <asm/arch-rockchip/bootrom.h>
@ -441,3 +443,52 @@ void board_debug_uart_init(void)
#endif /* CONFIG_DEBUG_UART_BASE && CONFIG_DEBUG_UART_BASE == ... */
}
#endif /* CONFIG_DEBUG_UART_BOARD_INIT */
#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_TPL_BUILD)
const char *spl_decode_boot_device(u32 boot_device)
{
int i;
static const struct {
u32 boot_device;
const char *ofpath;
} spl_boot_devices_tbl[] = {
{ BOOT_DEVICE_MMC2, "/mmc@ff370000" },
{ BOOT_DEVICE_MMC1, "/mmc@ff390000" },
};
for (i = 0; i < ARRAY_SIZE(spl_boot_devices_tbl); ++i)
if (spl_boot_devices_tbl[i].boot_device == boot_device)
return spl_boot_devices_tbl[i].ofpath;
return NULL;
}
void spl_perform_fixups(struct spl_image_info *spl_image)
{
void *blob = spl_image->fdt_addr;
const char *boot_ofpath;
int chosen;
/*
* Inject the ofpath of the device the full U-Boot (or Linux in
* Falcon-mode) was booted from into the FDT, if a FDT has been
* loaded at the same time.
*/
if (!blob)
return;
boot_ofpath = spl_decode_boot_device(spl_image->boot_device);
if (!boot_ofpath) {
pr_err("%s: could not map boot_device to ofpath\n", __func__);
return;
}
chosen = fdt_find_or_add_subnode(blob, 0, "chosen");
if (chosen < 0) {
pr_err("%s: could not find/create '/chosen'\n", __func__);
return;
}
fdt_setprop_string(blob, chosen,
"u-boot,spl-boot-device", boot_ofpath);
}
#endif