Insert /u-boot,spl-applied-dto-<dto-name> = <index> property into the U-Boot control DT during SPL DTO application process. This can be used by user to inspect which DTOs got applied by the SPL and in which order from running U-Boot.
Example: ``` u-boot=> fdt addr $fdtcontroladdr && fdt list / Working FDT set to aee9aeb0 / { u-boot,spl-applied-dto-fdt-dto-imx8mp-dhcom-pdk3-overlay-rev100 = <0x00000005>; u-boot,spl-applied-dto-fdt-dto-imx8mp-dhcom-som-overlay-rev100 = <0x00000004>; u-boot,spl-applied-dto-fdt-dto-imx8mp-dhcom-pdk-overlay-eth2xfast = <0x00000003>; u-boot,spl-applied-dto-fdt-dto-imx8mp-dhcom-som-overlay-eth2xfast = <0x00000002>; ... ```
Signed-off-by: Marek Vasut marex@denx.de --- Cc: Manoj Sai abbaraju.manojsai@amarulasolutions.com Cc: Sean Anderson seanga2@gmail.com Cc: Simon Glass sjg@chromium.org Cc: Suniel Mahesh sunil@amarulasolutions.com Cc: Tom Rini trini@konsulko.com Cc: u-boot@dh-electronics.com Cc: u-boot@lists.denx.de --- V2: - Expand the DT by one more byte to cater for trailing NUL byte - Update comment related to the expansion of DT - Flip the !ret conditional, which was incorrect and missed - Expand prefix to u-boot,spl-applied-dto- - Document the binding --- common/spl/spl_fit.c | 29 +++++++++++++++++++++++++++-- doc/device-tree-bindings/config.txt | 11 +++++++++++ 2 files changed, 38 insertions(+), 2 deletions(-)
diff --git a/common/spl/spl_fit.c b/common/spl/spl_fit.c index 988125be008..0a6b5ea8212 100644 --- a/common/spl/spl_fit.c +++ b/common/spl/spl_fit.c @@ -363,6 +363,7 @@ static int spl_fit_append_fdt(struct spl_image_info *spl_image, { struct spl_image_info image_info; int node, ret = 0, index = 0; + char dtoname[256];
/* * Use the address following the image as target address for the @@ -448,9 +449,13 @@ static int spl_fit_append_fdt(struct spl_image_info *spl_image, if (ret < 0) break;
- /* Make room in FDT for changes from the overlay */ + /* + * Make room in FDT for changes from the overlay, + * the overlay name and the trailing NUL byte in + * that name. + */ ret = fdt_increase_size(spl_image->fdt_addr, - image_info.size); + image_info.size + strlen(str) + 1); if (ret < 0) break;
@@ -464,6 +469,26 @@ static int spl_fit_append_fdt(struct spl_image_info *spl_image,
debug("%s: DT overlay %s applied\n", __func__, fit_get_name(ctx->fit, node, NULL)); + + /* + * Insert /u-boot,<dto-name> = <index> property into + * the U-Boot control DT. This can be used by user + * to inspect which DTOs got applied by the SPL from + * a running U-Boot. + */ + snprintf(dtoname, sizeof(dtoname), "u-boot,spl-applied-dto-%s", str); + ret = fdt_setprop_u32(spl_image->fdt_addr, 0, dtoname, + index); + if (ret) { + /* + * The DTO itself was applied, do not treat the + * insertion of /u-boot,<dto-name> as an error + * so the system can possibly boot somehow. + */ + debug("%s: DT overlay %s name not inserted into / node (%d)\n", + __func__, + fit_get_name(ctx->fit, node, NULL), ret); + } } free(tmpbuffer); if (ret) diff --git a/doc/device-tree-bindings/config.txt b/doc/device-tree-bindings/config.txt index f50c68bbdc3..7aa6d9a72c6 100644 --- a/doc/device-tree-bindings/config.txt +++ b/doc/device-tree-bindings/config.txt @@ -95,6 +95,17 @@ rootdisk-offset (int) silent-console (int) If present and non-zero, the console is silenced by default on boot.
+u-boot,spl-applied-dto-* (int) + Emitted by SPL into U-Boot control DT root node in case a DTO from + fitImage was applied on top of U-Boot control DT by the SPL fitImage + loader. The single integer cell indicates in which order was the DTO + applied by the SPL and matches the index of the DTO in the fitImage. + DTOs in fitImage may be skipped using board_spl_fit_append_fdt_skip(), + therefore the integers might not be monotonically incrementing, there + may be gaps. This property can be used to determine which DTOs were + applied by the SPL from running U-Boot by inspecting the U-Boot + control DT. + u-boot,spl-payload-offset (int) If present (and SPL is controlled by the device-tree), this allows to override the CONFIG_SYS_SPI_U_BOOT_OFFS setting using a value