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GET /api/1.2/patches/2222628/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 2222628,
    "url": "http://patchwork.ozlabs.org/api/1.2/patches/2222628/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/20260413081322.2226374-1-ravi@prevas.dk/",
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        "name": "U-Boot",
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        "commit_url_format": ""
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    "date": "2026-04-13T08:13:22",
    "name": "cmd: mmc: allow 'mmc rst-function' to show the current value",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "38123101a2b2537d891df3782956e7eeeddbb84e",
    "submitter": {
        "id": 89443,
        "url": "http://patchwork.ozlabs.org/api/1.2/people/89443/?format=api",
        "name": "Rasmus Villemoes",
        "email": "ravi@prevas.dk"
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    "delegate": {
        "id": 12423,
        "url": "http://patchwork.ozlabs.org/api/1.2/users/12423/?format=api",
        "username": "Jaehoon",
        "first_name": "Jaehoon",
        "last_name": "Chung",
        "email": "jh80.chung@samsung.com"
    },
    "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/20260413081322.2226374-1-ravi@prevas.dk/mbox/",
    "series": [
        {
            "id": 499661,
            "url": "http://patchwork.ozlabs.org/api/1.2/series/499661/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=499661",
            "date": "2026-04-13T08:13:22",
            "name": "cmd: mmc: allow 'mmc rst-function' to show the current value",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/499661/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2222628/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2222628/checks/",
    "tags": {},
    "related": [],
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        "From": "Rasmus Villemoes <ravi@prevas.dk>",
        "To": "u-boot@lists.denx.de",
        "Cc": "Peng Fan <peng.fan@nxp.com>, Tom Rini <trini@konsulko.com>,\n Jaehoon Chung <jh80.chung@samsung.com>, Rasmus Villemoes <ravi@prevas.dk>",
        "Subject": "[PATCH] cmd: mmc: allow 'mmc rst-function' to show the current value",
        "Date": "Mon, 13 Apr 2026 10:13:22 +0200",
        "Message-ID": "<20260413081322.2226374-1-ravi@prevas.dk>",
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    },
    "content": "Extend the 'mmc rst-function' subcommand so that lacking a value to\nset, it simply prints the current value, and its interpretation.\n\nSigned-off-by: Rasmus Villemoes <ravi@prevas.dk>\n---\n cmd/mmc.c             | 36 +++++++++++++++++++++++++++---------\n doc/usage/cmd/mmc.rst |  4 ++--\n 2 files changed, 29 insertions(+), 11 deletions(-)",
    "diff": "diff --git a/cmd/mmc.c b/cmd/mmc.c\nindex 81b1ca4ad84..f217dfdacaa 100644\n--- a/cmd/mmc.c\n+++ b/cmd/mmc.c\n@@ -1012,16 +1012,10 @@ static int do_mmc_rst_func(struct cmd_tbl *cmdtp, int flag,\n \t * The only valid values are 0x0, 0x1 and 0x2 and writing\n \t * a value of 0x1 or 0x2 sets the value permanently.\n \t */\n-\tif (argc != 3)\n+\tif (argc < 2 || argc > 3)\n \t\treturn CMD_RET_USAGE;\n \n \tdev = dectoul(argv[1], NULL);\n-\tenable = dectoul(argv[2], NULL);\n-\n-\tif (enable > 2) {\n-\t\tputs(\"Invalid RST_n_ENABLE value\\n\");\n-\t\treturn CMD_RET_USAGE;\n-\t}\n \n \tmmc = init_mmc_device(dev, false);\n \tif (!mmc)\n@@ -1032,6 +1026,30 @@ static int do_mmc_rst_func(struct cmd_tbl *cmdtp, int flag,\n \t\treturn CMD_RET_FAILURE;\n \t}\n \n+\tif (argc == 2) {\n+\t\tALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);\n+\t\tret = mmc_send_ext_csd(mmc, ext_csd);\n+\t\tif (ret)\n+\t\t\treturn CMD_RET_FAILURE;\n+\n+\t\tprintf(\"RST_n_FUNCTION: 0x%x \", ext_csd[EXT_CSD_RST_N_FUNCTION]);\n+\t\tswitch (ext_csd[EXT_CSD_RST_N_FUNCTION]) {\n+\t\tcase 0x0: puts(\"(temporarily disabled)\\n\"); break;\n+\t\tcase 0x1: puts(\"(permanently enabled)\\n\"); break;\n+\t\tcase 0x2: puts(\"(permanently disabled)\\n\"); break;\n+\t\tdefault: puts(\"(unknown)\\n\");\n+\t\t}\n+\n+\t\treturn CMD_RET_SUCCESS;\n+\t}\n+\n+\tenable = dectoul(argv[2], NULL);\n+\n+\tif (enable > 2) {\n+\t\tputs(\"Invalid RST_n_ENABLE value\\n\");\n+\t\treturn CMD_RET_USAGE;\n+\t}\n+\n \tret = mmc_set_rst_n_function(mmc, enable);\n \tif (ret != 0)\n \t\treturn CMD_RET_FAILURE;\n@@ -1344,8 +1362,8 @@ U_BOOT_CMD(\n \t\"mmc partconf <dev> [[varname] | [<boot_ack> <boot_partition> <partition_access>]]\\n\"\n \t\" - Show or change the bits of the PARTITION_CONFIG field of the specified device\\n\"\n \t\"   If showing the bits, optionally store the boot_partition field into varname\\n\"\n-\t\"mmc rst-function <dev> <value>\\n\"\n-\t\" - Change the RST_n_FUNCTION field of the specified device\\n\"\n+\t\"mmc rst-function <dev> [<value>]\\n\"\n+\t\" - Show or change the RST_n_FUNCTION field of the specified device\\n\"\n \t\"   WARNING: This is a write-once field and 0 / 1 / 2 are the only valid values.\\n\"\n #endif\n #if CONFIG_IS_ENABLED(CMD_MMC_RPMB)\ndiff --git a/doc/usage/cmd/mmc.rst b/doc/usage/cmd/mmc.rst\nindex 55391fda24c..c6ab334b3d4 100644\n--- a/doc/usage/cmd/mmc.rst\n+++ b/doc/usage/cmd/mmc.rst\n@@ -24,7 +24,7 @@ Synopsis\n     mmc bootbus <dev> <boot_bus_width> <reset_boot_bus_width> <boot_mode>\n     mmc bootpart-resize <dev> <dev part size MB> <RPMB part size MB>\n     mmc partconf <dev> [[varname] | [<boot_ack> <boot_partition> <partition_access>]]\n-    mmc rst-function <dev> <value>\n+    mmc rst-function <dev> [<value>]\n     mmc reg read <reg> <offset> [env]\n \n Description\n@@ -178,7 +178,7 @@ The 'mmc bootpart-resize' command changes sizes of boot and RPMB partitions.\n     RPMB part size MB\n         target size of RPMB partition\n \n-The 'mmc rst-function' command changes the RST_n_FUNCTION field.\n+The 'mmc rst-function' command shows or changes the RST_n_FUNCTION field.\n **WARNING** : This is a write-once field. (*Refer to eMMC specification*)\n \n     value\n",
    "prefixes": []
}