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- From 8121cece25da8dad1dc91393f5285195997c71b1 Mon Sep 17 00:00:00 2001
- From: Patrick Oppenlander <patrick.oppenlander@gmail.com>
- Date: Fri, 14 Feb 2020 09:13:32 +1100
- Subject: [PATCH] mmc-utils: Fix scaling of cache size
-
- JESD84-B51 7.4.30 CACHE_SIZE [252:249] states that "the size is
- indicated as multiple of kilobits". This is also supported by Table 39,
- "e.MMC internal sizes and related Units / Granularities" which lists
- "32Kb (=4KB)" as the cache size granularity for 4KiB native devices.
-
- Signed-off-by: Patrick Oppenlander <patrick.oppenlander@gmail.com>
- Reviewed-by: Avri Altman <avri.altman@wdc.com>
- ---
- mmc_cmds.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
- --- a/mmc_cmds.c
- +++ b/mmc_cmds.c
- @@ -1427,8 +1427,8 @@ int do_read_extcsd(int nargs, char **arg
- printf("Power off notification [POWER_OFF_LONG_TIME: 0x%02x]\n",
- ext_csd[247]);
- printf("Cache Size [CACHE_SIZE] is %d KiB\n",
- - ext_csd[249] << 0 | (ext_csd[250] << 8) |
- - (ext_csd[251] << 16) | (ext_csd[252] << 24));
- + (ext_csd[249] << 0 | (ext_csd[250] << 8) |
- + (ext_csd[251] << 16) | (ext_csd[252] << 24)) / 8);
- }
-
- /* A441: Reserved [501:247]
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