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34 lines
1.2 KiB
34 lines
1.2 KiB
From 8121cece25da8dad1dc91393f5285195997c71b1 Mon Sep 17 00:00:00 2001
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From: Patrick Oppenlander <patrick.oppenlander@gmail.com>
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Date: Fri, 14 Feb 2020 09:13:32 +1100
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Subject: [PATCH] mmc-utils: Fix scaling of cache size
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JESD84-B51 7.4.30 CACHE_SIZE [252:249] states that "the size is
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indicated as multiple of kilobits". This is also supported by Table 39,
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"e.MMC internal sizes and related Units / Granularities" which lists
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"32Kb (=4KB)" as the cache size granularity for 4KiB native devices.
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Signed-off-by: Patrick Oppenlander <patrick.oppenlander@gmail.com>
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Reviewed-by: Avri Altman <avri.altman@wdc.com>
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---
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mmc_cmds.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/mmc_cmds.c b/mmc_cmds.c
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index c006ef2..556c105 100644
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--- a/mmc_cmds.c
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+++ b/mmc_cmds.c
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@@ -1427,8 +1427,8 @@ int do_read_extcsd(int nargs, char **argv)
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printf("Power off notification [POWER_OFF_LONG_TIME: 0x%02x]\n",
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ext_csd[247]);
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printf("Cache Size [CACHE_SIZE] is %d KiB\n",
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- ext_csd[249] << 0 | (ext_csd[250] << 8) |
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- (ext_csd[251] << 16) | (ext_csd[252] << 24));
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+ (ext_csd[249] << 0 | (ext_csd[250] << 8) |
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+ (ext_csd[251] << 16) | (ext_csd[252] << 24)) / 8);
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}
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/* A441: Reserved [501:247]
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--
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2.17.1
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