From 85bdb3f281af0113a787b0d97a4f9a0e3fd53c30 Mon Sep 17 00:00:00 2001 From: Michael Heimpold Date: Tue, 18 Feb 2020 22:29:53 +0100 Subject: [PATCH] mmc-utils: add patch for cache size scaling Signed-off-by: Michael Heimpold --- utils/mmc-utils/Makefile | 2 +- ...-mmc-utils-Fix-scaling-of-cache-size.patch | 34 +++++++++++++++++++ 2 files changed, 35 insertions(+), 1 deletion(-) create mode 100644 utils/mmc-utils/patches/0011-mmc-utils-Fix-scaling-of-cache-size.patch diff --git a/utils/mmc-utils/Makefile b/utils/mmc-utils/Makefile index 060381ee4..43513f5f9 100644 --- a/utils/mmc-utils/Makefile +++ b/utils/mmc-utils/Makefile @@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk PKG_NAME:=mmc-utils -PKG_RELEASE:=1 +PKG_RELEASE:=2 PKG_SOURCE_PROTO:=git PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git diff --git a/utils/mmc-utils/patches/0011-mmc-utils-Fix-scaling-of-cache-size.patch b/utils/mmc-utils/patches/0011-mmc-utils-Fix-scaling-of-cache-size.patch new file mode 100644 index 000000000..591056413 --- /dev/null +++ b/utils/mmc-utils/patches/0011-mmc-utils-Fix-scaling-of-cache-size.patch @@ -0,0 +1,34 @@ +From 8121cece25da8dad1dc91393f5285195997c71b1 Mon Sep 17 00:00:00 2001 +From: Patrick Oppenlander +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 +Reviewed-by: Avri Altman +--- + mmc_cmds.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/mmc_cmds.c b/mmc_cmds.c +index c006ef2..556c105 100644 +--- a/mmc_cmds.c ++++ b/mmc_cmds.c +@@ -1427,8 +1427,8 @@ int do_read_extcsd(int nargs, char **argv) + 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] +-- +2.17.1 +