diff options
Diffstat (limited to 'target/linux/generic-2.6/patches/002-eeprom_93cx6.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches/002-eeprom_93cx6.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches/002-eeprom_93cx6.patch b/target/linux/generic-2.6/patches/002-eeprom_93cx6.patch new file mode 100644 index 000000000..7f2b12554 --- /dev/null +++ b/target/linux/generic-2.6/patches/002-eeprom_93cx6.patch @@ -0,0 +1,36 @@ +From: John W. Linville <linville@tuxdriver.com> +Date: Tue, 12 Jun 2007 01:37:46 +0000 (-0400) +Subject: [PATCH] eeprom_93cx6: shorten pulse timing to match spec +X-Git-Tag: v2.6.23-rc1~1201^2~71 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=7e9400f178d291b2208c4ed9aac0f425c1364000 + +[PATCH] eeprom_93cx6: shorten pulse timing to match spec + +93cx6 datasheet available here: + + http://ww1.microchip.com/downloads/en/DeviceDoc/21749F.pdf + +Figure 1-1 and Table 1-2 on pages 4-5 indicate that both Clock High +Time and Clock Low Time have largest minimum times of 450ns. + +Signed-off-by: John W. Linville <linville@tuxdriver.com> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index 0d6d742..ac515b0 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -42,10 +42,10 @@ static inline void eeprom_93cx6_pulse_high(struct eeprom_93cx6 *eeprom) + + /* + * Add a short delay for the pulse to work. +- * According to the specifications the minimal time +- * should be 450ns so a 1us delay is sufficient. ++ * According to the specifications the "maximum minimum" ++ * time should be 450ns. + */ +- udelay(1); ++ ndelay(450); + } + + static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) |