diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.22/601-eeprom_93cx6_fixes.patch')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.22/601-eeprom_93cx6_fixes.patch | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.22/601-eeprom_93cx6_fixes.patch b/target/linux/generic-2.6/patches-2.6.22/601-eeprom_93cx6_fixes.patch new file mode 100644 index 0000000000..6957348b55 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.22/601-eeprom_93cx6_fixes.patch @@ -0,0 +1,116 @@ +From: Ivo van Doorn <ivdoorn@gmail.com> +Date: Mon, 14 May 2007 21:06:01 +0000 (+0200) +Subject: [PATCH] eeprom_93cx6: Add comment for 1us delay after pulse +X-Git-Tag: v2.6.23-rc1~1201^2~73 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=4b914dc0493edff19ff698a18198a173a14ba9d2 + +[PATCH] eeprom_93cx6: Add comment for 1us delay after pulse + +This will add a comment for the 1us delay which is taken +after the pulse has been switched. The 1us delay is based +on the specifications so that should be made clear. + +Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> +Signed-off-by: John W. Linville <linville@tuxdriver.com> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index bfcb434..0d6d742 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -39,6 +39,12 @@ static inline void eeprom_93cx6_pulse_high(struct eeprom_93cx6 *eeprom) + { + eeprom->reg_data_clock = 1; + eeprom->register_write(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. ++ */ + udelay(1); + } + +@@ -46,6 +52,12 @@ static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom) + { + eeprom->reg_data_clock = 0; + eeprom->register_write(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. ++ */ + udelay(1); + } + +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) +From: Francois Romieu <romieu@fr.zoreil.com> +Date: Tue, 3 Jul 2007 22:31:44 +0000 (+0200) +Subject: eeprom_93cx6: shorten pulse timing to match spec (bis) +X-Git-Tag: v2.6.23-rc1~1151^2~11 +X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=8abd531e3f77188de2fc41e677d075cc66e61631 + +eeprom_93cx6: shorten pulse timing to match spec (bis) + +Based on an original idea by John W. Linville. + +It is the missing part of 42d45ccd60636c28e35c2016f091783bc14ad99c + +Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> +Signed-off-by: Jeff Garzik <jeff@garzik.org> +--- + +diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c +index ac515b0..ea55654 100644 +--- a/drivers/misc/eeprom_93cx6.c ++++ b/drivers/misc/eeprom_93cx6.c +@@ -55,10 +55,10 @@ static inline void eeprom_93cx6_pulse_low(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 void eeprom_93cx6_startup(struct eeprom_93cx6 *eeprom) |