mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-06 11:21:52 +02:00
d03a2de5d3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8355 3c298f89-4303-0410-b956-a3cf2f4a3e73
37 lines
1.3 KiB
Diff
37 lines
1.3 KiB
Diff
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)
|