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