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d03a2de5d3
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8355 3c298f89-4303-0410-b956-a3cf2f4a3e73
47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From: Ivo van Doorn <ivdoorn@gmail.com>
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Date: Mon, 14 May 2007 21:06:01 +0000 (+0200)
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Subject: [PATCH] eeprom_93cx6: Add comment for 1us delay after pulse
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X-Git-Tag: v2.6.23-rc1~1201^2~73
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X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=4b914dc0493edff19ff698a18198a173a14ba9d2
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[PATCH] eeprom_93cx6: Add comment for 1us delay after pulse
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This will add a comment for the 1us delay which is taken
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after the pulse has been switched. The 1us delay is based
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on the specifications so that should be made clear.
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Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
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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 bfcb434..0d6d742 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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@@ -39,6 +39,12 @@ static inline void eeprom_93cx6_pulse_high(struct eeprom_93cx6 *eeprom)
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{
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eeprom->reg_data_clock = 1;
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eeprom->register_write(eeprom);
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+
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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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+ */
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udelay(1);
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}
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@@ -46,6 +52,12 @@ static inline void eeprom_93cx6_pulse_low(struct eeprom_93cx6 *eeprom)
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{
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eeprom->reg_data_clock = 0;
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eeprom->register_write(eeprom);
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+
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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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+ */
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udelay(1);
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}
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