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authorIvo van Doorn <ivdoorn@gmail.com>2007-05-14 23:06:01 +0200
committerJeff Garzik <jeff@garzik.org>2007-07-08 22:16:36 -0400
commit4b914dc0493edff19ff698a18198a173a14ba9d2 (patch)
tree9a1126599f664cea033b896ccea54acd37dc82af /drivers/misc
parent9467d64b0e88763914c01f71ddf591b166c4f526 (diff)
downloadlinux-4b914dc0493edff19ff698a18198a173a14ba9d2.tar.bz2
[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>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/eeprom_93cx6.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/misc/eeprom_93cx6.c b/drivers/misc/eeprom_93cx6.c
index bfcb43424dcd..0d6d742d42c3 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);
}