From 4b914dc0493edff19ff698a18198a173a14ba9d2 Mon Sep 17 00:00:00 2001 From: Ivo van Doorn Date: Mon, 14 May 2007 23:06:01 +0200 Subject: [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 Signed-off-by: John W. Linville --- drivers/misc/eeprom_93cx6.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/misc') 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); } -- cgit v1.2.1