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eeprom_93cx6: Add data direction control.

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Some devices need to know if the data is to be output or read, so add a
data direction into the eeprom structure to tell the driver whether the
data line should be driven.

The user in this case is the Micrel KS8851 which has a direction
control for the EEPROM data line and thus needs to know whether
to drive it (writing) or to tristate it for receiving.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Cc: Wolfram Sang <w.sang@pengutronix.de>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Dooks
2011-11-21 08:57:56 +00:00
committed by David S. Miller
parent e9008ee99c
commit b30f8bdcfa
2 changed files with 5 additions and 0 deletions
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3
drivers/misc/eeprom/eeprom_93cx6.c
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@@ -63,6 +63,7 @@ static void eeprom_93cx6_startup(struct eeprom_93cx6 *eeprom)
eeprom->reg_data_out = 0;
eeprom->reg_data_clock = 0;
eeprom->reg_chip_select = 1;
eeprom->drive_data = 1;
eeprom->register_write(eeprom);
/*
@@ -101,6 +102,7 @@ static void eeprom_93cx6_write_bits(struct eeprom_93cx6 *eeprom,
*/
eeprom->reg_data_in = 0;
eeprom->reg_data_out = 0;
eeprom->drive_data = 1;
/*
* Start writing all bits.
@@ -140,6 +142,7 @@ static void eeprom_93cx6_read_bits(struct eeprom_93cx6 *eeprom,
*/
eeprom->reg_data_in = 0;
eeprom->reg_data_out = 0;
eeprom->drive_data = 0;
/*
* Start reading all bits.