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ppc4xx: Add support for 2nd I2C EEPROM on lwmon5 board

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This patch adds support for the 2nd EEPROM (AT24C128) on the lwmon5
board. Now the "eeprom" command can be used to read/write from/to this
device. Additionally a new command was added "eepromwp" to en-/disable
the write-protect of this 2nd EEPROM.

The 1st EEPROM is not affected by this write-protect command.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese
2007-08-23 11:02:37 +02:00
parent c64fb30e4c
commit c25dd8fc25
2 changed files with 36 additions and 6 deletions
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27
board/lwmon5/lwmon5.c
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@@ -19,6 +19,7 @@
*/
#include <common.h>
#include <command.h>
#include <ppc440.h>
#include <asm/processor.h>
#include <asm/gpio.h>
@@ -527,3 +528,29 @@ void hw_watchdog_reset(void)
val = gpio_read_out_bit(CFG_GPIO_WATCHDOG) == 0 ? 1 : 0;
gpio_write_bit(CFG_GPIO_WATCHDOG, val);
}
int do_eeprom_wp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
if (argc < 2) {
printf("Usage:\n%s\n", cmdtp->usage);
return 1;
}
if ((strcmp(argv[1], "on") == 0)) {
gpio_write_bit(CFG_GPIO_EEPROM_EXT_WP, 1);
} else if ((strcmp(argv[1], "off") == 0)) {
gpio_write_bit(CFG_GPIO_EEPROM_EXT_WP, 0);
} else {
printf("Usage:\n%s\n", cmdtp->usage);
return 1;
}
return 0;
}
U_BOOT_CMD(
eepromwp, 2, 0, do_eeprom_wp,
"eepromwp- eeprom write protect off/on\n",
"<on|off> - enable (on) or disable (off) I2C EEPROM write protect\n"
);