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imx: ventana: gsc: add gsc sleep command

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The Gateworks System Controller on Ventana boards has the ability to
disable the board's primary power supply until the RTC hits a specific
time. When sleeping a button-down event on the GSC user pushbutton will
wake the board before it's wake time has been reached. This feature is
referred to as GSC sleep.

Add a command to invoke sleep mode for a specified number of seconds.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2016-05-24 11:03:50 -07:00 committed by Stefano Babic
parent 6052b1c6f4
commit efa7ed7236
1 changed files with 45 additions and 1 deletions
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46
board/gateworks/gw_ventana/gsc.c
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@ -160,6 +160,48 @@ int gsc_boot_wd_disable(void)
}
#ifdef CONFIG_CMD_GSC
static int do_gsc_sleep(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
unsigned char reg;
unsigned long secs = 0;
if (argc < 2)
return CMD_RET_USAGE;
secs = simple_strtoul(argv[1], NULL, 10);
printf("GSC Sleeping for %ld seconds\n", secs);
i2c_set_bus_num(0);
reg = (secs >> 24) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, &reg, 1))
goto error;
reg = (secs >> 16) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, &reg, 1))
goto error;
reg = (secs >> 8) & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, &reg, 1))
goto error;
reg = secs & 0xff;
if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, &reg, 1))
goto error;
if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
reg |= (1 << 2);
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
reg &= ~(1 << 2);
reg |= 0x3;
if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, &reg, 1))
goto error;
return CMD_RET_SUCCESS;
error:
printf("i2c error\n");
return CMD_RET_FAILURE;
}
static int do_gsc_wd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
unsigned char reg;
@ -206,13 +248,15 @@ static int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
if (strcasecmp(argv[1], "wd") == 0)
return do_gsc_wd(cmdtp, flag, --argc, ++argv);
else if (strcasecmp(argv[1], "sleep") == 0)
return do_gsc_sleep(cmdtp, flag, --argc, ++argv);
return CMD_RET_USAGE;
}
U_BOOT_CMD(
gsc, 4, 1, do_gsc, "GSC configuration",
"[wd enable [30|60]]|[wd disable]\n"
"[wd enable [30|60]]|[wd disable]|[sleep <secs>]\n"
);
#endif /* CONFIG_CMD_GSC */