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authorTim Harvey <tharvey@gateworks.com>2016-05-24 11:03:50 -0700
committerStefano Babic <sbabic@denx.de>2016-05-31 17:24:15 +0200
commitefa7ed7236ee5bfab871f35ce70f3e3e1d39b4f6 (patch)
tree3c715c338a8dadc59bbeec9c09dcea5cc5220edb /board
parent6052b1c6f4fadee751dd7c90a4148943f65ab7b0 (diff)
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imx: ventana: gsc: add gsc sleep command
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>
Diffstat (limited to 'board')
-rw-r--r--board/gateworks/gw_ventana/gsc.c46
1 files changed, 45 insertions, 1 deletions
diff --git a/board/gateworks/gw_ventana/gsc.c b/board/gateworks/gw_ventana/gsc.c
index 4f26bfd..2555824 100644
--- a/board/gateworks/gw_ventana/gsc.c
+++ b/board/gateworks/gw_ventana/gsc.c
@@ -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 */