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zero-sugar: Set serial# from imx7 serial number 

Use the get_board_serial call to get the serial
number from the imx7 otp registers, and put it
into the serial# environment variable. This var
is in turn inserted into the device tree, and
used by Linux as a serial number.
zero-sugar
Lars Ivar Miljeteig 2020-02-05 15:19:43 +01:00
parent 87a8f6224b
commit 42071fa2ad
1 changed files with 39 additions and 0 deletions
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39
board/reMarkable/zero-sugar/zero-sugar.c
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@ -43,6 +43,10 @@
#include <console.h>
#include <membuff.h>
#include <environment.h>
#include <asm/setup.h>
#include <asm/bootm.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
@ -96,6 +100,39 @@ static int init_charger(void)
return 0;
}
static void save_serial(void)
{
struct tag_serialnr serialnr = {0};
char snstr[22] = {0};
u64 sn;
int ret;
if (env_get("serial#") != NULL)
return;
get_board_serial(&serialnr);
if (serialnr.low == 0 && !serialnr.high == 0)
return;
sn = (u64)serialnr.low + ((u64)serialnr.high << 32);
ret = snprintf(snstr, sizeof(snstr) - 1, "%llu", sn);
if (ret <= 0) {
printf("%s: Failed to write serial number to string\n", __func__);
return;
}
ret = env_set("serial#", snstr);
if (ret) {
printf("%s: Failed to write serial number to environment\n", __func__);
return;
}
if (env_save())
printf("%s: Failed to save environment\n", __func__);
}
int board_early_init_f(void)
{
setup_iomux_uart();
@ -134,5 +171,7 @@ int board_late_init(void)
power_perfs();
save_serial();
return 0;
}