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verdin-imx8mm: implement hardware version detection 

And select the correct devicetree accordingly by setting the variant
environment variable.

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
This commit is contained in:
Max Krummenacher 2020-10-28 11:58:13 +02:00 committed by Stefano Babic
parent 7d43807d6c
commit 423ca964c3
1 changed files with 71 additions and 0 deletions
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71
board/toradex/verdin-imx8mm/verdin-imx8mm.c
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@ -8,12 +8,22 @@
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <i2c.h>
#include <miiphy.h>
#include <netdev.h>
#include <micrel.h>
#include "../common/tdx-cfg-block.h"
DECLARE_GLOBAL_DATA_PTR;
#define I2C_PMIC 0
enum pcb_rev_t {
PCB_VERSION_1_0,
PCB_VERSION_1_1
};
#if IS_ENABLED(CONFIG_FEC_MXC)
static int setup_fec(void)
{
@ -104,8 +114,69 @@ int board_mmc_get_env_dev(int devno)
return devno;
}
static enum pcb_rev_t get_pcb_revision(void)
{
struct udevice *bus;
struct udevice *i2c_dev = NULL;
int ret;
u8 is_bd71837 = 0;
ret = uclass_get_device_by_seq(UCLASS_I2C, I2C_PMIC, &bus);
if (!ret)
ret = dm_i2c_probe(bus, 0x4b, 0, &i2c_dev);
if (!ret)
ret = dm_i2c_read(i2c_dev, 0x0, &is_bd71837, 1);
/* BD71837_REV, High Nibble is major version, fix 1010 */
is_bd71837 = !ret && ((is_bd71837 & 0xf0) == 0xa0);
return is_bd71837 ? PCB_VERSION_1_0 : PCB_VERSION_1_1;
}
static void select_dt_from_module_version(void)
{
char variant[32];
char *env_variant = env_get("variant");
int is_wifi = 0;
if (IS_ENABLED(CONFIG_TDX_CFG_BLOCK)) {
/*
* If we have a valid config block and it says we are a
* module with Wi-Fi/Bluetooth make sure we use the -wifi
* device tree.
*/
is_wifi = (tdx_hw_tag.prodid == VERDIN_IMX8MMQ_WIFI_BT_IT) ||
(tdx_hw_tag.prodid == VERDIN_IMX8MMDL_WIFI_BT_IT);
}
switch (get_pcb_revision()) {
case PCB_VERSION_1_0:
printf("Detected a V1.0 module\n");
if (is_wifi)
strncpy(&variant[0], "wifi", sizeof(variant));
else
strncpy(&variant[0], "nonwifi", sizeof(variant));
break;
default:
if (is_wifi)
strncpy(&variant[0], "wifi-v1.1", sizeof(variant));
else
strncpy(&variant[0], "nonwifi-v1.1", sizeof(variant));
break;
}
if (strcmp(variant, env_variant)) {
printf("Setting variant to %s\n", variant);
env_set("variant", variant);
if (IS_ENABLED(CONFIG_ENV_IS_NOWHERE))
env_save();
}
}
int board_late_init(void)
{
select_dt_from_module_version();
return 0;
}