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arm: mvebu: Espressobin: Set default value for $fdtfile env variable

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On Espressobin board value for $fdtfile cannot be determined at compile
time and is calculated at board runtime code. This change uses a new option
DEFAULT_ENV_IS_RW to allow modifying default_environment[] array at runtime
and set into it correct value.

This change also ensure that 'env default -a' set correct value to $fdtfile.

Signed-off-by: Pali Rohár <pali@kernel.org>
Acked-by: Andre Heider <a.heider@gmail.com>
This commit is contained in:
Pali Rohár
2020-12-23 12:21:29 +01:00
committed by Stefan Roese
parent 93f4048bc2
commit c4df0f6f31
2 changed files with 27 additions and 5 deletions
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19
board/Marvell/mvebu_armada-37xx/board.c
View File

@@ -7,6 +7,7 @@
#include <dm.h>
#include <dm/device-internal.h>
#include <env.h>
#include <env_internal.h>
#include <i2c.h>
#include <init.h>
#include <mmc.h>
@@ -85,6 +86,7 @@ int board_init(void)
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
char *ptr = (char *)&default_environment[0];
struct udevice *dev;
struct mmc *mmc_dev;
bool ddr4, emmc;
@@ -92,6 +94,10 @@ int board_late_init(void)
if (!of_machine_is_compatible("globalscale,espressobin"))
return 0;
/* Find free buffer in default_environment[] for new variables */
while (*ptr != '\0' && *(ptr+1) != '\0') ptr++;
ptr += 2;
/* If the memory controller has been configured for DDR4, we're running on v7 */
ddr4 = ((readl(A3700_CH0_MC_CTRL2_REG) >> A3700_MC_CTRL2_SDRAM_TYPE_OFFS)
& A3700_MC_CTRL2_SDRAM_TYPE_MASK) == A3700_MC_CTRL2_SDRAM_TYPE_DDR4;
@@ -110,14 +116,19 @@ int board_late_init(void)
if (env_get("fdtfile"))
return 0;
/* Ensure that 'env default -a' set correct value to $fdtfile */
if (ddr4 && emmc)
env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");
strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-v7-emmc.dtb");
else if (ddr4)
env_set("fdtfile", "marvell/armada-3720-espressobin-v7.dtb");
strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-v7.dtb");
else if (emmc)
env_set("fdtfile", "marvell/armada-3720-espressobin-emmc.dtb");
strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-emmc.dtb");
else
env_set("fdtfile", "marvell/armada-3720-espressobin.dtb");
strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin.dtb");
/* If $fdtfile was not set explicitly by user then set default value */
if (!env_get("fdtfile"))
env_set("fdtfile", ptr + sizeof("fdtfile="));
return 0;
}