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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.h>
#include <dm/device-internal.h> #include <dm/device-internal.h>
#include <env.h> #include <env.h>
#include <env_internal.h>
#include <i2c.h> #include <i2c.h>
#include <init.h> #include <init.h>
#include <mmc.h> #include <mmc.h>
@ -85,6 +86,7 @@ int board_init(void)
#ifdef CONFIG_BOARD_LATE_INIT #ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void) int board_late_init(void)
{ {
char *ptr = (char *)&default_environment[0];
struct udevice *dev; struct udevice *dev;
struct mmc *mmc_dev; struct mmc *mmc_dev;
bool ddr4, emmc; bool ddr4, emmc;
@ -92,6 +94,10 @@ int board_late_init(void)
if (!of_machine_is_compatible("globalscale,espressobin")) if (!of_machine_is_compatible("globalscale,espressobin"))
return 0; 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 */ /* 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) 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; & 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")) if (env_get("fdtfile"))
return 0; return 0;
/* Ensure that 'env default -a' set correct value to $fdtfile */
if (ddr4 && emmc) 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) else if (ddr4)
env_set("fdtfile", "marvell/armada-3720-espressobin-v7.dtb"); strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-v7.dtb");
else if (emmc) else if (emmc)
env_set("fdtfile", "marvell/armada-3720-espressobin-emmc.dtb"); strcpy(ptr, "fdtfile=marvell/armada-3720-espressobin-emmc.dtb");
else 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; return 0;
} }

13
include/configs/mvebu_armada-37xx.h
View file

@ -57,6 +57,11 @@
*/ */
#define CONFIG_MTD_PARTITIONS /* required for UBI partition support */ #define CONFIG_MTD_PARTITIONS /* required for UBI partition support */
/*
* Environment
*/
#define DEFAULT_ENV_IS_RW /* required for configuring default fdtfile= */
/* /*
* Ethernet Driver configuration * Ethernet Driver configuration
*/ */
@ -87,6 +92,11 @@
#include <config_distro_bootcmd.h> #include <config_distro_bootcmd.h>
/* filler for default values filled by board_early_init_f() */
#define ENV_RW_FILLER \
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0" /* for fdtfile= */ \
""
/* fdt_addr and kernel_addr are needed for existing distribution boot scripts */ /* fdt_addr and kernel_addr are needed for existing distribution boot scripts */
#define CONFIG_EXTRA_ENV_SETTINGS \ #define CONFIG_EXTRA_ENV_SETTINGS \
"scriptaddr=0x6d00000\0" \ "scriptaddr=0x6d00000\0" \
@ -96,6 +106,7 @@
"kernel_addr=0x7000000\0" \ "kernel_addr=0x7000000\0" \
"kernel_addr_r=0x7000000\0" \ "kernel_addr_r=0x7000000\0" \
"ramdisk_addr_r=0xa000000\0" \ "ramdisk_addr_r=0xa000000\0" \
BOOTENV BOOTENV \
ENV_RW_FILLER
#endif /* _CONFIG_MVEBU_ARMADA_37XX_H */ #endif /* _CONFIG_MVEBU_ARMADA_37XX_H */