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arm: mvebu: Espressobin: Detect presence of emmc at runtime 

Try to initialize emmc in board_late_init() and if it fails then we know
that emmc device is not connected.

This allows to use in U-Boot just one DTS file for all Espressobin variants
and also to correctly set fdtfile env variable for Linux kernel.

Signed-off-by: Pali Rohár <pali@kernel.org>
Tested-by: Gérald Kerma <gerald@gk2.net>
Reviewed-by: Andre Heider <a.heider@gmail.com>
This commit is contained in:
Pali Rohár 2020-11-25 19:20:10 +01:00 committed by Stefan Roese
parent 135973967b
commit 061c6d1b23
1 changed files with 5 additions and 1 deletions
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6
board/Marvell/mvebu_armada-37xx/board.c
View File

@ -8,6 +8,7 @@
#include <env.h>
#include <i2c.h>
#include <init.h>
#include <mmc.h>
#include <phy.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
@ -83,6 +84,7 @@ int board_init(void)
#ifdef CONFIG_BOARD_LATE_INIT
int board_late_init(void)
{
struct mmc *mmc_dev;
bool ddr4, emmc;
if (env_get("fdtfile"))
@ -95,7 +97,9 @@ int board_late_init(void)
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;
emmc = of_machine_is_compatible("globalscale,espressobin-emmc");
/* eMMC is mmc dev num 1 */
mmc_dev = find_mmc_device(1);
emmc = (mmc_dev && mmc_init(mmc_dev) == 0);
if (ddr4 && emmc)
env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");