[PATCH 4/4] arm: mvebu: Espressobin: Detect presence of emmc at runtime

[Andre Heider]

On 25/11/2020 19:20, Pali Rohár wrote:
> 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 at kernel.org>
> Tested-by: Gérald Kerma <gerald at gk2.net>

Small nit below, with that:
Reviewed-by: Andre Heider <a.heider at gmail.com>

> ---
>   board/Marvell/mvebu_armada-37xx/board.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/board/Marvell/mvebu_armada-37xx/board.c b/board/Marvell/mvebu_armada-37xx/board.c
> index 73d69e0388..f67b04b78c 100644
> --- a/board/Marvell/mvebu_armada-37xx/board.c
> +++ b/board/Marvell/mvebu_armada-37xx/board.c
> @@ -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);

I think you meant "mmc_dev && (mmc_init(mmc_dev) == 0);"?

>   
>   	if (ddr4 && emmc)
>   		env_set("fdtfile", "marvell/armada-3720-espressobin-v7-emmc.dtb");
>