[U-Boot] [PATCH] mmc: atmel: Add support fo atmel sdhci

[Bo Shen <voice.shen@gmail.com>]

Hi Wenyou,

On 09/16/2015 04:23 PM, Wenyou Yang wrote:

I think you should add commit message here.

> Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
> ---
>
>   arch/arm/mach-at91/include/mach/atmel_sdhci.h |   13 +++++++++
>   drivers/mmc/Makefile                          |    1 +
>   drivers/mmc/atmel_sdhci.c                     |   35 +++++++++++++++++++++++++
>   3 files changed, 49 insertions(+)
>   create mode 100644 arch/arm/mach-at91/include/mach/atmel_sdhci.h
>   create mode 100644 drivers/mmc/atmel_sdhci.c
>
> diff --git a/arch/arm/mach-at91/include/mach/atmel_sdhci.h b/arch/arm/mach-at91/include/mach/atmel_sdhci.h
> new file mode 100644
> index 0000000..cf3bf89
> --- /dev/null
> +++ b/arch/arm/mach-at91/include/mach/atmel_sdhci.h
> @@ -0,0 +1,13 @@
> +/*
> + * Copyright (c) 2015 Atmel Corporation
> + *		      Wenyou.Yang <wenyou.yang@atmel.com>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#ifndef	__ATMEL_SDHCI_H
> +#define	__ATMEL_SDHCI_H
> +
> +int atmel_sdhci_init(void *regbase, u32 id);
> +
> +#endif
> diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
> index 99d0295..5d35705 100644
> --- a/drivers/mmc/Makefile
> +++ b/drivers/mmc/Makefile
> @@ -8,6 +8,7 @@
>   obj-$(CONFIG_DM_MMC) += mmc-uclass.o
>
>   obj-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o
> +obj-$(CONFIG_ATMEL_SDHCI) += atmel_sdhci.o
>   obj-$(CONFIG_BCM2835_SDHCI) += bcm2835_sdhci.o
>   obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o
>   obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
> diff --git a/drivers/mmc/atmel_sdhci.c b/drivers/mmc/atmel_sdhci.c
> new file mode 100644
> index 0000000..64776a1
> --- /dev/null
> +++ b/drivers/mmc/atmel_sdhci.c
> @@ -0,0 +1,35 @@
> +/*
> + * Copyright (C) 2015 Atmel Corporation
> + *		      Wenyou.Yang <wenyou.yang@atmel.com>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <malloc.h>
> +#include <sdhci.h>
> +#include <asm/arch/clk.h>
> +
> +#define ATMEL_SDHC_MIN_FRQ	400000

Nit: maybe FREQ is better than FRQ?

> +
> +int atmel_sdhci_init(void *regbase, u32 id)
> +{
> +	struct sdhci_host *host = NULL;
> +	u32 max_clk, min_clk = ATMEL_SDHC_MIN_FRQ;
> +
> +	host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));

How about "host = malloc(sizeof(*host));"?

> +	if (!host) {
> +		printf("atmel_sdhci_init: sdhci_host malloc fail\n");
> +		return -1;

Maybe use -ENOMEM replace -1?

> +	}
> +
> +	host->name = "atmel_sdhci";
> +	host->ioaddr = (void *)regbase;
> +	host->quirks = 0;
> +	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
> +	max_clk = at91_get_periph_generated_clk(id);

As we discussed with your patch for "at91_get_periph_generated_clk", 
this function may failed. So, I think you need add error check here.

> +	add_sdhci(host, max_clk, min_clk);
> +
> +	return 0;
> +}
>

Best Regards,
Bo Shen