[U-Boot] [PATCH 2/3] ARM: imx6: configure ddrcode pins in spl DHCOM i.MX6 PDK

[Stefano Babic <sbabic@denx.de>]

On 05/07/2018 09:23, lzenz at dh-electronics.de wrote:
> From: Ludwig Zenz <lzenz@dh-electronics.de>
> 
> Preperation for conditional DDR3 initialization based on GPIO codes.
> 
> Signed-off-by: Ludwig Zenz <lzenz@dh-electronics.de>
> ---
>  board/dhelectronics/dh_imx6/dh_imx6_spl.c | 40 +++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 
> diff --git a/board/dhelectronics/dh_imx6/dh_imx6_spl.c b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
> index beda389..eafb86d 100644
> --- a/board/dhelectronics/dh_imx6/dh_imx6_spl.c
> +++ b/board/dhelectronics/dh_imx6/dh_imx6_spl.c
> @@ -208,6 +208,45 @@ static void setup_iomux_boardid(void)
>  	SETUP_IOMUX_PADS(hwcode_pads);
>  }
>  
> +/* DDR Code */
> +static iomux_v3_cfg_t const ddrcode_pads[] = {
> +	IOMUX_PADS(PAD_EIM_A16__GPIO2_IO22	| MUX_PAD_CTRL(GPIO_PAD_CTRL)),
> +	IOMUX_PADS(PAD_EIM_A17__GPIO2_IO21	| MUX_PAD_CTRL(GPIO_PAD_CTRL)),
> +};
> +
> +static void setup_iomux_ddrcode(void)
> +{
> +	/* ddr code pins */
> +	SETUP_IOMUX_PADS(ddrcode_pads);
> +}
> +
> +enum dhcom_ddr3_code {
> +	DH_DDR3_SIZE_256MIB = 0x00,
> +	DH_DDR3_SIZE_512MIB = 0x01,
> +	DH_DDR3_SIZE_1GIB   = 0x02,
> +	DH_DDR3_SIZE_2GIB   = 0x03
> +};
> +
> +#define DDR3_CODE_BIT_0   IMX_GPIO_NR(2, 22)
> +#define DDR3_CODE_BIT_1   IMX_GPIO_NR(2, 21)
> +
> +enum dhcom_ddr3_code dhcom_get_ddr3_code(void)
> +{
> +	enum dhcom_ddr3_code ddr3_code;
> +
> +	gpio_request(DDR3_CODE_BIT_0, "DDR3_CODE_BIT_0");
> +	gpio_request(DDR3_CODE_BIT_1, "DDR3_CODE_BIT_1");
> +
> +	gpio_direction_input(DDR3_CODE_BIT_0);
> +	gpio_direction_input(DDR3_CODE_BIT_1);
> +
> +	/* 256MB = 0b00; 512MB = 0b01; 1GB = 0b10; 2GB = 0b11 */
> +	ddr3_code = (!!gpio_get_value(DDR3_CODE_BIT_1) << 1)
> +	     | (!!gpio_get_value(DDR3_CODE_BIT_0));
> +
> +	return ddr3_code;
> +}
> +
>  /* GPIO */
>  static iomux_v3_cfg_t const gpio_pads[] = {
>  	IOMUX_PADS(PAD_GPIO_2__GPIO1_IO02	| MUX_PAD_CTRL(GPIO_PAD_CTRL)),
> @@ -365,6 +404,7 @@ void board_init_f(ulong dummy)
>  	timer_init();
>  
>  	setup_iomux_boardid();
> +	setup_iomux_ddrcode();
>  	setup_iomux_gpio();
>  	setup_iomux_enet();
>  	setup_iomux_sd();
> 
Applied to u-boot-imx, thanks !

Best regards,
Stefano Babic


-- 
=====================================================================
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================