[U-Boot] [PATCH v2] arm: socfpga: Add I2C support to SoCFPGA

[Heiko Schocher]

Hello Stefan,

Am 30.10.2014 09:33, schrieb Stefan Roese:
> This patch adds I2C support for the SoCFPGA. Using the designware I2C
> controller driver. It supports all 4 I2C busses on the SoCFPGA.
>
> The designware I2C driver has now been converted to the
> CONFIG_SYS_I2C framework. So lets enable it on SoCFPGA.
>
> Tested on SoCrates.
>
> Signed-off-by: Stefan Roese<sr at denx.de>
> Cc: Marek Vasut<marex at denx.de>
> Cc: Chin Liang See<clsee at altera.com>
> Cc: Dinh Nguyen<dinguyen at altera.com>
> Cc: Vince Bridgers<vbridger at altera.com>
> Cc: Pavel Machek<pavel at denx.de>
> Cc: Heiko Schocher<hs at denx.de>
> ---
> v2:
> - The designware I2C driver now has been converted to the
>    CONFIG_SYS_I2C framework. Use the correct defines to enable it.
>
>   include/configs/socfpga_common.h | 27 +++++++++++++++++++++++++++
>   1 file changed, 27 insertions(+)

As the socfpga custodian should pick up this patch, I only Ack
this patch:

Acked-by: Heiko Schocher <hs at denx.de>

bye,
Heiko
>
> diff --git a/include/configs/socfpga_common.h b/include/configs/socfpga_common.h
> index 83a1bcd..f7b314d 100644
> --- a/include/configs/socfpga_common.h
> +++ b/include/configs/socfpga_common.h
> @@ -141,6 +141,33 @@
>   #define CONFIG_SYS_MMC_MAX_BLK_COUNT	256	/* FIXME -- SPL only? */
>   #endif
>
> + /*
> + * I2C support
> + */
> +#define CONFIG_SYS_I2C
> +#define CONFIG_SYS_I2C_DW
> +#define CONFIG_SYS_I2C_BUS_MAX		4
> +#define CONFIG_SYS_I2C_BASE		SOCFPGA_I2C0_ADDRESS
> +#define CONFIG_SYS_I2C_BASE1		SOCFPGA_I2C1_ADDRESS
> +#define CONFIG_SYS_I2C_BASE2		SOCFPGA_I2C2_ADDRESS
> +#define CONFIG_SYS_I2C_BASE3		SOCFPGA_I2C3_ADDRESS
> +/* Using standard mode which the speed up to 100Kb/s */
> +#define CONFIG_SYS_I2C_SPEED		100000
> +#define CONFIG_SYS_I2C_SPEED1		100000
> +#define CONFIG_SYS_I2C_SPEED2		100000
> +#define CONFIG_SYS_I2C_SPEED3		100000
> +/* Address of device when used as slave */
> +#define CONFIG_SYS_I2C_SLAVE		0x02
> +#define CONFIG_SYS_I2C_SLAVE1		0x02
> +#define CONFIG_SYS_I2C_SLAVE2		0x02
> +#define CONFIG_SYS_I2C_SLAVE3		0x02
> +#ifndef __ASSEMBLY__
> +/* Clock supplied to I2C controller in unit of MHz */
> +unsigned int cm_get_l4_sp_clk_hz(void);
> +#define IC_CLK				(cm_get_l4_sp_clk_hz() / 1000000)
> +#endif
> +#define CONFIG_CMD_I2C
> +
>   /*
>    * Serial Driver
>    */

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