[U-Boot] [PATCH] arm: mx5: Add LDB clock config code

[Stefano Babic]

Hi Marek,

On 04/10/2018 21:17, Marek Vasut wrote:
> Add code to configure PLL4, from which the LDB clock are directly
> derived.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Stefano Babic <sbabic at denx.de>
> ---
>  arch/arm/include/asm/arch-mx5/clock.h |  1 +
>  arch/arm/mach-imx/mx5/clock.c         | 21 +++++++++++++++++++++
>  2 files changed, 22 insertions(+)
> 
> diff --git a/arch/arm/include/asm/arch-mx5/clock.h b/arch/arm/include/asm/arch-mx5/clock.h
> index 0ecbdeede5..6f5ca5888a 100644
> --- a/arch/arm/include/asm/arch-mx5/clock.h
> +++ b/arch/arm/include/asm/arch-mx5/clock.h
> @@ -38,6 +38,7 @@ enum mxc_clock {
>  	MXC_NFC_CLK,
>  	MXC_PERIPH_CLK,
>  	MXC_I2C_CLK,
> +	MXC_LDB_CLK,
>  };
>  
>  u32 imx_get_uartclk(void);
> diff --git a/arch/arm/mach-imx/mx5/clock.c b/arch/arm/mach-imx/mx5/clock.c
> index 427cb12415..dcefc4276a 100644
> --- a/arch/arm/mach-imx/mx5/clock.c
> +++ b/arch/arm/mach-imx/mx5/clock.c
> @@ -838,6 +838,23 @@ static int config_ddr_clk(u32 emi_clk)
>  	return 0;
>  }
>  
> +static int config_ldb_clk(u32 ref, u32 freq)
> +{
> +	int ret = 0;
> +	struct pll_param pll_param;
> +
> +	memset(&pll_param, 0, sizeof(struct pll_param));
> +
> +	ret = calc_pll_params(ref, freq, &pll_param);
> +	if (ret != 0) {
> +		printf("Error:Can't find pll parameters: %d\n",
> +			ret);
> +		return ret;
> +	}
> +
> +	return config_pll_clk(PLL4_CLOCK, &pll_param);

This patch breaks the ts4800 board because this is not defined. Can you
take a look please ?

> +}
> +
>  /*
>   * This function assumes the expected core clock has to be changed by
>   * modifying the PLL. This is NOT true always but for most of the times,
> @@ -879,6 +896,10 @@ int mxc_set_clock(u32 ref, u32 freq, enum mxc_clock clk)
>  		if (config_nfc_clk(freq))
>  			return -EINVAL;
>  		break;
> +	case MXC_LDB_CLK:
> +		if (config_ldb_clk(ref, freq))
> +			return -EINVAL;
> +		break;
>  	default:
>  		printf("Warning:Unsupported or invalid clock type\n");
>  	}
> 

Best regards,
Stefano

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