[U-Boot] [PATCH] imx: mx6sx: Disable ENET clock before switching clock parent

[Stefano Babic]

Hi Peng,

On 08/10/2016 10:58, Peng Fan wrote:
> From: "Ye.Li" <ye.li at nxp.com>
> 
> Need to gate ENET clock when switching to a new clock parent, because
> the mux is not glitchless.
> 
> Signed-off-by: Peng Fan <peng.fan at nxp.com>
> Signed-off-by: Ye.Li <ye.li at nxp.com>
> Cc: Stefano Babic <sbabic at denx.de>
> ---
>  arch/arm/cpu/armv7/mx6/clock.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c
> index ae3143c..96fbd81 100644
> --- a/arch/arm/cpu/armv7/mx6/clock.c
> +++ b/arch/arm/cpu/armv7/mx6/clock.c
> @@ -881,6 +881,11 @@ int enable_fec_anatop_clock(int fec_id, enum enet_freq freq)
>  	writel(reg, &anatop->pll_enet);
>  
>  #ifdef CONFIG_MX6SX
> +	/* Disable enet system clcok before switching clock parent */
> +	reg = readl(&imx_ccm->CCGR3);
> +	reg &= ~MXC_CCM_CCGR3_ENET_MASK;
> +	writel(reg, &imx_ccm->CCGR3);
> +
>  	/*
>  	 * Set enet ahb clock to 200MHz
>  	 * pll2_pfd2_396m-> ENET_PODF-> ENET_AHB
> 

Applied to u-boot-imx, -next branch, thanks !

Best regards,
Stefano Babic

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