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imx: mx6sx: Disable ENET clock before switching clock parent 

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@nxp.com>
Signed-off-by: Ye.Li <ye.li@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Ye.Li 2016-10-08 16:58:29 +08:00 committed by Stefano Babic
parent 29e0cfb4f7
commit 27e3a3c7f8
1 changed files with 5 additions and 0 deletions
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5
arch/arm/cpu/armv7/mx6/clock.c
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@ -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