From 27e3a3c7f8a469c61509102a672d210bdff46059 Mon Sep 17 00:00:00 2001 From: "Ye.Li" <ye.li@nxp.com> Date: Sat, 8 Oct 2016 16:58:29 +0800 Subject: [PATCH] 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> --- 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 ae3143c760..96fbd81d08 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 -- 2.39.5