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

Hi Peng,

On 08/10/2016 10:58, Peng Fan wrote:

From: "Ye.Li" ye.li@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@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 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