redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

ARM: iMX5: Don't enable DPLL if it already enabled 

If the DPLL is already enabled, don't try to enable it again.
Since write to the DPLL control register will make the DPLL
reset and which will cause some issues when some child module
are sourced from this DPLL.

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
hifive-unleashed-5.1
Jason Liu 2011-08-05 23:34:32 +08:00 committed by Sascha Hauer
parent 2012d9ca2a
commit e1b96ada65
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-mx5/clock-mx51-mx53.c
View File

@ -271,7 +271,11 @@ static int _clk_pll_enable(struct clk *clk)
int i = 0;
pllbase = _get_pll_base(clk);
reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
if (reg & MXC_PLL_DP_CTL_UPEN)
return 0;
reg |= MXC_PLL_DP_CTL_UPEN;
__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
/* Wait for lock */