brain-hackers_pepepper-mirror/u-boot-brain
1
0
Fork 0
mirror of https://github.com/brain-hackers/u-boot-brain synced 2024-10-01 09:00:45 +09:00
Code Issues Projects Releases Wiki Activity

imx: mx6: lcdif: gate clock before changing mux

Browse Source 
The mux for the lcd clock is not glitchless,
so need to first gate the clock before changing the mux.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2016-12-11 19:24:26 +08:00 committed by Stefano Babic
parent 0e81982de0
commit 70ac169723
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/cpu/armv7/mx6/clock.c
View File

@ -771,6 +771,16 @@ int enable_lcdif_clock(u32 base_addr)
return 0;
}
/* Gate LCDIF clock first */
reg = readl(&imx_ccm->CCGR3);
reg &= ~lcdif_ccgr3_mask;
writel(reg, &imx_ccm->CCGR3);
reg = readl(&imx_ccm->CCGR2);
reg &= ~MXC_CCM_CCGR2_LCD_MASK;
writel(reg, &imx_ccm->CCGR2);
/* Select pre-mux */
reg = readl(&imx_ccm->cscdr2);
reg &= ~lcdif_clk_sel_mask;
writel(reg, &imx_ccm->cscdr2);