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| author | Ye.Li <B37916@freescale.com> | 2015-03-30 16:03:13 +0800 |
|---|---|---|
| committer | Ye.Li <B37916@freescale.com> | 2015-04-08 10:25:29 +0800 |
| commit | 7490062ff86e1132b95bf153091f28f7940c0cf9 (patch) | |
| tree | 7828035e80bfa76c73216a40f217dbaed9c9100d /arch/arm | |
| parent | d2fb113740b2c67958862503dda2a40191ab0899 (diff) | |
| download | u-boot-imx-7490062ff86e1132b95bf153091f28f7940c0cf9.zip u-boot-imx-7490062ff86e1132b95bf153091f28f7940c0cf9.tar.gz u-boot-imx-7490062ff86e1132b95bf153091f28f7940c0cf9.tar.bz2 | |
MLK-10504 imx: mx6dqarm2: Fix CCM setting for lpddr2 400Mhz support
Current uboot supports for running LPDDR2 at 400MHz on MX6Q ARM2 board,
but there is a problem in switching pre_periph_clk_sel to pll2_pfd2.
We cannot directly change the parent of pre_periph_clk_sel as this mux
is not a glitchless mux. We need to follow the correct procedure and wait
for the busy bits to clear before switching.
Change to follow the procedure:
1. Set periph_clk2 to OSC.
2. Switch the periph_clk to periph_clk2, checking the CCM_CDHIPR for periph_clk
, ahb_podf and axi_podf busy bits.
3. Setting the pre_periph_clk to PLL2 PFD 396M.
4. Switch the periph_clk back to pre_periph_clk and checking CCM_CDHIPR busy bits.
Signed-off-by: Ye.Li <B37916@freescale.com>
Diffstat (limited to 'arch/arm')
0 files changed, 0 insertions, 0 deletions