diff options
| -rw-r--r-- | arch/arm/mach-imx/busfreq-imx.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/busfreq-imx.c b/arch/arm/mach-imx/busfreq-imx.c index 2cbc033ad07a..b6aa072d412b 100644 --- a/arch/arm/mach-imx/busfreq-imx.c +++ b/arch/arm/mach-imx/busfreq-imx.c @@ -618,6 +618,16 @@ static void exit_lpm_imx6sl(void) static void enter_lpm_imx7d(void) { + /* + * The AHB clock parent switch and divider change + * needs to keep previous/current parent enabled + * per design requirement, but when we switch the + * clock parent, previous AHB clock parent may be + * disabled by common clock framework, so here we + * have to make sure AHB's previous parent pfd2_270m + * is enabled during AHB set rate. + */ + clk_prepare_enable(pfd2_270m); if (audio_bus_count) { clk_prepare_enable(pfd0_392m); update_ddr_freq_imx_smp(HIGH_AUDIO_CLK); @@ -647,6 +657,7 @@ static void enter_lpm_imx7d(void) audio_bus_freq_mode = 0; cur_bus_freq_mode = BUS_FREQ_LOW; } + clk_disable_unprepare(pfd2_270m); } static void exit_lpm_imx7d(void) |