diff options
Diffstat (limited to 'drivers/cpufreq/imx6q-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/imx6q-cpufreq.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index c426928a0b39..906f965498ee 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -25,6 +25,8 @@ #define FREQ_1P2_GHZ 1200000000 #define FREQ_396_MHZ 396000 #define FREQ_696_MHZ 696000 +#define FREQ_99_MHZ 99000 +#define FREQ_24_MHZ 24000 static struct regulator *arm_reg; static struct regulator *pu_reg; @@ -65,6 +67,16 @@ static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index) freq_hz = new_freq * 1000; old_freq = policy->cur; + /* + * ON i.MX6ULL, the 24MHz setpoint is not seen by cpufreq + * so we neet to prevent the cpufreq change frequency + * from 24MHz to 99Mhz directly. busfreq will handle this + * when exit from low bus mode. + */ + if (old_freq == FREQ_24_MHZ && new_freq == FREQ_99_MHZ) { + return 0; + }; + opp = dev_pm_opp_find_freq_ceil(cpu_dev, &freq_hz); if (IS_ERR(opp)) { dev_err(cpu_dev, "failed to find OPP for %ld\n", freq_hz); |