Thread (31 messages) 31 messages, 5 authors, 2017-04-13

Re: [RFC 3/8] cpufreq: imx6q: Set max suspend_freq to avoid changes during suspend

From: Viresh Kumar <viresh.kumar@linaro.org>
Date: 2017-03-23 04:34:42
Also in: linux-arm-kernel, linux-pm, lkml

On 22-03-17, 18:53, Leonard Crestez wrote:
If the cpufreq driver tries to modify voltage/freq during suspend/resume
it might need to control an external PMIC via I2C or SPI but those
devices might be already suspended.

To avoid this scenario we just increase cpufreq to highest setpoint
before suspend. This issue can easily be triggered by ldo-bypass but in
theory any regulator set_voltage call can end up having to modify
external supply voltages.

Signed-off-by: Leonard Crestez <redacted>
---
 drivers/cpufreq/imx6q-cpufreq.c | 2 ++
 1 file changed, 2 insertions(+)
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

-- 
viresh
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