acpi-cpufreq: Add comment under ACPI_ADR_SPACE_SYSTEM_IO case
authorViresh Kumar <viresh.kumar@linaro.org>
Wed, 16 Oct 2013 21:58:10 +0000 (23:58 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 16 Oct 2013 21:58:10 +0000 (23:58 +0200)
commit1bab64d50e09706ee2e634b2df3c53346f0a0dbb
treeb7df2d323eb358e1633506ed360a191a41e1ae8d
parent076dec90fc32c830184b0f0fa1842a6de1199bc6
acpi-cpufreq: Add comment under ACPI_ADR_SPACE_SYSTEM_IO case

policy->cur is now set by cpufreq core when cpufreq_driver->get() is defined and
so drivers aren't required to set it. When space_id is ACPI_ADR_SPACE_SYSTEM_IO
for acpi cpufreq driver it doesn't set ->get to a valid function pointer and so
policy->cur is required to be set by driver.

This is already followed in acpi-cpufreq driver. This patch adds a comment
describing why we need to set policy->cur from driver.

Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/cpufreq/acpi-cpufreq.c