diff options
| author | Javi Merino <javi.merino@arm.com> | 2016-09-15 15:44:23 +0100 |
|---|---|---|
| committer | Tao Huang <huangtao@rock-chips.com> | 2018-01-04 09:22:34 +0800 |
| commit | 5dcb4226bb3be808462bd5db4d693149fe633c4b (patch) | |
| tree | 4a7fd2be902e74eaef9bf9d83d2836205caf1bda /drivers/staging | |
| parent | ece9e5b00249694e8a5f2d87f4354bf891018c3a (diff) | |
BACKPORT: devfreq_cooling: pass a pointer to devfreq in the power model callbacks
When the devfreq cooling device was designed, it was an oversight not to
pass a pointer to the struct devfreq as the first parameters of the
callbacks. The design patterns of the kernel suggest it for a good
reason.
By passing a pointer to struct devfreq, the driver can register one
function that works with multiple devices. With the current
implementation, a driver that can work with multiple devices has to
create multiple copies of the same function with different parameters so
that each devfreq_cooling_device can use the appropriate one. By
passing a pointer to struct devfreq, the driver can identify which
device it's referring to.
Change-Id: I384bf9aafd2391eccab2ca6a76e4e57f2740aa6b
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Ørjan Eide <orjan.eide@arm.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
(cherry picked from commit 3aa5374376746f20a27be8682be7f91c8b71d1d8)
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/imgtec/rogue/rk3368/rk_init_v2.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/staging/imgtec/rogue/rk3368/rk_init_v2.c b/drivers/staging/imgtec/rogue/rk3368/rk_init_v2.c index 553d0c1377e5..dbb9f9f0b32b 100644 --- a/drivers/staging/imgtec/rogue/rk3368/rk_init_v2.c +++ b/drivers/staging/imgtec/rogue/rk3368/rk_init_v2.c @@ -436,7 +436,8 @@ static u32 static_coefficient; static s32 ts[4]; static struct thermal_zone_device *gpu_tz; -static unsigned long model_static_power(unsigned long voltage) +static unsigned long model_static_power(struct devfreq *devfreq, + unsigned long voltage) { #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0) unsigned long temperature; @@ -477,7 +478,8 @@ static unsigned long model_static_power(unsigned long voltage) / 1000000; } -static unsigned long model_dynamic_power(unsigned long freq, +static unsigned long model_dynamic_power(struct devfreq *devfreq, + unsigned long freq, unsigned long voltage) { /* The inputs: freq (f) is in Hz, and voltage (v) in mV. |