1menuconfig PM_DEVFREQ
 2	bool "Generic Dynamic Voltage and Frequency Scaling (DVFS) support"
 
 3	help
 4	  A device may have a list of frequencies and voltages available.
 5	  devfreq, a generic DVFS framework can be registered for a device
 6	  in order to let the governor provided to devfreq choose an
 7	  operating frequency based on the device driver's policy.
 8
 9	  Each device may have its own governor and policy. Devfreq can
10	  reevaluate the device state periodically and/or based on the
11	  notification to "nb", a notifier block, of devfreq.
12
13	  Like some CPUs with CPUfreq, a device may have multiple clocks.
14	  However, because the clock frequencies of a single device are
15	  determined by the single device's state, an instance of devfreq
16	  is attached to a single device and returns a "representative"
17	  clock frequency of the device, which is also attached
18	  to a device by 1-to-1. The device registering devfreq takes the
19	  responsibility to "interpret" the representative frequency and
20	  to set its every clock accordingly with the "target" callback
21	  given to devfreq.
22
23	  When OPP is used with the devfreq device, it is recommended to
24	  register devfreq's nb to the OPP's notifier head.  If OPP is
25	  used with the devfreq device, you may use OPP helper
26	  functions defined in devfreq.h.
27
28if PM_DEVFREQ
29
30comment "DEVFREQ Governors"
31
32config DEVFREQ_GOV_SIMPLE_ONDEMAND
33	tristate "Simple Ondemand"
34	help
35	  Chooses frequency based on the recent load on the device. Works
36	  similar as ONDEMAND governor of CPUFREQ does. A device with
37	  Simple-Ondemand should be able to provide busy/total counter
38	  values that imply the usage rate. A device may provide tuned
39	  values to the governor with data field at devfreq_add_device().
40
41config DEVFREQ_GOV_PERFORMANCE
42	tristate "Performance"
43	help
44	  Sets the frequency at the maximum available frequency.
45	  This governor always returns UINT_MAX as frequency so that
46	  the DEVFREQ framework returns the highest frequency available
47	  at any time.
48
49config DEVFREQ_GOV_POWERSAVE
50	tristate "Powersave"
51	help
52	  Sets the frequency at the minimum available frequency.
53	  This governor always returns 0 as frequency so that
54	  the DEVFREQ framework returns the lowest frequency available
55	  at any time.
56
57config DEVFREQ_GOV_USERSPACE
58	tristate "Userspace"
59	help
60	  Sets the frequency at the user specified one.
61	  This governor returns the user configured frequency if there
62	  has been an input to /sys/devices/.../power/devfreq_set_freq.
63	  Otherwise, the governor does not change the frequnecy
64	  given at the initialization.
65
 
 
 
 
 
 
 
 
66comment "DEVFREQ Drivers"
67
68config ARM_EXYNOS4_BUS_DEVFREQ
69	bool "ARM Exynos4210/4212/4412 Memory Bus DEVFREQ Driver"
70	depends on (CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
71	select ARCH_HAS_OPP
72	select DEVFREQ_GOV_SIMPLE_ONDEMAND
73	help
74	  This adds the DEVFREQ driver for Exynos4210 memory bus (vdd_int)
75	  and Exynos4212/4412 memory interface and bus (vdd_mif + vdd_int).
76	  It reads PPMU counters of memory controllers and adjusts
77	  the operating frequencies and voltages with OPP support.
78	  To operate with optimal voltages, ASV support is required
79	  (CONFIG_EXYNOS_ASV).
80
81config ARM_EXYNOS5_BUS_DEVFREQ
82	bool "ARM Exynos5250 Bus DEVFREQ Driver"
83	depends on SOC_EXYNOS5250
84	select ARCH_HAS_OPP
 
 
 
85	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 
86	help
87	  This adds the DEVFREQ driver for Exynos5250 bus interface (vdd_int).
88	  It reads PPMU counters of memory controllers and adjusts the
89	  operating frequencies and voltages with OPP support.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
90
91endif # PM_DEVFREQ

  1menuconfig PM_DEVFREQ
  2	bool "Generic Dynamic Voltage and Frequency Scaling (DVFS) support"
  3	select SRCU
  4	help
  5	  A device may have a list of frequencies and voltages available.
  6	  devfreq, a generic DVFS framework can be registered for a device
  7	  in order to let the governor provided to devfreq choose an
  8	  operating frequency based on the device driver's policy.
  9
 10	  Each device may have its own governor and policy. Devfreq can
 11	  reevaluate the device state periodically and/or based on the
 12	  notification to "nb", a notifier block, of devfreq.
 13
 14	  Like some CPUs with CPUfreq, a device may have multiple clocks.
 15	  However, because the clock frequencies of a single device are
 16	  determined by the single device's state, an instance of devfreq
 17	  is attached to a single device and returns a "representative"
 18	  clock frequency of the device, which is also attached
 19	  to a device by 1-to-1. The device registering devfreq takes the
 20	  responsibility to "interpret" the representative frequency and
 21	  to set its every clock accordingly with the "target" callback
 22	  given to devfreq.
 23
 24	  When OPP is used with the devfreq device, it is recommended to
 25	  register devfreq's nb to the OPP's notifier head.  If OPP is
 26	  used with the devfreq device, you may use OPP helper
 27	  functions defined in devfreq.h.
 28
 29if PM_DEVFREQ
 30
 31comment "DEVFREQ Governors"
 32
 33config DEVFREQ_GOV_SIMPLE_ONDEMAND
 34	tristate "Simple Ondemand"
 35	help
 36	  Chooses frequency based on the recent load on the device. Works
 37	  similar as ONDEMAND governor of CPUFREQ does. A device with
 38	  Simple-Ondemand should be able to provide busy/total counter
 39	  values that imply the usage rate. A device may provide tuned
 40	  values to the governor with data field at devfreq_add_device().
 41
 42config DEVFREQ_GOV_PERFORMANCE
 43	tristate "Performance"
 44	help
 45	  Sets the frequency at the maximum available frequency.
 46	  This governor always returns UINT_MAX as frequency so that
 47	  the DEVFREQ framework returns the highest frequency available
 48	  at any time.
 49
 50config DEVFREQ_GOV_POWERSAVE
 51	tristate "Powersave"
 52	help
 53	  Sets the frequency at the minimum available frequency.
 54	  This governor always returns 0 as frequency so that
 55	  the DEVFREQ framework returns the lowest frequency available
 56	  at any time.
 57
 58config DEVFREQ_GOV_USERSPACE
 59	tristate "Userspace"
 60	help
 61	  Sets the frequency at the user specified one.
 62	  This governor returns the user configured frequency if there
 63	  has been an input to /sys/devices/.../power/devfreq_set_freq.
 64	  Otherwise, the governor does not change the frequency
 65	  given at the initialization.
 66
 67config DEVFREQ_GOV_PASSIVE
 68	tristate "Passive"
 69	help
 70	  Sets the frequency based on the frequency of its parent devfreq
 71	  device. This governor does not change the frequency by itself
 72	  through sysfs entries. The passive governor recommends that
 73	  devfreq device uses the OPP table to get the frequency/voltage.
 74
 75comment "DEVFREQ Drivers"
 76
 77config ARM_EXYNOS_BUS_DEVFREQ
 78	tristate "ARM EXYNOS Generic Memory Bus DEVFREQ Driver"
 79	depends on ARCH_EXYNOS || COMPILE_TEST
 
 80	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 81	select DEVFREQ_GOV_PASSIVE
 82	select DEVFREQ_EVENT_EXYNOS_PPMU
 83	select PM_DEVFREQ_EVENT
 84	select PM_OPP
 85	help
 86	  This adds the common DEVFREQ driver for Exynos Memory bus. Exynos
 87	  Memory bus has one more group of memory bus (e.g, MIF and INT block).
 88	  Each memory bus group could contain many memoby bus block. It reads
 89	  PPMU counters of memory controllers by using DEVFREQ-event device
 90	  and adjusts the operating frequencies and voltages with OPP support.
 91	  This does not yet operate with optimal voltages.
 92
 93config ARM_TEGRA_DEVFREQ
 94	tristate "Tegra DEVFREQ Driver"
 95	depends on ARCH_TEGRA_124_SOC
 96	select DEVFREQ_GOV_SIMPLE_ONDEMAND
 97	select PM_OPP
 98	help
 99	  This adds the DEVFREQ driver for the Tegra family of SoCs.
100	  It reads ACTMON counters of memory controllers and adjusts the
101	  operating frequencies and voltages with OPP support.
102
103config ARM_RK3399_DMC_DEVFREQ
104	tristate "ARM RK3399 DMC DEVFREQ Driver"
105	depends on ARCH_ROCKCHIP
106	select DEVFREQ_EVENT_ROCKCHIP_DFI
107	select DEVFREQ_GOV_SIMPLE_ONDEMAND
108	select PM_DEVFREQ_EVENT
109	select PM_OPP
110	help
111          This adds the DEVFREQ driver for the RK3399 DMC(Dynamic Memory Controller).
112          It sets the frequency for the memory controller and reads the usage counts
113          from hardware.
114
115source "drivers/devfreq/event/Kconfig"
116
117endif # PM_DEVFREQ