Mainline:Broadcom Kona/Clocks: Difference between revisions

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=== Policies ===

Each CCU has 4 policies. Policies control whether specific clocks ~~are~~ enabled, as well as the frequencies of specific clocks and some voltages, as seen in the frequency/voltage control sections below.

Each CCU has 4 policies. Policies control whether specific clocks can be gated (enabled/disabled), as well as the frequencies of specific clocks and some voltages, as seen in the frequency/voltage control sections below.

According to the mainline driver, these policies are: "Deep Sleep", "Economy", "Normal" and "Turbo", where policy 2 is the default (question is, is it 2 counting from 1 or 0?).

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=== Core clocks and freq policy ===

The second user of this is core clocks - in the core CCU, the frequency policy is used to determine which clock source is used for the CPU - see "Core clocks" section for details. ~~###~~ PI manager and freq policy

The second user of this is core clocks - in the core CCU, the frequency policy is used to determine which clock source is used for the CPU - see "Core clocks" section for details.

=== PI manager and freq policy ===

The PI manager is also able to set this through the <code>pi_set_ccu_freq</code> function, which is only used if <code>CONFIG_CHANGE_POLICY_FOR_DFS</code> is not defined (and it is not defined in the Grand Neo downstream kernel). See "Power Islands" section.

@@ Line 40: / Line 40: @@
 === Policies ===
-Each CCU has 4 policies. Policies control whether specific clocks are enabled, as well as the frequencies of specific clocks and some voltages, as seen in the frequency/voltage control sections below.
+Each CCU has 4 policies. Policies control whether specific clocks can be gated (enabled/disabled), as well as the frequencies of specific clocks and some voltages, as seen in the frequency/voltage control sections below.
 According to the mainline driver, these policies are: "Deep Sleep", "Economy", "Normal" and "Turbo", where policy 2 is the default (question is, is it 2 counting from 1 or 0?).
@@ Line 111: / Line 111: @@
 === Core clocks and freq policy ===
-The second user of this is core clocks - in the core CCU, the frequency policy is used to determine which clock source is used for the CPU - see "Core clocks" section for details. ### PI manager and freq policy
+The second user of this is core clocks - in the core CCU, the frequency policy is used to determine which clock source is used for the CPU - see "Core clocks" section for details.
+=== PI manager and freq policy ===
 The PI manager is also able to set this through the <code>pi_set_ccu_freq</code> function, which is only used if <code>CONFIG_CHANGE_POLICY_FOR_DFS</code> is not defined (and it is not defined in the Grand Neo downstream kernel). See "Power Islands" section.