diff options
| author | Krzysztof Kozlowski <k.kozlowski@samsung.com> | 2015-04-03 11:25:54 +0200 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-06-06 02:17:56 +0900 |
| commit | 29e5eea06bc19114b1df668f85b605914766a899 (patch) | |
| tree | 1ed2b1c02c06e9061584794e141e6796c836211d /Documentation/devicetree/bindings/arm/exynos | |
| parent | 0c5f989f1fde27df3ddb7ffd84525b4b64eb179c (diff) | |
ARM: EXYNOS: Get current parent clock for power domain on/off
Using a fixed (by DTS) parent for clocks when turning on the power
domain may introduce issues in other drivers. For example when such
driver changes the parent during runtime and expects that he is the
only place of such change.
Do not rely on DTS providing the fixed parent for such clocks. Instead
before switching domain off, grab a current parent of a clock with
clk_get_parent().
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/exynos')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/exynos/power_domain.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt index 5da38c5ed476..e151057d92f0 100644 --- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt +++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt @@ -19,9 +19,10 @@ Optional Properties: domains. - clock-names: The following clocks can be specified: - oscclk: Oscillator clock. - - pclkN, clkN: Pairs of parent of input clock and input clock to the - devices in this power domain. Maximum of 4 pairs (N = 0 to 3) - are supported currently. + - clkN: Input clocks to the devices in this power domain. These clocks + will be reparented to oscclk before swithing power domain off. + Their original parent will be brought back after turning on + the domain. Maximum of 4 clocks (N = 0 to 3) are supported. - asbN: Clocks required by asynchronous bridges (ASB) present in the power domain. These clock should be enabled during power domain on/off operations. |