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Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/devicetree/bindings/clock/exynos7-clock.txt | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/exynos7-clock.txt b/Documentation/devicetree/bindings/clock/exynos7-clock.txt new file mode 100644 index 000000000000..789f76132a85 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/exynos7-clock.txt @@ -0,0 +1,67 @@ +* Samsung Exynos7 Clock Controller + +Exynos7 clock controller has various blocks which are instantiated +independently from the device-tree. These clock controllers +generate and supply clocks to various hardware blocks within +the SoC. + +Each clock is assigned an identifier and client nodes can use +this identifier to specify the clock which they consume. All +available clocks are defined as preprocessor macros in +dt-bindings/clock/exynos7-clk.h header and can be used in +device tree sources. + +External clocks: + +There are several clocks that are generated outside the SoC. It +is expected that they are defined using standard clock bindings +with following clock-output-names: + + - "fin_pll" - PLL input clock from XXTI + +Required Properties for Clock Controller: + + - compatible: clock controllers will use one of the following + compatible strings to indicate the clock controller + functionality. + + - "samsung,exynos7-clock-topc" + - "samsung,exynos7-clock-top0" + - "samsung,exynos7-clock-peric0" + - "samsung,exynos7-clock-peric1" + - "samsung,exynos7-clock-peris" + + - reg: physical base address of the controller and the length of + memory mapped region. + + - #clock-cells: should be 1. + + - clocks: list of clock identifiers which are fed as the input to + the given clock controller. Please refer the next section to + find the input clocks for a given controller. + +- clock-names: list of names of clocks which are fed as the input + to the given clock controller. + +Input clocks for top0 clock controller: + - fin_pll + - dout_sclk_bus0_pll + - dout_sclk_bus1_pll + - dout_sclk_cc_pll + - dout_sclk_mfc_pll + +Input clocks for peric0 clock controller: + - fin_pll + - dout_aclk_peric0_66 + - sclk_uart0 + +Input clocks for peric1 clock controller: + - fin_pll + - dout_aclk_peric1_66 + - sclk_uart1 + - sclk_uart2 + - sclk_uart3 + +Input clocks for peris clock controller: + - fin_pll + - dout_aclk_peris_66 |